Multiple choice

1.Instead of using a mouse, you can use this pointing device to control the pointer by rotating a ball with your thumb.

1. Pointing stick 

2. Touchpad 

3. Joystick 

4. Trackball

2.If your wrist is getting strained from repetitive typing, it is advisable to use a(n)

1. ergonomic keyboard.

 2. wireless keyboard. 

3. traditional keyboard. 

4. flexible keyboard.

3.Used commonly for classroom presentations, _____ connect to microcomputers to give output similar to a monitor.

 1. scanners 

2. HDTV 

3. e-books 

4. data projectors

4.This process improves system performance by acting as a temporary high-speed holding area between a secondary storage device and the CPU. 

1. Data compression 

2. Data access 

3. Disk caching 

4. RAID