MCQ Collection
China MCQs
Practice China questions with answers and explanations.
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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: D. 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: B. 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: C. Normalisation reduces avoidable redundancy and update anomalies
Explanation:
Normalisation decomposes data structures to improve consistency while preserving meaningful dependencies.
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Correct Answer: C. IP handles addressing and routing, while TCP provides reliable ordered delivery for a connection
Explanation:
The Internet protocol suite separates network-layer routing from transport-layer reliability.
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Correct Answer: A. 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: B. 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: D. 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: A. 系统性
Explanation:
“系统性”可描述性质或状态；其他选项主要是名词或动词。
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Correct Answer: D. 我今天去学校学习。
Explanation:
汉语基本语序通常是“主语＋时间＋地点/动作”，因此“我今天去学校学习”最自然。
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Correct Answer: B. 明天上午九点
Explanation:
材料明确说“明天上午九点”，其余时间没有在材料中出现。
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Correct Answer: D. 明天上午九点
Explanation:
材料明确说“明天上午九点”，其余时间没有在材料中出现。
