Databases Interview Questions, Answers for Freshers and Experienced asked in various Company Job Interviews

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Databases Interview Questions

Questions Answers Views Company eMail

Define Transaction ?

5 10830

When does a Transaction end ?

2 7646

What does COMMIT do ?

4 10786

What is SAVE POINT ?

5 9832

What is Read-Only Transaction ?

3 6738

What is the function of Optimizer ?

1 4588

What are the different approaches used by Optimizer in choosing an execution plan ?

2 5333

What are the factors that affect OPTIMIZER in choosing an Optimization approach ?

2 4870

What are the values that can be specified for OPTIMIZER MODE Parameter ?

1 4051

Will the Optimizer always use COST-based approach if OPTIMIZER_MODE is set to "Cost"?

1 4070

What is the effect of setting the value of OPTIMIZER_MODE to 'RULE' ?

1 4216

What are the values that can be specified for OPTIMIZER_GOAL parameter of the ALTER SESSION Command ?

1 4442

What is the effect of setting the value "ALL_ROWS" for OPTIMIZER_GOAL parameter of the ALTER SESSION command ?

1 4507

What is the effect of setting the value "CHOOSE" for OPTIMIZER_GOAL, parameter of the ALTER SESSION Command ?

2 4657

What is the effect of setting the value 'FIRST_ROWS' for OPTIMIZER_GOAL parameter of the ALTER SESSION command ?

1 4537

Un-Answered Questions { Databases }

1. Tell me about your self? 2. Latest Project Introduction? 3. Difference between server jobs and parallel jobs? 4. Seq-Seq Explain its behavior and execution mode and which parallelism technique is used? 5. What is padding characters? 6. Seq-Seq, Seq-Copy-Seq which one is the best and efficient? 7. How many reject links do we have to a transformer? 8. How many reject links to join stage? 9. Difference between join and lookup? 10. How to design PX routine? 11. How can we call job in another job? 12. Difference between batch and sequencer? 13. Which Database is used? 14. What is change capture? Give briefing of that? 15. What is change Code? Explain? 16. How you call UNIX in Ds? 17. How do you call JCL in UNIX? 18. How do you pass the job status of one job to another job? Have designed any job sequencer? 19. How do you find a file in existed directory? 20. How can you call parallel jobs in transformer? 21. Execution of jobs in command line? 22. Tuning of sql queries? 23. What is orchestrating metadata? 24. What are junk dimension? 25. What are the third party tools you are used? 26. What are the system variables you have used?

1903

what is the command syntax for inserting a document?

How to select all columns of all rows from a table in oracle?

1117

Can delete statement be rollbacked?

1049

How to convert numeric expression data types using the cast() function?

1142

define sql insert statement ? : Sql dba

1092

What are the steps in creating a database?

1002

What are the different types of subquery?

1227

Please send me Informatica 8.1 certification dumps, my mail id mona85gupta@gmail.com

1942

Which statement is used in a select query for partial matching?

1238

Is primary key clustered index?

1009

1. What is Container? 2. Tell me about your project? 3. Which container you are used in your project? 4. What is Surrogate key? 5. How you are implemented it? 6. Difference between Server job and Parallel job? 7. What is your Target Database? 8. What is Source System? 9. Difference between Join and Lookup? 10. Are you maintaining historical data? What is the logic used to maintained to historical data? 11. Do you have documents for mapping?

1841

What are the kinds of subquery?

1095

What are the two main functions of queries in databases?

1520

What are different types of constraints?

995

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