Four number-pairs are given, out of which three are

How can you make a shell script executable?

Which command is used to display the current working directory?

What does the #!/bin/bash line at the beginning of a shell script indicate?

In shell scripting, how do you assign the string "Hello World" to a variable named `MESSAGE`?

Which command is used to display the number of lines in a file?

Extended globbing in bash allows:

What does the command `chmod 755 myscript.sh` set as permissions for `myscript.sh`?

In bash, what does trap 'echo Exit' EXIT do?

Which command is used to display the last few lines of a file?

Which ETL process step validates and cleans data before loading?