MCQ Collection
Computer Science 408 MCQs
Practice Computer Science 408 questions with answers and explanations.
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Correct Answer: A. Users and processes should receive only the permissions necessary for their tasks
Explanation:
Limiting permissions reduces the impact of mistakes and compromised accounts.
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Correct Answer: C. A binary digit can represent one of two states, 0 or 1
Explanation:
Binary uses base two, so each bit has two possible values and positional weights are powers of two.
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Correct Answer: D. An operating system manages hardware resources and provides services to applications
Explanation:
Operating systems coordinate processes, memory, storage, devices and user/application interfaces.
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Correct Answer: C. Big-O notation describes how resource use grows with input size
Explanation:
Asymptotic notation characterises growth rates rather than exact machine-specific time.
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Correct Answer: A. A primary key uniquely identifies each row in a table
Explanation:
Primary-key values are unique and support reliable row identification and relationships.
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Correct Answer: B. Testing seeks evidence about defects and behaviour but cannot prove the complete absence of defects
Explanation:
Testing samples behaviour against expectations; exhaustive proof is usually infeasible.
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Correct Answer: D. Users and processes should receive only the permissions necessary for their tasks
Explanation:
Limiting permissions reduces the impact of mistakes and compromised accounts.
Choose an option to check your answer.
Correct Answer: C. A binary digit can represent one of two states, 0 or 1
Explanation:
Binary uses base two, so each bit has two possible values and positional weights are powers of two.
Choose an option to check your answer.
Correct Answer: D. An operating system manages hardware resources and provides services to applications
Explanation:
Operating systems coordinate processes, memory, storage, devices and user/application interfaces.
Choose an option to check your answer.
Correct Answer: C. Big-O notation describes how resource use grows with input size
Explanation:
Asymptotic notation characterises growth rates rather than exact machine-specific time.
Choose an option to check your answer.
Correct Answer: D. A primary key uniquely identifies each row in a table
Explanation:
Primary-key values are unique and support reliable row identification and relationships.
Choose an option to check your answer.
Correct Answer: A. Normalisation reduces avoidable redundancy and update anomalies
Explanation:
Normalisation decomposes data structures to improve consistency while preserving meaningful dependencies.
