Computer Science
Multiple Choice
Questions
(MCQs) – Sets 13
with Detailed Explanations
🎓 Welcome to edusoars.blogspot.com!
Your trusted platform for mastering competitive exams.
We provide a comprehensive and ever-expanding library of Multiple Choice Questions (MCQs) designed not just for practice, but for true conceptual mastery.
What We Cover:
Our expert-curated MCQs span a wide array of high-demand subjects, including:
* Technology & Engineering: Computer Science, Engineering
* Core Academics: Mathematics, Science
* Testing Skills: Aptitude, Reasoning
* General Awareness: General Knowledge
Why Choose Edusoars?
We help you turn practice time into measurable progress:
* Conceptual Clarity: Every single MCQ is accompanied by a detailed, insightful explanation. This is crucial—you don't just learn what the answer is, you understand the concept behind the solution, allowing you to learn effectively from every mistake.
* Realistic Readiness: Test your knowledge with our variety of practice quizzes and simulated tests. They are designed to be as realistic as possible, helping you benchmark your performance and build exam-day confidence.
* Content That Grows: We are constantly adding new material across all subjects, ensuring you always have fresh, relevant content that reflects the latest exam patterns.
> Stop hoping you're prepared. Start knowing you are.
If you are serious about succeeding in your competitive exams, edusoars.blogspot.com is the strategic resource you need to reach your goals.
SET 13 – Computer Science MCQs
✅ No repetition from Sets 1–12
✅ 10 brand-new questions
✅ Each explanation
Level: Class 9–10 / Beginners
1. What is a runtime error?
A. Error before execution
B. Error during program execution
C. Error in spelling
D. Hardware failure
✅ Correct Answer: B
Explanation:
A runtime error occurs while a program is running, after it has successfully compiled or been interpreted. Examples include dividing by zero or accessing invalid memory. Runtime errors cause the program to crash or behave unexpectedly. They are harder to detect beforehand and often depend on user input or system conditions.
2. What is an IDE?
A. Input Data Editor
B. Integrated Development Environment
C. Internet Design Engine
D. Internal Device Emulator
✅ Correct Answer: B
Explanation:
An Integrated Development Environment (IDE) is software that provides tools for writing, testing, and debugging programs in one place. Examples include Visual Studio Code and PyCharm. IDEs make programming easier by offering code editors, error checking, and debugging features, especially helpful for beginners.
3. What is a conditional statement?
A. Repeating code
B. Making decisions in a program
C. Storing values
D. Printing output
✅ Correct Answer: B
Explanation:
A conditional statement allows a program to make decisions based on conditions. Examples include if, else, and switch statements. They control which block of code runs depending on whether a condition is true or false. Conditional statements are essential for logical flow and problem-solving in programs.
4. What is pseudocode?
A. A programming language
B. A diagram
C. Informal description of an algorithm
D. Machine code
✅ Correct Answer: C
Explanation:
Pseudocode is a simple, informal way of writing an algorithm using plain language and programming-like structure. It helps programmers plan logic without worrying about syntax rules. Pseudocode improves understanding, communication, and planning before actual coding begins.
5. What is recursion?
A. A loop
B. A function calling itself
C. An error
D. A data type
✅ Correct Answer: B
Explanation:
Recursion occurs when a function calls itself to solve a problem in smaller steps. Each recursive call works toward a base case to stop repetition. Recursion is commonly used in problems like factorial calculation and tree traversal. It simplifies complex problems but must be used carefully to avoid infinite loops.
6. What is a database table?
A. A chart
B. A collection of rows and columns
C. A file extension
D. An output device
✅ Correct Answer: B
Explanation:
A database table stores data in a structured format of rows and columns. Each row represents a record, and each column represents a field. For example, a student table may contain roll number, name, and marks. Tables make data organized, searchable, and easy to manage.
7. What does SQL stand for?
A. Structured Query Language
B. Simple Question Logic
C. Standard Query List
D. System Query Language
✅ Correct Answer: A
Explanation:
SQL stands for Structured Query Language. It is used to create, manage, and retrieve data from databases. SQL allows users to insert, update, delete, and query data. It is widely used in applications, websites, and business systems for efficient data management.
8. What is data validation?
A. Data deletion
B. Data storage
C. Checking data accuracy and correctness
D. Data compression
✅ Correct Answer: C
Explanation:
Data validation ensures that input data is accurate, complete, and reasonable before processing. For example, checking that age is not negative. Validation helps prevent errors, improves data quality, and ensures reliable results in computer systems and databases.
9. What is a chart used for?
A. Writing code
B. Storing data
C. Representing data visually
D. Running programs
✅ Correct Answer: C
Explanation:
A chart is used to represent data visually using graphs like bar charts, pie charts, and line graphs. Charts help users understand trends, patterns, and comparisons easily. They are widely used in presentations, reports, and spreadsheets to make data more understandable.
10. What is an operating system update?
A. Removing files
B. Changing hardware
C. Improving system performance and security
D. Formatting memory
✅ Correct Answer: C
Explanation:
An operating system update improves system performance, adds new features, and fixes security vulnerabilities. Updates protect computers from threats and improve stability. Regular updates are important to keep the system secure, compatible, and functioning efficiently.
Thank you for visiting! We wish you the absolute best of luck in your studies!
