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Free Practice Quiz Question List

02 — Information and Representation Online Quiz Questions

Use this free practice quiz with 20 questions to review 02 — Information and Representation, test your knowledge, and prepare for your next test or exam.

20 questions
01
True or false
1 point

True or false: A sequence of bits has a fixed meaning regardless of the representation or encoding rules being used.

  1. A

    True

  2. B

    False

02
Choose one
1 point

What is the greatest value that can be represented by an 8-bit unsigned integer?

  1. A

    255

  2. B

    256

  3. C

    128

  4. D

    512

03
Written response
1 point

What encoding form maps Unicode characters to sequences of one to four bytes while remaining ASCII-compatible?

04
Fill in the blank
1 point

Complete the statement: A byte normally contains bits.

05
Choose all
1 point

Select all statements that correctly describe UTF-8.

  1. A

    ASCII characters use one byte in UTF-8.

  2. B

    Every Unicode character uses exactly one byte in UTF-8.

  3. C

    UTF-8 does not depend on the computer's byte order.

  4. D

    UTF-8 can represent only modern writing systems.

06
Fill in the blank
1 point

Complete the statement: The difference between a continuous measurement and the finite digital level to which it is rounded is called .

07
Choose all
1 point

Select all statements that correctly describe digital audio sample representation.

  1. A

    Increasing sample bit depth generally increases quantization error.

  2. B

    Stereo stores two audio channels.

  3. C

    A higher sample bit depth allows fewer numerical levels per sample.

  4. D

    For the same sampling rate and sample size, stereo requires twice the channel data of mono.

08
Written response
1 point

A mono recording uses a sampling rate of 44,100 samples per second and 16-bit samples. Before compression and file overhead, what is the data rate in bytes per second? Enter the number only.

09
Choose one
1 point

Which representation is generally best suited to enlarging a logo while preserving sharp edges?

  1. A

    Vector graphic

  2. B

    Raster image

  3. C

    Grayscale image

  4. D

    Compressed audio file

10
True or false
1 point

True or false: Increasing the sampling rate can allow a digital recording to represent faster changes in a sound waveform and a wider range of frequencies, provided the system is designed appropriately.

  1. A

    True

  2. B

    False

11
Open ended
1 point

Explain why the same sequence of bits can represent different kinds of information. Use one example from the materials and distinguish the bit pattern from the rule that gives it meaning.

12
Written response
1 point

What is the one-word name for the distortion that occurs when high-frequency sound information is misrepresented as lower-frequency information because the sampling rate is too low?

13
Choose one
1 point

What decimal value is represented by the binary number 11001₂?

  1. A

    19

  2. B

    21

  3. C

    25

  4. D

    27

14
Choose one
1 point

Why could the bit pattern 01000001 represent different things in different contexts?

  1. A

    The number of bits alone

  2. B

    An agreed representation or encoding

  3. C

    The voltage used to transmit the bits

  4. D

    The file's physical storage location

15
Choose one
1 point

Which range is normally available for a 16-bit signed integer represented using two's complement?

  1. A

    −65,535 through 65,535

  2. B

    −32,767 through 32,768

  3. C

    0 through 65,535

  4. D

    −32,768 through 32,767

16
Choose one
1 point

A text file contains only ASCII characters and is saved as UTF-8. How many bytes does each ASCII character use in UTF-8?

  1. A

    An ASCII character uses one byte

  2. B

    Every Unicode character uses exactly two bytes

  3. C

    An ASCII character always uses four bytes

  4. D

    UTF-8 stores only non-ASCII characters

17
Choose one
1 point

A logo must be enlarged substantially while preserving smooth edges. Which representation is generally the better choice, and why?

  1. A

    A raster image, because pixels become more detailed when enlarged

  2. B

    A raster image, because raster data is resolution-independent

  3. C

    A vector graphic, because its shapes are represented mathematically

  4. D

    Neither representation, because enlargement always removes detail

18
True or false
1 point

True or false: In digital audio, sampling a waveform at too low a rate can cause aliasing.

  1. A

    True

  2. B

    False

19
Written response
1 point

What is the technical term for text that becomes corrupted in appearance when its bytes are decoded using the wrong character encoding?

20
Choose one
1 point

A color image uses 24-bit RGB pixels with 8 bits for each of red, green, and blue. How many distinct color combinations can one pixel represent?

  1. A

    65,536

  2. B

    16,777,216

  3. C

    24,000,000

  4. D

    256,000,000