1. Kernel minimizes the frequency of disk access by keeping a pool of internal data buffer which helps to increase the response time, this is known as ?
Buffer cache
Spooling
Pooling
Virtual Memory
Answer: Option A
2. Which command is used to determine the path of an executable file ?
which
whom
locate
wex
Answer: Option A
3. Which command output also contains userid ?
la
al
ls -l
al -l
Answer: Option C
4. Which option of "grep" displays the line number as well ?
-n
-l
-d
-al
Answer: Option B
5. How many links are created when we create a directory file ?