Suitability of Algorithms (OCR A-Level Computer Science): Quizzes

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Suitability of Algorithms
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What two metrics are used to measure algorithm efficiency?

Execution time and space

What does O(1)O(1) time complexity represent?

Constant time

Which components are included in space complexity measurement?

Input data, temp variables, call stack

What do large inputs require for good performance?

Lower time complexity

What is Bubble Sort's time complexity?

O(n2)O(n^2)

Why is Merge Sort suitable for large data sets?

It has O(nlogn)O(n \log n) time complexity

What does Binary Search require to function?

Sorted data

Which search is suitable for unsorted data?

Linear Search

Why is iterative factorial more suitable than recursive?

More memory-efficient

What is the time complexity of recursive Fibonacci?

O(2n)O(2^n)

With memory constraints, which complexity should you prefer?

Lower space complexity

What common mistake do students make when analysing algorithms?

Focusing only on time complexity

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