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WorksheetsN5 Computer Systems Set A
Total questions: 110
Worksheet time: 55mins
Name
Class
Date
1.
What are the only symbols you can use in binary?
a)
0 and 1
b)
0, 1, 2, 3, 4, 5, 6, 7, 8, 9
c)
1, 2, 4, 8, 16
d)
1 and 2
2.
What is the denary number system?
a)
Our usual base 10 number system
b)
A special number system for computers
c)
It counts the number of dens
d)
De Nary's number system
3.
True or False: The binary number for a capital 'Z' is the same as the binary number for a lower-case 'z'?
a)
True
b)
False
4.
What kind of data does a computer represent with binary?
a)
everything
b)
numbers
c)
letters
d)
pictures
5.
What is the binary number 0100 as a denary number?
a)
4
b)
10
c)
1
d)
2
6.
What is the binary number 00111111 as a denary number?
a)
63
b)
31
c)
127
d)
11
7.
How many bytes are needed store the word "Goodbye" in ASCII?
a)
7
b)
1
c)
14
d)
8
8.
In 0.432 x 10^5 what is the mantissa?
a)
6734
b)
5
c)
432
d)
10
9.
In 0.432 x 10^5 what is the exponent?
a)
5
b)
10
c)
6734
d)
4
10.
What is the number 40 as a binary number?
a)
10100
b)
100100
c)
10011
d)
11000
11.
What is the most common format for text files in computers and on the Internet?
a)
ASCII
b)
Unicode
c)
Word
d)
String
12.
What does CPU stand for?
a)
Central Processing Unit
b)
Central Primary Unit
c)
Connected Portal Unit
d)
Control Panel Unit
13.
What does RAM stand for?
a)
Random Access Memory
b)
Read Access Memory
c)
Red And Mad
d)
Random Ability Memory
14.
Which graphic format is made using rectangles, ellipses and lines?
a)
Vector
b)
Bitmap
15.
Which graphic is made up of blocks of colour known as pixels?
a)
Bitmap
b)
Vector
16.
Logos & simple cartoons are examples of...
a)
Vector Graphics
b)
Bitmap Images
17.
Digital photos and online pictures are examples of...
a)
Bitmap Images
b)
Vector Graphics
18.
How many colours can an image with a colour depth of 3 have?
a)
8
b)
3
c)
100
d)
4
19.
How many pixels does an image with 8 pixels across and 10 pixels down have?
a)
80
b)
800
c)
8
d)
10
20.
What is a real number?
a)
Any number with a decimal point
b)
A whole number
c)
An integer
d)
A binary number
21.
What does a computer use floating point representation for?
a)
Images
b)
Text
c)
Integers
d)
Real Numbers
22.
How does a computer store real numbers?
a)
Computers can't store real numbers.
b)
As text in ASCII.
c)
Using floating point representation.
d)
As a decimal number
23.
What is binary?
a)
A number system made up of 1s and 0s.
b)
Our usual base 10 number system
c)
A number system made up of 0 to 9.
d)
A number system made up of 0 to F.
24.
What is a character?
a)
A letter, symbol or number
b)
A letter
c)
A symbol
d)
A number or digit.
25.
How many bits are used to store a character in ASCII?
a)
1
b)
2
c)
8
d)
16
26.
How many bytes are used to store a character in ASCII?
a)
1
b)
2
c)
8
d)
16
27.
Choose a result of increasing the number of pixels in a bitmap.
a)
Better quality
b)
Poorer Quality
28.
Choose a result of decreasing the number of pixels in a bitmap.
a)
Better quality
b)
Poorer Quality
29.
Choose a result of increasing the number of pixels in a bitmap.
a)
Bigger file size
b)
Smaller file size
30.
Choose a result of decreasing the number of pixels in a bitmap.
a)
Bigger file size
b)
Smaller file size
31.
What is resolution in a bitmap?
a)
The number of pixels (across and down)
b)
The quality
c)
The file size
32.
What is bit depth in a bitmap?
a)
The number of bits used to store the colours.
b)
The quality of the colour.
c)
The file size
d)
The number of pixels
33.
Choose a result of increasing the number of colours in a bitmap.
a)
Better quality
b)
Poorer Quality
34.
Choose a result of decreasing the number of colours in a bitmap.
a)
Better quality
b)
Poorer Quality
35.
How does a computer store vector graphics?
a)
As shapes and lines.
b)
As pixels
c)
As blocks of colour.
36.
How does a computer store bitmaps?
a)
As shapes and lines.
b)
By describing the graphic in a special language.
c)
As blocks of colour known as pixels.
37.
Which one is NOT an element of a vector graphic?
a)
Ellipse
b)
Rectangle
c)
Line
d)
Image
38.
What is a polygon?
a)
Any shape with straight sides
b)
An eight-sided shape
c)
A nine-sided shape
d)
A three-dimensional shape
39.
In vector graphics, which one is an attribute?
a)
stroke
b)
fill
c)
co-ordinates
d)
All of these
40.
In vector graphics, what is stroke?
a)
The colour of the line(s)
b)
The colour inside the shape
c)
The co-ordinates
d)
The position of the shape
41.
In vector graphics, what is fill?
a)
The colour of the line(s)
b)
The colour inside the shape
c)
The co-ordinates
d)
The position of the shape
42.
In vector graphics, which attribute does NOT apply to a line?
a)
stroke
b)
fill
c)
co-ordinates
d)
None of these
43.
In vector graphics, which attribute is the colour of the lines?
a)
stroke
b)
fill
c)
co-ordinates
d)
All of these
44.
In vector graphics, which attribute is the colour of the middle of a shape?
a)
stroke
b)
fill
c)
co-ordinates
d)
All of these
45.
In vector graphics, which attributes descibe the position of a shape?
a)
stroke
b)
fill
c)
co-ordinates
d)
All of these
46.
In ASCII what do the first 32 characters represent?
a)
control characters
b)
printable characters
c)
extended characters
d)
UNICODE characters
47.
In ASCII what do we call the characters from space (ASCII 32) to ~ (ASCII 126) represent?
a)
control characters
b)
printable characters for American English
c)
extended characters
d)
UNICODE characters
48.
In ASCII what do the final 128 characters (ASCII 128-255) represent?
a)
control characters
b)
printable characters
c)
extended characters (required for European languages)
d)
UNICODE characters
49.
What is an input device?
a)
Something that lets us put data into a computer.
b)
Something that lets us get data out of a computer.
c)
Something that lets us store computer data.
50.
What is an output device?
a)
Something that lets us put data into a computer.
b)
Something that lets us get data out of a computer.
c)
Something that lets us store computer data.
51.
What is a storage device?
a)
Something that lets us put data into a computer.
b)
Something that lets us get data out of a computer.
c)
Something that lets us store computer data.
52.
In a computer, what is the Central Processing Unit?
a)
The chip that carries out all the processes.
b)
The working memory of a computer that holds all the programs and data while the computer is switched on.
c)
The wires that carry data round the computer.
d)
The place programs and data are stored while the computer is OFF.
53.
In a computer, what is RAM?
a)
The chip that carries out all the processes.
b)
The working memory of a computer that holds all the programs and data while the computer is switched on.
c)
The wires that carry data round the computer.
d)
The place programs and data are stored while the computer is OFF.
54.
In a computer, what is a bus?
a)
The chip that carries out all the processes.
b)
The working memory of a computer that holds all the programs and data while the computer is switched on.
c)
The wires that carry data round the computer.
d)
The place programs and data are stored while the computer is OFF.
55.
In a computer, what is a hard drive?
a)
The chip that carries out all the processes.
b)
The working memory of a computer that holds all the programs and data while the computer is switched on.
c)
The wires that carry data round the computer.
d)
The place programs and data are stored while the computer is OFF.
56.
What do we call a device that lets us put data into a computer?
a)
An input device
b)
An output device
c)
A storage device
57.
What do we call a device that lets us get data out of a computer?
a)
An input device
b)
An output device
c)
A storage device
58.
What do we call a device that we save computer data or programs to?
a)
An input device
b)
An output device
c)
A storage device
59.
Inside a computer, what is the name of the chip that runs the programs?
a)
The CPU (Central Processing Unit)
b)
RAM
c)
A bus
d)
Hard drive
60.
Inside a computer, what is the name of the memory used while the computer is switched on?
a)
The CPU (Central Processing Unit)
b)
RAM
c)
A bus
d)
Hard drive
61.
Inside a computer, what do we call the wires that carry data around?
a)
The CPU (Central Processing Unit)
b)
RAM
c)
A bus
d)
Hard drive
62.
Inside a computer, what is the device that stores data while the computer is off?
a)
The CPU (Central Processing Unit)
b)
RAM
c)
A bus
d)
Hard drive
63.
Why do we need to save our programs and data?
a)
Because the CPU doesn't work while the computer is switched off.
b)
Because data in RAM is lost when the computer is switched off.
c)
Because data on a hard drive is lost when the computer is switched off.
d)
Because the bus doesn't work while the computer is switched off.
64.
Which one is NOT true about RAM?
a)
It has thousands of storage locations.
b)
It stores program instructions while the computer is on.
c)
It stores data while the computer is on.
d)
It stores data and programs while the computer is off.
65.
What are the two main buses inside a computer?
a)
Address Bus and Data Bus
b)
Address Bus and RAM
c)
RAM and CPU
d)
CPU and Data Bus
66.
True or False: The data bus is two-way?
a)
True
b)
False
67.
True or False: The data bus carries data into and out of the CPU?
a)
True
b)
False
68.
True or False: The address bus is two-way?
a)
True
b)
False
69.
True or False: The address bus holds locations in memory?
a)
True
b)
False
70.
Data travelling on a bus is stored as …
a)
Binary
b)
Denary
c)
ASCII
d)
Pixels
71.
Data and programs are stored on a hard drive as …
a)
Binary
b)
Denary
c)
ASCII
d)
Pixels
72.
Data and programs are stored in RAM as …
a)
Binary
b)
Denary
c)
ASCII
d)
Pixels
73.
Inside a computer, what is a bus made up of?
a)
3 wires together, Live, Earth and Neutral
b)
Lots of tiny wires stuck together
c)
Ethernet cable
d)
You can't see a bus.
74.
What does each line/wire in a bus carry?
a)
One bit
b)
One byte
c)
One instruction
d)
One passenger
75.
In a bus, the number of lines is the number of bits carried at once.
a)
True
b)
False
76.
In the address bus, the number of lines affects…
a)
The number of memory locations there are.
b)
The size of each memory location.
c)
The number of chips.
d)
The size of the data
77.
In the data bus the number of lines affects…
a)
The number of memory locations there are.
b)
The size of each memory location.
c)
The number of chips.
d)
The size of the memory
78.
Which one is NOT a part of a CPU?
a)
Control Unit
b)
Registers
c)
Arithmetic and Logic Unit (ALU)
d)
Bus
79.
What is a control unit?
a)
Another name for the CPU
b)
The part of the CPU that controls the internal clock and carries out instructions.
c)
A bus
d)
The part of the CPU that does arithmetic and logic.
80.
What does ALU stand for?
a)
Arithmetic and Logic Unit
b)
Arithmetic and Language Unit
c)
Access Logic Unit
d)
Another Logic Unit
81.
What is an ALU?
a)
Another name for the CPU
b)
The part of the CPU that controls the internal clock and carries out instructions.
c)
A bus
d)
The part of the CPU that does arithmetic and logic.
82.
Which part of the CPU makes sure operations are carried out in order and in time?
a)
Control Unit
b)
Registers
c)
Arithmetic and Logic Unit (ALU)
d)
Something else.
83.
Which part of the CPU carries out adding and subtracting operations?
a)
Control Unit
b)
Registers
c)
Arithmetic and Logic Unit (ALU)
d)
Something else.
84.
Which part of the CPU carries out logical operations like AND/OR/NOT?
a)
Control Unit
b)
Registers
c)
Arithmetic and Logic Unit (ALU)
d)
Something else.
85.
Which part of the CPU stores the instructions, memory location and data being currently processed?
a)
Control Unit
b)
Registers
c)
Arithmetic and Logic Unit (ALU)
d)
Something else.
86.
Which part of the CPU stores the instructions being currently processed?
a)
Control Unit
b)
Registers
c)
Arithmetic and Logic Unit (ALU)
d)
Something else.
87.
Which part of the CPU stores the memory locations being currently accessed?
a)
Control Unit
b)
Registers
c)
Arithmetic and Logic Unit (ALU)
d)
Something else.
88.
Which part of the CPU stores the data being currently processed?
a)
Control Unit
b)
Registers
c)
Arithmetic and Logic Unit (ALU)
d)
Something else.
89.
Which part of the CPU sends out a constant clock pulse?
a)
Control Unit
b)
Registers
c)
Arithmetic and Logic Unit (ALU)
d)
Something else.
90.
What does a CPU register hold?
a)
a single instruction
b)
a single memory address
c)
a single piece of data
d)
Any one of these.
91.
Where does the CPU hold the instruction it is currently processing?
a)
In a register
b)
In RAM
c)
On the Hard Drive
92.
Where does the CPU hold the data it is currently processing?
a)
In registers
b)
In RAM
c)
On the Hard Drive
93.
Where does the CPU hold the memory locations it is currently processing?
a)
In registers
b)
In RAM
c)
On the Hard Drive
94.
Does using a computer affect the environment?
a)
Yes
b)
No
95.
What kind of power do computers need to run?
a)
Electricity
b)
Gas
c)
Water
d)
Kinetic Energy
96.
Does a device use any power when it is on stand-by?
a)
No
b)
Yes, but less than if it is on.
c)
Yes, as much as when it is on.
d)
Yes, more than when it is on.
97.
What setting can reduce the energy a hard-drive uses?
a)
Power Up
b)
Power Down
c)
Stand-by
d)
None of these
98.
Can a computer do anything while the harddrive is powered down?
a)
Yes, because the programs and data being worked on are in memory.
b)
No, because the data is on the hard-drive.
c)
No, because the programs are on the hard-drive.
d)
Yes, because the programs and data being worked on are in the CPU.
99.
Which operation needs the hard-drive to be on?
a)
Saving
b)
Logic (AND, OR, NOT)
c)
Pressing the power button
d)
Arithmetic (+,-,*,/)
100.
What does a firewall do?
a)
Stops unauthorised users getting in.
b)
Stops fire in a computer.
c)
Stops viruses getting in.
d)
Stops spam getting in.
101.
Is a firewall hardware or software?
a)
Hardware
b)
Software
c)
Either hardware or software.
102.
Does a firewall protect a network or a single computer?
a)
A network
b)
A single computer
c)
Either a network or a single computer.
103.
How does a firewall protect a network from specific computers?
a)
By checking IP Addresses.
b)
By closing ports
c)
By opening ports
d)
By stopping games
104.
What do we call the settings that block or allow specific computers, ports or programs?
a)
Firewall Checks
b)
Firewall Rules
c)
Firewall Laws
d)
Firewall Regulations
105.
What is encryption?
a)
Encoding data so it cannot be read without the right key.
b)
Putting a wall round data so it cannot be accessed.
c)
Obfuscating data
d)
Entombing data
106.
What does encrypted data look like?
a)
A wordsearch - The words are embedded in lots of random text
b)
Nonsense - just a jumble of characters
c)
Some of the letters are changed.
d)
The letters aren't changed, just mixed up.
107.
Why do we encrypt data?
a)
To stop people reading it.
b)
To make it shorter to download.
c)
To attach it to an email.
d)
To compress it
108.
Can encrypted words have symbols in them?
a)
Yes
b)
No
109.
Can encrypted words have non-printable characters in them?
a)
Yes
b)
No
110.
What is decryption?
a)
Decoding encrypted data so it can be read.
b)
Encoding data so it cannot be read.
c)
Obfuscating data
d)
Destroying data
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