A team is testing a system that uses a database for storage. They need to test how the system handles a database connection failure. The team wants to use a tool that can simulate this failure without modifying the application code. Which tool capability is most important?

The ability to measure the system's memory usage.

The ability to create test data for the database.

The ability to terminate or block database connections.

The ability to generate high CPU load on the system.

In fault injection testing, what does it mean for a system to 'handle a fault gracefully'?

The system ignores the fault and continues as if nothing happened

The system displays an error message and waits for user intervention

The system immediately shuts down to prevent further damage

The system continues to operate with reduced functionality or recovers without crashing

A team is testing a system that controls a medical device. They need to test how the system responds to a failure in the device's communication interface. The team has access to the hardware and can use specialized equipment. Which fault injection technique is most appropriate?

Use a hardware fault injection tool to introduce glitches on the communication lines.

Use a code review tool to identify potential issues in the communication code.

Use a software tool to corrupt data in the application's memory.

Use a network simulator to drop packets on the network.

Which fault injection technique is most commonly used to simulate errors in the communication between software components?

Interface-based fault injection

A company is developing a self-driving car system. The system must be able to handle a failure in the lidar sensor and continue operating safely. The test team has been asked to verify this requirement. Which fault injection approach should they use?

Test the system with a large number of obstacles to see if it can avoid them.

Review the code to identify potential issues in the sensor data processing.

Use a monitoring tool to observe the system's behavior during normal operation.

Simulate a lidar sensor failure and verify that the system degrades gracefully and maintains safety.

Certified Tester Advanced Level Technical Test Analyst

Domain 6Objective 4

Fault Injection Tools CTAL-TTA Practice Questions (Page 5)

Part of the Domain 6: Test Tools and Automation domain, which makes up ~25% of our current practice bank. ISTQB does not publish an official question count, but from its 120-minute exam (~50–80 total, ~13–20 in this domain), expect 1–2 from this objective — we provide 26 practice questions to prepare you well beyond it. (estimate)

26questions here

6free pages

4concepts

Questions 21–25

21application · medium
A team is testing a system that uses a database for storage. They need to test how the system handles a database connection failure. The team wants to use a tool that can simulate this failure without modifying the application code. Which tool capability is most important?
Select an answer first
22foundation · easy
In fault injection testing, what does it mean for a system to 'handle a fault gracefully'?
Select an answer first
23application · medium
A team is testing a system that controls a medical device. They need to test how the system responds to a failure in the device's communication interface. The team has access to the hardware and can use specialized equipment. Which fault injection technique is most appropriate?
Select an answer first
24foundation · easy
Which fault injection technique is most commonly used to simulate errors in the communication between software components?
Select an answer first
25application · medium
A company is developing a self-driving car system. The system must be able to handle a failure in the lidar sensor and continue operating safely. The test team has been asked to verify this requirement. Which fault injection approach should they use?
Select an answer first

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