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OCR J277 - Topic 1.2 (Year 11)

Total questions: 75

Worksheet time: 38mins

Name
Class
Date
1.
RAM - What happens when the electricity Is turned off? (1-2)
a)
The data from the memory is saved onto the hard disk
b)
The data from the memory is saved onto ROM
c)
The data from the memory is saved onto flash memory
d)
The data from the memory is not saved
2.
Where does virtual memory live? (2-3)
a)
Cache
b)
ROM
c)
RAM
d)
Hard Disk
3.
This contains the BIOS (Boot-up program) (3-4)
a)
ROM
b)
Secondary Storage
c)
Hard Disk
d)
RAM
4.
A computer is continuously paging to the swap file. Discuss why this might be (5-8)
a)
The hard disk is too slow
b)
There is not enough RAM
c)
The cache is too slow
d)
The virtual memory is too small
5.

Where are the currently used data and instructions kept? (2-3)

a)

RAM

b)

Cache

c)

Hard disk

d)

ROM

6.
Which of the following is not a type of storage. (1/2)
a)
Magnetic
b)
Solid State
c)
Optical
d)
Hard Drive
7.
What type of storage is a DVD ROM? (1/2)
a)
It is not a storage device
b)
Solid State
c)
Optical
d)
Magnetic
8.
What type of storage is a USB memory stick? (4/5)
a)
Solid State
b)
Optical
c)
Magnetic
d)
It is not a storage device
9.
What type of storage is a SSD card? (4/5)
a)
Magnetic
b)
It is not a storage device
c)
Solid State
d)
Optical
10.
What type of storage is a HDD? (4/5)
a)
Solid State
b)
Optical
c)
Magnetic
d)
It is not a storage device
11.

Which of the following types of storage would likely access its data the fastest? (4-6)

a)

It is not a storage device

b)

Magnetic

c)

Solid State

d)

Optical

12.
Which of the following types of storage is the most durable? (9)
a)
Optical
b)
It is not a storage device
c)
Solid State
d)
Magnetic
13.
Which of the following types of storage is the most expensive per MB/GB? (9)
a)
Solid State
b)
Magnetic
c)
It is not a storage device
d)
Optical
14.
Why is a Hard Disk Drive (HDD) not very portable? (9)
a)
It has moving parts
b)
It will break if you touch it
c)
It is too small
d)
It is too large
15.

Why does a laptop need secondary storage? (1/2)

a)

To store data, files and software for future use

b)

To backup files to move to another computer

c)

To store data that the processor needs

d)

To store programs that are currently running

16.

Which type of storage uses lasers to write the data?

a)

Optical

b)

Magnetic

c)

Solid state

d)

All types

17.

The R/W speed of storage are listed below from fastest to slowest. Which order is correct?

a)

Solid State, Optical, Magnetic

b)

Optical, Magnetic, Solid State

c)

Magnetic, Optical, Solid State

d)

Solid State, Magnetic, Optical

18.

The types of storage are listed below from least expensive per GB to the most expensive per GB. Which order is correct?

a)

Solid State, Optical, Magnetic

b)

Optical, Magnetic, Solid State

c)

Magnetic, Optical, Solid State

d)

Solid State, Magnetic, Optical

19.

The types of storage are listed below from the most reliable to the least reliable. Which order is correct?

a)

Solid State, Optical, Magnetic

b)

Optical, Magnetic, Solid State

c)

Magnetic, Optical, Solid State

d)

Solid State, Magnetic, Optical

20.

How many bytes are there per character in a text file?

a)

0.5

b)

1

c)

1.5

d)

2

21.

Which is the smallest of these data capacities?

a)

2 KB

b)

2049 bytes

c)

0.5 MB

d)

3 GB

22.

Which is the largest of these data capacities?

a)

2048 MB

b)

2 GB

c)

2050 MB

d)

100000 KB

23.

Which formulae can be used to estimate the file size of an image?

a)

number of pixels * number of bytes per pixel

b)

number of pixels *

c)

number of pixels wide * number of pixels high * number of bytes per pixel

d)

number of pixels wide * number of bytes per pixel * number of pixels

24.

Which formulae can be used to estimate the file size of a sound file?

a)

bytes per sample * channels height + number of minutes

b)

samples per second * number of seconds

c)

samples per second * bytes per sample * duration

d)

bytes per sample * samples per second * channels * duration

25.

This occurs 2-4 hours after death, where the blood pools due to gravity. The area affected is a bluish-red color.

a)

rigor mortis

b)

algor mortis

c)

livor mortis

26.

How many bytes are needed to store 32769 different colours? (9)

a)

1

b)

2

c)

3

d)

4

27.

What numeric base does binary operate one?

a)

2

b)

1

c)

8

d)

16

28.

How many bits are there in a byte?

a)

8

b)

16

c)

1

d)

2

29.

What is the maximum number of bits needed to represent 15 in denary?

a)

6

b)

4

30.

What is the 8 bit binary representation of 17? (5-7)

a)

00010010

b)

00010001

c)

00001101

d)

00100010

31.

What is the binary representation of 32? (5-7)

a)

00100000

b)

00100100

c)

00110000

d)

00100001

32.

What is the denary representation of this 8 bit number? 01001111 (5-7)

a)

59

b)

79

c)

69

d)

49

33.

What is the denary representation of this 8 bit number? 11010101 (5-7)

a)

199

b)

206

c)

228

d)

213

34.

How many bytes are there in a terabyte?

a)

1024 or 1000 Kb

b)

1024 or 1000 Mb

c)

1024 or 1000 Gb

35.

Why do we use the binary number system in Computing? (4-6)

a)

Because a CPU has two transistors

b)

To represent the two different states of transistors

c)

To allow the CPU to be in one of two states

36.

What is the hex number 6B in binary? (6-8)

a)

01101011

b)

10101110

c)

01110111

37.

How many bits are used in ASCII? (1-4)

a)

16

b)

1

c)

7

d)

8

38.

How many Bytes are used in Unicode? (1-4)

a)

8

b)

16

c)

1

d)

2

39.

The ASCII code is represented by using 16 bits. (1-4)

a)

True

b)

False

40.

The ASCII is capable of representing non-European languages. (3-4)

a)

True

b)

False

41.

Upper and lower case letters have a different ASCII code? (3-4)

a)

True

b)

False

42.

What is the maximum number of values that can be represented in 8-bits? (4-6)

a)

16

b)

256

c)

65,536

d)

128

43.

What is the maximum number of values that can be represented in 7-bits? (4-6)

a)

16

b)

256

c)

65,536

d)

128

44.

A character set is… (4-6)

a)

What language can be used in a computer system

b)

The fonts that a computer has installed.

c)

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

45.

ASCII can represent more characters than Unicode? (4-6)

a)

True

b)

False

46.

ASCII Stands for (6-7)

a)

American Standard Code for Information Interchange

b)

American Scientific Code for Information Interchanging

c)

Absolute Standard Codes for Instruction Interchange

47.
The smallest unit of data stored in an image file is called:
a)
Pixels
b)
Resolution
c)
Alpha
d)
Bitmap.
48.

What is meant by colour depth? (4-6)

a)

Number of pixels in the image

b)

The number of colours available for each pixel

c)

How pixelated the image is

49.

If you increase the colour depth the file size will decrease. (4-6)

a)

True

b)

False

50.

How many colours can be represented with a 4 bit colour depth? (7-9)

a)

2

b)

4

c)

16

d)

256

51.

What is the term used to define what must be known about a bitmap, for it to be

represented accurately? (4-6)

a)

Microdata

b)

Metadata

c)

Megadata

52.

In modern technology what unit of measurement would be used for screen

resolution? (4-6)

a)

Pixels per inch (PPI)

b)

Dots per inch (DPI)

c)

Pixels per metre (PPM)

53.

Which of the following is not stored as metadata about an image? (6-9)

a)

Height

b)

Colour depth

c)

Resolution

d)

Number of people in the image

54.

Which of the following is not an image file?

a)

PNG

b)

JPEG

c)

Bitmap

d)

MPEG

55.

What three colours are used to produce a broad array of colours in a computer system?

a)

Green, Red, Orange

b)

Red, Green Blue

c)

Yellow, Green, Red

56.

What is the name of the type of graphic that uses shapes of solid colour? (6-8)

a)

Raster

b)

GIF

c)

JPEG

d)

Vector

57.

What is sample rate measure in?

a)

Bits

b)

Hertz

c)

GB

d)

amps

58.

Which of the following is not true if you increase the sample rate? (3-6)

a)

Better quality of recording

b)

Needs greater storage space

c)

Larger file size

d)

Decrease in quality

59.

What is meant by bit depth? (3-6)

a)

The number of samples taken per second

b)

The amplitude of each sample

c)

The number of bits used per second of audio

d)

The number of bits used to store each sound sample

60.

What is measured when the wave is sampled? (3-6)

a)

Amplitude

b)

Hertz

c)

Bit rate

d)

Frequency

61.

What sample rate is used for CD quality sound? (6-8)

a)

44,100 Hz

b)

88,200 Hz

c)

22,199 Hz

62.

The purpose of a Digital to Analogue converter is to... (6-8)

a)

Convert binary data into analogue form so we can hear it via a speaker

b)

Convert sound waves into binary so it can be understood by a computer

63.

What piece of hardware would you use to input sound into a computer? (1-3)

a)

Speaker

b)

Analogue to digital converter

c)

Microphone

d)

Digital to analogue converter

64.

If you increase the bit depth of an audio file, you increase the quality. (1-4)

a)

True

b)

False

65.

The amplitude of a sound wave is... (6-9)

a)

How high the wave is from the crest or trough

b)

The frequency at which it is sampled

c)

The speed at which it travels through air

66.
What is compression?
a)
To convert one file to another
b)
To reduce the size of data to save space
c)
To minimise the time taken for a file to be download
d)
To compress something by pressing it hard
67.
What does Lossy Compression do to files?
a)
Increases the file size and keeps the same quality
b)
Eliminates no information at all
c)
Decreases the file size and keeps the same quality
d)
Eliminates unnecessary information in a file to reduce file size
68.
What is Lossless Compression?
a)
No information is lost but file size is increased
b)
There is no loss of information at all after compression
c)
Files which have the exact same data after compression
d)
Compression involves an algorithm
69.
What type of compression does the ZIP format use?
a)
Lossy
b)
Lossless
70.
What type of compression would you use to compress a text file?
a)
Lossy
b)
Lossless
71.

What type of compression would you use to compress a video? (4-6)

a)

Lossy

b)

Lossless

72.

What type of compression may remove some of the data?

a)

Lossy

b)

Lossless

73.

Which of the following are not usually in a compressed format? (7-9)

a)

JPEG

b)

MPEG

c)

Bitmap

d)

MP3

74.

Uncompressed audio and video files require less memory than compressed files.

(1-4)

a)

True

b)

False

75.

JPEG stands for... (4-6)

a)

Joint Photo Exempted Grade

b)

Joint Photographic Experts Group

c)

Junior Photographic Export Group

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