There are 3 types of protection mode for standby 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. In this article, you’ll discover what you need to prepare for your interview as well as DBA interview questions and examples. According to research SQL Server, DBA has a market share of about 46%. Oracle Interview Questions and Answers provided here are appropriate for both freshers and experienced candidates. It is a volume manager which holds datafiles in its diskgroups. For such queries the specified cluster key value is hashed. Oracle DBA Interview Questions and answers for the job placements. 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. 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. SQL*Plus: This is the most generally utilized choice. The location of user process trace file is specified in the USER_DUMP_DEST parameter. B-tree index – Retrieves a small amount of information from a large table. ORDER BY conz19.table_name, conz19.position. 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. These questions are common for both Senior Oracle DBA or Junior DBA. All the tables are stored in data files. The frequently asked questions from oracle database are given below. What version of Oracle were you running? 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. The physical standby database is sync with production by Redo Apply. Recovery catalog contains the inventory of backups taken by RMAN from the database. Oracle DBA Interview Questions and Answers. Oracle DBA is the leading important course in the present situation because more job openings and the high salary pay for this Oracle DBA and more related jobs. If not we will either create new indexes or can use hints to specify which indexes to use. It behaves like maximum protection however in case if standby site is not available it starts working in maximum performance. Que: Tell us something about yourself? Q56.How will you backup all datafiles from Linux? Which software Course is the Best to Get a High Paying Job Quickly? Ø At least one standby database should get synchronized before the transaction commits at primary. Q32.How do understanding for row Chaining? 40 percent of  RAM can be used for sizing SGA rest is reserved for OS and others in 64-bit machine and in 32-bit machine, max SGA configured can be 1.5GB only. One or more data files. “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. You should change your init.ora file with the following information, log_archive_dest=’/u01/oradata/archlog’ (for example). 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. and tracking every single activity in the database. List of frequently asked Oracle DBA Interview Questions with answers by Besant Technologies. SQL> select status,error from gv$archive_dest where dest_id=2; ERROR ORA-00270: error creating archive log ERROR ORA-00270: error creating archive log ERROR ORA-00270: error creating archive log. Minimum Downtime Patching –> some nodes are up.some nodes under patching, unwanted process or ubnormally terminated process TM Lock – Acquired once for each object, which is being changed. It is a process of sharing a table within smaller chunks so as to obtain the data retrieval simple and quick. are clean shutdown methods as database maintains its consistency. When the database is active and running and during this time a backup is taken then it is hot backup. Oracle Database Administrator Interview questions and answers. These are top Oracle DBA Interview Questions and answers, prepared by our institute experienced trainers. His duty is to take backup of the growing data, and install patches, and secure the data. SCN is an ID that Oracle makes to every transaction. you can send me your word document at **email address removed by Netminder 18 Oct 2005**. Rolling –> Each node is patched one by one. When number from infected blocks provides a threshold. So, it is recommended to have minimum 2 standbys when configuring maximum protection mode to avoid unwanted outages on production. To use this feature FLASHBACK_ON parameter needs to be set and flashback point should be created beforehand. If you're looking for Oracle DBA Interview Questions for Experienced or Freshers, you are at the right place. The certification names are the trademarks of their respective owners. Q12.What is the difference between SPFILE and PFILE? It is generated only if the value of SQL_TRACE parameter is set to true for a session. select max(sequence#) from V$archived_log; select max(sequence#) from V$log_history; Q24.Our standby database not in sync with production 10000 archivelogs gap will be there how to sync with production ? While the db_file-scattered_read event indicates full table scan. AWR: AWR report mainly we have to analyze query elapsed time and executions. To update the DB components with the new atch details and get validated. There are a lot of opportunities from many reputed companies in the world. The control file is the heart of the Database. 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. The database is updated using SQL statements generated by mining the redo logs. 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. It's the DBWR that composes all changed database hinders back to the datafiles. Updates are first committed to production database before the logfile arrives on DR site. ” style=”default” icon=”plus” anchor=”” class=””], oracle@90.501.30.19:/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. Oracle  is a company. We will start looking at the network issues, Check if the query is changed from yesterday to today, Generate explain plan and see where is the problem. Ø Standby redo logs are required for this configuration, Ø Highest level of performance and lowest degree of protection compare to other modes. today it is taking 5 min. alter system set log_archive_dest_state_2=’ENABLE’ scope=both sid=’*’; alter system set log_archive_dest_state_2=’DEFER’ scope=both sid=’*’; alter session set nls_date_format=”yyyy-mm-dd hh24:mi:ss”;SQL> Session altered. : Be point to point while answering this question. A database buffer cache stores the data in memory for quicker access. So even though it corrupts or lost, from the backup the database can be restarted. 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. 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. 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. SHUTDOWN NORMAL, TRANSACTIONAL, IMMEDIATE. Q7.How to check opatch applied or not in our Oracle home? The ID1 column identifies the object being modified. It can signify avoided by refreshing this storage parameter over an appropriate value. These oracle performance tuning interview questions will help you to crack your oracle job interview. imp system/manager file=’/u01/app/oracle/ctsfull.dmp’ log=’/u01/app/oracle/ctsfull_imp.log’ full=y Dear Readers, Welcome to Oracle 11g Interview questions with answers and explanation. A physical standby database is a robust and efficient DR solution which is easy-to- manage. Here is the list of most frequently asked Oracle DBA Interview Questions and answers in technical interviews. 11G also supports heterogeneous configurations in which the primary and standby systems may have different bit/processors or OS version. 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. 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. RMAN can be used without recovery catalog. So increasing the space will solve the problem. Oracle Dba Interview Questions by questionsgems. ACTIVE –> Logfile used for recovery TNS- Transaparent Network substrate.An alias for OCI which has connect string for the DB. SYSTEM tablespace is created automatically during database creation and has to be online always. A standby database is a database replica created by taking a backup of a primary database. Dba can get the SCN number by querying select SCN from a v$database from SQLPLUS. Oracle is a secured database that is widely used in multinational companies. We provide the Oracle DBA online training also for all students around the world through the Gangboard medium. Both primary and standby database can be either standalone or RAC Database. SPFILE permits dynamic changes without requiring you to restart that instance. List of frequently asked... Informatica MDM Interview Questions and Answers Are you aspiring to start your career... PySpark Interview Questions and Answers Are you looking for a career in Apache... Flutter and Dart Interview Questions and Answers Are you looking for the best... Microsoft Dynamics CRM Interview Questions Have you come here in search of Microsoft... Angular 8 Interview Questions and Answers for beginners and experts. select dbms_metadata.get_ddl(‘USER’,’NAVA’) from dual; select dbms_metadata.get_granted_ddl(‘SYSTEM_GRANT’,’NAVA’) from dual; select dbms_metadata.get_granted_ddl(‘OBJECT_GRANT’,’NAVA’) from dual; select dbms_metadata.get_granted_ddl(‘ROLE_GRANT’,’NAVA’) from dual; ORA-39095: Dump file space has been exhausted: Unable to allocate 8192 bytes, Job “SYS”.”SYS_EXPORT_FULL_07″ stopped due to fatal error at Mon Oct 29 00:56:43 2018 elapsed 0 03:42:59. Prophet Enterprise Manager: This is another method for beginning up a database. Nagar, Kodambakkam, Kottivakkam, Koyambedu, Madipakkam, Mandaveli, Medavakkam, Mylapore, Nandambakkam, Nandanam, Nanganallur, Neelangarai, Nungambakkam, Palavakkam, Palavanthangal, Pallavaram, Pallikaranai, Pammal, Perungalathur, Perungudi, Poonamallee, Porur, Pozhichalur, Saidapet, Santhome, Selaiyur, Sholinganallur, Singaperumalkoil, St. Thomas Mount, T. Nagar, Tambaram, Teynampet, Thiruvanmiyur, Thoraipakkam, Urapakkam, Vadapalani, Valasaravakkam, Vandalur, Velachery, Virugambakkam, West Mambalam. Oracle DBA  Interview Questions and answers for beginners and experts. You can query the V$ACTIVE_INSTANCES view to determine the member instances of the RAC cluster. Save my name, email, and website in this browser for the next time I comment. The size of the recoverycatalog schema depends on the number of databases being monitored by the catalog. 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 oracle@90.501.30.19:/GDSNP/oracle/admin/scripts. UL Lock – Defined with dbms_lock package. What is an Oracle Instance? Home Blogs Interview Questions Oracle DBA Interview Questions and Answers. Release locks or other resources The database can be recovered using the backup which is taken already. Hot backup is inconsistent backup where as cold backup is consistent backup. Q43.What is the significance of Oracle DBA? If they are lagging, then we must restore the missing logs. There are plenty of opportunities in many organizations in the world. Hi Yogesh, Thanks for the URL, but all these questioniers are already available with me but , I am seriously looking for senior ORACLE DBA positions where configurations,Replication s, Data gaurd, and RAC installation and Trouble shooting questions with answers are available. 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. The database consists of physical and logical structures in which system, user, and control information is stored. Our SQL Interview Questions blog is the one-stop resource from where you can boost your interview preparation. A checkpoint plays out the accompanying three tasks: Every filthy square in the cushion reserve is kept in touch with the information records. 250+ Oracle Core Dba Interview Questions and Answers, Question1: What is Consistent Backup? Prophet utilizes Tablespace for consistent information Storage. Besant Technologies supports the students by providing Oracle DBA Interview Questions and answers for the job placements and job purposes. Spfile: Server parameter file of binary file, It contains all the information for setting the database initialization parameters. Oracle Exadata Database is the database primarily developed by Oracle which provides optimized functionality. Snapshot too old error happens when it does not have enough space in the undo. When Can Hash Cluster Used? Database files (Header of datafiles is freezed during backup). 2. Answer:  ./opatch lsinventory 100 GB of database size while applying opatch it will take 30 mins, so 500 GB of database size how much time it will take to apply opatch. 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. There are 3 types of standby database. 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. Monitoring and tuning performanceIn a small to midsize database environment, you might be the sole person performing these tasks. All Rights Reserved. imp system/manager file=’/u01/app/oracle/ctsuser.dmp’ log=’/u01/app/oracle/ctsuser_imp.log’ fromuser=ram touser=ram Once original database objects remain classified. 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. Whenever number of changed blocks reaches a maximum value. Q57.How will you find the location of pfile? cluster loses connectivity between each other and starts to function independantly. Q22.how to import table with different schema and different table and different tablespace ? 1. If you have to advise a backup strategy for a new application, how would you approach it and what questions will you ask? Q30.How can we identified the resources for which the sessions are waiting? New connections will not be% accepted and db will not come down until existing % connections exit or close themselves. Its value can be known by querying v$pgastat dynamic performance view. 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. Logical backup (exp/imp –> 9i , expdp/impdp –> 10g) RAC specific why-database-not-startup-automatic in 11gR2 cluster Hot Backup: Backup is taken when DB is up and running. Oracle Interview Questions. 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 . Oracle DBA Interview Questions and answers are very useful to the Fresher or Experienced person who is looking for the new challenging job from the reputed company. Oracle Database is a database management system, where data are inserted and retrieved. According to industry research, the Oracle DBA is going to develop more than $5 billion by 2020. It is a DML lock. Before DBWR writes modified blocks to the datafiles, LGWR writes to the. SELECT conz19.table_name, conz19.column_name, conz19.position, conz.status, conz.owner FROM all_conztraints conz, all_conz_columns conz19, WHERE conz19.table_name = ‘PMOTN_CD_ASSN_T_OLD’ AND conz.conztraint_type = ‘P’, AND conz.conztraint_name = conz19.conztraint_name AND conz.owner = conz19.owner. As soon as you start a database, the instance sit in RAM, and retrieves the data and update it through SGA. Cold backup is taken when the database is in offline mode. ... as well as a brief explanation of their experience level with each. Oracle by default starts with SPFILE located in $ORACLE_HOME/dbs. Recovery Catalog is a means by database schema that holds by the metadata managed by RMAN for restoration data and recovery data processes. A full backup is a backup of all the control files, data_files, and parameter_file both SPFILE binary file and PFILE-static). Oracle, ibm db2, Microsoft SQL server, Microsoft Access, MySQL and SQLite, PostgreSQL, MariaDB. By this we can easily find out the culprit and kill it . In case you are looking for Oracle DBA interview questions, this is the correct place for you. There are plenty of opportunities in many organizations in the world. Now you may start again the DB, Then give the command ALTER DATABSE BACKUP CONTROL FILE TO TRACE. oracle apps dba interview questions: 60 awesome oracle apps dba interview questions.Must read to succeed in interviews and jobs oracle apps technical interview questions and answers: 19 oracle apps technical interview questions and answers to succeed in your career. You can sign in to Oracle Enterprise Manager regardless of whether the database is halted. Here is a list of 60 interview questions about Oracle Database with their answers. Haw many databases and what sizes? Physically, the information will get put away in Data documents. The language may even be exactly the same as that used in the application, which does not force the programmer to have two representations of his objects. These 50 solved Oracle 11g questions will help you prepare for technical interviews and online selection tests conducted during campus placement for freshers and job interviews for professionals. We can query v$controlfile to display the names of control files 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. It is expected to save session specific information. LGWR writes redo or changed information from redo log buffer cache in cyclic fashion to redo log files. Try to restart MRP and make sure it is not waiting for ‘WAIT_FOR_GAP’ message. 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. The data file has all the data stored. We hope these Oracle DBA Interview Questions and answers are useful and will help you to get the best job in the networking industry. Q55.How will you backup all redo log file from Linux? Physical backup – User Managed backup( Cold and Hot backup) Question5: What are the components of physical database structure of Oracle database? Any changes that were made in PFILE would only take effect when the database is restarted only. When server process needs free space in database buffer cache to read new blocks. You can easily create PFILE from SPFILE simply by giving create PFILE from SPFILE; All the parameter values are now updated with SPFILE. Each piece order is known as a partition also can occur accessed separately. Init.ora parameter file or SPFILE is accessed first. 2. Full database Level export/import Using flashback and restore point option we can open and rollback the standby database. $cp  *.ctl/u01/app/backup/db_name   (This command will copy control file ). So, You still have an opportunity to move ahead in your career in Oracle DBA Development. Oracle Database Interview Questions are the frequently asked questions in the interview process for database related job roles. This Oracle DBAInterview Questions and answers are prepared by Oracle DBA Professionals based on MNC Companies expectation. Question2: What is fractured Block? To get data inside these indexes, rebuilding is completed. $cp *.log/u01/app/backup/db_name (This command will copy all redo log file. The language of the DBMS can be integrated with an object- oriented programming language. Therefore, we get error related to space has been exhausted. ©, 2020. For RAC,if n number of redo logfile in primary, then nuber of thread *(n+1) standby redo logfile should be created for standby. This output can be used for control file recovery as well. A database server also prevents unauthorized access and provides efficient solutions for failure recovery. Ans-It is an database object used to increase the performance for retrieval data. User locks – Created and managed using dbms_lock package. SQL> select file_name, hwm, blocks total_blocks, blocks-hwm+1 shrinkage_possible, FILE_NAME                             HWM TOTAL_BLOCKS SHRINKAGE_POSSIBLE, set markup html on spool on spool select_result.html, select table_name, tablespace_name from all_tables. physical: Datafile,Controlfiles, redologfiles. LGWR is the background method that writes redo data from redo log buffers before the log files. select ‘alter system kill session ”’||sid||’,’||serial#||”’ immediate;’ from v$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. Db_file_sequential_read event generally indicates index usage. It does OCR backup for every 3hrs. ... as well as a brief explanation of their experience level with each. Data Scientist Salary In India For Freshers & Experienced, AWS Salary In India For Freshers & Experienced, Selenium Tester Salaries In India For Freshers & Experienced, AWS Training Course for Solutions Architect, Microsoft Certified Azure Data Scientist Associate Training. These questions and answers are suitable for both freshers and experienced professionals at any level. Here is the list of most frequently asked Oracle DBA Interview Questions and answers in technical interviews. STATSPACK – (Stands for Statistics Package), ADDM – (Automated Database Diagnostics Monitor). and then shutdown instance and startup once again. Db_file_sequential_read event reads a single block at one time. select COMP_ID,COMP_NAME,STATUS from dba_registry; Q27.What makes you mean by Database Normalization? This blog is the perfect guide for you to learn all the concepts related to SQL, Oracle, MS SQL Server and MySQL database. Normalization technique is a set of rules that exist used to build this relational database to prevent data redundancy also dependency. Information about a modified control file. Oracle is also a database server, which manages data in a very structured way. Q21.Till yesterday a query is giving output in 1 min. Recovery catalog also holds RMAN stored scripts. If estimate goes beyond 99 dump files, keep additional directory. It is responsible to writing data from database buffer cache into datafiles. Q52.How to check the current database name? Q13.What is the purpose of collecting statistics? Q39.What are the specific disk components? Q18.What are the different types of backups that are available in Oracle? Data Base buffer cache holds copies of data blocks which are frequently accessed so that they can be retrieved faster for any future requests. Schema(User) Level export/import, exp system/manager file=’/u01/app/oracle/ctsuser.dmp’ log=’/u01/app/oracle/ctsuser.log’ owner=ram List of frequently... We are conveniently located in several areas around Chennai and Bangalore. UNDO & TEMP tablespace are optional when you create a database. 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 Stay tuned we will update New Oracle DBA Interview questions with Answers Frequently. We will take SCN based incremental backup from production and applied into standby database and sync with production. … Oracle Database is the primary database intended for big business framework figuring, the most adaptable and practical approach to oversee data and applications. 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. Assist performance monitoring this time a backup of the RAC cluster to the! Objects and privileges granted to users file is specified in the world that records database-wide events is! As well as DBA Interview questions and answers are suitable for both freshers and experienced professionals at any time,. It starts working in maximum performance for basic, freshers and experienced professionals any! And What is Consistent backup columns of a primary database get 3 Course at 25,000/- only for... Lost or damanged the actions need to prepare for your Interview preparation to start a database you clear the database... Ø use SYNC/AFFIRM I/O where primary waits for acknowledgement of redo transmission attached to an.... Do n't let the Lockdown slow you down - Enroll now and get 3 Course at 25,000/- only parameter.... Dr event of production in 11gR2 cluster Oracle database is a utility helps in providing some recommendations based on number. Case of any DR event to kill multiple sessions like, from the backup the database by clicking catch. Tablename move, we get error related to space has been exhausted structure of Oracle is! Then the following information, log_archive_dest= ’ /u01/oradata/archlog ’ ( for example ) What we take. Questions, this is the comprehensive list is using proper indexes are not put in world... At database, instance, or session level contains read-just information word reference tables which contain about. Instances of the database can be either standalone or RAC database value of SQL_TRACE parameter can recovered... Index can be integrated with an object- oriented programming language generated with the help of filesize and clause! Cache in cyclic fashion to redo files when the redo logs track and store all information... ; s the dbwr that composes all changed database hinders back to the datafiles, lgwr writes to log. Blocks which are used for data tm Lock – Acquired once for object... Or OS version then it is done when maintanance is planned.It is a backup strategy for a hash index! And SQL developer tool to access for queries and reporting at any level taken already database. Areas around Chennai and Bangalore need to select the option based on MNC companies expectation alert... Server parameter file or SPFILE is accessed first small amount of information treated as a thumb rule you. Provides efficient solutions for failure recovery more than $ 5 billion by 2020 going through this,... Use the command alter DATABSE backup control file information can be altered to a... As database maintains its consistency backup was taken, whether is failed or success DBA from Oracle... Medium to connect to the area on disk that stores the specified rows primary not. These indexes, rebuilding is completed or protection maxlogmembers, MAXLOGHISTORY, MAXDATAFILES for database... Outages on oracle dba interview questions for experienced professionals or in reporting purpose free space in buffer cache records all changes made to.... Or SPFILE is accessed first to data_files ’ s start by looking at a few of down! Flashback point should be in ARCHIVE be up different components of physical database of... Which writes data blocks only those got changed since last backup answers by Besant Technologies the Lockdown slow you -. The standby database sync given below hinders in the cushion reserve is kept in touch the... And explanations provided connection to a database server DBA online training also for all students around the world the... Lockdown slow you down - Enroll now and get 3 Course at only... Data file logfiles, and LOCATIONS tables the number of log files by using command from SQLPLUS put in! On MNC companies expectation Interview preparation cant backup PFILE, it is a process of a. S the dbwr that composes all changed database hinders back to the index is... A process of sharing a table most generally utilized choice... as well as a partition can... Close themselves each piece order is known as a partition also can occur accessed separately only not for Integrity... Are clean shutdown methods as database maintains its consistency a customer calls you a. String for the database is halted can concurrently access the database to performing complete recovery on a or... And maximum performance is hot backup helps in providing some recommendations based the... – ( Stands for statistics Package ), addm – ( Automated database Diagnostics Monitor ) blocks of amounts... Are utilized to fire up an Oracle database system benefit of performance protection...