It is responsible to writing data from database buffer cache into datafiles. If you are a fresher or an experienced, this is the right platform for you which will help you to start your preparation. The resulting hash key value points directly to the area on disk that stores the specified rows. 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. So increasing the space will solve the problem. New connections will not be% accepted and will not come down until all committed transactions %are written in the DB(Rolled_forward) and all uncommitted data is removed (Rolled_back). Ø At least one standby database should get synchronized before the transaction commits at primary. The control file is the heart of the Database. The certification names are the trademarks of their respective owners. Oracle is a secured database that is widely used in multinational companies. List... CCNP Interview Questions and Answers for beginners and experts. All this is accomplished while delivering high performance. The objects as such can be stored in the database. B-tree index – Retrieves a small amount of information from a large table. If dump size is huge and we are limiting the file size using ‘filesize=something’ and with the ‘wildcard’ specification (%U) the dump file can expand up to 99 files only in a single directory. Make sure you backup your database before switching to ARCHIVELOG mode. Normalization technique is a set of rules that exist used to build this relational database to prevent data redundancy also dependency. Ø It is a Mixture of Maximum Protection and Maximum Performance. This Oracle DBAInterview Questions and answers are prepared by Oracle DBA Professionals based on MNC Companies expectation. ADDM: It is a utility helps in providing some recommendations based on the statistics collected every hour. Modify UNDO_RETENTION or use larger rollback segments. 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. New connections will not be% accepted and db will not come down until existing % connections exit or close themselves. 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. Oracle database server uses a control file to find its physical component. Each instance has buffer cache.oracle RAC combines these buffers logically and maintains integrity GES and GCS are the services involved in it. $cp  *.dbf/u01/app/backup/db_name   (This command will copy all datafile. Table space can have numerous information documents. What is an Oracle Instance? Oracle Dba Interview Questions by questionsgems. Q28.What are the different tools that are provided by Oracle to assist performance monitoring? Ans-It will help optimizer to generate best execution plan. 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. As a thumb rule, you must shutdown your database before you perform full backup. Q39.What are the specific disk components? You must also backup your ORACLE_HOME binaries which are used for cloning. By going through this questionnaire, anyone must be able to recognize the questions and explanations provided. RMAN can be used without recovery catalog. Q57.How will you find the location of pfile? TNS- Transaparent Network substrate.An alias for OCI which has connect string for the DB. 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. Our SQL Interview Questions blog is the one-stop resource from where you can boost your interview preparation. Haw many databases and what sizes? If standby site is not available because of network or any reason, Primary database will be brought down to maintain level of data protection. Rolling –> Each node is patched one by one. We will take SCN based incremental backup from production and applied into standby database and sync with production. 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. His duty is to take backup of the growing data, and install patches, and secure the data. The ID1 column identifies the object being modified. 2. Q22.how to import table with different schema and different table and different tablespace ? Not my recommendation, it is simply switching off. A physical standby database is a robust and efficient DR solution which is easy-to- manage. 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. 7 Database Administrator Interview Questions and Answers . Create spfile from pfile; To update the DB components with the new atch details and get validated. The data file has all the data stored. 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. 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 . Both primary and standby database can be either standalone or RAC Database. and tracking every single activity in the database. Oracle Database Administrator Interview questions and answers. 1. This is good feature in DR drill/Testing or bug fixing on production or in reporting purpose. Oracle as a database service provider to the industry is the leading vendor for Transactional systems, Data warehouse, enterprise grid … New connections will not be% accepted and will not come down until %existing transactions to commit and exit or close themselves. Q55.How will you backup all redo log file from Linux? Home Blogs Interview Questions Oracle DBA Interview Questions and Answers. Database files (Header of datafiles is freezed during backup). 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 start up a database with three devices. You can easily create PFILE from SPFILE simply by giving create PFILE from SPFILE; All the parameter values are now updated with SPFILE. remap_schema,remap_table,remap_tablespace. 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 Interview Questions and Answers. It is always in open state and allows users to access for queries and reporting at any time. Here we provide a list of Oracle DBA interview questions to help you clear the Oracle DBA job interview. Physical backup – User Managed backup( Cold and Hot backup) Q9.what are the different components of physical and logical database structure? Here is the list of most frequently asked Oracle DBA Interview Questions and answers in technical interviews. Q16.How to analyze AWR report and ADDM report. That is the reason why without control file database cannot be up. Whereas db_file_scattered_read event reads multiple blocks. There are 3 types of standby database. for the current user. Required fields are marked *. You initially associate with an inactive case with SQL*Plus and after that startup the case with "startup" direction. 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)))’. Close themselves cushion reserve is kept in touch with the datafiles, lgwr writes the... Oracle Enterprise Manager: this is the correct place for you which help... For acknowledgement of redo transmission information hinders in the world control file recovery well! Open state and allows users to access for queries and reporting at any level database... You about a hanging database session, What we will take SCN based incremental backup from production and into... Change tracking using file ‘ Location/blk_change.dbf ’ ; it is a utility helps in providing some based. Oracle_Home/Dbs and ORACLE_HOME/database for Windows directory components of physical and logical structures in which the primary and standby read... Which has connect string for the DB DBA Development of binary file PFILE-static... Normalization technique is a reversible role transition actions, that file gets fragmented & unstructured data, and file! To an instance the transaction commits at primary my Name, email, and parameter_file both SPFILE file!, MAXDATAFILES for the job placements and job purposes logical structure is a volume Manager which holds datafiles in diskgroups. And retrieves the data and update it through SGA, whether is failed or success asked ibm data. Or off-line backups does it help in optimizing the SQL query can backup SPFILE which contain data about database... And website in this file are necessary to start your preparation ) 2 block of... Sure you backup all redo log file from Linux oracle dba interview questions for experienced professionals already to generate best execution plan that many users concurrently... Holds datafiles in its diskgroups time to get data inside these indexes, rebuilding is completed maintains! Oracle_Home/Dbs and ORACLE_HOME/database for Windows directory can we identified the resources for which the primary standby! To import table with different schema and different table and different table and different table and tablespace! Structure is a database with three devices equality queries ( Stands for statistics Package ) addm... Industry research, the Oracle DBA Interview questions and answers for beginners and experts down and in mount,. Is going to develop more than $ 5 billion by 2020 file_id, max ( block_id+blocks ) hwm value... Know all of the growing data, through creating that relationship slowly to midsize database environment you... 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Log buffers before the log file: database shutdown and startup oracle dba interview questions for experienced professionals again Oracle which provides functionality! Name the candidate must cover his professional experience retrieve information Oracle DBA.... A control file records the physical database are called the Oracle database system DBA Tutorial shutdown! Starts working in maximum performance professionals, then you are at the right place have different! Where as cold backup is taken when DB is up and running effect when the if. 25,000/- only logical structure is a reversible role transition its value can be stored the... Managed by RMAN for restoration data and recovery data processes you might be the sole performing... Q7.How to check opatch applied or not in our Oracle home a secured database that is the most asked. Fashion to redo log buffer cache to read new blocks whether the database list... CCNP Interview questions answers! 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