Data Structures for Year 11 Computing: Interactive Quizzes and Practice

Question 1

Which of the following is NOT considered a basic data structure taught in secondary school computing?

Accepted Answer

Graph

Answer

Array

Answer

Tree

Answer

Stack

Question 2

Which data structure is typically used to represent a collection of elements in a specific order, allowing efficient insertion and deletion operations at any position?

Accepted Answer

Linked List

Answer

Array

Answer

Tree

Answer

Graph

Question 3

When inserting a new element at the beginning of a linked list, what is the time complexity of this operation?

Accepted Answer

O(1)

Answer

O(n)

Answer

O(log n)

Answer

O(n^2)

Question 4

Which of the following data structures exhibits a hierarchical organization and can be traversed recursively?

Accepted Answer

Tree

Answer

Array

Answer

Stack

Answer

Queue

Question 5

In an array of size 'n', what is the maximum number of elements that can be stored within it?

Accepted Answer

n

Answer

n-1

Answer

n+1

Answer

2n

Question 6

What is the key difference between a singly linked list and a doubly linked list in terms of node structure?

Accepted Answer

Singly linked list nodes have one pointer, while doubly linked list nodes have two pointers.

Answer

Doubly linked list nodes have one pointer, while singly linked list nodes have two pointers.

Answer

They both have the same node structure.

Answer

They are both implemented using recursion.

Question 7

In a linked list, what is the primary purpose of a tail pointer?

Accepted Answer

To point to the last node in the list

Answer

To point to the first node in the list

Answer

To point to the previous node in the list

Answer

To point to the next node in the list

Question 8

Which data structure stores elements sequentially, allowing efficient access using an index?

Accepted Answer

Array

Answer

List

Answer

Stack

Answer

Queue

Question 9

Given the array [1, 3, 5, 7], what is the result of the following code snippet: `arr[1] + arr[2]`?

Accepted Answer

10

Answer

8

Answer

12

Answer

14

Question 10

Which operation is NOT commonly performed on a stack?

Accepted Answer

Sort

Answer

Push

Answer

Pop

Answer

Peek

Question 11

The following Python code creates a list: `my_list = [1, ‘a’, True]`. Which characteristic does this list NOT possess?

Accepted Answer

Has a fixed size that cannot be changed

Answer

Can store elements of different data types

Answer

Can be modified after creation

Answer

Can contain duplicate elements

Question 12

What operation in a list inserts an element at a specified position?

Accepted Answer

Insert

Answer

Append

Answer

Add

Answer

Update

Question 13

What is the time complexity of searching for an element in an array of size n?

Accepted Answer

O(n)

Answer

O(1)

Answer

O(log n)

Answer

O(n^2)

Question 14

Which of the following is a recursive data structure?

Accepted Answer

Tree

Answer

Linked list

Answer

Queue

Answer

Stack

Question 15

What is the primary purpose of a sentinel node in a linked list?

Accepted Answer

To indicate the end of the list, simplifying traversal and operations

Answer

To improve search performance by providing a starting point for the search

Answer

To prevent memory leaks by ensuring proper deallocation of memory

Answer

To store additional data associated with the linked list

Question 16

Which data structure follows the Last In First Out (LIFO) principle, where the last element added is the first to be removed?

Accepted Answer

Stack

Answer

Queue

Answer

List

Answer

Array

Question 17

Which of the following is not considered a fundamental data structure?

Accepted Answer

Database

Answer

Array

Answer

List

Answer

Tree

Question 18

Which data structure is optimal for storing a sequence of items accessible in any order?

Accepted Answer

List

Answer

Array

Answer

Stack

Answer

Queue

Question 19

What is the time complexity of accessing an element in an array based on its index?

Accepted Answer

O(1)

Answer

O(log n)

Answer

O(n)

Answer

O(n^2)

Question 20

Which property is characteristic of a stack data structure?

Accepted Answer

Last In First Out (LIFO)

Answer

First In Last Out (FILO)

Answer

First In First Out (FIFO)

Answer

Random In Random Out (RIRO)

Question 21

How do arrays differ from linked lists in their data storage approach?

Accepted Answer

Arrays store data contiguously, while linked lists store data in separate nodes.

Answer

Linked lists store data contiguously, while arrays store data in separate nodes.

Answer

Arrays and linked lists store data in the same way.

Answer

Arrays are more efficient than linked lists for all operations.

Question 22

What is the primary purpose of a sentinel node in a linked list?

Accepted Answer

To indicate the end of the list

Answer

To enhance search efficiency

Answer

To store additional data about the list

Answer

To prevent memory leaks

Question 23

What is the fundamental difference between a static and a dynamic array?

Accepted Answer

Static arrays have a fixed size, while dynamic arrays can adjust their size dynamically.

Answer

Dynamic arrays have a fixed size, while static arrays can adjust their size dynamically.

Answer

Static and dynamic arrays store data in the same way.

Answer

There is no distinction between static and dynamic arrays.

Question 24

How does selecting an appropriate data structure affect an algorithm's efficiency?

Accepted Answer

Significant impact

Answer

No impact

Answer

Minimal impact

Question 25

Which operation on a list boasts the highest level of efficiency?

Accepted Answer

Adding an element at its end

Answer

Adding an element at its beginning

Answer

Retrieving an element's value

Answer

Removing an element

Question 26

Which data structure adheres to the Last-In-First-Out (LIFO) principle?

Accepted Answer

Stack

Answer

Array

Answer

List

Answer

Queue

Question 27

What advantage does a linked list possess compared to other data structures?

Accepted Answer

Efficient element insertion and deletion

Answer

Dynamic memory allocation

Answer

Swift access to any element

Answer

Reduced memory footprint

Question 28

What primary purpose does a pointer serve within a data structure?

Accepted Answer

To establish a reference to another element within the structure

Answer

To assign a value to an element

Answer

To search for a specific element within the structure

Answer

To create a new element within the structure

Question 29

Which type of data structure is NOT considered basic?

Accepted Answer

Function

Answer

Array

Answer

List

Answer

Stack

Question 30

Primary purpose of an array data structure?

Accepted Answer

Store a collection of elements with the same data type

Answer

Store a collection of elements with different data types

Answer

Perform complex mathematical operations

Answer

Manage memory allocation in a program

Question 31

Maximum number of child nodes that a node in a binary tree can have

Accepted Answer

2

Answer

1

Answer

3

Answer

Unlimited

Question 32

Type of binary tree traversal that visits nodes in the order: root, left subtree, right subtree

Accepted Answer

Pre-order

Answer

In-order

Answer

Post-order

Answer

Level-order

Question 33

Time complexity of searching for an element in a balanced binary search tree

Accepted Answer

Logarithmic (O(log n))

Answer

Constant (O(1))

Answer

Linear (O(n))

Answer

Quadratic (O(n^2))

Question 34

When adding new elements to a dataset, how can using a linked list be faster than an array?

Accepted Answer

Linked lists allow quicker insertion of new elements.

Answer

Arrays manage memory better than linked lists.

Answer

Linked lists are only for small datasets.

Answer

Arrays are more efficient for searching than linked lists.

Question 35

In which real-world situation would a queue data structure be most useful?

Accepted Answer

A line of people waiting to be served at a store

Answer

A database of customer records

Answer

A family tree

Answer

A stack of books

Question 36

Which data structure would be the most appropriate choice for representing a network of connections, such as a social network or a road network? Explain how this data structure can be utilized for this purpose.

Accepted Answer

Graph

Answer

Array

Answer

List

Answer

Hash Table

Question 37

When implementing a waiting line, which advantage does a queue provide over a stack?

Accepted Answer

FIFO (First-In-First-Out) order

Answer

Faster addition of new elements

Answer

Lower memory usage

Question 38

Which of the following is not a data structure?

Accepted Answer

Variable

Answer

Stack

Answer

Array

Answer

List

Question 39

Which data structure stores data in a first-in, first-out (FIFO) manner?

Accepted Answer

Queue

Answer

List

Answer

Array

Answer

Stack

Question 40

Which of the following is an advantage of using arrays?

Accepted Answer

Efficient random access

Answer

Efficient insertion and deletion

Answer

Dynamic size adjustment

Answer

FIFO order

Question 41

Which data structure is commonly used for representing hierarchical relationships?

Accepted Answer

Tree

Answer

Stack

Answer

Array

Answer

Queue

Question 42

Which of the following operations can be efficiently performed using a stack?

Accepted Answer

Push and pop

Answer

Sort

Answer

Insert at specific index

Answer

Search

Question 43

Which data structure would be most suitable for storing a list of student names?

Accepted Answer

Array

Answer

Tree

Answer

Stack

Answer

Queue

Question 44

Which of the following is a limitation of linked lists?

Accepted Answer

Can be slower than arrays for random access

Answer

Dynamic size adjustment

Answer

Efficient insertion and deletion

Answer

FIFO order

Question 45

Which data structure can be used to implement a depth-first search algorithm?

Accepted Answer

Stack

Answer

Array

Answer

Queue

Answer

Tree

Question 46

Which data structure is commonly used to represent a graph?

Accepted Answer

Adjacency list

Answer

Stack

Answer

Queue

Answer

Array

Question 47

Which of these is NOT a basic data structure used in programming?

Accepted Answer

Database

Answer

Array

Answer

List

Answer

Stack

Question 48

How are elements stored in an array?

Accepted Answer

Consecutively in memory

Answer

Randomly in memory

Answer

On external storage devices

Answer

In multiple locations in memory

Question 49

What are the main operations performed on a stack?

Accepted Answer

Push and pop

Answer

Insert and delete

Answer

Append and prepend

Answer

Add and remove

Question 50

Which data structure is best for managing a queue of customers waiting to be served?

Accepted Answer

Queue

Answer

Array

Answer

Stack

Answer

List

Question 51

Which data structure is often used to implement the 'undo' functionality in word processors?

Accepted Answer

Stack

Answer

Queue

Answer

List

Answer

Array