Logical backup (exp/imp –> 9i , expdp/impdp –> 10g) Here is a list of 60 interview questions about Oracle Database with their answers. Changes made in SPFILE are dynamically effected with running database whereas PFILE changes are effected after restarting the database. The Control file information can be shown in the initialization parameter file. It is always in open state and allows users to access for queries and reporting at any time. Dba can get the SCN number by querying select SCN from a v$database from SQLPLUS. Your email address will not be published. You can query the V$ACTIVE_INSTANCES view to determine the member instances of the RAC cluster. Creating Oratab entry copying oraenv/db_home to bin location, every 3sec when 100MB is full 1/3 rd of the buffer is full, Current –> LGWR currently writing We need to take AWR report and check query elapsed time and how many executions, Query using proper index or not, or elase we have to analyze table and indexes.Check alertlog any issue occurred. We will check if query is using proper indexes are not. If they are lagging, then we must restore the missing logs. You should change your init.ora file with the following information, log_archive_dest=’/u01/oradata/archlog’ (for example). ... 5+ years of experienced professionals. Following events are recorded in ALERT log file: Database shutdown and startup information. The PFILE is text-based and can be edited in an editor like vi on UNIX or Notepad on Windows. The physical standby database is sync with production by Redo Apply. By this we can easily find out the culprit and kill it . You are here: Home 1 / Latest Articles 2 / Database 3 / Top 50 Oracle Interview Questions and Answers last updated December 18, 2020 / 12 Comments / in Database / by admin 1. List of frequently asked IBM... Data Science with Python Interview Questions and Answers for beginners and experts. From sql we can execute in SQL> show parameter control_files; The primary function of the redo log file is to record all changes made to data. Physical structures are controlled file, datafile and redo log file. 2. and tracking every single activity in the database. These Oracle DBA interview questions and their answers are prepared by industry experts who have more than 8–12 years of experience in Oracle DBA. Ans. There are 3 types of standby database. But we need to know all of the datafiles, logfiles, and settings of MAXLOGFILES. 1. Each instance has buffer cache.oracle RAC combines these buffers logically and maintains integrity GES and GCS are the services involved in it. There are plenty of opportunities in many organizations in the world. These Oracle DBA interview questions and their answers are prepared by industry experts who have more than 8–12 years of experience in Oracle DBA. 1. If a customer calls you about a hanging database session, what will you do to resolve it? oracle apps dba interview questions: 60 awesome oracle apps dba interview questions.Must read to succeed in interviews and jobs oracle apps technical interview questions and answers: 19 oracle apps technical interview questions and answers to succeed in your career. A physical standby database is a robust and efficient DR solution which is easy-to- manage. Here we provide a list of Oracle DBA interview questions to help you clear the Oracle DBA job interview. Oracle DBA Interview Questions and answers for the job placements Here is the list of most frequently asked Oracle DBA Interview Questions and answers in technical interviews. What is an Oracle Instance? What to look for: Detailed information; ... "I worked with 200 Oracle on-premises databases in a mid-size professional services organization and have experience scaling this environment up and down as needed." Lietener.ora and Tnsnames.ora files are used. : Be point to point while answering this question. Using rman we can recover from the failure. Therefore, we get error related to space has been exhausted. Q25.How to open standby database read write mode and again how to rollback, What are options we have to use it. If you are looking for DBA Database Tuning Interview Questions, here is the comprehensive list. Q21.Till yesterday a query is giving output in 1 min. While the db_file-scattered_read event indicates full table scan. If you are a fresher or an experienced, this is the right platform for you which will help you to start your preparation. Ans-Alter table tablename move, We can analyze the table. You initially associate with an inactive case with SQL*Plus and after that startup the case with "startup" direction. INACTIVE –>Logfile not used for recovery If you have to advise a backup strategy for a new application, how would you approach it and what questions will you ask? The language of the DBMS can be integrated with an object- oriented programming language. Q12.What is the difference between SPFILE and PFILE? That is the reason why without control file database cannot be up. It is used to set overall size of work-area required by various components. Modify UNDO_RETENTION or use larger rollback segments. By going through this questionnaire, anyone must be able to recognize the questions and explanations provided. I hope these questions will help you in your Oracle DBA interview. parameters in this file are necessary to start a DB. oracle apps dba interview questions: 60 awesome oracle apps dba interview questions.Must read to succeed in interviews and jobs oracle apps technical interview questions and answers: 19 oracle apps technical interview questions and answers to succeed in your career. This type of standby database can be altered to have a different structure and so not always exact replica of production. Ø It is a Mixture of Maximum Protection and Maximum Performance. This output can be used for control file recovery as well. As a thumb rule, you must shutdown your database before you perform full backup. Oracle Interview Questions and Answers. normalization benefits in identifying specific relationships between schema objects. So, You still have the opportunity to move ahead in your career in Oracle RAC Development. Ans-It is an database object used to increase the performance for retrieval data. Recovery catalog also holds RMAN stored scripts. Once original database objects remain classified. B-tree index – Retrieves a small amount of information from a large table. It contains physical and logical structures. Recovery catalog contains the inventory of backups taken by RMAN from the database. Cold Backup: Backup is taken when DB is down and in mount stage, ( select file_id, max(block_id+blocks) hwm. An Oracle database is an accumulation of information treated as a unit. ... 5+ years of experienced professionals. Q56.How will you backup all datafiles from Linux? Haw many databases and what sizes? When a row is too long that it cannot and then it will end up accepting consequent blocks which can be lead to this concept of Row Chaining. for the current user. A full backup can be performed when our database runs in NON ARCHIVE LOG mode. These questions and answers are suitable for both freshers and experienced professionals at any level. Q32.How do understanding for row Chaining? oracle apps dba interview questions: 60 awesome oracle apps dba interview questions.Must read to succeed in interviews and jobs oracle apps technical interview questions and answers: 19 oracle apps technical interview questions and answers to succeed in your career. It is done when maintanance is planned.It is a reversible role transition. You can easily create PFILE from SPFILE simply by giving create PFILE from SPFILE; All the parameter values are now updated with SPFILE. Q51.How will you recover the database from a loss of a data file? 7 Database Administrator Interview Questions and Answers . The control file contains the physical structure of the database, such as the number of log files and their location. … Oracle Database is the primary database intended for big business framework figuring, the most adaptable and practical approach to oversee data and applications. In large enterprise environments, the job is often divided among several DBAs, each with their own area of specialty, such as the database security administrator or database tuning expert. We can take export(exp) in four levels. Learn Oracle DBA from Intellipaat Oracle DBA training and excel in your career. It allows user to use the standby database in read write mode (like standalone database) while still receiving the redo logs from primary. Create spfile from pfile; OEM will recognize the status of the down database and will introduce you " Startup" catch. Q35.Different areas where we can perform tuning? Which software Course is the Best to Get a High Paying Job Quickly? When the database is active and running and during this time a backup is taken then it is hot backup. DBWR is a background process which writes data blocks info from DB buffer cache to data_files. 250+ Oracle Core Dba Interview Questions and Answers, Question1: What is Consistent Backup? Rolling –> Each node is patched one by one. It supports all data types and can reduces workload from primary database. It is responsible to writing data from database buffer cache into datafiles. As long as all data files are safe and on a successful completion of it is ok, We can restore the control file by performing following commands CONNECT INTERNAL STARTUP MOUNT and then, you can TAKE ANY OFFLINE TABLESPACE (Read-only), after that you have to ALTER DATABASE DATAFILE (OFFLINE), RECOVER DATABASE USING BACKUP CONTROL FILE, Shutdown and back up the system. So, this article on Oracle interview questions will cover the most frequently asked interview questions and help you to brush up your knowledge before the interview. Q52.How to check the current database name? RAC specific why-database-not-startup-automatic in 11gR2 cluster Q20.How do you identify which sessions are locking the objects? Explore Now! Get top rated Oracle DBA interview questions here-. Prophet utilizes Tablespace for consistent information Storage. Q29.What is an explain plan and how does it help in optimizing the SQL Query? select COMP_ID,COMP_NAME,STATUS from dba_registry; Q27.What makes you mean by Database Normalization? For such queries the specified cluster key value is hashed. A database buffer cache stores the data in memory for quicker access. A Data Guard is to protect production data and continue the critical business applications in case of any disaster event. To get data inside these indexes, rebuilding is completed. When number from infected blocks provides a threshold. The last SCN number. These oracle performance tuning interview questions will help you to crack your oracle job interview. sysoper: can do all kinds of DBa works but cant create a DB with this user. If you're looking for Oracle RAC Interview Questions for Experienced or Freshers, you are at the right place. Its value can be known by querying v$pgastat dynamic performance view. Logical: Database buffer cache, Redo log buffer cache,Shared pool,large pool. These 45 solved Oracle questions will help you prepare for technical interviews and online selection tests conducted during campus placement for freshers and job interviews for professionals. DBA need to select the option based on either application is looking for benefit of performance or protection. Minimum Downtime Patching –> some nodes are up.some nodes under patching, unwanted process or ubnormally terminated process A full backup is a backup of all the control files, data_files, and parameter_file both SPFILE binary file and PFILE-static). A tablespace can have objects from various outline's and construction can have numerous tablespace's. The database makes " Framework tablespace" as a matter of course amid database creation. Information records will be associated with the tablespace. There are a lot of opportunities from many reputed companies in the world. Oracle Database Interview Questions are the frequently asked questions in the interview process for database related job roles. STATSPACK – (Stands for Statistics Package), ADDM – (Automated Database Diagnostics Monitor). So even though it corrupts or lost, from the backup the database can be restarted. This list includes questions for junior, experienced and characteristics of Oracle database, roles of a database administrator, tools used for administering Oracle database, comparing a cluster and a grid, Oracle Grid Computing Architecture and more. It has the information when was the last database backup was taken, whether is failed or success. List of frequently asked... Informatica MDM Interview Questions and Answers Are you aspiring to start your career... PySpark Interview Questions and Answers Are you looking for a career in Apache... Flutter and Dart Interview Questions and Answers Are you looking for the best... Microsoft Dynamics CRM Interview Questions Have you come here in search of Microsoft... Angular 8 Interview Questions and Answers for beginners and experts. select round ((I.instance/+zn.db)*100,2) as “%AGE_CONN” from (select count(*) as instance from v$session where username not like ‘%SYS%’) I, (select count(*) as db from gv$session where username not like ‘%SYS%’) zn; select object_name,object_type,owner from dba_objects where object_name=’USER_MCC_REPORT_UPDATE’; select text from user_source where name = ‘ENDUR.USER_MCC_REPORT_UPDATE’ order by line; IBM WMQ Interview Questions and Answers for beginners and experts. You must also backup your ORACLE_HOME binaries which are used for cloning. All trademarks are properties of their respective owners. Q55.How will you backup all redo log file from Linux? Areas in Chennai which are nearer to us are Adambakkam, Adyar, Alandur, Arumbakkam, Ashok Nagar, Besant Nagar, Chengalpet, Chitlapakkam, Choolaimedu, Chromepet, Ekkaduthangal, Guindy, Jafferkhanpet, K.K. Db_file_sequential_read event generally indicates index usage. physical: Datafile,Controlfiles, redologfiles. Redo log buffer cache records all changes made to the data files. Oracle Database Administrator Interview questions and answers. A database server also prevents unauthorized access and provides efficient solutions for failure recovery. When Can Hash Cluster Used? You can start up a database with three devices. Make sure you backup your database before switching to ARCHIVELOG mode. TM Lock – Acquired once for each object, which is being changed. Let’s start by looking at a few of the most frequently asked Oracle DBA interview questions: Q1. Oracle DBA Interview Questions and Answers. New connections will not be% accepted and will not come down until %existing transactions to commit and exit or close themselves. BDreamz Global Solutions Private Limited. A profile is the resource limit(session per user,connect time,password expiry,password login atteps) These oracle performance tuning interview questions will help you to crack your oracle job interview. and then shutdown instance and startup once again. Database files (Header of datafiles is freezed during backup). If you want to learn Practical Oracle DBA Training then please go through this Oracle DBA Training in Chennai and Oracle DBA Training in Bangalore. Oracle is also a database server, which manages data in a very structured way. 1. As an Oracle DBA, you can expect to be involved in the following tasks: Performing upgrades of the database and software to new release levels, Starting up and shutting down the database, Managing the database’s storage structures, Managing schema objects, such as tables, indexes, and views, Making database backups and performing recovery when necessary, Proactively monitoring the database’s health and taking preventive or corrective action as required. Before DBWR writes modified blocks to the datafiles, LGWR writes to the. Oracle Performance Tuning Interview Questions and answers are very useful to the Fresher or Experienced person who is looking for a … the primary is converted to standby and viceversa, CRSd–> Cluster Ready Service Deamon.Mainly for managing HA(High Availability) PGA_AGGREGATE TARGET parameter specifies target aggregate PGA memory available to all server process attached to an instance. Q45.Clarify the devices which are utilized to fire up an Oracle database? DBWR is a background process that writes changed data blocks of defense amounts over this data file. Hash cluster Index – Refers to the index that is defined specifically for a hash cluster. Index can be created on one or more columns of a table. how you will troubleshoot this problem? The questions are for intermediate to somewhat advanced Oracle DBA professionals, but even if you are just a beginner or fresher you should be able to understand the answers and explanations here we give. ©, 2020. These questions and answers are suitable for both freshers and experienced professionals at any level. Question2: What is fractured Block? Library cache is used to store Oracle statements.Data Dictionary Cache contains the definition of Database objects and privileges granted to users. These 50 solved Oracle 11g questions will help you prepare for technical interviews and online selection tests conducted during campus placement for freshers and job interviews for professionals. Ø Use SYNC/AFFIRM I/O where Primary waits for acknowledgement that redo has been transmitted synchronously and written to disk. AWR: AWR report mainly we have to analyze query elapsed time and executions. Due to various insert & delete actions, that file gets fragmented & unstructured data, through creating that relationship slowly. Note: RAM is a user in the database, exp system/manager file=’/u01/app/oracle/ctstab.dmp’ log=’/u01/app/oracle/ctstab.log’ tables=ram.emp, imp system/manager file=’/u01/app/oracle/ctstab.dmp’ log=’/u01/app/oracle/ctstab_imp.log’ fromuser=ram touser=ram tables=emp, Shared pool,Db buffer cache and Redo buffer cache are the components of SGa, A java based utility that applies or rollback of patches to oracle software. INVALID –>When LGWR cannot write or ACCESS, Collection of high impact, low risk and proven fixes for a specific product, All node –> Patches done at all nodes at a time This is good feature in DR drill/Testing or bug fixing on production or in reporting purpose. For the professionals who are looking forward to attending Oracle Database Administrator interview in recent times, here are some of the most popular interview questions and answers that will definitely help you in the right way. This Oracle DBAInterview Questions and answers are prepared by Oracle DBA Professionals based on MNC Companies expectation. Hot Backup: Backup is taken when DB is up and running. The ID1 column identifies the object being modified. COLD backup(User managed & RMAN) and HOT backup(User managed & RMAN). It can signify avoided by refreshing this storage parameter over an appropriate value. According to research, Oracle RAC has a market share of about 1.0%. All the tables are stored in data files. Db_file_sequential_read event reads a single block at one time. His duty is to take backup of the growing data, and install patches, and secure the data. Q39.What are the specific disk components? Oracle Questions Did you use online or off-line backups? alter database enable block change tracking using file ‘Location/blk_change.dbf’; It is herat of RAC feature used for data Integrity. What is the way to clear them? SQL> select file_name, hwm, blocks total_blocks, blocks-hwm+1 shrinkage_possible, FILE_NAME HWM TOTAL_BLOCKS SHRINKAGE_POSSIBLE, set markup html on spool on spool select_result.html, select table_name, tablespace_name from all_tables. Here is the list of most frequently asked Oracle DBA Interview Questions and answers in technical interviews. Ø Standby redo logs are required for this configuration, Ø Highest level of performance and lowest degree of protection compare to other modes. cluster loses connectivity between each other and starts to function independantly. Dear Readers, Welcome to Oracle 11g Interview questions with answers and explanation. Normalization technique is a set of rules that exist used to build this relational database to prevent data redundancy also dependency. To update the DB components with the new atch details and get validated. Here we provide a list of Oracle DBA interview questions to help you clear the Oracle DBA job interview. Answer : Hash clusters are better choice when a table is often queried with equality queries. There are a lot of opportunities from many reputed companies in the world. SQL> select status,error from gv$archive_dest where dest_id=2; ERROR ORA-00270: error creating archive log ERROR ORA-00270: error creating archive log ERROR ORA-00270: error creating archive log. 2. Oracle provides software to create and manage the Oracle database. Parameters in SPFILE are changed dynamically.. RMAN cant backup PFILE, It can backup SPFILE. You cannot up the database if control file is lost or damanged. Oracle Database is a database management system, where data are inserted and retrieved. The logical structure is a database, tablespace, segment, extent, and blocks. We can find out using v$session_waits and v$ system _waits. Q18.What are the different types of backups that are available in Oracle? Oracle Exadata Database is the database primarily developed by Oracle which provides optimized functionality. LGWR writes redo or changed information from redo log buffer cache in cyclic fashion to redo log files. Data files, Control files , Redolog file Password files, Parameter files. 1) What are the components of physical database structure of Oracle database? The objects as such can be stored in the database. It contains read-just information word reference tables which contain data about the database. Home Blogs Interview Questions Oracle DBA Interview Questions and Answers. For RAC,if n number of redo logfile in primary, then nuber of thread *(n+1) standby redo logfile should be created for standby. are clean shutdown methods as database maintains its consistency. A standby database is a database replica created by taking a backup of a primary database. Starting from your Name the candidate must cover his professional experience. Q44.What is Oracle and what is it utilized for? The control file is a binary file which has the physical structure of a database. To use this feature FLASHBACK_ON parameter needs to be set and flashback point should be created beforehand. 2. All Rights Reserved. It is network connectivity, Application and sql developer tool to access database. SQL*Plus: This is the most generally utilized choice. Oracle DBA Interview Questions and Answers. $cp *.log/u01/app/backup/db_name (This command will copy all redo log file. you can send me your word document at **email address removed by Netminder 18 Oct 2005**. By combining V$locked_object and v$session. Mary has a view called EMP_DEPT_LOC_VU that was created based on the EMPLOYEES, DEPARTMENTS, and LOCATIONS tables. One or more data files. List of frequently... We are conveniently located in several areas around Chennai and Bangalore. Q30.How can we identified the resources for which the sessions are waiting? These questions and answers are suitable for both freshers and experienced professionals at any level. Physical backup User locks – Created and managed using dbms_lock package. These 50 solved Oracle 11g questions will help you prepare for technical interviews and online selection tests conducted during campus placement for freshers and job interviews for professionals. Library cache, Database Buffer Cache, Data Dictionary cache, Redo log Buffer cache, Shared Pool. Taking backups of everyday task, so that the datas are not lost . The list contains questions useful for basic, freshers and experienced oracle professionals.Download Complete Oracle Interview Questions PDF. We can query v$controlfile to display the names of control files Oracle Performance Tuning Interview Questions And Answers. Oracle Dba Interview Questions by questionsgems. Spfile: Server parameter file of binary file, It contains all the information for setting the database initialization parameters. Ø Can use either SYNC/AFFIRM (Primary waits for acknowledgement that redo has been transmitted synchronously and written to disk) or SYNC/NOAFFIRM (Primary waits only for the acknowledgement that redo has been transmitted synchronously) based on what. When the server method demands free space in buffer cache to read new blocks. The Oracle Certified Professional (OCA/OCP) Database Administrator (DBA) accreditation is intended to reflect capability in Oracle database engineering, establishment, organization, execution tuning, and investigating. Ø Highest level or protection and Zero data loss in case of any DR event. 11G also supports heterogeneous configurations in which the primary and standby systems may have different bit/processors or OS version. That is, it synchronizes the information hinders in the support reserve with the datafiles on circle. A checkpoint plays out the accompanying three tasks: Every filthy square in the cushion reserve is kept in touch with the information records. Alert log file is a log file that records database-wide events which is used for trouble shooting. When the instance crash happens and data are missed to write in the data file, then the changes can be obtained from the redo log, so work is never lost. Question3: What are the steps to performing complete recovery on the whole database? Dba_Registry ; Q27.What makes you mean by database normalization loss in case any... Above set would have provided you a good knowledge of any DR event a thumb rule, are. Wait_For_Gap ’ message again how to rollback, What will you do to resolve it connections will not %. Very structured way giving create PFILE from SPFILE ; all the changes made to the database UNIX... Ges and GCS are the different tools that are provided by Oracle which provides optimized functionality estimate goes beyond dump! Active_Instances view to determine the member instances of the advanced ideas of Oracle database server uses control... Happens when it does not have enough space in the support reserve with the following will be.... Growing data, and website in this file are necessary to start a DB from database! Whenever number of databases being monitored by the metadata managed by RMAN for data! Backup is not available, then we must restore the missing logs network connection to a database data are and... Get validated production database you should change your init < SID >.ora parameter file datafile... You can not be % accepted and DB will not come down until existing % connections exit or themselves... Backups that are provided by Oracle to assist oracle dba interview questions for experienced professionals monitoring all the information will get away. Wait_For_Gap ’ message different bit/processors or OS version are in the USER_DUMP_DEST parameter with the help of and... Scn is an accumulation of information treated as a partition also can accessed. Will take the backup data blocks only those got changed since last backup, through creating relationship... Can reduces workload from primary database ans-it is an accumulation of information treated a... ) hwm to determine the member instances of the datafiles, lgwr writes to the Oracle server quot ; &. ( Automated database Diagnostics Monitor ) stage, ( select file_id, max ( block_id+blocks ) hwm is to backup. And Zero data loss can happen in case if standby site is not available it starts in. Running and during this time a backup of all the parameter values are now updated with SPFILE stored! Got changed since last backup if control file database can be restarted select SCN a. Loses connectivity between each other and starts to function independantly and website in this article, you might the. Through creating that relationship slowly specifies TARGET aggregate pga memory available to the area disk... Replica created by taking a backup strategy for a session area on disk that stores the specified rows need... Is network connectivity oracle dba interview questions for experienced professionals application and SQL developer tool to access for and! Changes that were made in PFILE would only take effect when the.. Reserve with the datafiles, lgwr writes to the datafiles, logfiles, and control information is.... – created and managed using dbms_lock Package, DEPARTMENTS, and secure the data in memory quicker! N'T let the Lockdown slow you down - Enroll now and get 3 Course at only. 1 min Refers to the database can be altered to have minimum 2 standbys when configuring maximum however... Files getting generated with the help of filesize and estimate_only clause from Linux server attached. Information is stored DR site hope the above link to read more and to become a DBA. Any changes that were made in PFILE would only take effect when the.! Rac specific why-database-not-startup-automatic in 11gR2 cluster Oracle database server, DBA has a market share of about %. Answers, prepared by 10+ years of experience in Oracle RAC Development to avoid unwanted outages on production in. Redo logfile loss in case you are looking for Oracle DBA professionals based on the whole?. Example ) Oracle Apps DBA Interview questions with answers and explanation reads a single block at one time % transactions... To move ahead in your career in Oracle DBA training and excel your... Retrieved faster for any future requests reduces workload from primary database issue commits only when is. Schema objects access for queries and reporting at any time in many organizations in the undo just through... Requiring you to start your preparation any time events which is taken when DB is down in... More about Oracle DBA from Intellipaat Oracle DBA Interview questions with answers by Technologies!, through creating that relationship slowly information can be used for control file information can be faster! Data redundancy also dependency get 3 Course at 25,000/- only for both and. Answers by Besant Technologies supports the students by providing Oracle DBA Interview questions Oracle Interview! Locations tables again how to rollback, What are the different tools that are available in Oracle DBA Interview for! Db, then you are in the USER_DUMP_DEST parameter corresponding variety into a approach. Effect when the database is used to store and recover related data you need select. The redo logs track and store all the parameter values are now updated with SPFILE acknowledgement. At a few of the advanced ideas of Oracle database Administrator Interview questions with answers and.. Process attached to an instance PFILE would only take effect when the server method demands space. The Oracle DBA professionals based on either application is looking for benefit of and... Experienced Oracle professionals.Download complete Oracle Interview questions and answers for experienced professionals at any.... Cyclic fashion to redo log files or more columns of a database replica created taking. Have the opportunity to move ahead in your Oracle job Interview crack your Oracle job Interview maximum! Holds datafiles in its diskgroups clean shutdown methods as database maintains its consistency also a database, the Oracle are... Spfile are dynamically effected with running database whereas PFILE changes are effected after the. Resolve it and high availability of data and update it through SGA the atch! Comprehensive list database creation and has to be multiplexed which software Course is the one-stop resource from you. Is freezed during backup ) RAC feature used for trouble shooting and sync with production is connectivity! Specified cluster key value is hashed failed due to archivelogs error, What are the actions to... Help in optimizing the SQL query and to become a Oracle DBA is going to develop more 8–12. Interview preparation and has to be online always the number of log files contains the... To recognize the questions and answers, prepared by 10+ years experienced industry who... Manager regardless of whether the database consists of physical database structure alert log file from Linux provides optimized functionality server! The networking industry benefits in identifying specific relationships between schema objects developer tool to access database multiplexed... 46 % created and managed using dbms_lock Package, Shared pool, large pool will... Are optional when you create a DB with this user is converted back to physical database... Spfile from PFILE ; and then shutdown instance and startup once again oracle dba interview questions for experienced professionals... On Windows * * email address removed by Netminder 18 Oct 2005 * * address. This data file start your preparation until existing % connections exit or close.! Would have provided you a good knowledge of any disaster event atch details and get 3 Course at only... Feature in DR drill/Testing or bug fixing on production loss of a primary database set to true a! And executions of work-area required by various components mary has a view called that... A hanging database session, What are the two involved in network connection to a...., extent, and website in this browser for the job placements and job purposes questions will you! Segment, extent, and secure the data in a multi user environment so that can... Multi user environment so that many users can concurrently access the database primarily developed by database! Dba works but cant create a DB with this user these Oracle performance Tuning Interview questions answers... Occur accessed separately mining the redo log buffer cache, Shared pool, large pool made in would. Junior DBA accompanying three tasks: every filthy square in the world touch with the records... Outages on production or in reporting purpose database schema that holds by the catalog Oracle Interview questions answers... Missing logs redo files when the database can we identified the resources which... Get validated widely used in multinational companies of DBA works but cant create a.! Acknowledgement of redo transmission What are the components of physical and logical structures in which system, user and. Many users can concurrently access the same data the whole database each instance has buffer RAC..Ora file with the help of filesize and estimate_only clause best execution plan database! Are waiting as soon as you start a DB to advise a backup of all changes. Increase the performance for retrieval data clear the Oracle DBA or Junior DBA be % and. Query the v $ database from SQLPLUS as show parameter pga last backup Microsoft SQL server, is. Files getting generated with the new atch details and get validated to disk like maximum protection mode standby... And get 3 Course at 25,000/- only like maximum protection however in case of any of the down and... View to determine the member instances of the advanced ideas of Oracle database back to standby! Loss can happen in case of any DR event it does not enough. Every transaction ’ ll discover What you need to know all of the RAC cluster shutdown. By using command from SQLPLUS as show parameter pga to fire up Oracle! Frequently accessed so that many users can concurrently access the database is in mode... And Zero data loss in case of any disaster event data protection and Zero data in! Experienced or freshers, you still have the opportunity to move ahead in your Oracle job Interview to writing from!