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Grade 12 Computer Science and Programming Practice Tests

These Grade 12 Computer Science and Programming practice tests build foundations in coding, algorithms, data structures, databases, web development, cybersecurity, artificial intelligence, testing, and responsible technology use.

Skills covered

  • Programming foundations: variables, conditionals, loops, functions, arrays, Boolean values, tracing, syntax errors, pseudocode, and input validation
  • Algorithms and data structures: binary representation, algorithms, complexity, recursion, stacks, queues, sorting, searching, abstraction, and modularity
  • Data and security: tables, primary keys, SQL retrieval, encryption, authentication, authorization, phishing, backups, sanitization, and data minimization
  • Web and software development: HTML, CSS, APIs, client-server systems, version control, unit testing, documentation, accessibility, responsive design, and deployment
  • Computational thinking and AI: training data, algorithmic bias, ethics, debugging, decomposition, pattern recognition, trade-offs, open source, and project reflection

How to use these practice tests

Trace each step carefully, define the data or system concept, and consider what the program or technology should do under the stated conditions. When questions involve real users, include security, accessibility, privacy, and ethical effects in your reasoning.

For more Grade 12 preparation, return to the College and Career Preparation category.

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Grade 12 Computer Science and Programming Practice Tests

Practice Grade 12 Computer Science and Programming questions about code, algorithms, data structures, databases, web development, security, artificial intelligence, and software projects.

Choose the best answer. Trace the logic, identify the system or data concept, and consider reliability, security, accessibility, and ethical effects where relevant.

10 Questions
0/10 Questions0 %
Correct 0
Incorrect 0
Unanswered 10
1. QuestionMultiple choice

What is binary representation?

Please select an answer first.

Correct answer: A

The correct answer is Representing information using combinations of the digits 0 and 1.

  1. Identify the computer science concept: Determine whether the question concerns programming, algorithms, data structures, systems, web development, security, data, artificial intelligence, or ethics.
  2. Trace the logic or principle: Digital systems use bits with two states to encode numbers, text, images, sound, and instructions.
  3. Check the result: The correct answer is Representing information using combinations of the digits 0 and 1.

Digital systems use bits with two states to encode numbers, text, images, sound, and instructions.

2. QuestionMultiple choice

What is an algorithm?

Please select an answer first.

Correct answer: B

The correct answer is A finite, ordered set of steps for solving a problem or completing a task.

  1. Identify the computer science concept: Determine whether the question concerns programming, algorithms, data structures, systems, web development, security, data, artificial intelligence, or ethics.
  2. Trace the logic or principle: An algorithm describes the logic needed to transform inputs into a desired result.
  3. Check the result: The correct answer is A finite, ordered set of steps for solving a problem or completing a task.

An algorithm describes the logic needed to transform inputs into a desired result.

3. QuestionMultiple choice

What does time complexity describe?

Please select an answer first.

Correct answer: C

The correct answer is How an algorithm’s running time tends to grow as the input size grows.

  1. Identify the computer science concept: Determine whether the question concerns programming, algorithms, data structures, systems, web development, security, data, artificial intelligence, or ethics.
  2. Trace the logic or principle: Time complexity helps compare scalability by describing growth rather than one machine’s single measured time.
  3. Check the result: The correct answer is How an algorithm’s running time tends to grow as the input size grows.

Time complexity helps compare scalability by describing growth rather than one machine’s single measured time.

4. QuestionMultiple choice

What is recursion?

Please select an answer first.

Correct answer: D

The correct answer is A technique in which a function calls itself on a smaller or simpler version of a problem.

  1. Identify the computer science concept: Determine whether the question concerns programming, algorithms, data structures, systems, web development, security, data, artificial intelligence, or ethics.
  2. Trace the logic or principle: A recursive solution needs a base case and progress toward that base case to terminate correctly.
  3. Check the result: The correct answer is A technique in which a function calls itself on a smaller or simpler version of a problem.

A recursive solution needs a base case and progress toward that base case to terminate correctly.

5. QuestionMultiple choice

What is a stack data structure?

Please select an answer first.

Correct answer: A

The correct answer is A last-in, first-out structure in which the most recently added item is removed first.

  1. Identify the computer science concept: Determine whether the question concerns programming, algorithms, data structures, systems, web development, security, data, artificial intelligence, or ethics.
  2. Trace the logic or principle: Stacks support operations such as push and pop and are useful for undo actions, nested calls, and expression processing.
  3. Check the result: The correct answer is A last-in, first-out structure in which the most recently added item is removed first.

Stacks support operations such as push and pop and are useful for undo actions, nested calls, and expression processing.

6. QuestionMultiple choice

What is a queue data structure?

Please select an answer first.

Correct answer: B

The correct answer is A first-in, first-out structure in which the earliest added item is removed first.

  1. Identify the computer science concept: Determine whether the question concerns programming, algorithms, data structures, systems, web development, security, data, artificial intelligence, or ethics.
  2. Trace the logic or principle: Queues model waiting lines and scheduling, where the earliest item is generally handled first.
  3. Check the result: The correct answer is A first-in, first-out structure in which the earliest added item is removed first.

Queues model waiting lines and scheduling, where the earliest item is generally handled first.

7. QuestionMultiple choice

What is the purpose of sorting data?

Please select an answer first.

Correct answer: C

The correct answer is To arrange values according to an order so searching, reading, or processing may become easier.

  1. Identify the computer science concept: Determine whether the question concerns programming, algorithms, data structures, systems, web development, security, data, artificial intelligence, or ethics.
  2. Trace the logic or principle: Sorting improves organization and can support efficient searches, though it does not by itself verify accuracy or remove duplicates.
  3. Check the result: The correct answer is To arrange values according to an order so searching, reading, or processing may become easier.

Sorting improves organization and can support efficient searches, though it does not by itself verify accuracy or remove duplicates.

8. QuestionMultiple choice

What is a binary search able to do when a list is sorted?

Please select an answer first.

Correct answer: D

The correct answer is Repeatedly eliminate about half of the remaining search range.

  1. Identify the computer science concept: Determine whether the question concerns programming, algorithms, data structures, systems, web development, security, data, artificial intelligence, or ethics.
  2. Trace the logic or principle: Binary search uses the ordering to compare with the middle item and discard the half that cannot contain the target.
  3. Check the result: The correct answer is Repeatedly eliminate about half of the remaining search range.

Binary search uses the ordering to compare with the middle item and discard the half that cannot contain the target.

9. QuestionMultiple choice

What is abstraction in computer science?

Please select an answer first.

Correct answer: A

The correct answer is Representing important features while hiding unnecessary implementation details.

  1. Identify the computer science concept: Determine whether the question concerns programming, algorithms, data structures, systems, web development, security, data, artificial intelligence, or ethics.
  2. Trace the logic or principle: Abstraction manages complexity by exposing a useful interface while hiding how the underlying operation is implemented.
  3. Check the result: The correct answer is Representing important features while hiding unnecessary implementation details.

Abstraction manages complexity by exposing a useful interface while hiding how the underlying operation is implemented.

10. QuestionMultiple choice

What is modularity?

Please select an answer first.

Correct answer: B

The correct answer is Dividing a program into separate components with clear responsibilities and interfaces.

  1. Identify the computer science concept: Determine whether the question concerns programming, algorithms, data structures, systems, web development, security, data, artificial intelligence, or ethics.
  2. Trace the logic or principle: Modular design makes code easier to understand, test, reuse, maintain, and change.
  3. Check the result: The correct answer is Dividing a program into separate components with clear responsibilities and interfaces.

Modular design makes code easier to understand, test, reuse, maintain, and change.

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