What do you mean by unix operating system?
Is it possible to count number char, line in a file; if so, How?
Describe the concept of “region”.
What is standard unix streams ?
What are system variables in unix?
How to display n-th line of a file in Unix?
How does unix operating system works?
What are internal and external commands in unix?
How to null a file in unix?
How many root directories exist in unix?
What is af_unix?
How would you identify daemons in unix?
Enlist common shells with their indicators.