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 an example of a regression application?
A.
Predicting customer churn
B.
Estimating the price of a house
C.
Identifying fraudulent transactions
D.
Classifying images of animals
Show solution
Solution
Estimating the price of a house is an example of a regression application, as it involves predicting a continuous value.
Correct Answer:
B
— Estimating the price of a house
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Q. Which of the following is an example of a regression problem?
A.
Classifying emails as spam or not spam
B.
Predicting house prices based on features
C.
Segmenting customers into groups
D.
Identifying objects in images
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Solution
Predicting house prices based on features is a regression problem, as it involves predicting a continuous value.
Correct Answer:
B
— Predicting house prices based on features
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Q. Which of the following is an example of a regression task?
A.
Classifying images of animals
B.
Predicting the temperature for tomorrow
C.
Segmenting customers based on behavior
D.
Identifying fraudulent transactions
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Solution
Predicting the temperature for tomorrow is a regression task as it involves predicting a continuous value.
Correct Answer:
B
— Predicting the temperature for tomorrow
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Q. Which of the following is an example of a syntax error?
A.
Using an undeclared variable
B.
Missing a semicolon
C.
Dividing by zero
D.
Using the wrong data type
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Solution
A syntax error occurs when the code does not conform to the grammatical rules of the programming language, such as missing a semicolon.
Correct Answer:
B
— Missing a semicolon
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Q. Which of the following is an example of cloud storage?
A.
Google Drive
B.
USB Flash Drive
C.
External Hard Drive
D.
CD-ROM
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Solution
Google Drive is an example of cloud storage.
Correct Answer:
A
— Google Drive
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Q. Which of the following is an example of unsupervised feature learning?
A.
Linear Regression
B.
K-Means Clustering
C.
Support Vector Machines
D.
Decision Trees
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Solution
K-Means Clustering is an unsupervised learning technique that identifies patterns in data without labeled outcomes.
Correct Answer:
B
— K-Means Clustering
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Q. Which of the following is an example of unsupervised learning in cloud ML services?
A.
Image classification
B.
Customer segmentation
C.
Spam detection
D.
Sentiment analysis
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Solution
Customer segmentation is an example of unsupervised learning, where the model identifies patterns in data without labeled outcomes.
Correct Answer:
B
— Customer segmentation
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Q. Which of the following is an example of unsupervised learning in feature engineering?
A.
Using labeled data to train a model
B.
Clustering similar data points to identify patterns
C.
Predicting outcomes based on historical data
D.
Using regression analysis to find relationships
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Solution
Clustering similar data points is an example of unsupervised learning, where the model identifies patterns without labeled outcomes.
Correct Answer:
B
— Clustering similar data points to identify patterns
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Q. Which of the following is an example of unsupervised learning?
A.
Image classification
B.
Sentiment analysis
C.
Market basket analysis
D.
Spam detection
Show solution
Solution
Market basket analysis is an example of unsupervised learning, where patterns are discovered without labeled outcomes.
Correct Answer:
C
— Market basket analysis
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Q. Which of the following is NOT a benefit of code optimization?
A.
Improved performance
B.
Reduced memory usage
C.
Increased code complexity
D.
Faster execution time
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Solution
Increased code complexity is NOT a benefit of code optimization; optimizations aim to maintain or reduce complexity.
Correct Answer:
C
— Increased code complexity
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Q. Which of the following is NOT a benefit of effective feature engineering?
A.
Improved model accuracy
B.
Reduced training time
C.
Increased interpretability of the model
D.
Elimination of the need for data preprocessing
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Solution
Effective feature engineering does not eliminate the need for data preprocessing; it often requires it to prepare the data for modeling.
Correct Answer:
D
— Elimination of the need for data preprocessing
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Q. Which of the following is NOT a benefit of feature engineering?
A.
Improved model accuracy
B.
Reduced training time
C.
Enhanced interpretability
D.
Increased data redundancy
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Solution
Increased data redundancy is not a benefit of feature engineering; rather, effective feature engineering aims to reduce redundancy and improve the quality of the features used.
Correct Answer:
D
— Increased data redundancy
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Q. Which of the following is NOT a case study where Dijkstra's algorithm is commonly applied?
A.
GPS navigation systems
B.
Network routing protocols
C.
Social network analysis
D.
Flight scheduling systems
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Solution
Dijkstra's algorithm is not commonly applied in social network analysis, as it is primarily used for shortest path problems in weighted graphs.
Correct Answer:
C
— Social network analysis
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Q. Which of the following is NOT a challenge in model deployment?
A.
Integration with existing systems
B.
Data privacy concerns
C.
Model training time
D.
Monitoring model performance
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Solution
Model training time is not a challenge in deployment; rather, it is a concern during the model development phase.
Correct Answer:
C
— Model training time
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Q. Which of the following is NOT a characteristic of a binary search tree (BST)?
A.
Left subtree contains only nodes with values less than the parent node.
B.
Right subtree contains only nodes with values greater than the parent node.
C.
Both subtrees must be binary trees.
D.
All nodes must have two children.
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Solution
A binary search tree does not require all nodes to have two children; it can have zero, one, or two children.
Correct Answer:
D
— All nodes must have two children.
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Q. Which of the following is NOT a characteristic of a binary search tree?
A.
Left subtree contains only nodes with values less than the root.
B.
Right subtree contains only nodes with values greater than the root.
C.
Both subtrees must be binary search trees.
D.
All nodes must have two children.
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Solution
In a binary search tree, it is not necessary for all nodes to have two children; some nodes can have one or no children.
Correct Answer:
D
— All nodes must have two children.
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Q. Which of the following is NOT a characteristic of a binary tree?
A.
Each node has at most two children
B.
It can be empty
C.
All nodes have the same number of children
D.
It has a root node
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Solution
In a binary tree, not all nodes have to have the same number of children; some can have zero, one, or two children.
Correct Answer:
C
— All nodes have the same number of children
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Q. Which of the following is not a characteristic of a linked list?
A.
Dynamic size
B.
Random access
C.
Efficient insertions/deletions
D.
Non-contiguous memory allocation
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Solution
Linked lists do not support random access; elements must be accessed sequentially.
Correct Answer:
B
— Random access
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Q. Which of the following is NOT a characteristic of a stack?
A.
LIFO order
B.
Dynamic size
C.
Random access
D.
Push and pop operations
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Solution
Stacks operate in a Last In First Out (LIFO) manner and do not allow random access; elements can only be accessed in the order they were added.
Correct Answer:
C
— Random access
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Q. Which of the following is NOT a characteristic of arrays?
A.
Fixed size
B.
Random access
C.
Dynamic resizing
D.
Contiguous memory allocation
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Solution
Arrays have a fixed size and do not support dynamic resizing; this is a characteristic of linked lists.
Correct Answer:
C
— Dynamic resizing
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Q. Which of the following is NOT a characteristic of AVL trees?
A.
They are height-balanced
B.
They can have at most one child
C.
They require rotations to maintain balance
D.
They can be used to implement priority queues
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Solution
AVL trees can have multiple children; they are binary trees, and the characteristic that they can have at most one child is incorrect.
Correct Answer:
B
— They can have at most one child
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Q. Which of the following is NOT a characteristic of BFS?
A.
Uses a queue
B.
Finds the shortest path in unweighted graphs
C.
Can be implemented using recursion
D.
Explores all neighbors before going deeper
Show solution
Solution
BFS is typically implemented using a queue, not recursion, which is a characteristic of DFS.
Correct Answer:
C
— Can be implemented using recursion
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Q. Which of the following is NOT a characteristic of binary search?
A.
It requires a sorted array
B.
It can be implemented recursively
C.
It can be implemented iteratively
D.
It works on unsorted data
Show solution
Solution
Binary search does not work on unsorted data; it requires the data to be sorted.
Correct Answer:
D
— It works on unsorted data
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Q. Which of the following is NOT a characteristic of cloud ML services?
A.
On-demand resource allocation
B.
High upfront costs
C.
Collaboration features
D.
Access to large datasets
Show solution
Solution
High upfront costs are not a characteristic of cloud ML services, which typically operate on a pay-as-you-go model.
Correct Answer:
B
— High upfront costs
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Q. Which of the following is NOT a characteristic of Depth-First Search?
A.
Uses a stack
B.
Can be implemented recursively
C.
Finds the shortest path
D.
Explores as far as possible along each branch
Show solution
Solution
DFS does not guarantee the shortest path; it explores as far as possible along each branch before backtracking.
Correct Answer:
C
— Finds the shortest path
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Q. Which of the following is NOT a characteristic of DFS?
A.
Uses a stack data structure
B.
Can be implemented recursively
C.
Explores all neighbors before going deeper
D.
Can find connected components
Show solution
Solution
DFS explores as far as possible along each branch before backtracking, which means it does not explore all neighbors before going deeper.
Correct Answer:
C
— Explores all neighbors before going deeper
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Q. Which of the following is NOT a characteristic of Dijkstra's algorithm?
A.
It uses a greedy approach
B.
It guarantees the shortest path
C.
It can be used for negative weights
D.
It requires a priority queue
Show solution
Solution
Dijkstra's algorithm cannot be used for graphs with negative weights, which is a key characteristic.
Correct Answer:
C
— It can be used for negative weights
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Q. Which of the following is NOT a characteristic of dynamic programming?
A.
Optimal substructure
B.
Greedy choice property
C.
Overlapping subproblems
D.
Memoization
Show solution
Solution
The greedy choice property is not a characteristic of dynamic programming; it is associated with greedy algorithms, which make local optimal choices.
Correct Answer:
B
— Greedy choice property
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Q. Which of the following is NOT a characteristic of greedy algorithms?
A.
They make decisions based on current information
B.
They do not reconsider previous decisions
C.
They guarantee an optimal solution for all problems
D.
They are often faster than other algorithms
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Solution
Greedy algorithms do not guarantee an optimal solution for all problems; they work well for specific types of problems.
Correct Answer:
C
— They guarantee an optimal solution for all problems
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Q. Which of the following is NOT a characteristic of hierarchical clustering?
A.
Creates a tree-like structure
B.
Can be agglomerative or divisive
C.
Requires the number of clusters to be specified in advance
D.
Can visualize data relationships
Show solution
Solution
Hierarchical clustering does not require the number of clusters to be specified in advance; it builds a hierarchy of clusters.
Correct Answer:
C
— Requires the number of clusters to be specified in advance
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