# Reflection MCQ Questions And Answers

Reflection MCQs : This section focuses on "Reflection" in Computer Graphics. These Multiple Choice Questions (MCQ) should be practiced to improve the Computer Graphics skills required for various interviews (campus interview, walk-in interview, company interview), placements, entrance exams and other competitive examinations.

1. ____________ is a transformation which produces a mirror image of an object.

A. Translation

B. Reflection

C. Scaling

D. Rotation

View Answer

Ans : B

Explanation: Reflection is a transformation which produces a mirror image of an object.

2. The mirror image can be either about ______.

A. x-axis

B. y-axis

C. x-axis or y-axis

D. None of the above

View Answer

Ans : C

Explanation: The mirror image can be either about x-axis or y-axis.

3. The object is rotated by?

A. 45°

B. 90°

C. 135°

D. 180°

View Answer

Ans : D

Explanation: The object is rotated by180°.

4. How many types of reflection?

A. 1

B. 2

C. 3

D. 4

View Answer

Ans : D

Explanation: Types of Reflection: Reflection about the x-axis, Reflection about the y-axis, Reflection about an axis perpendicular to xy plane and passing through the origin and Reflection about line y=x

5. The object can be reflected about x-axis with the help of which matrix?

A. Reflection about the x-axis

B. Reflection about the y-axis

C. Reflection about an axis perpendicular to xy plane and passing through the origin

D. Reflection about line y=x

View Answer

Ans : A

Explanation: Reflection about x-axis: The object can be reflected about x-axis with the help of the following matrix

6. Reflection about line y=x object may be reflected about line y = x with the help of following transformation matrix.

A. TRUE

B. FALSE

C. Can be true or false

D. Can not say

View Answer

Ans : A

Explanation: Reflection about line y=x object may be reflected about line y = x with the help of following transformation matrix.

7. How many types of reflection is possible in a 3-dimensional environment?

A. 1

B. 3

C. 6

D. 9

View Answer

Ans : B

Explanation: There are three different types of reflections that are possible in a 3-dimensional environment. These reflections are relative to XY plane, reflection relative to YZ plane and reflection reflective to ZX plane.

8. If two pure reflections about a line passing through the origin are applied successively the result is ___________________

A. Quarter rotation

B. Half rotation

C. Pure rotation

D. True reflection

View Answer

Ans : A

Explanation: When we apply reflection one time, it rotates the image by 180 degrees. So, if we repeat it 2 times the total reflection will be of 360 degrees.

9. What is the determinant of the pure reflection matrix?

A. 1

B. 0

C. -1

D. 2

View Answer

Ans : C

Explanation: The determinant of the pure reflection matrix is -1

10. Reflection about y-axis object can be reflected about y-axis with the help of following transformation matrix.

A. Yes

B. No

C. Can be yes or no

D. Can not say

View Answer

Ans : A

Explanation: Yes, Reflection about y-axis object can be reflected about y-axis with the help of following transformation matrix.

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