Fitness for purpose and efficiency (Edexcel GCSE Computer Science): Flashcards

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Fitness for purpose and efficiency
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Fitness for purpose meaning

Program does exactly what it's supposed to do

Efficiency in programming meaning

Using least computer power, memory, and time possible

Things to check for efficiency

Comparisons, loops, memory usage, unnecessary data copies

Loop optimization: early stopping benefit

Stop loop when you find what you're looking for

Why sort data before searching

Allows more efficient searching and early termination

While loops advantage over for loops

Can stop early when don't need to check everything

Lists vs separate variables for similar data

Use single lists instead of multiple separate variables

Memory efficiency: data copying

Don't make unnecessary copies of data

Early termination in sorted search means

Stop when you pass where the number should be

When to use dictionaries

For quick lookups of data

Nested loops efficiency issue

Avoid them when possible for better efficiency

Memory optimization: variable reuse

Reuse variables where appropriate

Common mistake: loops after finding target

Not stopping loops early when answer found

Common mistake: similar data storage

Using separate variables instead of lists

Key measures of program efficiency

Count comparisons and loop passes

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