Code coverage metrics in Software Engineering - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to calculate the percentage of lines covered by tests.

Software Engineering

coverage_percentage = (covered_lines / [1]) * 100

Drag options to blanks, or click blank then click option'

Atotal_lines

Btest_lines

Cuncovered_lines

Dexecuted_lines

Attempts:

3 left

💡 Hint

Common Mistakes

Using test lines instead of total lines

Using uncovered lines as denominator

The total number of lines in the code is used as the denominator to calculate coverage percentage.

2fill in blank

medium

Complete the code to filter out functions that have zero coverage.

Software Engineering

functions_with_coverage = {f: c for f, c in coverage_data.items() if c > [1]

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A0

B1

C-1

D100

Attempts:

3 left

💡 Hint

Common Mistakes

Using 1 excludes functions with partial coverage

Using 100 excludes all but fully covered functions

Functions with coverage greater than zero are considered covered.

3fill in blank

hard

Fix the error in the code to calculate branch coverage correctly.

Software Engineering

branch_coverage = (covered_branches / [1]) * 100

Drag options to blanks, or click blank then click option'

Atotal_lines

Btotal_branches

Ccovered_branches

Dexecuted_branches

Attempts:

3 left

💡 Hint

Common Mistakes

Using covered branches as denominator

Using total lines instead of branches

Branch coverage is the ratio of covered branches to total branches.

4fill in blank

hard

Fill both blanks to create a dictionary of functions with coverage above 80%.

Software Engineering

high_coverage_funcs = {f: c for f, c in coverage_data.items() if c [1] [2]

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A>

B80

C>=

D75

Attempts:

3 left

💡 Hint

Common Mistakes

Using '>=' includes 80% exactly

Using 75 is too low threshold

The code filters functions with coverage greater than 80%.

5fill in blank

hard

Fill all three blanks to create a summary dictionary with function names in uppercase and coverage above 50%.

Software Engineering

summary = { [1]: [2] for func, cov in coverage_data.items() if cov [3] 50 }

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Afunc.upper()

Bcov

C>

Dfunc.lower()

Attempts:

3 left

💡 Hint

Common Mistakes

Using func.lower() instead of upper

Using '<' instead of '>' for filtering

The dictionary comprehension uses uppercase function names, coverage values, and filters coverage greater than 50%.