Stress testing concepts in Testing Fundamentals - Practice Problems & Coding Challenges

Challenge - 5 Problems

🧠 Conceptual

intermediate

Purpose of Stress Testing

What is the main goal of stress testing in software testing?

A To verify if the system meets all functional requirements under normal conditions

B To check how the system behaves under extreme workloads beyond normal operational capacity

C To test the system's user interface for usability issues

D To ensure the system can handle multiple user roles correctly

💡 Hint

Think about testing limits beyond usual usage.

Stress testing focuses on pushing the system beyond its normal limits to see how it behaves under extreme conditions.

❓ Predict Output

intermediate

Stress Test Result Interpretation

Given a stress test script that increases user load until failure, what does a sudden crash at 1500 users indicate?

Testing Fundamentals

max_users = 0
for users in range(100, 2000, 100):
    if system_stress_test(users) == 'fail':
        max_users = users - 100
        break
print(max_users)

A The system can handle up to 1400 users before failing

B The system fails at 1500 users but can handle 1600 users

C The system can handle exactly 1500 users without failure

D The system fails immediately at 100 users

💡 Hint

Look at the loop and when it breaks.

The loop breaks when failure occurs at 1500 users, so the last successful load is 1400 users.

❓ assertion

advanced

Valid Assertion for Stress Test

Which assertion correctly verifies that the system response time stays below 5 seconds under stress?

Testing Fundamentals

response_time = get_response_time_under_load()
# Choose the correct assertion below

A assert response_time < 5, f"Response time too high: {response_time}s"

B assert response_time > 5, f"Response time too low: {response_time}s"

C assert response_time == 5, f"Response time not equal to 5s: {response_time}s"

D assert response_time != 5, f"Response time equals 5s: {response_time}s"

💡 Hint

We want to ensure response time is less than 5 seconds.

Assertion C checks that response time is less than 5 seconds, which is the correct condition.

🔧 Debug

advanced

Identify the Bug in Stress Test Code

What is the bug in the following stress test code snippet?

Testing Fundamentals

def stress_test(system, max_load):
    load = 0
    while load <= max_load:
        result = system.run(load)
        if result == 'fail':
            break
        load += 10
    return load

final_load = stress_test(my_system, 100)
print(final_load)

A The loop increments load by 10 instead of 1, causing inaccurate results

B The break statement is missing, causing an infinite loop

C The function does not handle exceptions from system.run()

D The function returns the load value at failure, not the last successful load

💡 Hint

Check what value is returned when failure occurs.

The function returns the load value where failure happened, but it should return the last successful load (load - 10).

❓ framework

expert

Best Practice for Stress Test Automation Framework

Which feature is MOST important to include in a stress test automation framework to ensure reliable results?

A Detailed UI screenshots for every test step

B Randomized test data generation without constraints

C Automatic recovery and cleanup after each test iteration to reset system state

D Manual intervention prompts during test execution

💡 Hint

Think about maintaining consistent test conditions.

Automatic recovery and cleanup ensure each test starts fresh, avoiding false failures due to leftover state.