That is, it synchronizes the information hinders in the support reserve with the datafiles on circle. Following events are recorded in ALERT log file: Database shutdown and startup information. Ø Data loss can happen in case of failover, Ø Uses ASYNC/NOAFFIRM I/O where primary will not wait for acknowledgement of redo transmission. BDreamz Global Solutions Private Limited. All Rights Reserved. Which software Course is the Best to Get a High Paying Job Quickly? Q7.How to check opatch applied or not in our Oracle home? The shrinkage is in blocks, to get how much you can shrink multiply by block%size of the database to TOTAL_BLOCKS SHRINKAGE_POSSIBLE to find out amount of space will be released . We can find the Log file in BACKGROUND_DUMP_DEST parameter. Therefore, we get error related to space has been exhausted. Oracle Database Administrator Interview questions and answers. UL Lock – Defined with dbms_lock package. Cold backup is taken when the database is in offline mode. Whenever number of changed blocks reaches a maximum value. Index can be created on one or more columns of a table. Q21.Till yesterday a query is giving output in 1 min. how you will troubleshoot this problem? So even though it corrupts or lost, from the backup the database can be restarted. Oracle Apex Interview Questions for Experienced Professionals Q1. The PFILE is text-based and can be edited in an editor like vi on UNIX or Notepad on Windows. Oracle DBA Interview Questions and answers for beginners and experts. Answer: It is used to security of our database, Privileged IP address only able to access the database. Incremental backups will take the backup data blocks only those got changed since last backup. ©, 2020. OEM will recognize the status of the down database and will introduce you " Startup" catch. Physical structures are controlled file, datafile and redo log file. Modify UNDO_RETENTION or use larger rollback segments. Not my recommendation, it is simply switching off. 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. Q34.Different tools that are provided by Oracle to assist performance monitoring? What is the way to clear them? If you're looking for Oracle RAC Interview Questions for Experienced or Freshers, you are at the right place. You must also backup your ORACLE_HOME binaries which are used for cloning. It is used for restoring a physical backup, reconstruct it, and make it available to the Oracle server. List of frequently asked IBM... Data Science with Python Interview Questions and Answers for beginners and experts. The certification names are the trademarks of their respective owners. When the database is active and running and during this time a backup is taken then it is hot backup. normalization benefits in identifying specific relationships between schema objects. 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. today it is taking 5 min. To get data inside these indexes, rebuilding is completed. If you are preparing for Oracle Exadata Database job interview, we will help you in clearing the interview through Wisdomjobs interview questions and answers page. It contains read-just information word reference tables which contain data about the database. Schema(User) Level export/import, exp system/manager file=’/u01/app/oracle/ctsuser.dmp’ log=’/u01/app/oracle/ctsuser.log’ owner=ram 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. These oracle performance tuning interview questions will help you to crack your oracle job interview. A full backup is a backup of all the control files, data_files, and parameter_file both SPFILE binary file and PFILE-static). We can query v$controlfile to display the names of control files ADDM: It is a utility helps in providing some recommendations based on the statistics collected every hour. MAXLOGMEMBERS, MAXLOGHISTORY, MAXDATAFILES for the database to use the command. restarting dead dispatchers, Datablock –> Extent –> Segment –> Tablespace –> Database, A synonym is also known as alias for a table,view,sequence or program unit, FOr standalone, if n number of redo logfile in primary, then (n+1) standby redo logfile should be created for standby When Can Hash Cluster Used? Also, we can check alert logs on both standby and primary database. Stay tuned we will update New Oracle DBA Interview questions with Answers Frequently. SPFILE is available from Oracle 9i and above. “Very useful questions and proper answers of Oracle DBA HR Interviews” Here are some common and general interview questions raised by either HR department or It recruiters. 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. SCN is a unique ID that Oracle generates automatically for every transaction which is committed., It is recorded for every change in the redo entry. Q15.If the table is fragmented, how would you rebuild it? Library cache, Database Buffer Cache, Data Dictionary cache, Redo log Buffer cache, Shared Pool. Q30.How can we identified the resources for which the sessions are waiting? If standby site is not available because of network or any reason, Primary database will be brought down to maintain level of data protection. Oracle Interview Questions and Answers. Prophet Enterprise Manager: This is another method for beginning up a database. Question4: What are the steps to performing complete recovery on a tablespace or datafile? 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. From the views % v$session% and % v$process%, mkdir -p /db_name/oracle/admin/scripts cp -R copy directory tree, scp rman_driver_10g.sh firstname.lastname@example.org:/GDSNP/oracle/admin/scripts. Here is the list of most frequently asked Oracle DBA Interview Questions and answers in technical interviews. The control file contains the physical structure of the database, such as the number of log files and their location. Ø It is a Mixture of Maximum Protection and Maximum Performance. Oracle Questions Did you use online or off-line backups? Download of oracle dba interview questions and answers as PDF is also given below The language may even be exactly the same as that used in the application, which does not force the programmer to have two representations of his objects. All this is accomplished while delivering high performance. There are 3 types of standby database. AWR: AWR report mainly we have to analyze query elapsed time and executions. Whereas db_file_scattered_read event reads multiple blocks. SQL_TRACE parameter can be set at database, instance, or session level. ... as well as a brief explanation of their experience level with each. There are 3 types of protection mode for standby database. If a customer calls you about a hanging database session, what will you do to resolve it? Dear Readers, Welcome to Oracle Interview questions with answers and explanation. We provide the Oracle DBA online training also for all students around the world through the Gangboard medium. Information records will be associated with the tablespace. The software that manages the database is called the Oracle database server. It is network connectivity, Application and sql developer tool to access database. SPFILE is by default created during database creation whereas PFILE should be created from, PFILE is static text file whereas SPFILE is binary file, you cannot edit binary file which is spfile but the static pfile file can be edited. SELECT blocked_locks.pid AS blocked_pid, blocked_activity.usename AS blocked_user, blocking_locks.pid AS blocking_pid, blocking_activity.usename AS blocking_user, blocked_activity.query AS blocked_statement, blocking_activity.query AS blocking_statement FROM pg_catalog.pg_locks blocked_lock, JOIN pg_catalog.pg_stat_activity blocked_activity ON blocked_activity.pid =, JOIN pg_catalog.pg_locks blocking_locks, ON blocking_locks.locktype = blocked_locks.locktype, AND blocking_locks.DATABASE IS NOT DISTINCT FROM blocked_locks.DATABASE, AND blocking_locks.relation IS NOT DISTINCT FROM blocked_locks.relation, AND blocking_locks.page IS NOT DISTINCT FROM blocked_locks.page, AND blocking_locks.tuple IS NOT DISTINCT FROM blocked_locks.tuple, AND blocking_locks.virtualxid IS NOT DISTINCT FROM blocked_locks.virtualxid, AND blocking_locks.transactionid IS NOT DISTINCT FROM blocked_locks.transactionid, AND blocking_locks.classid IS NOT DISTINCT FROM blocked_locks.classid, AND blocking_locks.objid IS NOT DISTINCT FROM blocked_locks.objid, AND blocking_locks.objsubid IS NOT DISTINCT FROM blocked_locks.objsubid, AND blocking_locks.pid != blocked_locks.pid, JOIN pg_catalog.pg_stat_activity blocking_activity ON blocking_activity.pid = blocking_locks.pid. As soon as you start a database, the instance sit in RAM, and retrieves the data and update it through SGA. The database consists of physical and logical structures in which system, user, and control information is stored. Que: Tell us something about yourself? 7 Database Administrator Interview Questions and Answers . exp system/manager file=’/u01/app/oracle/ctsfull.dmp’ log=’/u01/app/oracle/ctsfull.log’ full=y PS: We assure that traveling 10 - 15mins additionally will lead you to the best training institute which is worthy of your money and career. DBA has the authority to create new users, remove existing users or modify any of the environment variables or privileges assigned to other users. Each question contains their answer also. Oracle by default starts with SPFILE located in $ORACLE_HOME/dbs. alter database mount standby database; select name from v$database; alter system set standby_file_management=manual; ALTER DATABASE RECOVER MANAGED STANDBY DATABASE FINISH ; CREATE RESTORE POINT DR_TEST_25032016 GUARANTEE FLASHBACK DATABASE; ALTER DATABASE ACTIVATE STANDBY DATABASE; ALTER DATABASE SET STANDBY DATABASE TO MAXIMIZE PERFORMANCE; ALTER DATABASE OPEN; set long 90000 pages 0 lines 400 trimsp on. The database can be recovered using the backup which is taken already. Hot backup is taken when the database is still online and database should be in ARCHIVE. Calculate the number of dump files getting generated with the help of filesize and estimate_only clause. As a thumb rule, you must shutdown your database before you perform full backup. Lietener.ora and Tnsnames.ora files are used. All trademarks are properties of their respective owners. A binary file that records physical straucture of the DB,needed to startup the DBand operate it Ans-It will help optimizer to generate best execution plan. Oracle Interview Questions. Recovery catalog also holds RMAN stored scripts. Rolling –> Each node is patched one by one. Read Senior Oracle Database Administrator interview questions, with detailed experience and preparation tips shared by people who have been through Software Engineer interview and increase your chances of getting selected. In UNIX they are stored in the location $ORACLE_HOME/dbs and ORACLE_HOME/database for Windows directory. This is good feature in DR drill/Testing or bug fixing on production or in reporting purpose. 2. Yes, the damaged blocks can be recovered. Top Oracle DBA, RAC, and Performance Tuning Questions on Advanced Topics for Experienced Professionals: In continuation of the previous article, Top Oracle interview questions , this article includes a set of interview questions to cover some advanced Oracle concepts like database architecture, backup/recovery of database and performance tuning. I have divided the questions into 3 categories Technical Interview Questions, Unix Related questions asked to an Oracle Database Administrator (DBA) and Backup and Recovery Interview Questions commonly asked in Oracle DBA interview. These 45 solved Oracle questions will help you prepare for technical interviews and online selection tests conducted during campus placement for freshers and job interviews for professionals. The location of user process trace file is specified in the USER_DUMP_DEST parameter. SQL> select flashback_on from v$database; FLASHBACK_ON, ORA-03206: maximum file size of (4194304) blocks in AUTOEXTEND clause is out of range, I will limit the max size within the range of allowed value i.e < 32 G, alter tablespace ORA_DATA add datafile ‘+MRCP_DATA’ size 1G autoextend ON next 25M maxsize 31G, I will check if database is reachable and do ping test, tnsping ‘(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=alphaddbp001- vip)(PORT=1521))(CONNECT_DATA=(SERVICE_NAME=ORAPDB1)))’. and then shutdown instance and startup once again. We can activiate by following below steps. SCN is an ID that Oracle makes to every transaction. Oracle DBA Interview Questions and Answers. All the tables are stored in data files. Make sure you backup your database before switching to ARCHIVELOG mode. SHUTDOWN NORMAL, TRANSACTIONAL, IMMEDIATE. This output can be used for control file recovery as well. The database is updated using SQL statements generated by mining the redo logs. Taking backups of everyday task, so that the datas are not lost . Ø At least one standby database should get synchronized before the transaction commits at primary. imp system/manager file=’/u01/app/oracle/ctsfull.dmp’ log=’/u01/app/oracle/ctsfull_imp.log’ full=y 7 Database Administrator Interview Questions and Answers . Don't let the Lockdown slow you Down - Enroll Now and Get 3 Course at 25,000/- Only. B-tree index – Retrieves a small amount of information from a large table. 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. These questions are common for both Senior Oracle DBA or Junior DBA. Oracle Performance Tuning Interview Questions And Answers. That is the reason why without control file database cannot be up. However, received redo logs from Primary will apply only when snapshot is converted back to Physical standby. Nagar, Kodambakkam, Kottivakkam, Koyambedu, Madipakkam, Mandaveli, Medavakkam, Mylapore, Nandambakkam, Nandanam, Nanganallur, Neelangarai, Nungambakkam, Palavakkam, Palavanthangal, Pallavaram, Pallikaranai, Pammal, Perungalathur, Perungudi, Poonamallee, Porur, Pozhichalur, Saidapet, Santhome, Selaiyur, Sholinganallur, Singaperumalkoil, St. Thomas Mount, T. Nagar, Tambaram, Teynampet, Thiruvanmiyur, Thoraipakkam, Urapakkam, Vadapalani, Valasaravakkam, Vandalur, Velachery, Virugambakkam, West Mambalam. You should change your init.ora file with the following information, log_archive_dest=’/u01/oradata/archlog’ (for example). select text from dba_source where name = ‘USER_MCC_REPORT_UPDATE’ order by line; If you have to find out how many sessions are connected to the temporary tablespaces. A Data Guard ensures data protection and high availability of data and control file records the physical structure of the database. What is an Oracle Instance? The control file is a binary file which has the physical structure of a database. Oracle database server uses a control file to find its physical component. 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. If they are lagging, then we must restore the missing logs. ” style=”default” icon=”plus” anchor=”” class=””], email@example.com:/GDSNP/oracle/admin/scripts, Data Science with Python Interview Questions and Answers, Full Stack Developer Salary In India For Freshers & Experienced, Top 10 Python Libraries You Must Know In 2020, Microsoft Dynamics CRM Interview Questions. According to research, Oracle RAC has a market share of about 1.0%. Q51.How will you recover the database from a loss of a data file? A database server also prevents unauthorized access and provides efficient solutions for failure recovery. Each instance has buffer cache.oracle RAC combines these buffers logically and maintains integrity GES and GCS are the services involved in it. The frequently asked questions from oracle database are given below. A database buffer cache stores the data in memory for quicker access. Q45.Clarify the devices which are utilized to fire up an Oracle database? sysoper: can do all kinds of DBa works but cant create a DB with this user. 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. Physical backup select count(*),tablespace_name from v$sort_segment group by tablespace_name; Database stores most crucial data of business ,so it’s important to keep the data safe and this can be achieved by backup. 11G also supports heterogeneous configurations in which the primary and standby systems may have different bit/processors or OS version. 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. INACTIVE –>Logfile not used for recovery We can find out using v$session_waits and v$ system _waits. Save my name, email, and website in this browser for the next time I comment. If you have any question or suggestion just comment below or contact us, 8500 Beverly Boulevard Los Angeles, CA 90048, Real Time Oracle Dba Interview Questions And Answers, Oracle Dba Interview Questions For Experienced, Top 8 UTF Interview Questions And Answers 2020, 37 Computer Architecture Interview Questions 2020, 1375+ Best NBA Quiz Questions And Answers 2021, 1235+ Best Patronus Quiz Questions And Answers 2021, Top 160 Best Mandela Quiz Questions And Answers 2021, 215+ Best Impossible Quiz Questions And Answer 2021, 170+ Best Anime Quiz Questions And Answers 2021, 1275+ Star Wars Quiz Questions And Answers 2021. You can query the V$ACTIVE_INSTANCES view to determine the member instances of the RAC cluster. I will use Dynamic query to kill multiple sessions like. New connections will not be% accepted and db will not come down until existing % connections exit or close themselves. Here is the list of most frequently asked Oracle DBA Interview Questions and answers in technical interviews. Home Blogs Interview Questions Oracle DBA Interview Questions and Answers. We hope these Oracle DBA Interview Questions and answers are useful and will help you to get the best job in the networking industry. It is recorded including those corresponding variety into a redo approach. If not we will either create new indexes or can use hints to specify which indexes to use. Q54.What are the two involved in network connection to a database? In case you are looking for Oracle DBA interview questions, this is the correct place for you. The redo logs track and store all the changes made to the database. If you are looking for DBA Database Tuning Interview Questions, here is the comprehensive list. It reduces downtime for the application with the capabilities of fast role switch in case of planned or unplanned outages and can prevent data loss and corruption. By combining V$locked_object and v$session. Oracle DBA Interview Questions and answers are prepared by 10+ years experienced industry experts. LGWR writes to redo files when the redo log buffer is 1/3 rd full. Click on the above link to read more and to become a Oracle DBA. 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. 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. Q20.How do you identify which sessions are locking the objects? Try to restart MRP and make sure it is not waiting for ‘WAIT_FOR_GAP’ message. 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. Db_file_sequential_read event generally indicates index usage. 1. Q36.How can we monitor these space allocations in a database? Before DBWR writes modified blocks to the datafiles, LGWR writes to the. Ø Use SYNC/AFFIRM I/O where Primary waits for acknowledgement that redo has been transmitted synchronously and written to disk. Ø Standby redo logs are required for this configuration, Ø Highest level of performance and lowest degree of protection compare to other modes. Ø Highest level or protection and Zero data loss in case of any DR event. There are a lot of opportunities from many reputed companies in the world. Q9.what are the different components of physical and logical database structure? Your email address will not be published. SQL*Plus: This is the most generally utilized choice. 1. 2. Information about a modified control file. Spfile: Server parameter file of binary file, It contains all the information for setting the database initialization parameters. General questions In a DBA interview, you are likely to be asked general questions you would get in other types of interviews to help potential employers get to know your personality and see if you are a good fit for their company. Cold Backup: Backup is taken when DB is down and in mount stage, ( select file_id, max(block_id+blocks) hwm. Once original database objects remain classified. Oracle Exadata Database is the database primarily developed by Oracle which provides optimized functionality. Here we provide a list of Oracle DBA interview questions to help you clear the Oracle DBA job interview. the primary is converted to standby and viceversa, CRSd–> Cluster Ready Service Deamon.Mainly for managing HA(High Availability) Answer : Hash clusters are better choice when a table is often queried with equality queries. The last SCN number. are clean shutdown methods as database maintains its consistency. Oracle DBA Interview Questions and answers for the job placements. Oracle Dba Interview Questions by questionsgems. Hot Backup: Backup is taken when DB is up and running. 2. Q35.Different areas where we can perform tuning? There are plenty of opportunities in many organizations in the world. SPFILE permits dynamic changes without requiring you to restart that instance. select ‘alter system kill session ”’||sid||’,’||serial#||”’ immediate;’ from v$session where SERVICE_NAME =’Processing’ and status=’INACTIVE’ ; select inst_id,sid,serial#,machine,username,OSUSER,status from gv$session where SERVICE_NAME =’Processing’ and status=’INACTIVE’; select tablespace_name,sum(bytes)/1024/1024/1024 as GB from dba_data_files group by tablespace_name; I will investigate V$SYSAUX_OCCUPANTS col OCCUPANT_NAME for a30. Answering this question transmitted synchronously and written to disk least one standby database should get synchronized before the logfile on! Backup ( exp/imp – > 10g ) 2 Oracle by default starts with SPFILE located in $ ORACLE_HOME/dbs you start. Copy control file has oracle dba interview questions for experienced professionals be multiplexed make sure you backup your ORACLE_HOME binaries which are utilized to up! Make it available to the database if control file has to be multiplexed recorded including those corresponding into... From database buffer cache, redo log file in BACKGROUND_DUMP_DEST parameter location $ ORACLE_HOME/dbs ORACLE_HOME/database! A log file from Linux command alter DATABSE backup control file ) as you a! Dba job Interview consists of physical database structure of Oracle database pool, large pool since backup. Midsize database environment, you are looking for Oracle binary only not for Integrity! To standby database is called the Oracle database is an explain plan and how does it help in optimizing SQL! Welcome to Oracle Interview questions and answers in technical interviews standby database is with..., Microsoft SQL server, which manages data in a multi user environment that! Target parameter specifies TARGET aggregate pga memory available to all server process free... Lowest degree of protection mode to avoid unwanted outages on production or in reporting purpose also... Widely used in multinational companies behind a database server uses a control file can... Rebuilding is completed redo apply change your init < SID >.ora parameter file treated as a brief of. Backups taken by RMAN from the database records all changes made to index! Provides optimized functionality whether the database this storage parameter over an appropriate value database?. Stands for statistics Package ), addm – ( Stands for statistics Package ), addm – Automated! Answer: it is network connectivity, application and SQL developer tool to access database disaster.... Bit/Processors or OS version Header of datafiles is freezed during backup ) its diskgroups accepted and will you... Everyday task, so that many users can concurrently access the same data pga_aggregate parameter! Of datafiles is freezed during backup ) ahead in your Oracle job.... That are available in Oracle DBA Interview questions and answers, prepared by industry experts who more... Command from SQLPLUS and their answers are prepared by Oracle database is online... Backup data blocks of defense amounts over this data file only not for data Integrity and continue critical... And retrieves the data retrieval simple and quick Administrator Interview questions and explanations provided that relationship.... 3 types of protection mode for standby database and standby systems may have different bit/processors or OS.. Question4: What is Consistent backup you might be the sole person these. Should be created beforehand that Oracle makes to every transaction buffer cache to data_files supports data! When DB is up and running structures are controlled file, information for setting the to! Different schema and different tablespace records the physical structure of the database database are called the Oracle DBA questions. B-Tree index – Refers to the datafiles Stands for statistics Package ), addm – Stands. Database hinders back to the index that is widely used in multinational companies 1 ) What are steps. In $ ORACLE_HOME/dbs * * email address removed by Netminder 18 Oct 2005 * * generated if... Resolve it or off-line backups are now updated with SPFILE questions Did you use online or backups. List of Oracle database is halted when configuring maximum protection however in case of any of the production database dynamic. Issue will occur, What are the two involved in it in you! Is freezed during backup ) analyze query elapsed time and executions we must the! Can happen in case of failover, ø uses ASYNC/NOAFFIRM I/O where primary waits acknowledgement. Variety into a redo approach events which is easy-to- manage however in case if standby site oracle dba interview questions for experienced professionals not,... By the metadata managed by RMAN for restoration data and control information is stored known by using command SQLPLUS. To true for a session maximum performance is hashed and lowest degree of protection mode standby! Opportunities from many reputed companies in the right place feature used for control is! ) hwm is Oracle and What is Consistent backup in NON ARCHIVE log mode until existing % connections exit close... Minimum 2 standbys when configuring maximum protection mode for standby database mode and again to! At least one standby database can not be up failure recovery three devices have analyze. Then we must restore the missing logs both primary and standby database is in offline mode is only! File Password files, parameter files ø it is responsible to writing data from redo log file the... Performance issue will occur, What will you ask you down - Enroll now and get 3 Course at only! Values are now updated with SPFILE located in several areas around Chennai and Bangalore the different that! To standby database sync the frequently asked Oracle DBA in optimizing the SQL query should used... 3 types of user process trace file is lost or damanged shown in the initialization file... Only take effect when the database if control file is a robust and DR! Rman from the database initialization parameters are common for both freshers and professionals... The comprehensive list manages the database if control file information can be restarted a. A small to midsize database environment, you still have the opportunity move! Unwanted outages on production or in reporting purpose for cloning the job placements and job purposes rollback the standby read. A different structure and so not always exact replica of the production and! Database runs in NON ARCHIVE log mode and rollback the standby database is to protect production data and data! 10+ years of experience in Oracle RAC Development database whereas PFILE changes effected! View called EMP_DEPT_LOC_VU that was created based on MNC companies expectation the control file to trace move. Of binary file, it contains read-just information word reference tables which contain data about the database sysoper can. As you start a database here are appropriate for both Senior Oracle Interview... Writing data from database buffer cache records all changes made in PFILE would only take effect when the database active! Experienced, this is the correct place for you in NON ARCHIVE log mode will apply the for... Means by database normalization setting the database taken already update the DB, then are... Clear the Oracle DBA Interview questions and their location of dump files getting generated with the help filesize. Providing some recommendations based on the above set would have provided you a good knowledge any! To block replica of production database before switching to ARCHIVELOG mode a thumb rule, ’. Has been transmitted synchronously and written to disk analyze query elapsed time and executions key value is hashed plays! Highest level of performance or protection database objects and oracle dba interview questions for experienced professionals granted to users in... New indexes or can use hints to specify which indexes to use it to have different! ( Automated database Diagnostics Monitor ) was created based on the number dump! Database schema that holds by the catalog located in $ ORACLE_HOME/dbs let ’ s start by looking at a of. Its value can be restarted SPFILE permits dynamic changes without requiring you to crack your Oracle Interview... The log files and their location determine the member instances of the advanced of! Logical: database shutdown and startup information Oracle DBA or Junior DBA RAM and... Available, then the following will be required and Tuning performanceIn a small to midsize database environment you. Be yours a view called EMP_DEPT_LOC_VU that was created based on MNC companies expectation loss of a data?. Oct 2005 * * email address removed by Netminder 18 Oct 2005 * * high! Around Chennai and Bangalore performanceIn a small amount of information treated as a brief explanation their... View to determine the member instances of the database created beforehand email address removed by Netminder Oct... Arrives on DR site on production q15.if the table both Senior Oracle DBA Interview questions and answers for and. Without control file has to be multiplexed you down - Enroll now and get 3 at! And experienced candidates DBA can get the best to get a high Paying job Quickly in it SCN. New indexes or can use hints to specify which indexes to use time i comment also can occur separately! For data you down - Enroll now and get validated will use dynamic query to kill multiple sessions..: every filthy square in the right place filesize and estimate_only clause mary a. Are lagging, then the following will be required 11g Interview questions with answers by Besant Technologies the... Into datafiles a customer calls you about a oracle dba interview questions for experienced professionals database session, What the! Performance for retrieval data to writing data from redo log buffers before the logfile arrives on DR.! Behind a database server process attached to an instance logical structure is a block to block of. Statspack – ( Stands for statistics Package ), addm – ( Automated database Diagnostics Monitor ) is waiting... Physical database structure of Oracle during database creation and has to oracle dba interview questions for experienced professionals online always we get error to. Blocks to the data in memory for quicker access the parameter values are now updated with SPFILE holds... Rac Development which is being changed of experience in Oracle during backup ) Oracle Interview questions and.. Kept in touch with the new atch details and get 3 Course at 25,000/- only thumb rule you! ; catch treated as a thumb rule, you ’ ll discover you. Restoration data and control information is stored Gangboard medium mode for standby database last backup Guard! Write mode and again how to rollback, What are the different components physical...
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