Computer Science & IT

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Computer Science & IT MCQ & Objective Questions

Computer Science & IT is a crucial subject for students preparing for school and competitive exams in India. Mastering this field not only enhances your understanding of technology but also significantly boosts your exam scores. Practicing MCQs and objective questions is an effective way to reinforce your knowledge and identify important questions that frequently appear in exams.

What You Will Practise Here

  • Fundamentals of Computer Science
  • Data Structures and Algorithms
  • Operating Systems Concepts
  • Networking Basics and Protocols
  • Database Management Systems
  • Software Engineering Principles
  • Programming Languages Overview

Exam Relevance

Computer Science & IT is an integral part of the curriculum for CBSE, State Boards, and competitive exams like NEET and JEE. Questions often focus on theoretical concepts, practical applications, and problem-solving skills. Common patterns include multiple-choice questions that test your understanding of key concepts, definitions, and the ability to apply knowledge in various scenarios.

Common Mistakes Students Make

  • Confusing similar concepts in data structures, such as arrays and linked lists.
  • Overlooking the importance of algorithms and their time complexities.
  • Misunderstanding the functions and roles of different operating system components.
  • Neglecting to practice coding problems, leading to difficulty in programming questions.
  • Failing to grasp the fundamentals of networking, which can lead to errors in related MCQs.

FAQs

Question: What are the best ways to prepare for Computer Science & IT exams?
Answer: Regular practice of MCQs, understanding key concepts, and reviewing past exam papers are effective strategies.

Question: How can I improve my problem-solving skills in Computer Science?
Answer: Engage in coding exercises, participate in study groups, and tackle a variety of practice questions.

Start your journey towards mastering Computer Science & IT today! Solve our practice MCQs to test your understanding and enhance your exam preparation. Remember, consistent practice is the key to success!

Q. Which of the following is NOT a valid binary tree traversal method?
  • A. In-order
  • B. Pre-order
  • C. Post-order
  • D. Side-order
Q. Which of the following is NOT a valid Class A IP address?
  • A. 10.0.0.1
  • B. 127.0.0.1
  • C. 192.168.1.1
  • D. 100.100.100.100
Q. Which of the following is NOT a valid HTTP status code?
  • A. 200
  • B. 301
  • C. 404
  • D. 5050
Q. Which of the following is NOT a valid implementation of Dijkstra's algorithm?
  • A. Using an adjacency matrix.
  • B. Using an adjacency list with a binary heap.
  • C. Using a linked list for the priority queue.
  • D. Using a Fibonacci heap.
Q. Which of the following is NOT a valid IPv4 address?
  • A. 192.168.1.1
  • B. 256.100.50.25
  • C. 10.0.0.1
  • D. 172.16.0.5
Q. Which of the following is not a valid pointer declaration in C?
  • A. int *ptr;
  • B. float ptr;
  • C. char *ptr;
  • D. double *ptr;
Q. Which of the following is NOT a valid subnet mask?
  • A. 255.255.255.0
  • B. 255.255.255.128
  • C. 255.255.255.256
  • D. 255.255.255.192
Q. Which of the following is NOT a valid tree traversal method?
  • A. In-order
  • B. Pre-order
  • C. Post-order
  • D. Side-order
Q. Which of the following is NOT a valid way to implement a binary tree in C++?
  • A. Using a struct with pointers
  • B. Using an array
  • C. Using a linked list
  • D. Using a vector
Q. Which of the following is NOT a valid way to implement a binary tree in Python?
  • A. Using a class for nodes
  • B. Using a list to store values
  • C. Using a dictionary to map parent-child relationships
  • D. Using a set to store unique values
Q. Which of the following is NOT an application of DFS?
  • A. Topological sorting
  • B. Finding strongly connected components
  • C. Finding the shortest path
  • D. Solving puzzles like mazes
Q. Which of the following is NOT an application of Dijkstra's algorithm?
  • A. GPS navigation systems
  • B. Network routing protocols
  • C. Finding the minimum spanning tree
  • D. Robot path planning
Q. Which of the following is the correct subnet mask for a network that has 14 usable IP addresses?
  • A. 255.255.255.240
  • B. 255.255.255.224
  • C. 255.255.255.252
  • D. 255.255.255.248
Q. Which of the following is true about a binary search tree (BST)?
  • A. Inorder traversal gives sorted order
  • B. Preorder traversal gives sorted order
  • C. Postorder traversal gives sorted order
  • D. Level order traversal gives sorted order
Q. Which of the following is true about a binary search tree?
  • A. All nodes have at most two children.
  • B. The left child is always greater than the parent.
  • C. The right child is always less than the parent.
  • D. The left child is always less than the parent.
Q. Which of the following is true about a circular linked list?
  • A. It has a null reference
  • B. It can be traversed in one direction only
  • C. It can be traversed in both directions
  • D. The last node points to the first node
Q. Which of the following is true about a complete binary tree?
  • A. All levels are fully filled except possibly the last level.
  • B. All nodes have two children.
  • C. It is always balanced.
  • D. It has a maximum height of log n.
Q. Which of the following is true about a doubly linked list?
  • A. Each node has one pointer
  • B. Nodes can be traversed in both directions
  • C. It uses less memory than a singly linked list
  • D. It is always sorted
Q. Which of the following is true about a queue?
  • A. LIFO structure
  • B. FIFO structure
  • C. Random access
  • D. None of the above
Q. Which of the following is true about a stack?
  • A. Elements can be accessed in any order
  • B. Elements are removed in FIFO order
  • C. Elements are removed in LIFO order
  • D. None of the above
Q. Which of the following is true about arrays?
  • A. They can grow dynamically
  • B. They allow random access
  • C. They are always faster than linked lists
  • D. They require more memory than linked lists
Q. Which of the following is true about AVL trees compared to Red-Black trees?
  • A. AVL trees are faster for lookup operations.
  • B. Red-Black trees are faster for lookup operations.
  • C. Both have the same performance.
  • D. AVL trees are easier to implement.
Q. Which of the following is true about BFS?
  • A. It uses a stack
  • B. It finds the shortest path in unweighted graphs
  • C. It is faster than DFS
  • D. It cannot be implemented recursively
Q. Which of the following is true about DFS?
  • A. It can be implemented using recursion
  • B. It always finds the shortest path
  • C. It uses a queue
  • D. It is not suitable for cyclic graphs
Q. Which of the following is true about linked lists compared to arrays?
  • A. Linked lists have a fixed size
  • B. Arrays allow dynamic resizing
  • C. Linked lists allow efficient insertions/deletions
  • D. Arrays are more memory efficient
Q. Which of the following is true about pointers?
  • A. Pointers can only point to integers
  • B. Pointers can point to any data type
  • C. Pointers cannot be reassigned
  • D. Pointers are always initialized to zero
Q. Which of the following is true about Quick Sort?
  • A. It is always faster than Merge Sort
  • B. It is not in-place
  • C. It can be implemented using recursion
  • D. It is stable
Q. Which of the following is true about recursive algorithms?
  • A. They always run faster than iterative algorithms
  • B. They can be less memory efficient due to call stack
  • C. They cannot be used for sorting
  • D. They are always easier to understand
Q. Which of the following is true about Red-Black Trees?
  • A. They are always perfectly balanced
  • B. They can have a maximum height of 2 log n
  • C. They guarantee O(log n) time for all operations
  • D. They require more memory than AVL trees
Q. Which of the following is true about SLR parsing?
  • A. It uses a single lookahead token.
  • B. It is a type of LL parsing.
  • C. It can handle all context-free grammars.
  • D. It is less powerful than canonical LR parsing.
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