Testing levels (unit, integration, system, acceptance) in Software Engineering - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the sentence to define unit testing.

Software Engineering

Unit testing focuses on testing [1] components of software individually.

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

Alarge

Bsmall

Cexternal

Dintegrated

Attempts:

3 left

💡 Hint

Common Mistakes

Confusing unit testing with testing the whole system.

Unit testing checks small parts of the software, like individual functions or methods, to ensure they work correctly on their own.

2fill in blank

medium

Complete the sentence to describe integration testing.

Software Engineering

Integration testing checks how [1] parts of the software work together.

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

Aunrelated

Bisolated

Ccombined

Dexternal

Attempts:

3 left

💡 Hint

Common Mistakes

Thinking integration testing tests parts separately.

Integration testing verifies that different parts or modules of the software interact correctly when combined.

3fill in blank

hard

Fix the error in the sentence about system testing.

Software Engineering

System testing evaluates the [1] software as a whole to ensure it meets requirements.

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

Acomplete

Bpartial

Cindividual

Dunrelated

Attempts:

3 left

💡 Hint

Common Mistakes

Confusing system testing with unit or integration testing.

System testing tests the complete and integrated software to check if it meets the specified requirements.

4fill in blank

hard

Fill both blanks to describe acceptance testing.

Software Engineering

Acceptance testing is done by [1] to check if the software meets [2] needs.

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

Ausers

Bdevelopers

Cbusiness

Dtechnical

Attempts:

3 left

💡 Hint

Common Mistakes

Thinking developers perform acceptance testing.

Acceptance testing is performed by users or customers to verify the software meets their business needs and requirements.

5fill in blank

hard

Fill all three blanks to complete the testing levels sequence.

Software Engineering

The testing levels in order are: [1], [2], [3], and acceptance testing.

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

Aunit testing

Bsystem testing

Cintegration testing

Dregression testing

Attempts:

3 left

💡 Hint

Common Mistakes

Mixing up the order of integration and system testing.

The common order of testing levels is unit testing first, then integration testing, followed by system testing, and finally acceptance testing.

Practice

1. Which testing level focuses on verifying the smallest parts of software, like individual functions or methods?

easy

A. Acceptance testing

B. Integration testing

C. System testing

D. Unit testing

Solution

1. Step 1: Understand the scope of unit testing

   Unit testing checks the smallest parts of software, such as individual functions or methods, to ensure they work correctly on their own.

2. Step 2: Compare with other testing levels

   Integration testing checks combined parts, system testing checks the whole system, and acceptance testing checks if the software meets user needs.

3. Final Answer:

   Unit testing -> Option D

4. Quick Check:

   Smallest parts tested = Unit testing [OK]

Hint: Smallest parts tested? Think unit tests first. [OK]

Common Mistakes:

• Confusing unit testing with integration testing
• Thinking system testing tests small parts
• Mixing acceptance testing with unit testing

2. Which of the following is the correct order of testing levels from smallest scope to largest scope?

easy

A. Unit, Integration, System, Acceptance

B. System, Unit, Acceptance, Integration

C. Acceptance, System, Integration, Unit

D. Integration, Unit, Acceptance, System

Solution

1. Step 1: Identify the scope of each testing level

   Unit tests check smallest parts, integration tests check combined parts, system tests check the whole system, and acceptance tests check user satisfaction.

2. Step 2: Arrange from smallest to largest scope

   The correct order is Unit, Integration, System, Acceptance.

3. Final Answer:

   Unit, Integration, System, Acceptance -> Option A

4. Quick Check:

   Smallest to largest = Unit -> Integration -> System -> Acceptance [OK]

Hint: Remember: Unit first, then Integration, System, Acceptance last. [OK]

Common Mistakes:

• Mixing up acceptance and system testing order
• Reversing unit and integration testing
• Assuming acceptance testing is first

3. Consider a software project where a developer writes tests to check if two modules work correctly together. Which testing level is this?

medium

A. Unit testing

B. System testing

C. Integration testing

D. Acceptance testing

Solution

1. Step 1: Understand the scenario of testing two modules together

   Testing if two modules work correctly together means checking their interaction, which is the focus of integration testing.

2. Step 2: Differentiate from other testing levels

   Unit testing checks single modules alone, system testing checks the entire software, and acceptance testing checks user requirements.

3. Final Answer:

   Integration testing -> Option C

4. Quick Check:

   Testing combined parts = Integration testing [OK]

Hint: Testing combined modules? Think integration testing. [OK]

Common Mistakes:

• Confusing unit testing with integration testing
• Thinking system testing means module pairs
• Assuming acceptance testing covers module interaction

4. A tester runs tests that check if the entire software system meets the specified requirements but notices some tests fail due to missing user feedback. What testing level is likely missing or incomplete?

medium

A. Integration testing

B. Acceptance testing

C. System testing

D. Unit testing

Solution

1. Step 1: Analyze the problem context

   The tests check if the whole system meets requirements but fail due to missing user feedback, indicating user acceptance is not confirmed.

2. Step 2: Identify the testing level related to user satisfaction

   Acceptance testing confirms if the software meets user needs and expectations, so missing this causes the issue.

3. Final Answer:

   Acceptance testing -> Option B

4. Quick Check:

   User feedback missing = Acceptance testing incomplete [OK]

Hint: Missing user feedback? Check acceptance testing. [OK]

Common Mistakes:

• Confusing system testing with acceptance testing
• Assuming unit testing covers user needs
• Ignoring the role of acceptance tests

5. A company wants to ensure their new app works correctly at every level before release. They start by testing individual functions, then test how modules work together, next test the full app, and finally get users to approve it. Which sequence of testing levels are they following?

hard

A. Unit, Integration, System, Acceptance

B. Integration, Unit, Acceptance, System

C. Acceptance, System, Integration, Unit

D. System, Unit, Acceptance, Integration

Solution

1. Step 1: Match each testing step to its level

   Testing individual functions is Unit testing; testing modules together is Integration testing; testing the full app is System testing; user approval is Acceptance testing.

2. Step 2: Arrange the sequence in correct order

   The sequence is Unit, Integration, System, Acceptance.

3. Final Answer:

   Unit, Integration, System, Acceptance -> Option A

4. Quick Check:

   Stepwise testing = Unit -> Integration -> System -> Acceptance [OK]

Hint: Follow smallest to largest testing: Unit -> Integration -> System -> Acceptance. [OK]

Common Mistakes:

• Mixing order of testing levels
• Confusing acceptance with system testing
• Skipping integration testing step