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 challenge in model deployment?
A.
Data preprocessing
B.
Model interpretability
C.
Scalability and performance
D.
Feature selection
Show solution
Solution
Scalability and performance are common challenges in model deployment, as models must handle varying loads and respond quickly in production.
Correct Answer:
C
— Scalability and performance
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Q. Which of the following is a common cloud ML service provider?
A.
Google Cloud AI
B.
Localhost ML
C.
Desktop ML Suite
D.
Offline AI Tools
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Solution
Google Cloud AI is a well-known provider of cloud-based machine learning services.
Correct Answer:
A
— Google Cloud AI
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Q. Which of the following is a common criterion for splitting nodes in Decision Trees?
A.
Mean Squared Error
B.
Gini Impurity
C.
Euclidean Distance
D.
Cross-Entropy
Show solution
Solution
Gini Impurity is a common criterion used for splitting nodes in Decision Trees to measure the impurity of a node.
Correct Answer:
B
— Gini Impurity
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Q. Which of the following is a common data structure used to represent the syntax tree in compilers?
A.
Array
B.
Linked list
C.
Binary tree
D.
Hash table
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Solution
A binary tree is commonly used to represent the syntax tree, where each node represents a construct in the source code.
Correct Answer:
C
— Binary tree
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Q. Which of the following is a common error control method used in data transmission?
A.
Checksum
B.
Encryption
C.
Compression
D.
Segmentation
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Solution
Checksum is a common error control method used to detect errors in data transmission.
Correct Answer:
A
— Checksum
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Q. Which of the following is a common error detected by a lexical analyzer?
A.
Syntax errors
B.
Type errors
C.
Unrecognized characters
D.
Semantic errors
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Solution
A lexical analyzer can detect unrecognized characters that do not match any defined tokens.
Correct Answer:
C
— Unrecognized characters
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Q. Which of the following is a common evaluation metric for classification models?
A.
Mean Squared Error
B.
Accuracy
C.
Silhouette Score
D.
R-squared
Show solution
Solution
Accuracy is a common evaluation metric for classification models, measuring the proportion of correct predictions.
Correct Answer:
B
— Accuracy
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Q. Which of the following is a common evaluation metric for classification problems?
A.
Mean Squared Error
B.
Accuracy
C.
R-squared
D.
Silhouette Score
Show solution
Solution
Accuracy is a common metric used to evaluate the performance of classification models by measuring the proportion of correct predictions.
Correct Answer:
B
— Accuracy
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Q. Which of the following is a common evaluation metric for classification tasks in neural networks?
A.
Mean Absolute Error
B.
F1 Score
C.
Root Mean Squared Error
D.
R-squared
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Solution
F1 Score is a common metric used to evaluate the performance of classification models, balancing precision and recall.
Correct Answer:
B
— F1 Score
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Q. Which of the following is a common evaluation metric for classification tasks?
A.
Mean Squared Error
B.
Accuracy
C.
R-squared
D.
Silhouette Score
Show solution
Solution
Accuracy is a common evaluation metric for classification tasks, measuring the proportion of correct predictions.
Correct Answer:
B
— Accuracy
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Q. Which of the following is a common evaluation metric for image classification tasks?
A.
Mean Squared Error
B.
Accuracy
C.
F1 Score
D.
Confusion Matrix
Show solution
Solution
Accuracy is a common evaluation metric for image classification tasks, measuring the proportion of correctly classified instances.
Correct Answer:
B
— Accuracy
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Q. Which of the following is a common evaluation metric for regression models?
A.
Accuracy
B.
F1 Score
C.
Mean Absolute Error
D.
Confusion Matrix
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Solution
Mean Absolute Error (MAE) is a common evaluation metric for regression models, measuring the average magnitude of errors in predictions.
Correct Answer:
C
— Mean Absolute Error
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Q. Which of the following is a common evaluation metric for SVM classification performance?
A.
Mean Squared Error
B.
Accuracy
C.
Silhouette Score
D.
Confusion Matrix
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Solution
Accuracy is a common evaluation metric used to assess the performance of SVM classifiers by measuring the proportion of correctly classified instances.
Correct Answer:
B
— Accuracy
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Q. Which of the following is a common form of intermediate code generated by syntax-directed translation?
A.
Assembly language
B.
Three-address code
C.
Bytecode
D.
Machine code
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Solution
Three-address code is a common form of intermediate code generated by syntax-directed translation.
Correct Answer:
B
— Three-address code
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Q. Which of the following is a common loss function used for regression tasks in neural networks?
A.
Binary Cross-Entropy
B.
Categorical Cross-Entropy
C.
Mean Squared Error
D.
Hinge Loss
Show solution
Solution
Mean Squared Error (MSE) is commonly used as a loss function for regression tasks.
Correct Answer:
C
— Mean Squared Error
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Q. Which of the following is a common loss function used in neural networks for classification tasks?
A.
Mean Squared Error
B.
Cross-Entropy Loss
C.
Hinge Loss
D.
Log-Cosh Loss
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Solution
Cross-Entropy Loss is widely used for classification tasks as it measures the difference between predicted and actual class probabilities.
Correct Answer:
B
— Cross-Entropy Loss
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Q. Which of the following is a common method for deploying machine learning models?
A.
Batch processing
B.
Real-time inference
C.
Both batch processing and real-time inference
D.
None of the above
Show solution
Solution
Common methods for deploying machine learning models include both batch processing and real-time inference, depending on the application requirements.
Correct Answer:
C
— Both batch processing and real-time inference
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Q. Which of the following is a common method for encoding categorical variables?
A.
Label Encoding
B.
Min-Max Scaling
C.
Standardization
D.
Feature Extraction
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Solution
Label Encoding is a common method for converting categorical variables into numerical format.
Correct Answer:
A
— Label Encoding
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Q. Which of the following is a common method for evaluating the performance of a neural network?
A.
Confusion matrix
B.
Gradient descent
C.
Batch normalization
D.
Dropout
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Solution
A confusion matrix is used to evaluate the performance of a classification model by showing true vs. predicted classifications.
Correct Answer:
A
— Confusion matrix
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Q. Which of the following is a common method for feature extraction?
A.
K-means Clustering
B.
Support Vector Machines
C.
Principal Component Analysis
D.
Decision Trees
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Solution
Principal Component Analysis (PCA) is a technique used to reduce dimensionality by extracting important features.
Correct Answer:
C
— Principal Component Analysis
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Q. Which of the following is a common method for handling imbalanced datasets in classification problems?
A.
Using a larger dataset
B.
Oversampling the minority class
C.
Reducing the number of features
D.
Using a simpler model
Show solution
Solution
Oversampling the minority class is a common method to address class imbalance, helping the model learn better from the underrepresented class.
Correct Answer:
B
— Oversampling the minority class
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Q. Which of the following is a common method for handling missing data in a dataset?
A.
Removing all rows with missing values
B.
Replacing missing values with the mean or median
C.
Ignoring the missing values during training
D.
All of the above
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Solution
Replacing missing values with the mean or median is a common method, though other methods can also be used depending on the context.
Correct Answer:
B
— Replacing missing values with the mean or median
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Q. Which of the following is a common method for handling missing data in feature engineering?
A.
Removing all rows with missing values
B.
Imputing missing values with the mean or median
C.
Ignoring missing values during model training
D.
Using only complete cases for analysis
Show solution
Solution
Imputing missing values with the mean or median is a common method to handle missing data, allowing for the retention of more data points.
Correct Answer:
B
— Imputing missing values with the mean or median
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Q. Which of the following is a common method for handling missing data?
A.
Removing all rows with missing values
B.
Imputing missing values with the mean or median
C.
Ignoring missing values during training
D.
Using a more complex model
Show solution
Solution
Imputing missing values with the mean or median is a common method to handle missing data.
Correct Answer:
B
— Imputing missing values with the mean or median
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Q. Which of the following is a common method for model selection?
A.
Grid Search
B.
Data Augmentation
C.
Feature Engineering
D.
Ensemble Learning
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Solution
Grid Search is a common method for systematically searching for the best model parameters.
Correct Answer:
A
— Grid Search
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Q. Which of the following is a common method for performing constant folding?
A.
Evaluating expressions at compile time
B.
Removing unused variables
C.
Inlining functions
D.
Rearranging code for efficiency
Show solution
Solution
Constant folding involves evaluating constant expressions at compile time to simplify the code.
Correct Answer:
A
— Evaluating expressions at compile time
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Q. Which of the following is a common method for preventing overfitting in Decision Trees?
A.
Increasing the maximum depth of the tree.
B.
Pruning the tree after it has been fully grown.
C.
Using more features.
D.
Decreasing the number of samples.
Show solution
Solution
Pruning the tree after it has been fully grown helps to remove branches that have little importance, thus preventing overfitting.
Correct Answer:
B
— Pruning the tree after it has been fully grown.
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Q. Which of the following is a common method for word embeddings?
A.
TF-IDF
B.
Bag of Words
C.
Word2Vec
D.
Count Vectorization
Show solution
Solution
Word2Vec is a popular method for generating word embeddings that captures semantic relationships between words.
Correct Answer:
C
— Word2Vec
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Q. Which of the following is a common method used to represent the policy in reinforcement learning?
A.
Decision Trees
B.
Neural Networks
C.
Support Vector Machines
D.
Linear Regression
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Solution
Neural networks are often used to represent the policy in reinforcement learning due to their ability to approximate complex functions.
Correct Answer:
B
— Neural Networks
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Q. Which of the following is a common modification to binary search for finding the first occurrence of a target?
A.
Use a linear search
B.
Continue searching in the left half even after finding the target
C.
Sort the array first
D.
Use a stack
Show solution
Solution
To find the first occurrence, continue searching in the left half even after finding the target.
Correct Answer:
B
— Continue searching in the left half even after finding the target
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