Equivalence partitioning in Testing Fundamentals - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is equivalence partitioning in software testing?

Equivalence partitioning is a testing technique that divides input data into groups where test cases from each group are expected to behave the same. This helps reduce the number of test cases while still covering all scenarios.

beginner

Why do testers use equivalence partitioning?

Testers use equivalence partitioning to save time and effort by testing one value from each group instead of all possible inputs, assuming all values in a group behave similarly.

beginner

Give an example of equivalence partitions for an input field that accepts ages from 18 to 60.

The partitions could be: invalid low (below 18), valid (18 to 60), and invalid high (above 60). Testing one value from each partition is enough to check behavior.

intermediate

How does equivalence partitioning relate to boundary value analysis?

Equivalence partitioning groups inputs, while boundary value analysis focuses on testing the edges of those groups because errors often happen at boundaries.

intermediate

What is a common mistake when applying equivalence partitioning?

A common mistake is not identifying all partitions correctly or assuming all values in a partition behave the same without verifying, which can miss defects.

What does equivalence partitioning help testers do?

A Reduce the number of test cases by grouping inputs

B Test only the boundary values

C Write code faster

D Automate all tests

Equivalence partitioning groups inputs to reduce test cases while covering all scenarios.

Which of these is an example of an equivalence partition for a password length of 8 to 12 characters?

A Passwords of length 7, 8, and 13

B Passwords of length 5, 6, and 7

C Passwords of length 8, 10, and 12

D Passwords of length 13, 14, and 15

Lengths 8, 10, and 12 are valid inputs within the partition; 7 and 13 are outside.

Which is NOT a benefit of equivalence partitioning?

A Improves test coverage

B Ensures all code paths are tested

C Helps find defects efficiently

D Reduces test effort

Equivalence partitioning reduces test cases but does not guarantee all code paths are tested.

If an input accepts numbers 1 to 100, which is a valid equivalence partition?

A 1 to 100

B 0 to 50

C 101 to 200

D All negative numbers

1 to 100 is the valid input partition; others are invalid partitions.

What should you test from each equivalence partition?

A Only the smallest value

B All values

C Only the largest value

D At least one representative value

Testing one representative value from each partition is enough to check behavior.

Explain equivalence partitioning and why it is useful in software testing.

Think about how you can test fewer inputs but still cover all cases.

Describe how you would create equivalence partitions for a form field that accepts ages between 18 and 60.

Divide inputs into valid and invalid groups.