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1.2 Memory, Storage and Representation Essential Knowledge

Total questions: 61

Worksheet time: 46mins

Name
Class
Date
1.

Why do computers need primary memory?

a)

Store data long term

b)

Hold data that is in use

2.

Select ALL of the primary memory types:

a)

RAM

b)

Hard Disk Drive

c)

ROM

d)

Cache

e)

Registers

3.
RAM is non-volatile 
a)
True
b)
False
4.

Which of these would be held in ROM

a)

Boot up sequence (BIOS)

b)

Operating System

c)

Open programs / data that is in use

d)

Data that is not in use

5.
When is virtual memory needed?
a)
When RAM is full
b)
When you want to store data online
c)
When your Hard-Drive is full
d)
When you need to update RAM
6.

Where is virtual memory located?

a)
CPU
b)
RAM
c)
ROM
d)
Secondary Storage
7.

Data stored in _____ is permanent and is can't changed

a)
BIOS
b)
RAM
c)
ROM
d)
Hard Drive
8.

What does volatile mean?

a)

Once power is swiched off, all stored data will be lost.

b)

Once power is switch off, data will remain.

9.

Select the two items that RAM stores:

a)

BIOS

b)

Open programs/data in use

c)

The OS (when the computer has booted up)

d)

Data/instructions needed immediately by the CPU

e)

Frequently used data

10.

Select the item that Cache stores:

a)

BIOS

b)

Open programs/data in use

c)

The OS (when the computer has booted up)

d)

Data/instructions needed immediately by the CPU

e)

Frequently used data

11.

Select the item that the registers store:

a)

BIOS

b)

Open programs/data in use

c)

The OS (when the computer has booted up)

d)

Data/instructions needed immediately by the CPU

e)

Frequently used data

12.

RAM, ROM, CACHE and the Registers are all types of primary storage. Select the statements which describe the characteristics of Primary Storage

a)

Mainly volatile

b)

Non Volatile

c)

Small capacity compared to other tiers of storage

d)

Large capacity compared to other tiers of storage

e)

Directly accessible by the CPU

13.

What are the three main categories of secondary storage?

a)

Magnetic

b)

Liquid State

c)

Solid State

d)

Optical

e)

Tertiary

14.

What category of secondary storage do these belong to?

a)

Magnetic

b)

Optical

c)

Solid State

15.

What category of secondary storage does this device belong to?

a)

Optical

b)

Magnetic

c)

Solid State

16.

What category of secondary storage does this belong to?

a)

Magnetic

b)

Optical

c)

Solid State

17.

What category of secondary storage does this belong to?

a)

Magnetic

b)

Optical

c)

Solid State

18.

Which secondary storage category has the fastest read-write speeds/ data access speeds?

a)
Solid State
b)
Magnetic
c)
Optical
d)
USB
19.

Which is generally the most expensive category of storage?

a)
Solid State
b)
Magnetic
c)
Optical
20.
Which of the following storage devices will most likely have the highest capacity?
a)
Magnetic storage
b)
Solid state storage
21.

Which of the following have the fastest read/write speed?

a)
Magnetic storage
b)
Solid state storage
22.

Which of the following is the cheapest device to buy?

a)
Magnetic storage
b)
Solid state storage
c)
Optical storage
23.
A portable device such as a smartphone or tablet is likely to have which type of storage?
a)
Magnetic storage
b)
Solid state storage
c)
Optical storage
24.

Which of the following secondary storage categories is the most durable/robust?

a)
Magnetic storage
b)
Solid state storage
c)
Optical storage
25.

Which of the following shows the capacity of OPTICAL STORAGE MEDIA in the correct order (smallest to largest)?

a)

DVD > BLU RAY > CD

b)

CD > DVD > BLU RAY

c)

BLU RAY > DVD > CD

d)

DVD > CD > BLU RAY

26.

What is the number system called that computers use?

a)

Binary

b)

Denary

c)

Hexadecimal

27.

What is the number system called that humans use?

a)

Binary

b)

Denary

c)

Hexadecimal

28.

What base system is this number in? 102

a)

Binary

b)

Denary

c)

Hexadecimal

29.

What base system is this number in? 10110

a)

Binary

b)

Denary

c)

Hexadecimal

30.

What is 1111 in denary?

a)

15

b)

F

c)

4

31.

What is 7 in binary?

a)

1000

b)

0110

c)

0111

32.

What is 20 in binary?

a)

0001 0101

b)

0001 0110

c)

0001 0100

33.

What is 129 in binary?

a)

1000 0010

b)

1000 0001

c)

1000 0100

34.

The rule in binary addition for 1+1 is

a)

0 carry 1

b)

1 carry 1

35.

The rule in binary addition for 1+1+1 is

a)

0 carry 1

b)

1 carry 1

36.

Doing a logical shift left does what to a binary number?

a)

Divide

b)

Multiply

37.

Doing a logical shift right does what to a binary number?

a)

Divide

b)

Multiply

38.

Calculate the binary addition:

01

11

a)
101
b)
11
c)
111
d)
100
39.
Convert the Hex number B9 to binary.
a)
10111001
b)
10111000
c)
10111101
d)
10101001
40.

How many bits are used in the ASCII character set?

a)

16

b)

1

c)

7

d)

8

41.

The ASCII character set is capable of representing non-European languages

a)

TRUE

b)

FALSE

42.

A character set is...

a)

What language can be used by a computer system

b)

The fonts that a computer has installed

c)

The possible characters that can be represented by a computer system.

43.

Each character in a character set is represented by a unique binary number

a)

True

b)

False

44.
Increasing the colour depth means…
a)
A bigger range of colours can be used for each pixel
b)
More pixels are in the image.
c)
More colours are in the image.
d)
Darker colours
45.
How many colours can be used for each pixel if the colour depth is 4 bit?
a)
4 colours
b)
5 colours
c)
15 colours
d)
16 colours
46.
Reducing the amount of colours in the image will
a)
Reduce the quality of the image.
b)
Reduce the amount of binary needed for each pixel.
c)
Make the file size larger
d)
Remove pixels from the image.
47.
Which is NOT an example of metadata for an image file?
a)
Resolution
b)
Colour depth
c)
Camera used
d)
Sample rate
48.
Additional Information about the image file is stored as
a)
Metadata
b)
Properties
c)
File summary
d)
Pixels
49.
The number of pixels per inch in an image is known as the
a)
Dimensions
b)
Colour depth
c)
Resolution
d)
Megapixels
50.
Increasing the resolution of an image means that
a)
More pixels will be used to make up the image
b)
More colours will be used to make up the image
c)
The image size will be bigger
51.
The binary code for each pixel is used to determine
a)
Which colour will be displayed
b)
How big the image is
c)
What shape the image is
d)
How many pixels will be in the image
52.
Define the term "Resolution"
a)
The number of bits used per pixel (BPP).
b)
The number of colours used in an image.
c)
The number of pixels per inch (PPI).
d)
The total number of pixels in an image.
53.
How is all types of data represented in a computer?
a)
Sound
b)
Hex
c)
Binary
d)
English
54.
What is the process called for  converting analogue sound into binary (digital format)?
a)
Conversions
b)
Sampling
c)
Bit Rate
d)
Converting
55.
The height of a sound wave graph is related to what?
a)
Amplitude (loudness)
b)
Pace (speed)
c)
Key
d)
Tone
56.
What sample rate do most CDs have?
a)
44.1kHz
b)
50,000Hz
c)
40.2kHz
d)
4Hz
57.
What is bit depth?
a)
Number of bits assigned to each sample
b)
Rate at which the binary is calculated
c)
How deep the sound can go
d)
The speed of the sound wave
58.
The following is true about sampling rates:
a)

They measure a number of recordings/snapshots of a sound wave taken per second.

b)
They are not as important as bit rates.
c)

They are the number of bits used to store each sound sample

59.
What is compression?
a)

Recording the amplitude of sound waves to create a digital sound file.

b)

Reducing the file size whilst trying to preserve quality.

c)

Scrambling data to prevent unauthorised access during transmission

d)

Rearranging files on a HDD so they are stored together sequentially

60.

Lossy Compression is…..?

a)

Usually performed on text

b)

When some original data is lost, and the original file cannot be re-created

c)

The original file can be re-created from the compressed file

d)

Turning the text into a format that only a reader with a key can decrypt it

61.

Lossless Compression is….?

a)

Usually performed on video files

b)

When some original data is lost and the original file cannot be re-created

c)

The original file can be re-created from the compressed file

d)

Turning the text into a format that only a reader with a key can decrypt it

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