A test team is testing a new chat application. They have limited time and want to discover unexpected defects while also learning the application's behavior. Which approach is most appropriate?

Use a checklist to verify all chat functions

Write detailed test cases for all chat features

Use exploratory testing sessions with charters

Use error guessing to test common input errors

In state transition testing, what does a transition represent?

A list of all possible states in the system

A condition that must be true for the system to start

A test case that verifies a single state

A change from one state to another triggered by an event

A vending machine has states: Idle, Accepting Coins, and Dispensing. A user can insert coins, select a product, and receive the product. The machine returns to Idle after dispensing. Which test case is most effective for verifying the state transition from Accepting Coins to Dispensing?

Select product without inserting a coin

Dispense product without selecting

Insert coin, insert another coin, select product

Insert coin, select product, verify product dispensed

Why is it important to test invalid state transitions?

To ensure that all states are covered

To reduce the number of test cases needed

To verify that the system correctly rejects invalid events

To test the system's performance under load

When is error guessing most effectively used?

Only when there is no specification available

Only for testing user interfaces

As a standalone technique to replace all other test design techniques

When testers have experience with similar systems or past defects

Certified Tester Foundation Level

Domain 4Objective 1

Black-Box Test Techniques CTFL Practice Questions (Page 1)

Part of the Domain 4: Test Analysis and Design domain, which makes up ~13% of our current practice bank. ISTQB does not publish an official question count, but from its 60-minute exam (~25–40 total, ~3–5 in this domain), expect 1–1 from this objective — we provide 24 practice questions to prepare you well beyond it. (estimate)

24questions here

5free pages

7concepts

Questions 1–5

1application · medium
A test team is testing a new chat application. They have limited time and want to discover unexpected defects while also learning the application's behavior. Which approach is most appropriate?
Select an answer first
2foundation · easy
In state transition testing, what does a transition represent?
Select an answer first
3application · medium
A vending machine has states: Idle, Accepting Coins, and Dispensing. A user can insert coins, select a product, and receive the product. The machine returns to Idle after dispensing. Which test case is most effective for verifying the state transition from Accepting Coins to Dispensing?
Select an answer first
4foundation · easy
Why is it important to test invalid state transitions?
Select an answer first
5foundation · easy
When is error guessing most effectively used?
Select an answer first

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