Oracle Installation Interview Questions and Answers - 1

Question: 1

What is System Activity Reporter (SAR)?

SAR is a utility to display resource usage on the UNIX system, such as CPU activity, disk and memory usuage.

There are a number of switches or options that can be used with SAR.

Question: 2

Which UNIX command will control the default file permissions when files are created?

The umask command controls the default file permissions when files are created.

Question: 3

What is the difference between a soft link and a hard link?

In the UNIX operating system, a filename can point either to the data of the file or another file.

A soft link or symbolic link refers to a filename which points to another file while hard link refers to a filename that point to a file, which actually contains data.

Question: 4

Can you change the priority of a process in UNIX?

You can use the renice command to change the priority of a UNIX process with the following restrictions.

A user can only change the nice value of processes, which they own.

A user cannot start processes with nice value less than 20

A user cannot lower the nice values of their processes after they have raised them

Root has full access to the renice command.

Question: 5

What is the cut command in UNIX?

The cut command in used to extract sections from each line of input.