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11th Grade - University

10 Qs

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Assessment

Quiz

Computers

11th Grade - University

Practice Problem

Hard

Created by

J Sajadah

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10 questions

Show all answers

1.

MULTIPLE SELECT QUESTION

1 min • 1 pt

What are the key reasons for compressing data?

Less space needed for storage

Less time to transmit

Higher quality files

Reduced amount of processing power

Limited RAM

2.

MULTIPLE SELECT QUESTION

1 min • 1 pt

Lossless compression...

Is used when not all the information is needed

Is not as effective as lossy compression

Can fully regenerate the original file

Includes files such as .ZIP

Would be a sensible choice for a music download site

3.

MULTIPLE SELECT QUESTION

1 min • 1 pt

Lossy compression...

Permanently removes data from a file

Always leads to a noticeable loss of quality

Aims to remove redundant data

Can return the original file to its original quality

Would be a sensible choice for a music download site.`

4.

MULTIPLE SELECT QUESTION

30 sec • 1 pt

Dictionary based compression...

Is a lossless compression format

Creates a dictionary of common letter combinations to encode words with fewer characters

Creates a dictionary of smaller letters so less space is used

Sends the dictionary with the data

Doesn't need to send the dictionary with the data

5.

MULTIPLE SELECT QUESTION

30 sec • 1 pt

Run-length encoding...

is Lossless

is Lossy

Can only be used for text

Records the number of repeats of an individual element

Can be used for a wide variety of file types

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which method of compression does not sacrifice any quality?

Both methods sacrifice quality

Neither method sacrifices quality

Lossless compression

Lossy compression

Answer explanation

Lossless compression does not sacrifice any quality as it retains all the original data without any loss during the compression process.

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

How does lossy compression affect multimedia files?

It has no effect on the file size or quality

It slightly reduces their quality but significantly reduces file size

It improves their quality

It makes them larger

Answer explanation

Lossy compression slightly reduces the quality of multimedia files but significantly reduces the file size, making it the correct choice.

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