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Objective Questions

Latest Indian Army Education Havildar IT Exam Question (Objective Questions), MCQ in English

Subjects : IT/ Cyber Concepts, Electronics, Chemistry, Physics, Mathematics

Question Bank Indian Army Education Havildar (IT/Cyber) Paper 2 Exam - English
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IT/ Cyber Concepts

Question 1Single Answer
Which data structure stores elements in contiguous memory locations?
  1. A
    Linked List
  2. B
    Stack
  3. C
    Array
  4. D
    Queue
Question 2Single Answer
What is the time complexity of accessing an element in an array by its index?
  1. A
    O(n)
  2. B
    O(log n)
  3. C
    O(1)
  4. D
    O(n log n)
Question 3Single Answer
Which data structure follows the Last-In, First-Out (LIFO) principle?
  1. A
    Queue
  2. B
    Linked List
  3. C
    Stack
  4. D
    Tree
Question 4Single Answer
What are the two main operations performed on a stack?
  1. A
    Insert and Delete
  2. B
    Push and Pop
  3. C
    Add and Remove
  4. D
    Get and Set
Question 5Single Answer
Which data structure follows the First-In, First-Out (FIFO) principle?
  1. A
    Stack
  2. B
    Linked List
  3. C
    Queue
  4. D
    Tree
Question 6Single Answer
In a queue, where are elements typically added?
  1. A
    At the front
  2. B
    At the middle
  3. C
    At the rear
  4. D
    Anywhere
Question 7Single Answer
Which data structure consists of nodes where each node contains data and a pointer to the next node?
  1. A
    Array
  2. B
    Stack
  3. C
    Linked List
  4. D
    Queue
Question 8Single Answer
What is the advantage of using a linked list over an array?
  1. A
    Faster access to elements.
  2. B
    Fixed size.
  3. C
    Dynamic size and easier insertion/deletion.
  4. D
    More memory efficient.
Question 9Single Answer
A data structure that has a hierarchical structure is called a:
  1. A
    Linked List
  2. B
    Queue
  3. C
    Tree
  4. D
    Stack
Question 10Single Answer
In a binary tree, each node can have at most how many children?
  1. A
    0
  2. B
    1
  3. C
    2
  4. D
    3
Question 11Single Answer
A data structure that consists of a collection of nodes where nodes can have multiple neighbors is called a:
  1. A
    Tree
  2. B
    Stack
  3. C
    Graph
  4. D
    Queue
Question 12Single Answer
What is the process of arranging elements in a specific order called?
  1. A
    Searching
  2. B
    Inserting
  3. C
    Sorting
  4. D
    Deleting
Question 13Single Answer
Which sorting algorithm has an average time complexity of O(n log n)?
  1. A
    Bubble Sort
  2. B
    Insertion Sort
  3. C
    Quick Sort
  4. D
    Selection Sort
Question 14Single Answer
What is the basic idea behind Quick Sort?
  1. A
    Repeatedly swapping adjacent elements.
  2. B
    Inserting elements into their correct position one by one.
  3. C
    Picking an element as a pivot and partitioning the array around it.
  4. D
    Finding the smallest element and placing it at the beginning.
Question 15Single Answer
Which sorting algorithm has a worst-case time complexity of O(n2)?
  1. A
    Merge Sort
  2. B
    Quick Sort
  3. C
    Heap Sort
  4. D
    Bubble Sort
Question 16Single Answer
Binary search can only be performed on:
  1. A
    Unsorted arrays.
  2. B
    Linked lists.
  3. C
    Sorted arrays.
  4. D
    Stacks.
Question 17Single Answer
Which data structure is used to implement recursion?
  1. A
    Queue
  2. B
    Array
  3. C
    Stack
  4. D
    Linked List
Question 18Single Answer
In a linked list, the last node typically points to:
  1. A
    The first node.
  2. B
    NULL (or a special value indicating the end).
  3. C
    The middle node.
  4. D
    A random node.
Question 19Single Answer
Which data structure is used in Breadth-First Search (BFS) algorithm?
  1. A
    Stack
  2. B
    Array
  3. C
    Queue
  4. D
    Tree
Question 20Single Answer
Which data structure is used in Depth-First Search (DFS) algorithm?
  1. A
    Queue
  2. B
    Array
  3. C
    Stack
  4. D
    Linked List
Question 21Single Answer
The process of removing an element from a stack is called:
  1. A
    Push
  2. B
    Enqueue
  3. C
    Pop
  4. D
    Insert
Question 22Single Answer
The process of adding an element to a queue is called:
  1. A
    Push
  2. B
    Enqueue
  3. C
    Pop
  4. D
    Dequeue
Question 23Single Answer
What is the time complexity of the linear search algorithm in the worst case?
  1. A
    O(1)
  2. B
    O(log n)
  3. C
    O(n)
  4. D
    O(n log n)
Question 24Single Answer
Which sorting algorithm is known for its stability?
  1. A
    Quick Sort
  2. B
    Bubble Sort
  3. C
    Selection Sort
  4. D
    Heap Sort
Question 25Single Answer
In a binary search tree, the left child of a node has a value:
  1. A
    Greater than the parent.
  2. B
    Equal to the parent.
  3. C
    Less than the parent.
  4. D
    Any value.
Question 26Single Answer
In a binary search tree, the right child of a node has a value:
  1. A
    Less than the parent.
  2. B
    Equal to the parent.
  3. C
    Greater than the parent.
  4. D
    Any value.
Question 27Single Answer
Which data structure is most suitable for implementing a priority queue?
  1. A
    Array
  2. B
    Stack
  3. C
    Heap
  4. D
    Linked List
Question 28Single Answer
The process of removing an element from a queue is called:
  1. A
    Push
  2. B
    Enqueue
  3. C
    Pop
  4. D
    Dequeue
Question 29Single Answer
Which data structure allows for efficient insertion and deletion at any position?
  1. A
    Array
  2. B
    Stack
  3. C
    Singly Linked List
  4. D
    Doubly Linked List
Question 30Single Answer
Merge Sort works based on the principle of:
  1. A
    Partitioning.
  2. B
    Divide and Conquer.
  3. C
    Swapping adjacent elements.
  4. D
    Inserting elements in order.
Question 31Single Answer
Which data structure is used to implement the undo/redo functionality in many applications?
  1. A
    Queue
  2. B
    Array
  3. C
    Stack
  4. D
    Hash Table
Question 32Single Answer
In a graph, edges can have:
  1. A
    Only one direction.
  2. B
    Only a weight.
  3. C
    Direction and/or weight.
  4. D
    Only a color.
Question 33Single Answer
A tree with no nodes is called a:
  1. A
    Rooted tree
  2. B
    Binary tree
  3. C
    Empty tree
  4. D
    Forest
Question 34Single Answer
What is the time complexity of deleting a specific element from an unsorted array?
  1. A
    O(1)
  2. B
    O(log n)
  3. C
    O(n)
  4. D
    O(n log n)
Question 35Single Answer
Which data structure is used to store key-value pairs?
  1. A
    Stack
  2. B
    Queue
  3. C
    Hash Table
  4. D
    Tree
Question 36Single Answer
The process of traversing a tree and visiting each node exactly once is called:
  1. A
    Sorting
  2. B
    Searching
  3. C
    Traversal
  4. D
    Insertion
Question 37Single Answer
Which of the following is an example of a non-linear data structure?
  1. A
    Array
  2. B
    Linked List
  3. C
    Stack
  4. D
    Tree
Question 38Single Answer
The head of a linked list refers to:
  1. A
    The last node.
  2. B
    A node in the middle.
  3. C
    The first node.
  4. D
    A special node that doesn't contain data.
Question 39Single Answer
What is the time complexity of finding the minimum element in an unsorted array?
  1. A
    O(1)
  2. B
    O(log n)
  3. C
    O(n)
  4. D
    O(n log n)
Question 40Single Answer
Which sorting algorithm has a time complexity that is generally better for nearly sorted data?
  1. A
    Quick Sort
  2. B
    Merge Sort
  3. C
    Insertion Sort
  4. D
    Heap Sort
Question 41Single Answer
In a circular linked list, the last node points to:
  1. A
    NULL.
  2. B
    The head of the list.
  3. C
    A random node.
  4. D
    It has no next pointer.
Question 42Single Answer
What is the space complexity of a stack of size n?
  1. A
    O(1)
  2. B
    O(log n)
  3. C
    O(n)
  4. D
    O(n log n)
Question 43Single Answer
Which of the following is a disadvantage of using arrays?
  1. A
    Easy to access elements.
  2. B
    Fixed size.
  3. C
    Efficient for searching.
  4. D
    Contiguous memory allocation.
Question 44Single Answer
What is the fundamental building block of an object-oriented program that defines the properties and behaviors of an object?
  1. A
    Object
  2. B
    Method
  3. C
    Class
  4. D
    Variable
Question 45Single Answer
An instance of a class is called an:
  1. A
    Method
  2. B
    Inheritance
  3. C
    Object
  4. D
    Attribute
Question 46Single Answer
Which of the following concepts allows a class to inherit properties and behaviors from another class?
  1. A
    Polymorphism
  2. B
    Encapsulation
  3. C
    Inheritance
  4. D
    Abstraction
Question 47Single Answer
The ability of an object to take on many forms is known as:
  1. A
    Encapsulation
  2. B
    Inheritance
  3. C
    Abstraction
  4. D
    Polymorphism
Question 48Single Answer
Bundling data and the methods that operate on that data within a single unit is called:
  1. A
    Inheritance
  2. B
    Polymorphism
  3. C
    Encapsulation
  4. D
    Abstraction
Question 49Single Answer
Which OOP concept focuses on hiding the internal implementation details and showing only the necessary information to the user?
  1. A
    Inheritance
  2. B
    Polymorphism
  3. C
    Encapsulation
  4. D
    Abstraction
Question 50Single Answer
A blueprint for creating objects is a:
  1. A
    Object
  2. B
    Method
  3. C
    Class
  4. D
    Attribute
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