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CS IGCSE Term 1 Theory recap 100Q

Total questions: 100

Worksheet time: 52mins

Name
Class
Date
1.

ASCII is an encoding system for text. What does ASCII stand for?

a)

American Standard Code for Information Interchange

b)

All System Code In Internet

c)

American Simple Code for Interesting Information

d)

Alpha Super Code Input Information

2.

How many bits was used to encode the original ASCII character set?

a)

7

b)

8

c)

16

d)

4

3.

If 097 is the ASCII code for lower case 'a', which is the correct encoding of the text "The quick brown fox"

a)

084 104 101 032 113 117 105 099 107 032 098 114 111 119 110 032 102 111 120

b)

067 117 114 105 111 117 115 032 103 114 101 101 110 032 105 100 101 097 115

c)

067 111 109 112 117 116 105 110 103 032 105 115 032 099 111 111 108 033 033

d)

084 104 101 032 115 108 111 119 032 111 108 100 032 104 111 114 115 101 032

4.

CPUs only run programs written in

a)

Machine code

b)

Python

c)

Java

d)

C

5.
Transmission where data can only be sent in one direction only e.g. a computer to a standard monitor. 
a)
Simplex
b)
Duplex
c)
Serial
d)
Parallel
6.
Data transmission in both directions simultaneously.
a)
Full Duplex
b)
Double Duplex
c)
Half Duplex
d)
Parallel Duplex
7.
The rules that specify how data is transmitted.
a)
Protocols
b)
Parallels
c)
Bandwidth
d)
Mulitiplexers
8.
The data transfer rate of a network.
a)
Bandwidth
b)
Broadband
c)
Capacity
d)
Topology
9.
Data transmission where data is transferred one bit at a time.
a)
Serial
b)
Parallel
c)
Simplex
d)
Half Simplex
10.
Data transmission where several bits of data (usually one byte) are transferred simultaneously.  
a)
Parallel
b)
Serial
c)
Full Duplex
d)
Multi-Duplex
11.
What does USB stand for?
a)
Universal Serial Bus
b)
Universal Simplex Bandwidth 
c)
Universal Serial Broadband
d)
Universal Simplex Bus
12.
Which of these is not a cable used to transfer data?
a)
HTTP
b)
USB
c)
HDMI
d)
UTP
13.
Which of these is not a network protocol?
a)
HTTP
b)
POP3
c)
Ethernet
d)
HDMI
14.
Parallel data transmission would most likely be used for?
a)
Sending Data to a Printer
b)
Saving Work on a USB Flash Drive
c)
Streaming a Movie
d)
Sending an Email
15.
Which of the following devices broadcasts a signal to all other devices on a network?
a)
A Hub
b)
A Switch
c)
A Gateway
d)
A Server
16.
What is the name for any device connected to a network? 
a)
Node
b)
Server
c)
Workstation
d)
Hub
17.
Which device routes a data packet to the specific node to which it is addressed?
a)
A Switch
b)
A Bridge
c)
A Hub
d)
A Server
18.
Before sending data over a network it is divided into small chunks named?
a)
Packets
b)
Blocks
c)
Bytes
d)
Packages
19.
A device used to connect two networks that have different protocols.
a)
A Gateway
b)
A Bridge
c)
A Switch
d)
A Server
20.
A type of server used to monitor data entering and leaving the network.
a)
Proxy
b)
Virus
c)
File
d)
Gateway
21.

Data is trasmitted one bit at a time down a single wire, the data is transmitted in both directions but not at the same time.

a)

Simplex

b)

Half-duplex

c)

Full-duplex

22.

What is structure used for in a HTML document?

a)

CSS: To format/style the page

b)

HTML: To create a layout for the page & add content

23.

What is presentation used for in a HTML document?

a)

CSS: To format/style the page

b)

HTML: To create a layout for the page & add content

24.

True or False? Structure and Presentation in a HTML document are kept seperate

a)

True

b)

False

25.

.JPEG is an example of a compressed file format

a)

True

b)

False

26.

.GIF is an example of a compressed file format

a)

True

b)

False

27.

.PNG is an example of a compressed file format

a)

True

b)

False

28.

.WAV is an example of a compressed file format

a)

True

b)

False

29.

.MP3 is an example of a compressed file format

a)

True

b)

False

30.

Which one of these are lossy file formats?

a)

JPEG, MP3, MP4, ZIP

b)

PNG, BMP, WAV

31.

Which one of these are lossless file formats?

a)

JPEG, MP3, MP4, ZIP

b)

PNG, BMP, WAV

32.

Which is an example of using hexadecimals in computer science?

a)

MAC addresses

b)

URL

c)

File types

33.

Which is an example of using hexadecimals in computer science?

a)

URL

b)

HTML/CSS

c)

File types

34.

True or False? We use hexadecimal numbers in computer science because we can represent 16 bit words as 4 hexadecimal digits

a)

True

b)

False

35.

True or False? We use hexadecimal numbers in computer science because its easy to convert hex back to binary if necessary

a)

True

b)

False

36.

Hardware identification number that uniquely identifies each device on a network.

a)

IP address

b)

MAC address

c)

Internet Service Provider

37.

Location of a device on a network

a)

IP address

b)

MAC address

c)

Internet Service Provider

38.

Company that provides individuals access to the internet

a)

IP address

b)

MAC address

c)

Internet Service Provider

39.

An even parity check was used here. Is this correct? 10011100

a)

Correct

b)

Incorrect

40.

An odd parity check was used here. Is this correct? 10011100

a)

Correct

b)

Incorrect

41.
Which of these input signals is a digital quantity?
a)
thermometer
b)
light sensor
c)
live music
d)
webcam
42.
Computers use binary to represent data and programs because ...
a)
CPUs have millions of transistors which have two possible states
b)
Boolean logic only has two possible states
c)
Alan Turing suggested that in an academic paper
d)
it's a simpler system than decimal
43.

What is the binary number 10101 in decimal?

a)

1000

b)

8

c)

21

d)

15

44.

Which is the binary version of 13?

a)

1111

b)

1110

c)

1101

d)

1001

45.

With 6 bits of data how many different items of data can be represented?

a)

64

b)

32

c)

128

d)

6

46.

How many bits are there in one byte of data?

a)

8

b)

2

c)

10

d)

1000

47.

How many bits of data do you need to represent 512 different values?

a)

9

b)

512

c)

8

d)

10

48.

Which is the character set of the hexadecimal number system?

a)

0, 1

b)

0, 1, 2, 3, 4, 5, 6, 7, 8, 9

c)

0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16

d)

0, 1, 2, 3, 4, 5, 6, 7, 8, 9, A, B, C, D, E, F

49.

Choose all the Boolean logic gates ...

a)

NOT

b)

AND

c)

BUT

d)

XOR

50.

Truth table for AND gate?

a)
b)
c)
d)
51.

Truth table for OR gate?

a)
b)
c)
d)
52.

Which logic gate is this truth table for?

a)

AND

b)

OR

c)

NOR

d)

XOR

53.

If x = 3 and y = 5, choose all the statements that evaluate to True.

a)

x < y

b)

y > x**2

c)

2 * x == y

d)

y % x == 3

54.

What is the correct order of precedence for logical operations?

a)

(brackets) NOT AND OR

b)

(brackets) NOT OR AND

c)

(brackets) OR AND NOT

d)

NOT (brackets) OR AND

55.

Which word best completes this sentence:


Data that is Boolean can only take two values: True _____ False.

a)

and

b)

or

c)

not

56.

Which word best completes this sentence:


A logic gate is a tiny electronic component on a chip that has inputs and ______ to simulate a Boolean operation.

a)

output

b)

result

c)

data

d)

processing

57.

Which word best completes this sentence?


A combination of logic gates is known as a logic _______.

a)

circuit

b)

program

c)

array

d)

truth table

58.

A logic gate that outputs True only if both its inputs are also True?

a)

OR

b)

AND

c)

XOR

d)

NAND

59.

Processors don’t do the following

a)

Operate in Hz

b)

Execute Data

c)

Execute Instructions

d)

Process Data

60.

What acts as an intermediary between the processor and the Main Memory?

a)

Clock

b)

Cache

c)

Bus

d)

User

61.

This holds the number of the current instruction being worked on

a)

Memory Address Register

b)

Program Counter

c)

Memory Data Register

d)

Accumulator

62.

This sends signals such as “Memory write”

a)

Control Unit

b)

Cache

c)

Arithmetic Logic Unit

d)

Accumulator

63.

What is transferred down the data bus?

a)

Data only

b)

Addresses only

c)

Data

d)

Instructions and Addresses

e)

Data and Instructions

64.
A multi-core processor is?
a)
Two or more cache units inside a CPU.
b)
Multiple clock speed CPU
c)
Two or more processors inside a CPU.
d)
Multiple counter systems inside the CPU.
65.
Who developed the idea of a stored program computer and modern computer architecture?
a)
John Von Neumann
b)
Bill Gates
c)
Steve Jobs
d)
Tim Berners-Lee
66.
What connects the processor and memory?
a)
Buses
b)
Cache
c)
NIC
d)
Control Unit
67.
What are the 3 parts of the Von Neumann computer architecture?
a)
Processor (CU & ALU), Memory Unit & Input/Output
b)
Processor, RAM & ROM
c)
Processor, RAM & Hard Disk
d)
Memory (CU & ALU), Hard Disk & Input/Output
68.

Generally Used for taking a HARD COPY (paper) as INPUT to convert into electronic form to be stored in the computer.

(a)  

69.

It is another type of Barcode that is made up of a matrix of filled-in dark squares on light background

(a)  

70.

It is a input device that can read or measure physical quantities in ANALOGUE FORM.

(a)  

71.

-------- is an OUTPUT device that is an integral part of a control system

(a)  

72.

Device that recognises human physical characteristics, such as fingerprints

a)

AVR

b)

Biometric devices

c)

2D scanner

73.

A device that converts analogue data to digital

a)

MODEM

b)

ADC

c)

COMPILER

d)

BINARY CONVERTER

74.

Use of software to convert spoken words into text.

a)

Microphone

b)

Voice control

c)

Voice recognition

d)

stylus

75.

Which of these is a Hard Disk Drive (HDD)?

a)
b)
c)
d)
76.

Which of these are magnetic storage devices?

a)
b)
c)
d)
e)
77.

Solid state storage has no moving parts?

a)

True

b)

False

78.

Which type of storage uses a laser?

a)

Magnetic

b)

Optical

c)

Solid State

79.

Which of the following storage devices is most suitable for use in mobile devices?

a)

Cloud

b)

Magnetic

c)

Solid State

d)

Optical

80.

Which of the following is most commonly found in PCs?

a)

Solid State Storage

b)

Magnetic Storage

c)

Cloud Storage

d)

Optical Storage

81.
What type of device is this? USB memory stick
a)
Input
b)
Output
c)
Storage
82.

A CD has one long track on it full of ...

a)

Grooves and pot holes

b)

Pits and Lands

c)

Bumps and Dots

d)

Dots and Grooves

83.
Optical device, fairly fragile, easy to snap or scratch.
a)
Flash memory
b)
Magnetic Tape
c)
CD
d)
Hard disk
84.
This storage device needs a computer with a specific  drive in order to read the disk. Cannot be read by a CD drive or DVD drive.  Used for high definition films.
a)
Blu-ray
b)
CD
c)
DVD
d)
Bluetooth
85.
Same as 1,024 GB
a)
1 TB
b)
1 GB
c)
1MB
d)
1 KB
86.
Very portable as it is designed to be fitted into small electronic devices.
a)
Flash memory devices
b)
Internal hard disk
c)
Magnetic tape
d)
Server
87.

A preventive measure for protecting your computer is:

a)

Backing up your data

b)

Installing anti-virus software

c)

Using firewall protection

d)

All of the above

88.

True or False: Always check the validity and reliability of any information you obtain from the Internet.

a)

True

b)

False

89.

The end goal of green computing is for consumers to reduce the amount of _______________ and ______________ while using a computer.

a)

hackers and phishers

b)

electricity and viruses

c)

environmental waste and spam

d)

electricity and environmental waste

90.

What is information privacy?

a)

The right of individuals and companies to let the government access all of your personal information

b)

The right of individuals and companies to deny or restrict the collection and use of information about them

c)

The right of individuals and companies to censor others for expressing their own opinions about them

d)

The right of individuals and companies to deny or restrict their First amendment rights.

91.

A cyber attack that redirects users to a fake website is known as:

a)

Phishing

b)

Pharming

c)

Spoofing

d)

TikToking

92.
Involve right and wrong; relates to issues of right and wrong and how individual people should behave
a)
Behavior
b)
Morals
c)
Ethics
d)
Etiquette
93.
Code of morals of a particular person, group, or profession 
a)
Behavior
b)
Morals
c)
Ethics
d)
Etiquette
94.
Governs the usage or redistribution of copyright protected software 
a)
Software Licence
b)
Site Licence
c)
Shareware
d)
Free ware
95.
A license to use software on multiple computers (like in a school lab or a business) 
a)
Software Licence
b)
Site Licence
c)
Shareware
d)
Free ware
96.
The author (owner) will let you download it, and if you like it and want to use it, you are expected to pay a fair price for it  
a)
Software Licence
b)
Site Licence
c)
Shareware
d)
Free ware
97.
Software you can download and use for free 
a)
Software Licence
b)
Site Licence
c)
Shareware
d)
Free ware
98.
Copying and using commercial software purchased by someone else 
a)
Unauthorized Use
b)
Software Piracy
c)
Plagiarism
d)
Fair Use
99.
Using a portion or piece of writing that has been copied from someone else and presenting it as your own work 
a)
Unauthorized Use
b)
Software Piracy
c)
Plagiarism
d)
Fair Use
100.
The exclusive privilege that allows an author or owner to print or sell his/her own work 
a)
Fair Use
b)
Copyright
c)
Shareware
d)
Unathorized Use

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