1. How do you update the linux repositories to re-synchronize the package index files from their sources?

2. Which of the following is correct about partitions?

A. If a disk is divided into 5 partitions, then it can only have 3 primary partitions at most.

B. A partition can only be mounted to the /media directory.

3.Which of the following statement about APT is NOT correct?

A. APT is not a single tool or command

B. APT is a wrapper tool based on RPM originally.

4. Which of the following is NOT a way to put "vim" program in the background?

A. bg vim

B. vim &

C. vim&

D. vim (then press CTRL-Z)