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4.deadlock is a state where the process gets blocked.
- rockstar December 23, 2011ex: when one process p1 request for resource r1 and r1 is allocated to p2
and p2 is waiting for r2 and r2 is given for p1
this is also called circular wait
5. threads is smallest unit of multithreading where each thread leads to a separate path of execution
process is any program in execution. in this program is smallest unit
6. virtual memory: during execution of any program all the pages of the program
can be loaded into memory for execution. which acquires more time for reading and more time is consumed so the pages which is currently needed will be placed in memory and then executed.
2.normal form is used to break the database into simpler form there are 5 normal forms which is used in simplifying database
1stNF-deleting duplicate entries
2ndNF-functional dependency
3rdNf-transitive dependency
boycodd NF-remove transitive dependency