Error guessing in Testing Fundamentals - Practice Problems & Coding Challenges

Challenge - 5 Problems

🧠 Conceptual

intermediate

Identifying Error Guessing Technique Purpose

What is the main goal of the error guessing technique in software testing?

A To design test cases based on the tester's experience to find likely errors

B To automatically generate test cases using a tool

C To test only the user interface elements for errors

D To verify that the software meets all specified requirements

💡 Hint

Think about how testers use their knowledge and intuition.

Error guessing relies on the tester's experience to predict where errors might occur and create test cases accordingly.

❓ Predict Output

intermediate

Output of Error Guessing Test Case Result

Given a function that divides two numbers, a tester uses error guessing to test division by zero. What will be the output when the function is called with (10, 0)?

Testing Fundamentals

def divide(a, b):
    return a / b

result = divide(10, 0)

A Zero

B 10

C Returns None

D Raises ZeroDivisionError

💡 Hint

What happens in Python when you divide by zero?

Dividing by zero in Python raises a ZeroDivisionError exception.

❓ assertion

advanced

Choosing the Correct Assertion for Error Guessing

Which assertion is best to verify that a function raises an error when given invalid input during error guessing?

Testing Fundamentals

def test_invalid_input():
    # Choose the correct assertion here
    pass

A assertRaises(ExpectedError, function, invalid_input)

B assert function(invalid_input) == 'error'

C assert function(invalid_input) is None

D assert function(invalid_input) != valid_output

💡 Hint

Look for the assertion that checks for exceptions.

assertRaises is used to check if a function raises a specific error when called with certain inputs.

🔧 Debug

advanced

Debugging a Failed Error Guessing Test

A tester wrote a test case to check for null input handling but the test passes even when the function crashes. What is the likely cause?

A The function handles null input correctly

B The function never receives null input

C The test case does not catch the exception properly

D The test case uses the wrong input value

💡 Hint

Consider how exceptions are handled in tests.

If the test does not catch exceptions, the test framework may mark the test as failed incorrectly.

❓ framework

expert

Integrating Error Guessing in Automated Testing Framework

How can error guessing be effectively integrated into an automated testing framework?

A By relying only on random test data generation without human input

B By adding test cases based on common error patterns and past bugs into the test suite

C By removing all manual test cases and using only automated scripts

D By testing only the happy path scenarios automatically

💡 Hint

Think about combining human knowledge with automation.

Error guessing works best when testers add their experience-based test cases into automated suites to catch common errors.