Which of the following commands increases the number of elements in a directory? (Choose two)

1. A. touch newfile
2. B. create newfile
3. C. ls newfile
4. D. rmdir newdirectory
5. E. mkdir newdirectory

Correct Answer: AE

Which network interface always exists in a Linux system?

1. A. lo
2. B. sit0
3. C. wlan0
4. D. vlan0
5. E. eth0

Correct Answer: A