Computer Graphics Questions and Answers Part-2

1. In LCD, the refresh rate of the screen is
a) 60 frames/sec
b) 80 frames/sec
c) 30 frames/sec
d) 100 frames/sec

Answer: a
Explanation: LCD screen is refreshed at 60 frames per second.

2. Random-scan system mainly designed for
a) Realistic shaded screen
b) Fog effect
c) Line-drawing applications
d) Only b

Answer: c
Explanation: Random-scan system mainly designed for Line-drawing applications.

3. The primary output device in a graphics system is_________
a) Scanner
b) Video monitor
c) Neither a nor b
d) Printer

Answer: b
Explanation: The video monitor is the commonly used output device.

4. On a black and white system with one bit per pixel, the frame buffer is commonly called as
a) Pix map
b) Multi map
c) Bitmap
d) All of the mentioned

Answer: c
Explanation: Bit map frame buffer is always 1 bit per pixel.

5. Aspect ratio means
a) Number of pixels
b) Ratio of vertical points to horizontal points
c) Ratio of horizontal points to vertical points
d) Both b and c

Answer: d
Explanation: Both b and c

6. The most commonly used input device is
a) Mouse
b) Keyboard
c) Scanner
d) Printer

Answer: b
Explanation: Keyboard is the most commonly used input device.

7. Which keys allows user to enter frequently used operations in a single key stroke?
a) Function keys
b) Cursor control keys
c) Trackball
d) Control keys

Answer: a
Explanation: Function keys are used to access frequently used areas.

8. ________ are used to measure dial rotations.
a) Potentiometers
b) Volta meter
c) Parameter
d) None of the above

Answer: a
Explanation: Potentiometer measures the dial rotations.

9. The device which is used to position the screen cursor is
a) Mouse
b) Joystick
c) Data glove
d) Both a and c

Answer: a
Explanation: A mouse is small hand-held box used to position the screen cursor.

10. _________ is used for detecting mouse motion.
a) Optical sensor
b) Rollers on the bottom of mouse
c) Both a and b
d) Sensor

Answer: c
Explanation: Rollers and optical sensors are used to record the amount and direction of movement.