DBMS
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Programming
Technical
Describe the three levels of data abstraction?
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- physical level- describe how the data are stored
logical level-describe what data are stored
view level-describe only the part of the entire database - 9 years agoHelpfull: Yes(3) No(0)
- PROCESSES RESIDING IN MEMORY BUT THAT HAVE NOT BEEN ALLOCATED CPU ARE SAID TO BE IN READY QUEUE
- 10 years agoHelpfull: Yes(2) No(0)
- physical level
logical level
view level - 9 years agoHelpfull: Yes(2) No(0)
- when the processes which is kept in the queue to execute their process in the critical section is called ready queue.
- 11 years agoHelpfull: Yes(1) No(1)
- the process which need cpu to execute or kept in this queue . and They will be fetched from disk and loaded into main memory. and the process will wait for their time to get cpu
- 10 years agoHelpfull: Yes(1) No(0)
- Here n is nth maximum salary n could be 1 2 3 4
Select distinct sal from emp a where &n=(Select count (distinct sal) from emp b where a.sal - 9 years agoHelpfull: Yes(0) No(0)
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