What is a logical backup ?
Answers were Sorted based on User's Feedback
Answer / chaudhry
Logical backup involves reading a set of databse records
and writing them into a file. Export utility is used for
taking backup and Import utility is used to recover from backup.
| Is This Answer Correct ? | 43 Yes | 11 No |
Answer / vivek
Logical backup is a process of extracting data in the form
of SQL statements,where it is useful to recover in case the
objects ate lost.The main drawback of this backup is that MEAN
TIME TO RECOVER is high.
| Is This Answer Correct ? | 39 Yes | 11 No |
Answer / brajendra arzare
Logical backups are backups in which the export utility
(for example exp) uses SQL to read database data and then
export it into a binary file at the operating system level.
We can then import the data back into a database using the
import utility (imp).
| Is This Answer Correct ? | 18 Yes | 2 No |
What is database management system(dbms) and why it is used?
Explain degree of a relation?
Describe the differences between vertical and horizontal portioning.
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? IBM 1. What is virtual dataset? 2. How do you handle reject link to a peek stage? 3. What is transaction table? 4. Which one is the efficient from the following? a. ODBC enterprise b. Oracle enterprise 5. How can you extract data from excel sheet? Do you know how to parameterize, this option? 6. Six pages of complex query I have, how do you simplify this query? 7. Difference between dataset and lookup file set?
What are the two types of indexes and explain them in detail? Or what's the difference between clustered and non-clustered indexes?
What are the different types of database?
What are the differences between drop, truncate and delete commands?
how you will identify the mapping level bottleneck ? if there is a mapping level bottleneck then how will you try to improve the mapping
How to determine who is and change the owner of database?
What are the disadvantages of a query?
What is instance in dbms?
Explain the concept of acid properties in dbms?
Oracle (3259)
SQL Server (4518)
MS Access (429)
MySQL (1402)
Postgre (483)
Sybase (267)
DB Architecture (141)
DB Administration (291)
DB Development (113)
SQL PLSQL (3330)
MongoDB (502)
IBM Informix (50)
Neo4j (82)
InfluxDB (0)
Apache CouchDB (44)
Firebird (5)
Database Management (1411)
Databases AllOther (288)