computer science mcqs

Computer Graphics & Digital Image Processing MCQS with AnswerS 

We have made some Computer Graphics & Digital Image Processing MCQS (Mulitiple Choice Questions) which helps to prepare for competitive exams and various university exams or btech computer science 6th sem exams.This might be useful to gate preparation too.

Q1  Scalars have only ……………………and are not related to any fixed ………………..in space.

a)Direction , Magnitude

b)Magnitude,Direction

c)Representation ,Magnitude

d)Magnitude ,Representation

 Q2   …………………….Quantities have both magnitude and directions.

a)Scalars

b)Vectors

c)Either a) or b)

d)Both a) and b)

 Q3  .Vectors are represented by directed …………………….

a)line segments

b)line

c)arrows

d)None of these

 Q4  A vector PQ   , determined by two points P,Q such that ……………… of vector is the……………of straight line PQ and its direction is that from Pto Q.

a)direction,length

b)magnitude , representation

c)Magnitude , length

d)Magnitude , direction

 Q5  Representation of vectors is such that the length of line segment is the………………….of vector and ……….of arrow marked at one end emphasizes the direction of vector.

a)Magnitude ,direction

b)representation , direction

c)Magnitude ,Representation

d)None of the above

 Q6  Since intersection calculations involves Non-linear curve equations , Clipping algorithm for curved Boundary clipping region are ……………………………………than Rectangular Boundary clipping region.

a)slower

b)faster

c)None of above

d)either a) or b)

 Q7  What is  the magnitude of vector  A=3i-2j+6k ?

a)8

b)49

c)7

d)None of these

 Q8  If the position vector A of a point (12,n) is such that Magnitude of vector A=13 ,then value of n is :

a)5

b)7

c)6

d)25

 Q9  A unit vector parallel to vector (-3)i+4j is

a)2i +3j

b)(-3/5)i+(4/5)j

c)3i+4j

d)None of these.

 Q10           If the position vector A of a point (12,n) is such that Magnitude of vector A=15 ,then value of n is :

a)0.5

        b)0.7

        c)0.6

       d)None of these

 Q11           Length of vector PQ is determined by :

a)Position vector of Q – Position vector of P

b) Position vector of P– Position vector of Q

c)IPI-IQI

d)None of the above

 Q12           ………………………vector is that whose modulus is………………

a)Unity, Parallel

b)Parallel , unity

c)Unit , unity

d)None of the above

 Q13           For the vectors A and B are said to be equal , A=B ; if they have :

a)Same length

b)Same or Parallel support

c)Same sense

d)All of the above

 Q14           Since , I,j,k are mutually perpendicular unit vectors along the coordinate axes  , then product of  unit-vector (i) in x-direction and unit-vector (j) in y-direction is…………………..

a)0

b)1

c)Infinite

d)None of the above.

 Q15           …………………..is a vector of magnitude of 5 units which is parallel to vector 2i-j ?

2√5i-√5j

2i-5j

3i-6j

None of the above.

 Q16           Since , I,j,k are mutually perpendicular unit vectors along the coordinate axes  , then product of  unit-vector (i) in x-direction and unit-vector (j) in z-direction is…………………..

a)0

b)1

c)Infinite

d)None of the above.

 Q17           Since , I,j,k are mutually perpendicular unit vectors along the coordinate axes  , then product of  unit-vector (i) in z-direction and unit-vector (j) in y-direction is…………………..

a)0

b)1

c)Infinite

d)None of the above.

 Q18           Support vector of PQ is the ………………….. of …………………………..length of which PQ is segment .

a)line , limited

b)line , unlimited

c)line segment ,finite

d)None of these

 Q19           In Cyrus-Beck line clipping algorithm , the parametric equation of a line segment from P1 to P2 is…………………………………………………………

a.       P(t)=P1+(P2-P1)t ;0<=t<=1

b.      P(t)=P1+(P2-P1)t ;1<=t<=0

c.       P(t)=P1+(P2-P1)t ;0<t<1

d.      P(t)=P1+(P1-P2)t ;0<=t<=1

 Q20           In case of ALL or None character clipping , we discard only those characters that are not …………………. the window.

a)Partially inside

b)completely inside

c)Either a) or b)

d) None of above

 Q21           …………………………………..clips convex polygons correctly , but in case of concave polygon , it displays an extraneous line .

a)Sutherland-Hodgeman

b) DDA algorithm

c)None of above

d)Either a ) or b)

 Q22           The problem of extraneous line in Sutherland-Hodgeman Polygon Clipping Algorithm can be solved by …………………………………………….Concave Polygon into two or more convex polygons and processing each convex polygon separately.

a.       Separating

b.      Attaching

c.       None of Above

d.      Either a)or b)

 Q23           You have given a code of an algorithm .Arrange them in an order so that this function is used to draw a line.

a) void draw(int x1,int y1,int x2,int y2)

{

float x,y,xinc,yinc,dx,dy;

int k;

b )int step;

a.      dx=x2-x1;

                 dy=y2-y1;

putpixel(x,y,1);

if(abs(dx)>abs(dy))

step=abs(dx);

else

step=abs(dy);

xinc=dx/step;

yinc=dy/step;

x=x1;

y=y1;

d )

 for(k=1;k<=step;k++)

{

x=x+xinc;

y=y+yinc;

putpixel(x,y,2); }}

a)a-b-c-d

b)a-c-b-d

c)a-d-c-b

d) a-b-d-c

 Q24            In …………………………projection , z-coordinate is discarded and parallel lines from each vertex on the object are extended until they intersect the view plane.

a)Parallel

b)Perspective

c) Orthographic

d)None of above

 Q25           In ………………………….Projection , the lines of projection are not parallel.

a)Parallel

b)Perspective

c) None of above

d)Either a) or b)

 Q26            In Perspective Projection , the lines are converged at a single point called the……………………………

a)Center of Projection

b)Projection Reference Point.

c)Either a)or b)

d)  None of above

 Q27           To create realistic image , the depth information is important so that we can easily identify , for a particular viewing direction , which is the………………………..and which is the ……………………….of displayed objects.

a)front , Back

b)Data insufficient

c)None of above

d)either c) or b)

 Q28           In Depth cueing , the parts of the objects closest to viewing position are displayed with highest intensities , and objects farther away are displayed with decreasing intensities.

a)highest , decreasing

b)decreasing, highest

c)None of above

d)either a)or b).

 Q29           In …………………………….., it is possible  to clarify the depth relationships in a wireframe display by identifying visible lines. The visible lines can be highlighted or displayed with different colour or non visible lines can be displayed by dashed lines or not display at all.

a)Parallel Projection

b)Perspective Projection

c)Depth cueing

d)Visible Line identification.

 Q30           …………………………………is a collection of edges, vertices, and polygons connected such that each edge is shared by atmost two polygons.

a)Polygon Clipping

b)Polygon Meshes

c)Either a )or b)

d)None of above

 Q31           In …………………………………….representation , polygons are defined with pointers to a vertex list.

a)Pointer to edge

b)either a) or c)

c)Pointer to vertex list

d)None of above

 Q32           In ………………………………………….method it is difficult to find polygons that share an edge, and shared edges are still drawn twice when all polygon outlines are displayed.

a)Pointer to edge

b)either a) or c)

c)Pointer to vertex list

d)None of above

 Q33           The difficulty in Pointer to vertex list representation is removed in ………………………………………..method.

a)Pointer to edge

b)either a) or c)

c)Pointer to vertex list

d)None of above

 Q34           The difficulty in Pointer to vertex list representation is removed by representing ……………………………………….

a)edges 

b)edges implicitly

c)verticies implicitly

d)edges explicitly.

 Q35           The Right –handed system uses the right hand thumb to point the………………………direction.

a)Positive z-

b)Negative Z-

c)Either a or b

d)None of above

 Q36           The Left –handed system uses the left hand thumb to point the………………………direction.

a. Positive z-

       b. Negative Z-

c. Either a or b

d. None of above.

 Q37           The creation of realistic pictures is an important task in fields such as………………….

a)simulation

b)Design and Entertainment

c)Advertising, Research & Education

d)All of above.

 Q38           One of the way of specifying a plane is by a single point in the plane and the direction perpendicular to the plane.  A vector perpendicular to plane is called…………………………….

a.       Parallel vector

b.      Normal Vector

c.       None of above

d.      either a or b

 Q39           In Beizer curve , the basis functions are ……………….

a.       Real

b.      Imaginary

c.       Either Real and Imaginary

d.      None of these

 Q40           Beizer curve has ………………. End-points as the guiding polygon.

a)same

b)different

c)none of above

d)either a) or b)

 Q41           The ………………………………..property for a Beizer Curve ensures that the polynomial smoothly follows the control points.

           a)convex hull

b)hull convex

c)None of above

d)either a) or b)

 Q42           The Beizer Curve is …………………………under an affine transformation.

a.       Invariant

b.      Variant

c.       None of above

d.      Either a) or b)

 Q43           The Beizer curve exhibits the variation …………………………….property.

a)Diminishing

b)Enhancing

c)None of above

d)either a) or b)

 Q44           In a general, a Beizer curve section can be fitted to ………. number of control points.However , as number of control point increases , the degree of Beizer polynomial also………………….

a)any,increases

b)four only , decreases

c)data insufficient

d)None of above

 Q45           In a Beizer curve , a degree of polynomial is one…………………….than the number of control points used.

a)more

b)less

c)None of above

d)Data insufficient.

 Q46           In a Beizer Curve, three control points generate a …………………………………..

a)ellipse

b)Hyperbola

c)Parabola

d)None of above.

 Q47           In a Beizer Curve, four control points generate a …………………………………..

a)cubic curve

b)Hyperbola

c)Parabola

d)None of above.

 Q48           In Beizer curve, the direction of tangent vector at the end-points is the………………………………as that of the vector determined by first and last segments.

a)same

b)different

c)None of above

d)Either a) or b)

1	b
2	b
3	a
4	c
5	a
6	a
7	c
8	a
9	b
10	d
11	a
12	c
13	d
14	a
15	a
16	a
17	a
18	b
19	a
20	b
21	a
22	a
23	b

24	a
25	b
26	c
27	a
28	a
29	d
30	b
31	c
32	c
33	a
34	d
35	a
36	a
37	d
38	b
39	a
40	a
41	a
42	a
43	a
44	a
45	b
46	c
47	a
48	a