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 algorithm is typically used for topological sorting of a directed acyclic graph?
A.
BFS
B.
DFS
C.
Dijkstra's algorithm
D.
Prim's algorithm
Show solution
Solution
DFS is typically used for topological sorting of a directed acyclic graph (DAG) because it can explore all paths and backtrack effectively.
Correct Answer:
B
— DFS
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Q. Which algorithm is typically used for topological sorting?
A.
BFS
B.
DFS
C.
Both
D.
None
Show solution
Solution
DFS is typically used for topological sorting in directed acyclic graphs (DAGs) because it can explore all paths and backtrack effectively.
Correct Answer:
B
— DFS
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Q. Which algorithm is typically used to find the shortest path in a weighted graph?
A.
BFS
B.
DFS
C.
Dijkstra's Algorithm
D.
Prim's Algorithm
Show solution
Solution
Dijkstra's Algorithm is used to find the shortest path in a weighted graph.
Correct Answer:
C
— Dijkstra's Algorithm
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Q. Which algorithm is used for finding the shortest path in a weighted graph?
A.
Depth First Search
B.
Breadth First Search
C.
Dijkstra's Algorithm
D.
Merge Sort
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Solution
Dijkstra's Algorithm is specifically designed to find the shortest path in a weighted graph.
Correct Answer:
C
— Dijkstra's Algorithm
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Q. Which algorithm is used to detect a cycle in a linked list?
A.
Depth First Search
B.
Breadth First Search
C.
Floyd's Cycle Detection
D.
Dijkstra's Algorithm
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Solution
Floyd's Cycle Detection algorithm, also known as the tortoise and hare algorithm, is used to detect cycles in a linked list.
Correct Answer:
C
— Floyd's Cycle Detection
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Q. Which algorithm is used to find the height of a binary tree?
A.
Depth-first search
B.
Breadth-first search
C.
Dynamic programming
D.
Greedy algorithm
Show solution
Solution
Depth-first search (DFS) is commonly used to calculate the height of a binary tree by recursively exploring each branch.
Correct Answer:
A
— Depth-first search
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Q. Which algorithm is used to find the shortest path in a weighted graph?
A.
Depth First Search
B.
Breadth First Search
C.
Dijkstra's Algorithm
D.
Merge Sort
Show solution
Solution
Dijkstra's Algorithm is commonly used to find the shortest path in a weighted graph.
Correct Answer:
C
— Dijkstra's Algorithm
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Q. Which algorithm uses dynamic programming to solve the longest common subsequence problem?
A.
Dijkstra's Algorithm
B.
Floyd-Warshall Algorithm
C.
LCS Algorithm
D.
Merge Sort
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Solution
The Longest Common Subsequence (LCS) problem is solved using a dynamic programming approach.
Correct Answer:
C
— LCS Algorithm
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Q. Which algorithm would you use to find the shortest path in a weighted graph?
A.
BFS
B.
DFS
C.
Dijkstra's Algorithm
D.
Prim's Algorithm
Show solution
Solution
Dijkstra's Algorithm is used to find the shortest path in a weighted graph, while BFS is used for unweighted graphs.
Correct Answer:
C
— Dijkstra's Algorithm
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Q. Which algorithm would you use to find the shortest path in an unweighted graph?
A.
Dijkstra's Algorithm
B.
Depth-First Search
C.
Breadth-First Search
D.
A* Search
Show solution
Solution
Breadth-First Search (BFS) is used to find the shortest path in an unweighted graph.
Correct Answer:
C
— Breadth-First Search
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Q. Which application is NOT typically associated with Random Forests?
A.
Credit scoring
B.
Spam detection
C.
Image classification
D.
Linear regression
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Solution
Random Forests are primarily used for classification and regression tasks, not linear regression.
Correct Answer:
D
— Linear regression
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Q. Which application of neural networks involves generating new content?
A.
Image recognition
B.
Generative art
C.
Data clustering
D.
Anomaly detection
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Solution
Generative art is an application where neural networks can create new images or designs based on learned patterns.
Correct Answer:
B
— Generative art
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Q. Which application of neural networks is used for fraud detection?
A.
Customer segmentation
B.
Anomaly detection
C.
Market analysis
D.
Product recommendation
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Solution
Neural networks are effective in anomaly detection, helping to identify unusual patterns that may indicate fraudulent activity.
Correct Answer:
B
— Anomaly detection
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Q. Which application of neural networks is used for generating realistic images?
A.
Generative Adversarial Networks (GANs)
B.
Reinforcement Learning
C.
Support Vector Machines
D.
Decision Trees
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Solution
Generative Adversarial Networks (GANs) are a type of neural network architecture specifically designed for generating realistic images.
Correct Answer:
A
— Generative Adversarial Networks (GANs)
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Q. Which application of neural networks is used in autonomous vehicles?
A.
Route optimization
B.
Object detection
C.
Data storage
D.
User interface design
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Solution
Neural networks are employed in object detection to identify and classify objects in the vehicle's environment.
Correct Answer:
B
— Object detection
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Q. Which application of supervised learning can help in diagnosing diseases?
A.
Predicting patient outcomes based on historical data
B.
Clustering patients with similar symptoms
C.
Generating synthetic medical images
D.
Analyzing patient demographics
Show solution
Solution
Predicting patient outcomes based on historical data is a direct application of supervised learning in diagnosing diseases.
Correct Answer:
A
— Predicting patient outcomes based on historical data
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Q. Which application uses a stack to reverse a string?
A.
Queue
B.
Stack
C.
Graph
D.
Tree
Show solution
Solution
A stack can be used to reverse a string by pushing each character onto the stack and then popping them off.
Correct Answer:
B
— Stack
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Q. Which application uses both stacks and queues?
A.
Depth-first search
B.
Breadth-first search
C.
Expression evaluation
D.
Memory allocation
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Solution
Expression evaluation often uses stacks for operators and operands, while queues can be used for managing the order of operations.
Correct Answer:
C
— Expression evaluation
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Q. Which assumption is NOT required for linear regression?
A.
Linearity
B.
Homoscedasticity
C.
Independence of errors
D.
Normality of predictors
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Solution
Linear regression does not require the predictors to be normally distributed; it only requires the residuals to be normally distributed.
Correct Answer:
D
— Normality of predictors
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Q. Which balancing operation is performed when an AVL tree becomes unbalanced after an insertion?
A.
Left Rotation
B.
Right Rotation
C.
Left-Right Rotation
D.
Right-Left Rotation
Show solution
Solution
Depending on the case, AVL trees may perform Left Rotation, Right Rotation, Left-Right Rotation, or Right-Left Rotation to rebalance.
Correct Answer:
A
— Left Rotation
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Q. Which binary tree traversal is best for evaluating expressions in compilers?
A.
Pre-order traversal
B.
In-order traversal
C.
Post-order traversal
D.
Level-order traversal
Show solution
Solution
Post-order traversal is used in evaluating expressions in compilers, as it processes operators after their operands.
Correct Answer:
C
— Post-order traversal
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Q. Which binary tree traversal is best suited for generating a sorted list of elements?
A.
In-order traversal
B.
Pre-order traversal
C.
Post-order traversal
D.
Level-order traversal
Show solution
Solution
In-order traversal of a binary search tree yields the elements in sorted order.
Correct Answer:
A
— In-order traversal
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Q. Which cloud ML service feature allows for easy deployment of models?
A.
Model versioning
B.
Data cleaning
C.
Manual coding
D.
Local execution
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Solution
Model versioning is a feature that facilitates easy deployment and management of different model versions in cloud ML services.
Correct Answer:
A
— Model versioning
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Q. Which cloud ML service is known for its AutoML capabilities?
A.
Amazon SageMaker
B.
Microsoft Azure ML
C.
IBM Watson
D.
All of the above
Show solution
Solution
All of the mentioned services, including Amazon SageMaker, Microsoft Azure ML, and IBM Watson, offer AutoML capabilities.
Correct Answer:
D
— All of the above
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Q. Which cloud ML service is specifically designed for building and deploying machine learning models?
A.
Google BigQuery
B.
AWS SageMaker
C.
Microsoft Excel
D.
Dropbox
Show solution
Solution
AWS SageMaker is a cloud ML service designed for building, training, and deploying machine learning models at scale.
Correct Answer:
B
— AWS SageMaker
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Q. Which cloud service is commonly used for deploying machine learning models?
A.
Google Cloud ML Engine
B.
Microsoft Excel
C.
Apache Hadoop
D.
Jupyter Notebook
Show solution
Solution
Google Cloud ML Engine is a cloud service specifically designed for deploying machine learning models at scale.
Correct Answer:
A
— Google Cloud ML Engine
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Q. Which cloud service is often used for deploying machine learning models?
A.
Google Cloud Storage
B.
Amazon S3
C.
Microsoft Azure Machine Learning
D.
All of the above
Show solution
Solution
Microsoft Azure Machine Learning is specifically designed for deploying machine learning models.
Correct Answer:
C
— Microsoft Azure Machine Learning
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Q. Which clustering algorithm is based on density?
A.
K-Means
B.
Hierarchical Clustering
C.
DBSCAN
D.
Gaussian Mixture Model
Show solution
Solution
DBSCAN (Density-Based Spatial Clustering of Applications with Noise) identifies clusters based on the density of data points.
Correct Answer:
C
— DBSCAN
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Q. Which clustering algorithm is based on the concept of density?
A.
K-Means
B.
Hierarchical Clustering
C.
DBSCAN
D.
Gaussian Mixture Model
Show solution
Solution
DBSCAN (Density-Based Spatial Clustering of Applications with Noise) identifies clusters based on the density of data points.
Correct Answer:
C
— DBSCAN
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Q. Which clustering algorithm is best for identifying clusters of varying shapes and sizes?
A.
K-Means
B.
DBSCAN
C.
Agglomerative Clustering
D.
Gaussian Mixture Model
Show solution
Solution
DBSCAN is effective for identifying clusters of varying shapes and sizes, as it groups points based on density.
Correct Answer:
B
— DBSCAN
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