Institute of Management Studies, Ghaziabad
Computer Graphics Quiz SET ‘ A’
Roll No:_____________________ Marks:___________
1. Which devices provides positional information to the graphics system ?
a) Input devices b) Output devices c) Pointing devices d) Both a and c
2. The number of pixels stored in the frame buffer of a graphics system is known as
a) Resolution b) Depth c) Resolution d) Only a
3. In graphical system, the array of pixels in the picture are stored in
a) Memory b) Frame buffer c) Processor d) All of the mentioned
4. The maximum number of points that can be displayed without overlap on a CRT is referred as
a) Picture b) Resolution c) Persistence d) Neither b nor c
5.________ stores the picture information as a charge distribution behind the phosphor-coated
screen.
a) Cathode ray tube b) Direct-view storage tube c) Flat panel displays d) 3D viewing device
6. The devices which converts the electrical energy into light is called
a) Liquid-crystal displays b) Non-emitters c) Plasma panels d) Emitters
7. In which system, the Shadow mask methods are commonly used
a) Raster-scan system b) Random-scan system c) Only b d) Both a and b
8. The process of digitizing a given picture definition into a set of pixel-intensity for storage in the
frame buffer is called
a) Rasterization b) Encoding c) Scan conversion d) True color system
9. Which display devices allows us to walk around an object and view it from different sides.
a) Direct view storage tubes b) Three-dimensional devices
c) Flat panel display devices d) Plasma panel display devices
10. 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
12. Random-scan system mainly designed for
a) Realistic shaded screen
b) Fog effect
c) Line-drawing applications
d) Only b
View Answer
Answer: c
Explanation: Random-scan system mainly designed for Line-drawing applications.
13. The primary output device in a graphics system is_________
a) Scanner
b) Video monitor
c) Neither a nor b
d) Printer
View Answer
Answer: b
Explanation: The video monitor is the commonly used output device.
14. 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
View Answer
Answer: c
Explanation: Bit map frame buffer is always 1 bit per pixel.
15. 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
View Answer
Answer: d
Explanation: none.
1. A translation is applied to an object by
a) Repositioning it along with straight line path
b) Repositioning it along with circular path
c) Only b
d) All of the mentioned
View Answer
Answer: a
Explanation: A translation is applied to an object by repositioning it along with straight line path from one
location to another.
2. We translate a two-dimensional point by adding
a) Translation distances
b) Translation difference
c) X and Y
d) Only a
View Answer
Answer: d
Explanation: We can translate 2D point by adding translation distances dx and dy.
3. The translation distances (dx, dy) is called as
a) Translation vector
b) Shift vector
c) Both a and b
d) Neither a nor b
View Answer
Answer: c
Explanation: The translation distances (dx, dy) from its original position is called as translation vector or shift
vector.
4. In 2D-translation, a point (x, y) can move to the new position (x’, y’) by using the equation
a) x’=x+dx and y’=y+dx
b) x’=x+dx and y’=y+dy
c) X’=x+dy and Y’=y+dx
d) X’=x-dx and y’=y-dy
View Answer
Answer: b
Explanation: By adding translation distance dx and dy to its originsl position (x, y) we can obtain a new position
(x’, y’).
5.The two-dimensional translation equation in the matrix form is
a) P’=P+T
b) P’=P-T
c) P’=P*T
d) P’=p
View Answer
Answer: a
Explanation: The 2D translation equation is P’=P+T.
6. _________ is a rigid body transformation that moves objects without deformation.
a) Rotation
b) Scaling
c) Translation
d) All of the mentioned
View Answer
Answer: c
Explanation: Translation a rigid body transformation that moves objects without deformation.
7. A straight line segment is translated by applying the transformation equation
a) P’=P+T
b) Dx and Dy
c) P’=P+P
d) Only c
View Answer
Answer: a
Explanation: A straight line segment is translated by applying the transformation equation P’=P+T to each of line
endpoints.
8. Polygons are translated by adding __________ to the coordinate position of each vertex and the current
attribute setting.
a) Straight line path
b) Translation vector
c) Differences
d) Only b
View Answer
Answer: d
Explanation: None.
