NDG Linux Essentials 2.21 Final Chapter 10-18 Exam

A pipe allows you to...

• send the same input to multiple commands.

• send the output of one command to another.

• send the output of a command to a file.

• type multiple commands at one prompt.

Channel 2 is:

• STDALL

• STDIN

• STDOUT

• STDERR

The grep command...

• is not case sensitive.

• will display all the lines that begin with the specified Regular Expression.

• will display all the lines in a file containing the specified Regular Expression.

• will display the line numbers in a file that contain a specified Regular Expression.

Which of the following commands can be used to scroll through a text file? (choose two)

• cat

• sort

• less

• more

Which command can be used to print line numbers?

• num

• nl

• sort

• ln

Which are appropriate editors for writing shell scripts? (choose two)

• LibreOffice Writer

• /bin/bash

• vi

• nano

Which of the following are correct about for and while loops? (choose two)

• while loops have a test each cycle to determine if it should run again

• for loops require a variable over which to iterate

• for loops have a test each cycle to determine if it should run again

• for loops operate over a fixed list of items

What is the correct way to assign the word 'Hello' to a variable?

• A = "Hello"

• A="Hello"

• $A="Hello"

• echo "Hello" > A

What is the correct way to save the current directory to a variable?

• pwd $A

• pwd I $A

• A=`pwd

• A=pwd

What is the meaning of $(( $i + 1)) ?

• This runs the command stored in variable i

• This will return the value of the first argument to the script

• 1 will be added to the i variable

• If i is 0, the loop will stop