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ISTQB-CTFL Exam Dumps : ISTQB Certified Tester Foundation Level (CTFL v4.0)

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ISTQB Certified Tester Foundation Level (CTFL v4.0) Questions and Answers

Question 1

Select which of the following statements describe the key principles of software testing?

i. Testing shows the presence of defects, not their absence.

ii. Testing everything Is possible.

iii. Early testing Is more expensive and is a waste of time.

iv. Defects cluster together.

v. Testing is context dependent.

vi. Beware of the pesticide paradox.

vii. Absence of errors is a fallacy.

Select the correct answer:

Options:

A.

i, iv, v, vi and vii

B.

I, ii, v. vi and vii

C.

iii. iv, v. vi and vii

D.

ii, iii, iv, v and vi

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Question 2

Which of the following BEST defines risk level?

Options:

A.

Risk level is determined by calculating the absolute value of the sum of all potential issues that may occur on the project

B.

Risk level is calculated by adding the probabilities of all planned risks to a project

C.

Risk level is calculated by dividing the sum of all known risks by the sum of all unknown risks

D.

Risk level is determined by the likelihood of an event happening and the impact or harm from that event

Question 3

Following a risk-based testing approach you have designed 10 tests to cover a product risk with a high-risk level. You want to estimate, adopting the three-point test estimation technique, the test effort required to reduce the risk level to zero by executing those 10 tests. You made the following three initial estimates:

• most optimistic = 6 person hours

• most likely = 30 person hours

• most pessimistic = 54 person hours

Based only on the given information, which of the following answers about the three-point test estimation technique applied to this problem is true?

Options:

A.

The final estimate is between 22 person hours and 38 person hours

B.

The final estimate is exactly 30 person hours because the technique uses the initial most likely estimate as the final estimate

C.

The final estimate is between 6 person hours and 54 person hours

D.

The final estimate is exactly 30 person hours because the technique uses the arithmetic mean of the three initial estimates as the final estimate