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 algorithms uses dynamic programming to find the shortest path in a graph?
A.
Dijkstra's Algorithm
B.
Bellman-Ford Algorithm
C.
A* Search
D.
Depth First Search
Show solution
Solution
The Bellman-Ford Algorithm uses dynamic programming to find the shortest path in a graph with negative weights.
Correct Answer:
B
— Bellman-Ford Algorithm
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Q. Which of the following algorithms uses dynamic programming to solve the problem of matrix chain multiplication?
A.
Dijkstra's Algorithm
B.
Floyd-Warshall Algorithm
C.
Bellman-Ford Algorithm
D.
Matrix Chain Order
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Solution
The Matrix Chain Order algorithm uses dynamic programming to find the most efficient way to multiply a given sequence of matrices.
Correct Answer:
D
— Matrix Chain Order
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Q. Which of the following algorithms uses dynamic programming to solve the problem of finding the shortest path in a weighted graph?
A.
Dijkstra's Algorithm
B.
Bellman-Ford Algorithm
C.
A* Search
D.
Depth-First Search
Show solution
Solution
The Bellman-Ford Algorithm uses dynamic programming to find the shortest path in a weighted graph, especially when negative weights are present.
Correct Answer:
B
— Bellman-Ford Algorithm
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Q. Which of the following algorithms uses dynamic programming to solve the problem?
A.
Dijkstra's Algorithm
B.
Merge Sort
C.
Floyd-Warshall Algorithm
D.
Quick Sort
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Solution
The Floyd-Warshall Algorithm uses dynamic programming to find the shortest paths in a weighted graph.
Correct Answer:
C
— Floyd-Warshall Algorithm
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Q. Which of the following applications can be efficiently solved using a stack?
A.
Undo functionality in text editors
B.
Breadth-first search in graphs
C.
Finding the shortest path in a weighted graph
D.
Sorting an array
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Solution
Stacks are commonly used for implementing undo functionality in text editors, as they allow for easy backtracking of actions.
Correct Answer:
A
— Undo functionality in text editors
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Q. Which of the following applications can be solved using BFS?
A.
Finding connected components
B.
Topological sorting
C.
Cycle detection
D.
Finding strongly connected components
Show solution
Solution
BFS can be used to find connected components in an undirected graph.
Correct Answer:
A
— Finding connected components
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Q. Which of the following applications can benefit from clustering?
A.
Customer segmentation
B.
Spam detection
C.
Image classification
D.
Time series forecasting
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Solution
Customer segmentation is a common application of clustering, where customers are grouped based on purchasing behavior.
Correct Answer:
A
— Customer segmentation
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Q. Which of the following applications can benefit from Dijkstra's algorithm?
A.
GPS navigation systems
B.
Sorting large datasets
C.
Finding duplicates in a list
D.
Binary search in a sorted array
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Solution
GPS navigation systems can benefit from Dijkstra's algorithm as it helps in calculating the shortest routes between locations.
Correct Answer:
A
— GPS navigation systems
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Q. Which of the following applications can Dijkstra's algorithm be used for?
A.
Finding the minimum spanning tree
B.
Routing in computer networks
C.
Sorting a list of numbers
D.
Searching for an element in a database
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Solution
Dijkstra's algorithm is commonly used in routing algorithms for computer networks to find the shortest path for data packets.
Correct Answer:
B
— Routing in computer networks
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Q. Which of the following applications can utilize binary search?
A.
Finding the first occurrence of a number
B.
Finding the last occurrence of a number
C.
Finding the square root of a number
D.
All of the above
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Solution
Binary search can be adapted for various applications, including finding occurrences and calculating square roots.
Correct Answer:
D
— All of the above
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Q. Which of the following applications is best suited for AVL trees?
A.
Database indexing.
B.
Memory management.
C.
Real-time applications.
D.
Static data storage.
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Solution
AVL trees are well-suited for database indexing where frequent searches are required due to their balanced nature.
Correct Answer:
A
— Database indexing.
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Q. Which of the following applications is NOT suitable for linear regression?
A.
Predicting house prices based on features
B.
Estimating the impact of temperature on ice cream sales
C.
Classifying images into categories
D.
Forecasting stock prices based on historical data
Show solution
Solution
Classifying images into categories is not suitable for linear regression, as it is a classification task rather than a regression task.
Correct Answer:
C
— Classifying images into categories
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Q. Which of the following applications is well-suited for SVM?
A.
Image classification
B.
Time series forecasting
C.
Text generation
D.
Reinforcement learning
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Solution
SVM is well-suited for image classification tasks due to its effectiveness in high-dimensional spaces.
Correct Answer:
A
— Image classification
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Q. Which of the following assumptions is NOT required for linear regression?
A.
Linearity
B.
Homoscedasticity
C.
Independence of errors
D.
Normality of predictors
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Solution
While linear regression assumes linearity, homoscedasticity, and independence of errors, it does not require the predictors to be normally distributed.
Correct Answer:
D
— Normality of predictors
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Q. Which of the following best describes 'A/B testing' in the context of model deployment?
A.
Training two models simultaneously
B.
Comparing two versions of a model to determine which performs better
C.
Deploying a model without testing
D.
None of the above
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Solution
A/B testing involves comparing two versions of a model to evaluate which one performs better in a real-world setting.
Correct Answer:
B
— Comparing two versions of a model to determine which performs better
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Q. Which of the following best describes 'AutoML' in cloud ML services?
A.
Automated machine learning processes
B.
Manual model tuning
C.
Basic data visualization
D.
Static model training
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Solution
AutoML refers to automated machine learning processes that simplify the model development lifecycle.
Correct Answer:
A
— Automated machine learning processes
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Q. Which of the following best describes 'model drift'?
A.
A decrease in model accuracy over time
B.
The process of retraining a model
C.
The introduction of new features
D.
A method for optimizing model performance
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Solution
Model drift refers to a decrease in model accuracy over time, often due to changes in the underlying data distribution.
Correct Answer:
A
— A decrease in model accuracy over time
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Q. Which of the following best describes 'shadow deployment'?
A.
Deploying a model alongside the current model without affecting users
B.
Completely replacing the old model with a new one
C.
Deploying a model only during off-peak hours
D.
Using a model for training while another is in production
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Solution
Shadow deployment involves deploying a new model alongside the current model without affecting users, allowing for performance comparison without risk.
Correct Answer:
A
— Deploying a model alongside the current model without affecting users
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Q. Which of the following best describes 'tokenization'?
A.
The process of generating machine code
B.
The process of converting source code into tokens
C.
The process of optimizing code
D.
The process of parsing syntax
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Solution
Tokenization is the process of converting source code into tokens that can be processed by the compiler.
Correct Answer:
B
— The process of converting source code into tokens
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Q. Which of the following best describes a real-world application of queues?
A.
Call center systems
B.
File compression algorithms
C.
Sorting algorithms
D.
Binary search trees
Show solution
Solution
Queues are commonly used in call center systems to manage incoming calls in the order they are received.
Correct Answer:
A
— Call center systems
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Q. Which of the following best describes a stack?
A.
First In First Out
B.
Last In First Out
C.
Random Access
D.
Ordered Collection
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Solution
A stack operates on a Last In First Out (LIFO) principle, meaning the last element added is the first one to be removed.
Correct Answer:
B
— Last In First Out
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Q. Which of the following best describes inherited attributes?
A.
Attributes passed from parent to child nodes
B.
Attributes computed from child nodes
C.
Attributes that do not affect the translation
D.
Attributes that are only used in semantic actions
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Solution
Inherited attributes are attributes passed from parent to child nodes in syntax-directed translation.
Correct Answer:
A
— Attributes passed from parent to child nodes
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Q. Which of the following best describes supervised learning?
A.
Learning from unlabeled data
B.
Learning from labeled data
C.
Learning without feedback
D.
Learning through reinforcement
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Solution
Supervised learning involves learning from labeled data, where the model is trained on input-output pairs.
Correct Answer:
B
— Learning from labeled data
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Q. Which of the following best describes synthesized attributes?
A.
Attributes that are passed down from parent to child nodes
B.
Attributes that are computed from the values of child nodes
C.
Attributes that are used only during lexical analysis
D.
Attributes that are not used in syntax-directed translation
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Solution
Synthesized attributes are computed from the values of child nodes in the parse tree.
Correct Answer:
B
— Attributes that are computed from the values of child nodes
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Q. Which of the following best describes the binary search algorithm?
A.
Iterative only
B.
Recursive only
C.
Both iterative and recursive
D.
None of the above
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Solution
Binary search can be implemented using both iterative and recursive approaches.
Correct Answer:
C
— Both iterative and recursive
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Q. Which of the following best describes the concept of 'model drift'?
A.
The model's performance improves over time
B.
The model's predictions become less accurate due to changes in data distribution
C.
The model's architecture changes during deployment
D.
The model is retrained with new data
Show solution
Solution
Model drift occurs when the model's predictions become less accurate due to changes in the underlying data distribution over time.
Correct Answer:
B
— The model's predictions become less accurate due to changes in data distribution
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Q. Which of the following best describes the divide-and-conquer approach used in binary search?
A.
Solving a problem by breaking it down into smaller subproblems
B.
Using a single loop to iterate through elements
C.
Recursively calling the same function without any condition
D.
Sorting the array before searching
Show solution
Solution
Binary search uses the divide-and-conquer strategy by dividing the array into halves to find the target.
Correct Answer:
A
— Solving a problem by breaking it down into smaller subproblems
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Q. Which of the following best describes the iterative approach to binary search?
A.
Uses recursion
B.
Uses a loop to narrow down the search
C.
Requires additional data structures
D.
Always returns the first occurrence
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Solution
The iterative approach uses a loop to continuously narrow down the search range until the target is found or the range is empty.
Correct Answer:
B
— Uses a loop to narrow down the search
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Q. Which of the following best describes the process of binary search?
A.
Iteratively checking each element
B.
Dividing the array into halves
C.
Sorting the array first
D.
Using a hash table
Show solution
Solution
Binary search works by dividing the array into halves to locate the target value.
Correct Answer:
B
— Dividing the array into halves
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Q. Which of the following best describes the relationship between a lexer and a parser?
A.
The lexer generates machine code, while the parser checks syntax
B.
The lexer produces tokens, which the parser uses to build a syntax tree
C.
The lexer and parser perform the same function
D.
The parser generates tokens, while the lexer checks syntax
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Solution
The lexer produces tokens that the parser uses to build a syntax tree, making them complementary components in the compilation process.
Correct Answer:
B
— The lexer produces tokens, which the parser uses to build a syntax tree
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