Tag: technology

Multiple choice technology

Command to invert the selection in grep

Reveal answer Fill a bubble to check yourself

Multiple choice technology

Command to remove the directories and also its sub directories.

Reveal answer Fill a bubble to check yourself

Multiple choice technology

Command to provide all access for user, read and execute access for the groups and Read access alone for the others.

Reveal answer Fill a bubble to check yourself

Multiple choice technology

Command to verify the previous command execution status

Reveal answer Fill a bubble to check yourself

Multiple choice technology

Command to verify the number of arguments passed

Reveal answer Fill a bubble to check yourself

Multiple choice technology

Command to retrieve the Process ID of current process

Reveal answer Fill a bubble to check yourself

Multiple choice technology

Command to retrieve the recently initiated job's process ID

Reveal answer Fill a bubble to check yourself

Multiple choice technology

What does it mean ${parameter:-5}

If parameter exists and isn't null, return its value; otherwise return 5
If parameter exists and isn't null, return its value; otherwise set it to 5 and then return it
If parameter exists and isn't null, return 5; otherwise return null.
None of the above

Reveal answer Fill a bubble to check yourself

Multiple choice technology

How to set NULL value to a variable

Reveal answer Fill a bubble to check yourself

Multiple choice technology

Which one of the below checks for the pattern match as x, xx, xxx, ...

Reveal answer Fill a bubble to check yourself