How does a higher picture resolution affect quality & file size?

Quality is improved as there is more detail, file size is larger

Metadata refers to information stored about an image.

What formula is used to calculate the file size of an image without knowing the DPI?

Width of pixels x Height of pixels x colour depth.

The number of bits used to encode each pixel and thus the number of available colours

How does a higher colour depth i.e. 16 bit instead of 4 bit effect quality & file size?

Quality is improved as there are more colours available per pixel but file size is larger

Vibrations travelling through air, water or metal.

The amplitude of a sound wave is...

How high the wave is from the crest or trough

Define what is meant by 'sampling'

Height of the wave is measured, at intervals and stored as binary.

The number of samples taken each second

The number of bits used per second of audio

Which three factors affect the quality of an audio clip?

Sample rate, bit rate and bit depth

How does sample rate affect the quality of an audio clip and file size?

The more bits that are sampled the better the accuracy of the file but also the greater the file size.

All the characters recognised/can be represented by a computer. Each character has a number.

Why was Unicode developed in 1991?

There was a need for a universal standard and more characters to cover all languages on earth.

What does Lossy Compression do to files?

Eliminates unnecessary information in a file to reduce file size

What is Lossless Compression?

There is no loss of information at all after compression

OCR GCSE Computer Science: Data Representation

Flashcard

•

Computers

•

11th Grade

•

Practice Problem

•

Hard

Aaysha Fatima

FREE Resource

Student preview

49 questions

Show all answers

1.

FLASHCARD QUESTION

Front

What is the smallest unit of data in computing?

Back

Bit

2.

FLASHCARD QUESTION

Front

How many bits are there in a byte?

Back

8

3.

FLASHCARD QUESTION

Front

What is a nibble equivalent to?

Back

4 bits

4.

FLASHCARD QUESTION

Front

What does binary data represent in computers?

Back

Analogue data

5.

FLASHCARD QUESTION

Front

What device converts analogue signals to digital data?

Back

Analogue-to-Digital Converter

6.

FLASHCARD QUESTION

Front

How many bytes are in 1 kilobyte?

Back

1000

7.

FLASHCARD QUESTION

Front

What is the binary system also known as?

Back

Base 2

Create a free account and access millions of resources

Create resources

Host any resource

Get auto-graded reports

Continue with Google

Continue with Email

Continue with Classlink

Continue with Clever

or continue with

Microsoft

Apple

Others

Already have an account?

Popular Resources on Wayground

5 questions

This is not a...winter edition (Drawing game)

Quiz

•

1st - 5th Grade

25 questions

Multiplication Facts

Quiz

•

5th Grade

10 questions

Identify Iconic Christmas Movie Scenes

Interactive video

•

6th - 10th Grade

20 questions

Christmas Trivia

Quiz

•

6th - 8th Grade

18 questions

Kids Christmas Trivia

Quiz

•

KG - 5th Grade

11 questions

How well do you know your Christmas Characters?

Lesson

•

3rd Grade

14 questions

Christmas Trivia

Quiz

•

5th Grade

20 questions

How the Grinch Stole Christmas

Quiz

•

5th Grade

Discover more resources for Computers

26 questions

Christmas Movie Trivia

Lesson

•

8th Grade - Professio...

15 questions

Christmas Song Emoji Pictionary

Quiz

•

7th - 12th Grade

20 questions

Christmas Movies

Quiz

•

1st - 12th Grade

20 questions

Christmas Movie Trivia

Quiz

•

9th - 12th Grade

29 questions

christmas facts

Lesson

•

5th - 12th Grade

20 questions

Christmas Trivia

Quiz

•

5th - 12th Grade

20 questions

Stages of Meiosis

Quiz

•

9th - 12th Grade

20 questions

christmas songs

Quiz

•

KG - University