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Computer Science and Coding Quizzes

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28 questions · Updated September 2026

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  1. 1. True or False: The term 'byte' consists of 8 bits.

    1. False
    2. True
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    Correct answer: True

    Explanation: A byte is indeed composed of 8 bits, which is the standard unit of data in computer processing.

  2. 2. Which of the following programming languages is primarily used for web development?

    1. JavaScript
    2. Java
    3. Python
    4. C++
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    Correct answer: JavaScript

    Explanation: JavaScript is the dominant language for client-side web development, enabling interactive web pages and dynamic content.

  3. 3. Which algorithm is commonly used for searching an element in a sorted array?

    1. Linear Search
    2. Depth-First Search
    3. Breadth-First Search
    4. Binary Search
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    Correct answer: Binary Search

    Explanation: Binary search is an efficient algorithm for finding an item from a sorted array by repeatedly dividing the search interval in half.

  4. 4. Fill in the blank: The ______ is the main circuit board of a computer that holds the CPU, memory, and other components.

    1. motherboard
    2. graphics card
    3. hard drive
    4. RAM
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    Correct answer: motherboard

    Explanation: The motherboard is a critical component of a computer, serving as the backbone that connects all other parts.

  5. 5. What is the primary function of an operating system?

    1. To provide antivirus protection
    2. To connect to the internet
    3. To manage hardware resources
    4. To execute applications
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    Correct answer: To execute applications

    Explanation: An operating system manages the computer's hardware and software resources, allowing applications to run and interact with the hardware.

  6. 6. What does the acronym 'HTTP' stand for?

    1. HyperText Transfer Protocol
    2. Hyper Transfer Text Protocol
    3. HyperText Transmission Protocol
    4. HighText Transfer Protocol
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    Correct answer: HyperText Transfer Protocol

    Explanation: HTTP stands for HyperText Transfer Protocol, which is the foundation of data communication on the World Wide Web.

  7. 7. What does the term 'Big O notation' primarily describe?

    1. The size of a data structure
    2. The color coding of code
    3. The syntax of a programming language
    4. The performance of an algorithm
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    Correct answer: The performance of an algorithm

    Explanation: Big O notation is used to describe the efficiency of an algorithm in terms of its time and space complexity, focusing on its performance relative to the input size.

  8. 8. In the context of data structures, a stack is LIFO. What does LIFO stand for?

    1. Last In, Final Output
    2. Last In, First Out
    3. Least Important, First Out
    4. Linear Input, First Out
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    Correct answer: Last In, First Out

    Explanation: LIFO stands for Last In, First Out, meaning the last element added to the stack is the first one to be removed.

  9. 9. What is the primary purpose of a compiler in programming?

    1. To manage memory allocation
    2. To execute code directly
    3. To debug code
    4. To convert high-level code to machine code
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    Correct answer: To convert high-level code to machine code

    Explanation: A compiler translates high-level programming language code into machine code, which can be executed by a computer's processor.

  10. 10. What is the purpose of a version control system?

    1. To track changes in code
    2. To manage software bugs
    3. To optimize performance
    4. To compile code
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    Correct answer: To track changes in code

    Explanation: A version control system keeps track of changes to code over time, allowing for collaboration and maintaining a history of modifications.

  11. 11. Fill in the blank: The ______ is a data structure that allows you to store key-value pairs.

    1. queue
    2. hash table
    3. binary tree
    4. stack
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    Correct answer: hash table

    Explanation: A hash table is designed to efficiently store and retrieve data as key-value pairs, making lookups quick.

  12. 12. Which of the following is a common programming paradigm that emphasizes the use of objects?

    1. Procedural programming
    2. Declarative programming
    3. Functional programming
    4. Object-oriented programming
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    Correct answer: Object-oriented programming

    Explanation: Object-oriented programming (OOP) is a paradigm that focuses on the concept of objects, which can contain data and methods.

  13. 13. Fill in the blank: The ______ model describes the structure of a database and how data is stored.

    1. index
    2. table
    3. query
    4. schema
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    Correct answer: schema

    Explanation: The schema defines the organization of data in a database, including how tables relate to one another.

  14. 14. True or False: The first computer programmer is considered to be Ada Lovelace.

    1. True
    2. False
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    Correct answer: True

    Explanation: Ada Lovelace is recognized as the first computer programmer for her work on Charles Babbage's early mechanical general-purpose computer, the Analytical Engine.

  15. 15. Which of the following data structures uses pointers to connect elements?

    1. Stack
    2. Hash Table
    3. Array
    4. Linked List
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    Correct answer: Linked List

    Explanation: A linked list uses pointers to connect nodes, allowing for efficient insertion and deletion operations.

  16. 16. In which year was the first version of the Python programming language released?

    1. 1991
    2. 1995
    3. 1989
    4. 2000
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    Correct answer: 1989

    Explanation: Python was created by Guido van Rossum and first released in 1989, becoming popular for its readability and simplicity.

  17. 17. Which of the following is considered a low-level programming language?

    1. C
    2. Python
    3. Java
    4. Ruby
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    Correct answer: C

    Explanation: C is considered a low-level programming language because it provides little abstraction from the hardware, allowing for direct manipulation of memory.

  18. 18. True or False: Moore's Law states that the number of transistors on a microchip doubles approximately every two years.

    1. True
    2. False
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    Correct answer: True

    Explanation: Moore's Law is an observation made by Gordon Moore, which predicts the exponential increase in the number of transistors on integrated circuits over time.

  19. 19. Which sorting algorithm has the best average-case time complexity?

    1. Bubble Sort
    2. Selection Sort
    3. Quicksort
    4. Insertion Sort
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    Correct answer: Quicksort

    Explanation: Quicksort has an average-case time complexity of O(n log n), making it one of the most efficient sorting algorithms for larger datasets.

  20. 20. Which of the following languages is known for its use in statistical computing and data analysis?

    1. Java
    2. PHP
    3. R
    4. C#
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    Correct answer: R

    Explanation: R is a programming language specifically designed for statistical analysis and data visualization, making it popular among data scientists.

  21. 21. True or False: Java is a compiled language.

    1. False
    2. True
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    Correct answer: False

    Explanation: Java is primarily an interpreted language, as it is compiled into bytecode that runs on the Java Virtual Machine (JVM) rather than directly on hardware.

  22. 22. Which of the following is an example of a NoSQL database?

    1. MySQL
    2. SQLite
    3. MongoDB
    4. PostgreSQL
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    Correct answer: MongoDB

    Explanation: MongoDB is a popular NoSQL database known for its flexibility and scalability, particularly in handling unstructured data.

  23. 23. Which of the following is NOT a type of software development methodology?

    1. Agile
    2. Scrum
    3. Waterfall
    4. Cascading
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    Correct answer: Cascading

    Explanation: Cascading is not a recognized software development methodology, while Agile, Waterfall, and Scrum are widely used approaches.

  24. 24. Fill in the blank: The ______ principle states that a function should do one thing and do it well.

    1. Open/Closed
    2. Liskov Substitution
    3. Single Responsibility
    4. Dependency Inversion
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    Correct answer: Single Responsibility

    Explanation: The Single Responsibility Principle is one of the SOLID principles of object-oriented design, emphasizing that a function should have one reason to change.

  25. 25. Which data structure is optimal for implementing a priority queue?

    1. Linked List
    2. Heap
    3. Array
    4. Stack
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    Correct answer: Heap

    Explanation: A heap is an efficient data structure for implementing a priority queue, allowing for quick access to the highest priority element.

  26. 26. Which of the following is a key feature of object-oriented programming?

    1. Encapsulation
    2. Procedural execution
    3. Inline assembly
    4. Global variables
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    Correct answer: Encapsulation

    Explanation: Encapsulation is a core principle of object-oriented programming that restricts direct access to some of an object's components, promoting modularity.

  27. 27. Which of the following is a characteristic of functional programming?

    1. Stateful computations
    2. Mutability of data
    3. First-class functions
    4. Sequential execution only
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    Correct answer: First-class functions

    Explanation: Functional programming emphasizes first-class functions, where functions can be treated as values and passed as arguments.

  28. 28. Which of the following is a common use case for blockchain technology?

    1. Word processing
    2. Web hosting
    3. Email services
    4. Supply chain management
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    Correct answer: Supply chain management

    Explanation: Blockchain technology is often used in supply chain management to ensure transparency and traceability of goods.

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