WorksheetsS1 Computer Science Assessment 3 2025
Total questions: 75
Worksheet time: 1hrs 15mins
What is the maximum number of states that can be represented by a binary pattern of 8 bits?
128
256
1024
512
What is the decimal equivalent of the 8-bit binary number 10101010?
42
85
170
240
What is the concept of overflow in relation to the number of bits available to store a value?
The value is exactly the same as the maximum representable value
The value exceeds the maximum representable value
The value is less than the minimum representable value
The value is exactly the same as the minimum representable value
How are bitmap images represented in binary in terms of resolution?
By the sample rate
By the number of pixels
By the color depth
By the bit depth
What is the need for data compression?
To slow down data transmission
To reduce the amount of space required to store data
To increase data capacity requirements
To increase file size
What is the unit of data storage that is equivalent to 1024 bytes?
Tebibyte
Mebibyte
Kibibyte
Gibibyte
What is the purpose of data types in programming?
Data types are used to determine the color of text in programming
Data types in programming are used to define the type of data that a variable can hold.
Data types are used to define the size of images in programming
Data types are used to control the speed of animations in programming
What is the syntax for declaring an integer variable in Python?
int variable_name = 0
variable_name = 0
variable_name = '0'
variable_name == 0
Which of the following is a characteristic of lossy data compression?
Data is stored in a text format
Data size increases after compression
Some data is lost during compression
Data can be perfectly reconstructed
How many different values can be represented with a 3-bit binary number?
10
8
6
4
What is the binary representation of the decimal number 45?
110101
101101
100101
111001
How many bits are required to represent the decimal number 255 in binary?
8 bits
9 bits
7 bits
6 bits
What is sampling?
The number of bits used to represent the sound
Turning a microphone on and off to only record sound at certain times
Taking measurements of a wave at regular intervals
Combining two sound waves into one
What is sample rate?
The number of bits used for a sample
How many times a sound wave goes up and down
How fast a sound wave moves
How many samples you take each second
What is sample rate measured in?
bits
Hertz
Kbps
Decibels
If the sample rate and sample resolution are increased, what happens to the sound file?
Quality goes up. Size of the file goes up.
Quality goes down. Size of the file goes down.
Quality goes down. Size of the file goes up.
Quality goes up. Size of the file goes down.
What is used to convert a sound wave in to a digital format?
A sound wave converter
A router
An amplitude to digital converter
Analogue to digital converter
What is the sample rate?
The number of times a sound wave is sampled per second
The number of bits used to store each sample
How loud a sound is
The size of the sound wave
What is sample rate measure in?
Bits
Hertz
GB
amps
What is amplitude?
Number of samples taken
The number of bits per sample
The height of the sound wave
The pitch
What does IDE stand for?
Intelligent Development Environment
Integrated Design Environment
Intelligent Development Environment
Integrated Development Environment
Putting commands in correct order so computers can read the commands
loop
repeat
debugging
sequencing
A placeholder for a piece of information that can change.
constant
variable
until
function
Computational Thinking is a _________________________ process.
programming
design
constructionist
problem-solving
Finding similarities and differences between parts of a problem is known as ____________.
Pattern recognition
Decomposition
Algorithm design
Abstraction
What would you store using the Char data type?
A cartoon character such as Daffy Duck
A string such as PIG
An integer such as 17
A single character such as T
How do we get user input from the keyboard?
input = (What is your name?)
input = What is your name?
output = ("What is your name?")
input("What is your name? ")
Which data type is the most suited to store a telephone number in a variable?
string
integer
float
boolean
What does the print command do?
Outputs a hard copy of a program to a printer
Outputs a message on screen
Print a hard copy of a flow chart to a printer
Prints out the the commands line by line on the screen
what does != mean
not
swap value
not equal
equal
What does BIT stand for?
Binary Integrated Technology
Binary Digit
Binary Instruction Terminology
Binary Intermittent Time
How many Bits are in a Byte
2
4
10
8
What can a bit hold?
1 and 0
1 or 0
How many bits are in a nibble?
8
4
2
10
Hexadecimal numbers are...
base 12
base 14
base 16
base 18
How are bitmap images represented in binary in terms of resolution?
By the sample rate
By the number of pixels
By the color depth
By the bit depth
Giving a value to a variable is know as what
Assignment
Casting
Concatenation
Input Sanitisation
Concatenation is...
Stripping characters from text
Concentrating very hard on coding
Joining together two or more strings
Changing an number to text
A string data type hold what type of data?
Whole number
A group of characters
Single Character
True/ False
A boolean data type hold what type of data?
Whole number
A group of characters
Single Character
True/ False
"A named place to store a value that can change" is called a ...
Subroutine
Variable
Constant
Operator
Which python statement assigns a numerical value input by a user and stores it in a variable of data type integer
num = input("Enter a number")
num = str(input("Enter a number"))
num = int(input("Enter a number"))
input("Enter a number") = num
Which arithmetic operator is used to find the remainder from a division?
DIV
^
MOD
+
What will 23 DIV 4 return?
6
3
5
4
What is the formula for finding a sound files size?
size = rate * bits * seconds
size = rate * bits * minutes
size = amplitude * bits * seconds
size = sample * frequency * bits
The resolution of an image is the...
number of dots per unit, e.g. the number of dots per inch (usually called dots per inch or 'dpi')
number of pixels per unit, e.g. the number of pixels per inch (usually called dots per inch or 'dpi')
number of pixels per unit, e.g. the number of dots per inch (usually called dots per inch or 'dpi')
A pixel is one dot in an image. The number of bits per pixel determines...
how many colours each dot can represent
how many dots each dot can represent
how many shades each dot can represent
how many pixels each dot can represent
