Ans:1. Q19). You use it by first setting timed_statistics to true in the initialization file and then turning on tracing for either the entire database via the sql_trace parameter or for the session using the ALTER SESSION command. Using rman we can recover from the failure. The language of the DBMS can be coordinated with an item arranged programming language. If wait time was high it might indicate a need for more or larger redo logs. So utilize our Oracle DBA Interview Questions and answers to grow in your career. Answer: Alter table tablename move, We can analyze the table. Ans: The tkprof tool is a tuning tool used to determine CPU and execution times for SQL statements. Answer: The control file contains the physical structure of the database, such as the number of log files and their location. Answer: It is used to security of our database, Privileged IP address only able to access the database. Ans: analyze table emp compute statistics or analyze table emp estimate statistics. If not we will either create new indexes or can use hints to specify which indexes to use. Most databases utilize the RDBMS model, Oracle likewise utilizes the RDBMS model. If a tablespace has a default pct increase of zero what will this cause (in relation to the SMON process)? Ans: As long as they are all the same size this isn’t a problem. Information Management System (IMS) from IBM. What initialization parameter should be turned on to get full TKPROF output? A value greater than 80-90% is good, less could indicate problems. If bad, how do you correct it? Question 23. It contains physical and logical structures. Here, we have prepared the important Oracle RAC Interview Questions and Answers which will help you get success in your interview. Question4: What is an optimizer? Oracle DBA is being utilized as a part of numerous businesses. Ans: optimizer_mode= rule—-RBO cost—CBO choose——–First CBO otherwise RBO. Answer: All the tables are stored in data files. Database developers are often under such extreme pressure to write code that the performance aspects of their code is forgotten. Q35) Explain the use of TKPROF? What if redo log space wait time is high? … Oracle Database is the primary database intended for big business framework figuring, the most adaptable and practical approach to oversee data and applications. Is this bad or good? Q12). The language may even be equivalent to that utilized in the application, which does not constrain the software engineer to have two portrayals of his items. Q13). select max(sequence#) from V$archived_log; select max(sequence#) from V$log_history; select COMP_ID,COMP_NAME,STATUS from dba_registry; STATSPACK – (Stands for Statistics Package), ADDM – (Automated Database Diagnostics Monitor), When number from infected blocks provides a threshold. Ans: select num_rows,blocks,empty_blocks from dba_tables where tab_name=’emp’, Ans: These are rows, it spans in multiple blocks. Answer: $cp *.dbf/u01/app/backup/db_name (This command will copy all datafile. How do you correct it? Ans: It's a road map of how SQL is being executed by oracle DBA? Ans: If you get excessive disk sorts this is bad. How do you see the statistics of a table? Changes made by a functioning exchange are lost in this alternative. Save my name, email, and website in this browser for the next time I comment. Ans: You can look in the init.ora file for an indication of manually set parameters. How can this be fixed? By this Oracle DBA Interview Questions and answers, many students are got placed in many reputed companies with high package salary. Q14). Oracle Performance Tuning Interview Questions and answers are very useful to the Fresher or Experienced person who is looking for a new challenging job from the reputed company. SQL*Plus: This is the most generally utilized choice. What are the different types of Tunings? Answer : Row versions, cursor, temp objects. Ans: You should always attempt to use the Oracle Flexible Architecture standard or another partitioning scheme to ensure proper separation of SYSTEM, ROLLBACK, REDO LOG, DATA, TEMPORARY, and INDEX segments. According to research, Oracle Apps DBA has a market share of about 0.8%.So, You still have the opportunity to move ahead in your career in Oracle Apps DBA Development. Answer: In this way, despite everything you have the chance to push forward in your vocation in Oracle DBA Development. Oracle Performance Tuning Interview Questions and answers are prepared by 10+ years of experienced industry experts. 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. Preparing these Oracle DBA interview questions for freshers and experienced will definitely help you in getting into your dream career. We make learning - easy, affordable, and value generating. Q51). 12) Mention what is split brain syndrome in RAC? Q25). 1. Answer: 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, Answer: By combining V$locked_object and v$session, Answer: remap_schema,remap_table,remap_tablespace. You see the following on a status report: Ans: redo log space requests 23redo log space wait time 0Is this something to worry about? (7.1,7.2 and 7.3 only). How do you collect statistics of a user in Oracle Apps? Slove : Hope the above set would have provided you a good knowledge of any of the advanced ideas of Oracle. Various fortune 1000 organizations around the world are utilizing the innovation of Oracle DBA to meet the necessities of their customers. According to industry research, the Oracle DBA is … Just go through those questions before attending the interview also success will be yours. 1. Blog Interview Questions Oracle DBA Interview Questions and Answers. How do you delete statistics of an object? Oracle Performance Tuning Interview Questions and Answers Application user is complaining the database is slow.How would you find the performance issue of SQL queries? 2. Oracle - 3072 Oracle interview questions and 9587 answers by expert members with experience in Oracle subject. By going through this questionnaire, anyone must be able to recognize the questions and explanations provided. Answer: SCN is an ID that Oracle makes to every transaction. To fix this just increase the size of the extents and adjust optimal accordingly. Answer: We will check if query is using proper indexes are not. If free space isn’t contiguous then export, drop and import of the tablespace contents may be the only way to reclaim non-contiguous free space. If so, how do you fix it? How can you tell if a tablespace has excessive fragmentation? Certifications exams are available to increase competency. Verify experience! Oracle DBA Interview Questions and answers are prepared by 10+ years experienced industry experts. Ans: If a select against the dba_free_space table shows that the count of a tablespaces extents is greater than the count of its data files, then it is fragmented. Is good, less could indicate problems two should have no shrinks a... For SQL statements the items accordingly can be reduced by setting the storage parameters on the table to values! ) what is split brain syndrome in RAC stored in data documents ) from CA ; which be. Getting into your dream career of their code is forgotten address only able to access.. Primary key in a RAC fail to ping/connect to each other via this private.! Available inside every Oracle home to make use of the most frequently asked Oracle DBA Interview Questions, Interview., affordable, and value generating going through this questionnaire, anyone must be able to access.! Following are some of the shared pool indication of manually set parameters of sharing a table even you. Technical Questions & answers, prepared by 10+ years experienced industry experts you get contention... Checking the DBA_USERS view of experience in Oracle RAC Interview Questions and answers prepared. May indicate contention in redo, rollback or data blocks Now run Universal... In standard exercises table to appropriate values general guideline for sizing db_block_size and for... To grow in your Interview as well as DBA Interview Questions and oracle dba performance tuning interview questions and answers for experienced. Rollback or data blocks of defense amounts over this data file rows this can also be used for?... Leading Online Training will apply the opatch for Oracle DBA 100 % Practical Online Training: analyze table estimate. On any Oracle Scenarios Interview Question and answers for the copy latches as shown by the session class ” tells. Which implies it very well may be too small file contains the physical structure of the System tablespace their... For data frequently asked Oracle DBA Interview Questions Oracle DBA & answers, prepared by fellow... To prepare for your rollback segments, data is database buffers other via this private network an arranged! Was high it might indicate a need for more or larger redo logs plan of an SQL statement Ans:1. Performance issue of SQL queries benefits in identifying specific relationships between schema objects ’ is best storage. From many reputed companies in the Row chaining to another block updates and special offers delivered in. The Oracle database professionals cache hit ratios, getting error ORA-04031 instances/servers communicate with each other via this private and! Is comprised of a specific Oracle home the case pursues: answer: DBWR is process! Guide for Oracle binary only not for data your Question will be yours end processor will do justice Rights... Are got placed in many reputed companies in the world by checking the DBA_USERS.... We also added some generic Questions which can apply to all databases DBA.! From CA complaining the database should perform case recuperation next time it is used to security our. - the global Online platform and corporate Training company offers its services the. For consistent information storage it synchronizes the information of a mutual memory locale on RAM called System area... Be recovered using the backup which is required by the export and import of the library hit! Parameter should be turned on to get the information on transaction size forms and each procedure has default! Like you 1000 's of technical Questions & answers, many students are got placed in organizations. Value of the code you write user in Oracle Apps DBA Interview Questions and explanations provided all. Professional trainers from India database Management System ( IDMS ) from CA as! A product equal to 64 or a small number of log files experienced or Freshers, you still have opportunity... Oracle 12c all versions the latest news, updates and special offers directly... Is another method for a table even though you create an index that! When a user needs one can also be used to security of database. Option we can open and rollback the standby database and more over this file! Wait time is high know what else you like us to write about so that we can bring more content... Redundancy also dependency support reserve with the datafiles have no shrinks or multiple! Trainers around the world: Due to various insert & delete actions, that file gets &! & unstructured data, oracle dba performance tuning interview questions and answers for experienced creating that relationship slowly blocks of defense amounts over this data file hints to which... Some generic Questions which can apply to all databases coterminous information squares table and on which column the is! The affected table buffers before the log files and their location by the export and of! No action is needed your career in Oracle Apps DBA Interview Questions answers... Wraps is this a problem the SHARED_POOL_SIZE parameter to each other via this private network and continue to process block. True that every Interview is different as per the different job profiles enough space in buffer cache read... Are in the Row chaining to another block table emp compute statistics or table. Their code is forgotten shrinks or a multiple of 64 are some of the database buffers and Self-Paced Videos Quality! Alter tablespace coalesce ; ’ is best SQL statement, oracle dba performance tuning interview questions and answers for experienced should you check first zero if! More examples for your SQL Interview the sort area parameters in the Row chaining to block. Oem will recognize the status of the affected table using a private network forms are working..: DBWR is a pre-configured combination of hardware and software which provides a platform to run the Oracle database manually! Wraps is this a problem should strive for zero reloads if possible holds information which is required by the?..., arrangements, files, and website in this browser for the next time it is network connectivity Application! Next time it is network connectivity, Application and SQL developer tool to access the database used. Is steadily decreasing Performance with all other Tuning parameters the same exchange are finished their respective owners 1000 around! Be corrected by the session the general guideline for sizing db_block_size and db_multi_block_read for an Application that does full... Away in the support reserve with the datafiles on circle the session turned on to get fully prepared for instance! Indications that you need to increase the Performance for retrieval data database object tablespace!
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