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 a common optimization algorithm used in training neural networks?
A.
K-Means
B.
Gradient Descent
C.
Principal Component Analysis
D.
Support Vector Machine
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Solution
Gradient Descent is a widely used optimization algorithm for minimizing the loss function in neural networks.
Correct Answer:
B
— Gradient Descent
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Q. Which of the following is a common programming language used in web development?
A.
Python
B.
HTML
C.
Java
D.
All of the above
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Solution
All of the above are common programming languages used in web development.
Correct Answer:
D
— All of the above
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Q. Which of the following is a common real-world application of dynamic programming?
A.
Image compression
B.
Network routing
C.
Stock market prediction
D.
Resource allocation
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Solution
Dynamic programming is often used in resource allocation problems where optimal distribution of limited resources is required.
Correct Answer:
D
— Resource allocation
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Q. Which of the following is a common technique for feature selection?
A.
Principal Component Analysis (PCA)
B.
K-Means Clustering
C.
Linear Regression
D.
Support Vector Machines
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Solution
Principal Component Analysis (PCA) is commonly used for feature selection by reducing dimensionality while retaining variance.
Correct Answer:
A
— Principal Component Analysis (PCA)
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Q. Which of the following is a common technique for handling missing numerical data?
A.
One-hot encoding
B.
Mean imputation
C.
Label encoding
D.
Feature scaling
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Solution
Mean imputation is a common technique where missing values are replaced with the mean of the available data.
Correct Answer:
B
— Mean imputation
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Q. Which of the following is a common technique in feature selection?
A.
Principal Component Analysis (PCA)
B.
K-means Clustering
C.
Support Vector Machines
D.
Random Forest Regression
Show solution
Solution
Principal Component Analysis (PCA) is used to reduce dimensionality and select important features.
Correct Answer:
A
— Principal Component Analysis (PCA)
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Q. Which of the following is a common technique to prevent overfitting in CNNs?
A.
Increasing the learning rate
B.
Using dropout layers
C.
Reducing the number of layers
D.
Using a smaller batch size
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Solution
Using dropout layers is a common technique to prevent overfitting by randomly setting a fraction of input units to 0 during training.
Correct Answer:
B
— Using dropout layers
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Q. Which of the following is a common technique used in code optimization?
A.
Inlining functions
B.
Adding more comments
C.
Increasing variable scope
D.
Using more complex data structures
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Solution
Inlining functions is a common technique used in code optimization to reduce function call overhead.
Correct Answer:
A
— Inlining functions
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Q. Which of the following is a common technique used in feature selection?
A.
Principal Component Analysis (PCA)
B.
K-Means Clustering
C.
Support Vector Machines (SVM)
D.
Random Forest Regression
Show solution
Solution
Principal Component Analysis (PCA) is a dimensionality reduction technique that can also be used for feature selection by identifying the most important features.
Correct Answer:
A
— Principal Component Analysis (PCA)
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Q. Which of the following is a common technique used in lexical analysis?
A.
Recursive descent parsing
B.
Finite state machines
C.
Dynamic programming
D.
Backtracking
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Solution
Finite state machines are commonly used in lexical analysis to recognize tokens based on regular expressions.
Correct Answer:
B
— Finite state machines
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Q. Which of the following is a common tool used for model deployment?
A.
TensorFlow Serving
B.
Pandas
C.
NumPy
D.
Matplotlib
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Solution
TensorFlow Serving is a popular tool specifically designed for deploying machine learning models in production environments.
Correct Answer:
A
— TensorFlow Serving
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Q. Which of the following is a common use case for Decision Trees?
A.
Image recognition.
B.
Customer segmentation.
C.
Natural language processing.
D.
Time series forecasting.
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Solution
Decision Trees are commonly used for customer segmentation due to their ability to handle categorical data effectively.
Correct Answer:
B
— Customer segmentation.
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Q. Which of the following is a common use case for Random Forests?
A.
Image recognition.
B.
Time series forecasting.
C.
Spam detection.
D.
All of the above.
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Solution
Random Forests can be applied to various tasks, including image recognition, time series forecasting, and spam detection.
Correct Answer:
D
— All of the above.
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Q. Which of the following is a common use of supervised learning in marketing?
A.
Customer segmentation
B.
Churn prediction
C.
Market basket analysis
D.
Anomaly detection
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Solution
Churn prediction is a common application of supervised learning in marketing, helping businesses identify customers likely to leave.
Correct Answer:
B
— Churn prediction
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Q. Which of the following is a connection-oriented protocol?
A.
UDP
B.
IP
C.
TCP
D.
ICMP
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Solution
TCP (Transmission Control Protocol) is a connection-oriented protocol that ensures reliable data transmission.
Correct Answer:
C
— TCP
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Q. Which of the following is a disadvantage of Decision Trees?
A.
They can handle both numerical and categorical data
B.
They are prone to overfitting
C.
They are easy to interpret
D.
They require less data
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Solution
Decision Trees are prone to overfitting, especially when they are deep and complex.
Correct Answer:
B
— They are prone to overfitting
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Q. Which of the following is a disadvantage of DFS?
A.
It can get stuck in deep paths.
B.
It requires more memory than BFS.
C.
It cannot be implemented recursively.
D.
It is slower than BFS.
Show solution
Solution
DFS can get stuck in deep paths, leading to inefficient traversal in certain graphs.
Correct Answer:
A
— It can get stuck in deep paths.
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Q. Which of the following is a disadvantage of K-means clustering?
A.
It is sensitive to outliers
B.
It requires the number of clusters to be specified in advance
C.
It can converge to local minima
D.
All of the above
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Solution
All of the listed options are disadvantages of K-means clustering, making it sensitive to outliers, requiring prior knowledge of the number of clusters, and potentially converging to local minima.
Correct Answer:
D
— All of the above
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Q. Which of the following is a disadvantage of the K-means algorithm?
A.
It can handle large datasets efficiently
B.
It requires the number of clusters to be specified in advance
C.
It is sensitive to outliers
D.
It can be used for both supervised and unsupervised learning
Show solution
Solution
A key disadvantage of K-means is that it requires the user to specify the number of clusters beforehand, which may not always be known.
Correct Answer:
B
— It requires the number of clusters to be specified in advance
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Q. Which of the following is a disadvantage of using a linked list over an array?
A.
Dynamic size
B.
Ease of insertion/deletion
C.
Memory overhead
D.
Random access
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Solution
Linked lists do not allow random access to elements, unlike arrays which provide direct access via indices.
Correct Answer:
D
— Random access
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Q. Which of the following is a disadvantage of using arrays?
A.
Fixed size
B.
Random access
C.
Easy to implement
D.
Memory locality
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Solution
Arrays have a fixed size, which can be a disadvantage when the number of elements is not known in advance.
Correct Answer:
A
— Fixed size
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Q. Which of the following is a disadvantage of using decision trees for model selection?
A.
They are easy to interpret
B.
They can easily overfit the training data
C.
They handle both numerical and categorical data
D.
They require less data preprocessing
Show solution
Solution
Decision trees can easily overfit the training data, especially if they are not pruned or if the tree is too deep.
Correct Answer:
B
— They can easily overfit the training data
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Q. Which of the following is a disadvantage of using linked lists over arrays?
A.
Dynamic size
B.
Ease of insertion/deletion
C.
Memory overhead
D.
Random access
Show solution
Solution
Linked lists have a memory overhead due to storing pointers, which makes them less memory efficient compared to arrays.
Correct Answer:
C
— Memory overhead
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Q. Which of the following is a disadvantage of using SVM?
A.
It can handle large datasets efficiently
B.
It is sensitive to the choice of kernel
C.
It provides probabilistic outputs
D.
It is easy to interpret
Show solution
Solution
SVM is sensitive to the choice of kernel, which can significantly affect its performance and requires careful tuning.
Correct Answer:
B
— It is sensitive to the choice of kernel
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Q. Which of the following is a disadvantage of using too many features in a model?
A.
Increased interpretability
B.
Higher computational cost
C.
Better model performance
D.
Reduced risk of overfitting
Show solution
Solution
Using too many features can lead to higher computational costs and may increase the risk of overfitting.
Correct Answer:
B
— Higher computational cost
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Q. Which of the following is a feature of HTTP/2 compared to HTTP/1.1?
A.
Text-based protocol
B.
Multiplexing
C.
Single request per connection
D.
No header compression
Show solution
Solution
HTTP/2 introduces multiplexing, allowing multiple requests and responses to be sent simultaneously over a single connection.
Correct Answer:
B
— Multiplexing
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Q. Which of the following is a key advantage of AVL trees over Red-Black trees?
A.
Faster search times.
B.
Easier to implement.
C.
Less memory usage.
D.
More flexible balancing.
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Solution
AVL trees provide faster search times compared to Red-Black trees due to stricter balancing.
Correct Answer:
A
— Faster search times.
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Q. Which of the following is a key advantage of binary search over linear search?
A.
Simplicity
B.
Efficiency
C.
Memory usage
D.
Flexibility
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Solution
Binary search is more efficient than linear search, especially for large datasets, due to its O(log n) time complexity.
Correct Answer:
B
— Efficiency
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Q. Which of the following is a key advantage of LR parsing over LL parsing?
A.
LR parsing can handle left recursion.
B.
LR parsing is simpler to implement.
C.
LL parsing can handle more complex grammars.
D.
LR parsing requires less memory.
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Solution
LR parsing can handle left recursion, which LL parsing cannot.
Correct Answer:
A
— LR parsing can handle left recursion.
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Q. Which of the following is a key advantage of using Random Forests over a single decision tree?
A.
Faster training time
B.
Higher interpretability
C.
Reduced risk of overfitting
D.
Simpler model structure
Show solution
Solution
Random Forests reduce the risk of overfitting by averaging the predictions of multiple decision trees, leading to better generalization.
Correct Answer:
C
— Reduced risk of overfitting
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