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Computer Science Unit 1 – Principles of Computer Science 2026 | Study Guide, Practice Questions, Answers, Rationales & Exam Review

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Prepare for Computer Science Unit 1 – Principles of Computer Science with focused study material covering foundational computer science concepts, programming and coding fundamentals, algorithms, data structures, computer systems, computational thinking, problem-solving, and key terminology. Includes practice questions, answers, and rationales to reinforce essential concepts and support effective Unit 1 revision, exam preparation, and review.

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Computer Science Unit 1 –
Principles of Computer
Science 2026 | Study
Guide, Practice Questions,
Answers, Rationales &
Exam Review | Complete
Ethics Study Guide




Updated 2026 Questions and Answers
100% Verified Exam Prep and Comprehensive
Rationales
Included

, Decomposition Breaking down a problem into smaller sub-problems.




Abstraction Removing unnecessary details from a problem to make it easier to understand.




Model A generalized version of a problem




Algorithmic Thinking Problem-Solving abilities relating to algorithms




Computational Thinking The way a computer solves problems
A habit of asking "How can computing help me solve problems?"



Data Types A means of classifying different data




Integer A whole number




Float Numbers that have a decimal point and a fractional part




Boolean True/False statement




Character A single letter, number or symbol in a given character set




String A sequence of characters




Casting Changing the data type

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