Data Types in Information Technology: A Comprehensive Guide for Sixth Form Students

Question 1

Which data type in Python is used to represent whole numbers?

Accepted Answer

Int

Answer

Float

Answer

String

Answer

Boolean

Question 2

What data type should be used to store a student's name?

Accepted Answer

String

Answer

Integer

Answer

Floating-point number

Answer

Boolean

Question 3

Which of the following is NOT a primitive data type in Information Technology?

Accepted Answer

Array

Answer

Integer

Answer

Floating-point number

Answer

Character

Question 4

What is the range of values that can be stored in a 16-bit unsigned integer?

Accepted Answer

0 to 65,535

Answer

0 to 32,767

Answer

-32,768 to 32,767

Answer

-65,536 to 65,535

Question 5

What is the primary purpose of type casting in a programming language?

Accepted Answer

To convert a value from one data type to another

Answer

To check the data type of a value at runtime

Answer

To allocate memory for a variable

Answer

To define a new data type

Question 6

What is the key difference between a character and a string?

Accepted Answer

A character is a single letter, while a string is a sequence of characters

Answer

A string is a single letter, while a character is a sequence of characters

Answer

Characters and strings are essentially the same thing

Answer

A character is a number, while a string is a sequence of characters

Question 7

Which operator is used in Python to concatenate two strings?

Accepted Answer

+

Answer

*

Answer

&

Answer

|

Question 8

What is the range of values that can be represented by an 8-bit signed integer?

Accepted Answer

-128 to 127

Answer

0 to 255

Answer

-32,768 to 32,767

Answer

0 to 65,535

Question 9

Which data type is most suitable for representing real numbers with fractional parts?

Accepted Answer

Floating-point number

Answer

Integer

Answer

String

Answer

Character

Question 10

How does a string differ from a character?

Accepted Answer

A string is a sequence of characters, while a character is an individual character.

Answer

A character is a sequence of strings, while a string is an individual character.

Answer

There is no difference between a string and a character.

Answer

A string is a primitive data type, while a character is an object.

Question 11

What is the primary purpose of type casting in programming?

Accepted Answer

Converting a value from one data type to another

Answer

Determining the data type of a value

Answer

Storing a value in a specific data type

Answer

Deleting a value from a data type

Question 12

What is the primary purpose of type casting?

Accepted Answer

To change the data type of a value.

Answer

To improve code performance.

Answer

To prevent type errors.

Answer

To make code more readable.

Question 13

What is the main distinction between a mutable and immutable data type?

Accepted Answer

Mutable data types can be changed after creation, while immutable data types cannot.

Answer

Immutable data types can be changed after creation, while mutable data types cannot.

Answer

There is no difference between mutable and immutable data types.

Answer

Mutable data types are stored in the heap memory, while immutable data types are stored in the stack memory.

Question 14

Which of the following is an example of a mutable data type in Python?

Accepted Answer

List

Answer

Integer

Answer

String

Answer

Tuple

Question 15

Which data type is appropriate for storing a person's age, which is a whole number?

Accepted Answer

Integer

Answer

Float

Answer

String

Answer

Boolean

Question 16

In Python, which operator is used to combine two strings?

Accepted Answer

+

Answer

*

Answer

/

Answer

%

Question 17

In Python, what is the default data type of a variable if no type annotation is provided?

Accepted Answer

Dynamic

Answer

Integer

Answer

Float

Answer

String

Question 18

What is the maximum value that can be stored in a byte data type?

Accepted Answer

255

Answer

127

Answer

32767

Answer

2147483647

Question 19

Which data type is used to represent real numbers?

Accepted Answer

float

Answer

int

Answer

char

Answer

boolean

Question 20

What is the difference between a signed and an unsigned data type?

Accepted Answer

Signed data types can represent negative values, while unsigned data types cannot.

Answer

Unsigned data types can represent larger values than signed data types.

Answer

There is no difference between signed and unsigned data types.

Answer

Signed data types are stored in little-endian format, while unsigned data types are stored in big-endian format.

Question 21

What is the purpose of type casting?

Accepted Answer

To convert a value from one data type to another.

Answer

To check the data type of a value.

Answer

To assign a value to a variable of a different data type.

Answer

To create a new data type.

Question 22

Which of the following is a valid way to declare a 2D array in Java?

Accepted Answer

int[][] array = new int[3][4];

Answer

int array[3][4];

Answer

int[] array = new int[3, 4];

Answer

int[] array[3, 4];

Question 23

Which of the following is not a primitive data type in Python?

Accepted Answer

List

Answer

Integer

Answer

String

Answer

Boolean

Question 24

What is the range of values that can be represented by a 32-bit signed integer?

Accepted Answer

-2^31 to 2^31-1

Answer

-2^32 to 2^32-1

Answer

-2^64 to 2^64-1

Answer

-2^16 to 2^16-1

Question 25

Which operator can be used to concatenate strings in Python?

Accepted Answer

+

Answer

*

Answer

/

Answer

%

Question 26

What is the purpose of the 'type()' function in Python?

Accepted Answer

To determine the data type of a value

Answer

To create a new data type

Answer

To convert a value to a specific data type

Answer

To delete a data type

Question 27

Which statement accurately describes the difference between primitive and abstract data types?

Accepted Answer

Primitive data types are built-in, while abstract data types are user-defined.

Answer

Abstract data types are built-in, while primitive data types are user-defined.

Answer

Abstract data types are a subset of primitive data types.

Answer

Primitive data types cannot be represented in hardware.

Question 28

What is a key advantage of using a linked list data structure?

Accepted Answer

Efficient insertion and deletion of elements

Answer

Efficient memory usage compared to arrays

Answer

Random access to elements

Answer

Fixed size, making memory management easier

Question 29

Which data type is used to represent numbers without decimal points?

Accepted Answer

Integer

Answer

Float

Answer

Boolean

Answer

String

Question 30

Which data type is used to represent numbers with decimal points?

Accepted Answer

Float

Answer

Integer

Answer

String

Answer

Boolean

Question 31

Which data type is used to represent sequences of characters?

Accepted Answer

String

Answer

Float

Answer

Boolean

Answer

Integer

Question 32

Which data type is used to represent true or false values?

Accepted Answer

Boolean

Answer

Float

Answer

Integer

Answer

String

Question 33

Which of the following is a valid integer literal (without decimal point)?

Accepted Answer

123

Answer

123.45

Answer

"hello"

Answer

true

Question 34

Which of the following is a valid float literal (with decimal point)?

Accepted Answer

123.45

Answer

"hello"

Answer

true

Answer

123

Question 35

Which of the following is a valid string literal (sequence of characters)?

Accepted Answer

"hello"

Answer

true

Answer

123.45

Answer

123

Question 36

Which of the following is a valid boolean literal (true or false)?

Accepted Answer

true

Answer

123

Answer

123.45

Answer

"hello"

Question 37

Which of the following is a primitive data type (basic data type)?

Accepted Answer

Integer

Answer

Array

Answer

List

Answer

Object

Question 38

Which data type represents whole numbers, both positive and negative, without a decimal point?

Accepted Answer

Integer

Answer

Boolean

Answer

String

Answer

Float

Question 39

Which data type is suitable for representing decimal numbers?

Accepted Answer

Float

Answer

Integer

Answer

String

Answer

Char

Question 40

Which data type is used to store a sequence of characters in a specific order?

Accepted Answer

String

Answer

Float

Answer

Bool

Answer

Int

Question 41

Which data type represents true or false values?

Accepted Answer

Boolean

Answer

Double

Answer

Character

Answer

String

Question 42

Which of the following operations can be performed on integer data types?

Accepted Answer

Addition, subtraction, multiplication, division, and modulus

Answer

Division by zero

Answer

String concatenation

Question 43

Which of the following is an example of a floating-point number?

Accepted Answer

3.14159

Answer

Hello

Answer

10

Answer

True

Question 44

Which of the following methods can be used to convert a string to an integer?

Accepted Answer

Integer.parseInt(string)

Answer

Float.parseFloat(string)

Answer

Boolean.parseBoolean(string)

Answer

String.parseInteger(string)