MCQ Collection
NCRE Level 4 MCQs
Practice NCRE Level 4 questions with answers and explanations.
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Correct Answer: A. Risk management identifies uncertain events, estimates impact and plans mitigation or response
Explanation:
Proactive risk work helps teams reduce likelihood, impact or recovery time.
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Correct Answer: B. A transaction groups operations so consistency can be preserved across success or failure
Explanation:
Transaction properties help preserve consistent state when multiple operations must succeed together or be rolled back.
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Correct Answer: D. A transaction groups operations so consistency can be preserved across success or failure
Explanation:
Transaction properties help preserve consistent state when multiple operations must succeed together or be rolled back.
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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: D. 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: D. 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: 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. 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: B. 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: C. Encapsulation groups data with methods and controls access to internal state
Explanation:
Encapsulation supports modular design by hiding implementation details behind a defined interface.
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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.
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Correct Answer: A. Architecture decisions balance performance, cost, reliability and workload requirements
Explanation:
System design requires trade-offs among processor, memory, storage, I/O, cost and reliability.
