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. How does a Random Forest handle missing values?
  • A. It cannot handle missing values.
  • B. It uses mean imputation.
  • C. It uses a surrogate split.
  • D. It drops the entire dataset.
Q. How does a Random Forest improve upon a single Decision Tree?
  • A. By using a single model for predictions
  • B. By averaging the predictions of multiple trees
  • C. By increasing the depth of each tree
  • D. By using only the most important features
Q. How does a Red-Black tree ensure balance after deletion?
  • A. By performing rotations and recoloring.
  • B. By deleting the node and not balancing.
  • C. By merging nodes.
  • D. By increasing the height of the tree.
Q. How does a Red-Black Tree ensure balance after insertion?
  • A. By performing rotations and recoloring
  • B. By deleting the deepest node
  • C. By merging nodes
  • D. By increasing the height of the tree
Q. How does an AVL tree maintain balance after an insertion?
  • A. By performing rotations.
  • B. By deleting nodes.
  • C. By increasing the height of the tree.
  • D. By changing node colors.
Q. How does an AVL tree maintain balance after insertion?
  • A. By performing rotations.
  • B. By deleting nodes.
  • C. By increasing the height.
  • D. By changing colors.
Q. How does binary search determine the middle element of the array?
  • A. Using the first and last index
  • B. Using the average of all elements
  • C. Using the median value
  • D. Using a random index
Q. How does binary search determine the middle index of an array?
  • A. (low + high) / 2
  • B. low + high
  • C. low * high
  • D. high - low
Q. How does binary search determine the next interval to search?
  • A. By comparing the target with the middle element
  • B. By checking the first and last elements
  • C. By using a hash table
  • D. By traversing the entire array
Q. How does binary search determine which half of the array to search next?
  • A. By comparing the middle element with the target
  • B. By checking the length of the array
  • C. By using a random index
  • D. By iterating through the array
Q. How does Dijkstra's algorithm ensure that it finds the shortest path?
  • A. By exploring all possible paths
  • B. By using a depth-first search
  • C. By always choosing the nearest unvisited vertex
  • D. By backtracking to previous nodes
Q. How does Dijkstra's algorithm ensure that the shortest path is found?
  • A. By exploring all possible paths
  • B. By using a greedy approach
  • C. By backtracking
  • D. By using dynamic programming
Q. How does Dijkstra's algorithm handle nodes that have already been visited?
  • A. It ignores them
  • B. It re-evaluates their distances
  • C. It adds them to a stack
  • D. It removes them from the graph
Q. How does Dijkstra's algorithm update the tentative distances of neighboring nodes?
  • A. By adding the edge weights to the current node's distance
  • B. By multiplying the edge weights with the current node's distance
  • C. By subtracting the edge weights from the current node's distance
  • D. By ignoring the edge weights
Q. How does Dijkstra's algorithm update the tentative distances?
  • A. By adding the edge weights to the current distances
  • B. By multiplying the edge weights with the current distances
  • C. By subtracting the edge weights from the current distances
  • D. By averaging the edge weights
Q. How does Random Forest handle missing values in the dataset?
  • A. It ignores missing values completely
  • B. It uses mean imputation for missing values
  • C. It can use surrogate splits to handle missing values
  • D. It requires complete data without any missing values
Q. How does Random Forest handle missing values?
  • A. It cannot handle missing values
  • B. It ignores missing values completely
  • C. It uses imputation techniques
  • D. It can use surrogate splits
Q. How does Random Forest improve upon a single Decision Tree?
  • A. By using a single tree with more depth.
  • B. By averaging the predictions of multiple trees.
  • C. By using only the most important features.
  • D. By increasing the size of the training dataset.
Q. How does Random Forest reduce the risk of overfitting compared to a single Decision Tree?
  • A. By using a single tree with more depth
  • B. By averaging the predictions of multiple trees
  • C. By using only the most important features
  • D. By increasing the size of the training dataset
Q. How does SVM handle multi-class classification problems?
  • A. By using a single model for all classes
  • B. By applying one-vs-one or one-vs-all strategies
  • C. By ignoring the additional classes
  • D. By converting them into binary problems only
Q. How does SVM handle outliers in the training data?
  • A. By ignoring them completely
  • B. By assigning them a higher weight
  • C. By using a soft margin approach
  • D. By clustering them separately
Q. How does the balancing factor of an AVL tree node get calculated?
  • A. Height of left subtree - height of right subtree
  • B. Height of right subtree - height of left subtree
  • C. Number of nodes in left subtree - number of nodes in right subtree
  • D. Number of nodes in right subtree - number of nodes in left subtree
Q. How does the balancing of an AVL tree differ from that of a Red-Black tree?
  • A. AVL trees are more rigidly balanced than Red-Black trees
  • B. Red-Black trees are always perfectly balanced
  • C. AVL trees allow more flexibility in balancing
  • D. There is no difference
Q. How does the choice of the kernel affect the performance of a Support Vector Machine?
  • A. It does not affect performance
  • B. It determines the complexity of the model
  • C. It only affects training time
  • D. It is irrelevant to the model's accuracy
Q. How does the height of an AVL tree compare to that of a Red-Black tree?
  • A. AVL trees are always shorter.
  • B. Red-Black trees are always shorter.
  • C. They have the same height.
  • D. AVL trees are shorter in the worst case.
Q. How does the insertion operation in a Red-Black Tree differ from that in an AVL Tree?
  • A. Red-Black Trees require fewer rotations
  • B. AVL Trees allow duplicate values
  • C. Red-Black Trees are always balanced
  • D. AVL Trees are faster for insertion
Q. How does the insertion operation in an AVL tree differ from that in a Red-Black tree?
  • A. AVL trees require more rotations
  • B. Red-Black trees require more rotations
  • C. Both require the same number of rotations
  • D. Insertion is the same in both
Q. How does the presence of duplicate elements affect the binary search algorithm?
  • A. It has no effect
  • B. It slows down the search
  • C. It can return any index of the duplicates
  • D. It makes the search impossible
Q. How does the time complexity of searching in a Red-Black Tree compare to that in an AVL Tree?
  • A. Red-Black Tree is faster
  • B. AVL Tree is faster
  • C. Both have the same time complexity
  • D. It depends on the implementation
Q. How does the time complexity of searching in a Red-Black Tree compare to that of an AVL Tree?
  • A. Red-Black is faster
  • B. AVL is faster
  • C. Both have the same complexity
  • D. Red-Black is slower
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