1. Which of the following keystroke combinations will exit the vi text editor? (Choose two.)

a. :q

b. ZZ

c. XX

d. !q

2.Which of the following commands will display the shell that the user is currently using? (Choose two.)

a. echo $1

b. echo $2

c. echo $SHELL

d. echo $0

3. Jordan wants to remove an empty directory that is no longer being used. Which of the following commands could he use to accomplish this task? (Choose all that apply.)

a. rm olddir

b. rm -r olddir

c. rmdir -r olddir

d. rmdir olddir