Boundary value analysis in Testing Fundamentals - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is Boundary Value Analysis (BVA) in software testing?

Boundary Value Analysis is a testing technique that focuses on testing the values at the edges or boundaries of input domains, where errors are most likely to occur.

beginner

Why do testers focus on boundary values rather than just any random values?

Because errors often happen at the edges of input ranges, testing boundary values helps find defects that might be missed by testing only typical or random values.

intermediate

List the typical boundary values tested in Boundary Value Analysis.

The typical boundary values are: the minimum value, just below the minimum, just above the minimum, the maximum value, just below the maximum, and just above the maximum.

intermediate

How is Boundary Value Analysis related to Equivalence Partitioning?

Equivalence Partitioning divides input data into groups where test cases are expected to behave similarly, while Boundary Value Analysis tests the edges of these groups to catch errors at the limits.

beginner

Give a simple example of Boundary Value Analysis for an input field that accepts ages from 18 to 60.

Test values would include: 17 (just below min), 18 (min), 19 (just above min), 59 (just below max), 60 (max), and 61 (just above max).

What is the main focus of Boundary Value Analysis?

A Testing only valid inputs

B Testing random inputs

C Testing values at the edges of input ranges

D Testing only invalid inputs

Boundary Value Analysis focuses on testing values at the edges or boundaries of input ranges where errors are most likely.

Which of the following is NOT a typical boundary value to test for an input range?

A Middle value

B Maximum value

C Minimum value

D Just above maximum value

Boundary Value Analysis tests edges like minimum, maximum, and values just outside these boundaries, not the middle value.

If an input accepts values from 1 to 100, which value should NOT be tested in Boundary Value Analysis?

A 101

B 1

C 0

D 50

50 is a middle value, not a boundary value. BVA focuses on edges like 1, 0 (just below min), 100, and 101 (just above max).

How does Boundary Value Analysis help improve test effectiveness?

A By focusing on the most error-prone input values at boundaries

B By ignoring edge cases

C By testing only valid inputs

D By reducing the number of test cases to only one

BVA improves effectiveness by focusing on boundary inputs where errors are more likely to occur.

Which testing technique is often combined with Boundary Value Analysis?

A Performance Testing

B Equivalence Partitioning

C Security Testing

D Usability Testing

Equivalence Partitioning groups inputs, and Boundary Value Analysis tests the edges of those groups.

Explain Boundary Value Analysis and why it is important in software testing.

Think about why testing just the middle values might miss bugs.

Describe how you would select test cases using Boundary Value Analysis for an input accepting numbers from 10 to 50.

Remember to test just outside the allowed range too.