OpenGL MCQs (Chapterwise Multiple Choice Questions)

Which of the following functions has an unsigned byte variant? (taking GLubyte as arguments)

glVertex

glColor

glNormal

glTexCoord

None of the above

Answer & Explanation

Correct Answer: glColor

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What is "immediate mode"?

OpenGL's mneumonic for the way of converting pixels to HDR equivalents

A frame loop that repeats once per cycle

A deprecated set of functions that permit the user to quickly learn the basic building blocks of OpenGL

A type of screen mode that allows graphics to immediately be displayed

Answer & Explanation

Correct Answer: A deprecated set of functions that permit the user to quickly learn the basic building blocks of OpenGL

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Generally, what primitive polygon is used for creating a mesh to represent a complex object?

Triangle

Square

Rectangle

Circle

Answer & Explanation

Correct Answer: Triangle

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What organization is currently responsible for OpenGL's standardization and development?

Khronos

Chronos

id Software

Cryptic

Crysis

Answer & Explanation

Correct Answer: Khronos

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If a coordinate system (CS1) is transformed to another coordinate system (CS2) using a matrix M, is it possible to go from CS2 to CS1 and how?

No, once a coordinate system is transformed, it cannot be reversed.

Yes, apply inverse of M.

Yes, call glReversCS() with CS2 and M as parameters.

Yes, apply M again.

Answer & Explanation

Correct Answer: Yes, apply inverse of M.

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Once a 2D or 3D rotation is performed, is it possible to reverse the rotation?

Yes

No

Answer & Explanation

Correct Answer: Yes

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glLoadIdentity () is the preferred way to load the identity matrix onto the matrix stack.

True

False

Answer & Explanation

Correct Answer: True

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What is the use of glGet?

To set specific values from the hardware context

To get specific values from the hardware context

To read pixels back from any buffer

To read pixels back from the screen buffer

Answer & Explanation

Correct Answer: To get specific values from the hardware context

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What is glTexCoord*() used for?

Defines a coordinate in a texture space in which to draw ontop of the texture.

Used to define the coordinate system of a texture.

Defining the coordinates in texture space to be mapped to object space.

An newly added function where OpenGL supports placing a texting window for mobile applications.

Answer & Explanation

Correct Answer: Defining the coordinates in texture space to be mapped to object space.

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How do you activate a shader program in OpenGL?

glShader(ProgramID);

glUseShader(ProgramID);

glProgram(ProgramID);

glUseProgram(ProgramID);

glUserProgram(ProgramID);

Answer & Explanation

Correct Answer: glUseProgram(ProgramID);

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OpenGL Quick Quiz

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