Risk-based testing in Testing Fundamentals - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to define the main goal of risk-based testing.

Testing Fundamentals

risk_based_testing_goal = "Focus testing on areas with [1] risk"

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

Aaverage

Bhighest

Clowest

Dunknown

Attempts:

3 left

💡 Hint

Common Mistakes

Choosing 'lowest' risk which misses critical problems.

Confusing risk with unknown areas.

The main goal of risk-based testing is to focus testing efforts on the areas with the highest risk to catch critical issues early.

2fill in blank

medium

Complete the code to calculate risk as a product of impact and likelihood.

Testing Fundamentals

risk = impact [1] likelihood

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

A*

B/

C-

D+

Attempts:

3 left

💡 Hint

Common Mistakes

Adding impact and likelihood instead of multiplying.

Dividing impact by likelihood which does not represent risk.

Risk is commonly calculated by multiplying impact and likelihood to prioritize testing.

3fill in blank

hard

Fix the error in the code that selects test cases based on risk threshold.

Testing Fundamentals

selected_tests = [test for test in tests if test.risk [1] 5]

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

A<

B=

C===

D>

Attempts:

3 left

💡 Hint

Common Mistakes

Using '=' which is assignment, not comparison.

Using '==' which checks equality, not greater than.

We select tests with risk greater than 5 to focus on higher risk areas.

4fill in blank

hard

Fill both blanks to create a dictionary of test cases with risk above threshold and their impact.

Testing Fundamentals

high_risk_tests = {test.name: test.[1] for test in tests if test.[2] > 7}

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

Aimpact

Blikelihood

Crisk

Dpriority

Attempts:

3 left

💡 Hint

Common Mistakes

Using likelihood instead of impact for values.

Filtering by impact instead of risk.

The dictionary maps test names to their impact for tests with risk greater than 7.

5fill in blank

hard

Fill all three blanks to create a list of test names with risk above 6 and likelihood above 3.

Testing Fundamentals

selected = [test.[1] for test in tests if test.[2] > 6 and test.[3] > 3]

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

Aname

Brisk

Clikelihood

Dimpact

Attempts:

3 left

💡 Hint

Common Mistakes

Using impact instead of likelihood in the condition.

Selecting risk instead of name in the output.

This list comprehension selects test names where risk is above 6 and likelihood is above 3.

Practice

1. What is the main goal of risk-based testing in software testing?

easy

A. To avoid testing parts that are easy to test

B. To test all parts of the software equally

C. To focus testing on the most important and risky parts first

D. To test only the user interface

Solution

1. Step 1: Understand the purpose of risk-based testing

   Risk-based testing aims to prioritize testing efforts on areas with the highest risk to save time and improve effectiveness.

2. Step 2: Compare options with this purpose

   To focus testing on the most important and risky parts first matches this goal by focusing on important and risky parts first, while others do not.

3. Final Answer:

   To focus testing on the most important and risky parts first -> Option C

4. Quick Check:

   Risk-based testing = Focus on risky parts first [OK]

Hint: Risk-based testing targets risky parts first [OK]

Common Mistakes:

• Thinking all parts are tested equally
• Believing risk-based testing ignores important parts
• Confusing risk-based testing with UI-only testing

2. Which of the following is the correct way to prioritize tests in risk-based testing?

easy

A. By combining the impact and likelihood of potential problems

B. By testing the easiest features first

C. By testing features in alphabetical order

D. By testing only the newest features

Solution

1. Step 1: Recall how risk is calculated in testing

   Risk is usually calculated by combining the impact of a problem and how likely it is to happen.

2. Step 2: Match this with the options

   By combining the impact and likelihood of potential problems correctly states this combination, while others focus on unrelated criteria.

3. Final Answer:

   By combining the impact and likelihood of potential problems -> Option A

4. Quick Check:

   Risk = Impact x Likelihood [OK]

Hint: Prioritize tests by impact and likelihood [OK]

Common Mistakes:

• Prioritizing by ease or alphabetical order
• Ignoring likelihood of problems
• Testing only new features without risk analysis

3. Consider this simplified risk table for features:

Feature A: Impact=5, Likelihood=4
Feature B: Impact=3, Likelihood=6
Feature C: Impact=4, Likelihood=2

Which feature should be tested first based on risk?

medium

A. Feature B

B. Feature A

C. Feature C

D. All features equally

Solution

1. Step 1: Calculate risk for each feature

   Risk = Impact x Likelihood.
   Feature A: 5 x 4 = 20
   Feature B: 3 x 6 = 18
   Feature C: 4 x 2 = 8

2. Step 2: Identify highest risk

   Feature A has the highest risk score (20), so it should be tested first.

3. Final Answer:

   Feature A -> Option B

4. Quick Check:

   Highest risk = Feature A (20) [OK]

Hint: Multiply impact and likelihood to find highest risk [OK]

Common Mistakes:

• Choosing feature with highest likelihood only
• Ignoring impact in calculation
• Testing all features equally without prioritization

4. A tester wrote this pseudocode to select features to test based on risk:

features = [{"name": "A", "impact": 5, "likelihood": 4},
            {"name": "B", "impact": 3, "likelihood": 6}]

for feature in features:
    risk = feature["impact"] + feature["likelihood"]
    if risk > 8:
        print(feature["name"])

What is wrong with this code for risk-based testing?

medium

A. Risk should be calculated by multiplying impact and likelihood, not adding

B. The loop should use feature.name instead of feature["name"]

C. The risk threshold should be less than 8, not greater

D. The features list should be sorted before looping

Solution

1. Step 1: Review risk calculation method

   Risk-based testing calculates risk by multiplying impact and likelihood, not adding them.

2. Step 2: Identify error in code

   The code adds impact and likelihood, which is incorrect for risk calculation.

3. Final Answer:

   Risk should be calculated by multiplying impact and likelihood, not adding -> Option A

4. Quick Check:

   Risk = Impact x Likelihood, not sum [OK]

Hint: Risk = impact x likelihood, not sum [OK]

Common Mistakes:

• Adding instead of multiplying impact and likelihood
• Confusing dictionary access syntax
• Assuming sorting is required before risk check

5. You have three features with these risk scores:

Feature X: 12
Feature Y: 20
Feature Z: 20

Due to limited time, you can only test two features. Which is the best risk-based testing approach?

hard

A. Test Feature X and Feature Y because X has the lowest risk

B. Test all three features equally

C. Test Feature X and Feature Z because Z is newer

D. Test Feature Y and Feature Z because they have the highest risk

Solution

1. Step 1: Identify features with highest risk

   Feature Y and Feature Z both have the highest risk score of 20.

2. Step 2: Prioritize testing based on risk and time limit

   Since only two can be tested, choose the two with highest risk to maximize risk coverage.

3. Final Answer:

   Test Feature Y and Feature Z because they have the highest risk -> Option D

4. Quick Check:

   Test highest risk features first [OK]

Hint: Pick features with highest risk scores first [OK]

Common Mistakes:

• Testing lower risk features first
• Ignoring risk scores when time is limited
• Trying to test all features equally despite limits