What is the difference between the i and a commands of the vi editor?

1. A. i (interactive) requires the user to explicitly switch between vi modes whereas a (automatic) switches modes automatically.
2. B. i (insert) inserts text before the current cursor position whereas a (append) inserts text after the cursor.
3. C. i (independent rows) starts every new line at the first character whereas a (aligned rows) keeps the indentation of the previous line.
4. D. i (interrupt) temporarily suspends editing of a file to the background whereas a (abort) terminates editing.

Correct Answer: B

Which of the followingcommand sets the Bash variable named TEST with the content FOO?

1. A. set TEST="FOO"
2. B. TEST = "FOO"
3. C. var TEST="FOO"
4. D. TEST="FOO"

Correct Answer: D

Which command is used to set restrictions on the size of a core file that is created for a user when a program crashes?

1. A. core
2. B. edquota
3. C. ulimit
4. D. quota

Correct Answer: C

What output will the following command sequence produce?
echo '1 2 3 4 5 6' | while read a b c; do echo result: $c $b $a;
done

1. A. result: 3 4 5 6 2 1
2. B. result: 1 2 3 4 5 6
3. C. result: 6 5 4
4. D. result: 6 5 4 3 2 1
5. E. result: 3 2 1

Correct Answer: A

What is the purpose of a screen reader?

1. A. It reads text displayed on the screen to blind or visually impaired people.
2. B. It reads the parameters of the attached monitors and creates an appropriate X11 configuration.
3. C. It displays lines and markers to help people use speed reading techniques.
4. D. It manages and displays files that contain e-books.

Correct Answer: A