Code review as testing in Testing Fundamentals - Practice Problems & Coding Challenges

Challenge - 5 Problems

🧠 Conceptual

intermediate

Purpose of Code Review in Testing

What is the main purpose of performing a code review as part of software testing?

A To rewrite the code in a different programming language

B To increase the code size for better performance

C To find and fix bugs before the code runs in production

D To remove all comments and documentation from the code

💡 Hint

Think about how code review helps catch problems early.

Code review helps testers and developers find bugs and issues in the code before it is deployed, improving software quality.

❓ assertion

intermediate

Identifying a Good Assertion in Code Review

Which assertion best checks that a function returns the expected output during a code review?

Testing Fundamentals

def add(a, b):
    return a + b

result = add(2, 3)
# Which assertion is correct to verify the result?

A assert result == '5'

B assert result == 5

C assert result > 10

D assert result != 5

💡 Hint

Check what the function is supposed to return for inputs 2 and 3.

The function adds two numbers, so 2 + 3 equals 5. The assertion should check for equality with 5.

🔧 Debug

advanced

Finding the Bug in Code Snippet

During code review, you find this Python function. What error will it cause when called?

Testing Fundamentals

def divide(x, y):
    return x / y

result = divide(10, 0)

A No error, returns 0

B TypeError

C NameError

D ZeroDivisionError

💡 Hint

What happens when you divide a number by zero in Python?

Dividing by zero in Python raises a ZeroDivisionError at runtime.

❓ framework

advanced

Best Practice for Code Review in Testing Frameworks

Which practice is best when reviewing test code in an automated testing framework?

A Check that test cases have clear, descriptive names and cover edge cases

B Ignore test case names and focus only on code length

C Remove all comments to make tests shorter

D Write tests that depend on external systems without mocks

💡 Hint

Think about what makes tests easy to understand and reliable.

Good test code should have clear names and cover important cases, making it easier to maintain and trust.

❓ Predict Output

expert

Output of Code Review Scenario with Assertion

What is the output when running this test code snippet?

Testing Fundamentals

def is_even(n):
    return n % 2 == 0

assert is_even(7) == True

A AssertionError

B True

C False

D SyntaxError

💡 Hint

Check if 7 is even and what the assertion expects.

7 is not even, so is_even(7) returns False. The assertion expects True, so it fails with AssertionError.