Unix Questions

How to find and delete files older than a year in Unix?

Write the awk command print the 5th column of 'ls -l'?

What will be the default permissions of a file created in Unix?

How would you execute a script file and how to execute the script file from a different directoy?

Write the grep command to find pattern "Vinod" and "Vinney" from a file.

what is SED and AWK?