ISTQB Software Testing Quiz 7

1. Which of the following statements about reviews is true?

Reviews cannot be performed on user requirements specifications.

Reviews are the least effective way of testing code.

Reviews are unlikely to find faults in test plans.

Reviews should be performed on specifications, code, and test plans.

The first three answers are wrong because reviews definitely can be performed on documents including user requirements specifications and test plans, and code reviews can be an effective way of testing code.

Explanation

The first three answers are wrong because reviews definitely can be performed on documents including user requirements specifications and test plans, and code reviews can be an effective way of testing code.

2. Enough testing has been performed when:

Time runs out.

The required level of confidence has been achieved.

No more faults are found.

The users won't find any serious faults.

Even though in real life we often end up stopping when time runs out, we should continue until the required level of confidence has been achieved.

Explanation

Even though in real life we often end up stopping when time runs out, we should continue until the required level of confidence has been achieved.

3. What is the main difference between a walkthrough and an inspection?

An inspection is led by the author, whereas a walkthrough is led by a trained moderator.

An inspection has a trained leader, whereas a walkthrough has no leader.

Authors are not present during inspections, whereas they are present during walkthroughs.

A walkthrough is led by the author, whereas an inspection is led by a trained moderator.

A walkthrough is a step-by-step presentation by the author to gain information and to establish common understanding; it is led by the author. An inspection is a peer review led by a moderator.

Explanation

A walkthrough is a step-by-step presentation by the author to gain information and to establish common understanding; it is led by the author. An inspection is a peer review led by a moderator.

4. Static analysis is best described as:

The analysis of batch programs.

The reviewing of test plans.

The analysis of program code.

The use of black box testing.

Static analysis is the analysis of software artifacts, for example, requirements or code. Note that black box testing is testing without reference to the internal structure of the component or system, whereas in static analysis we might actually look through the code (or use a tool to do this).

Explanation

Static analysis is the analysis of software artifacts, for example, requirements or code. Note that black box testing is testing without reference to the internal structure of the component or system, whereas in static analysis we might actually look through the code (or use a tool to do this).

5. A failure is:

Found in the software and is the result of an error.

A departure from specified behaviour.

An incorrect step, process or data definition in a computer program.

A human action that produces an incorrect result.

We need to be careful to distinguish the terms error (or mistake) from defect (or bug or fault) from failure. An error can cause a defect which may result in a failure. Answers A & C are defects, and answer D is an error.

Explanation

We need to be careful to distinguish the terms error (or mistake) from defect (or bug or fault) from failure. An error can cause a defect which may result in a failure. Answers A & C are defects, and answer D is an error.

6. In the Australian tax rates for 2008-09, the first $6,000 are tax free. The next $28,000 are taxed at 15%. The next $46,000 are taxed at 30%. Any further amount is taxed at 40%.

Which of these amounts would fall into the same equivalence class?

$6,800; $44,000; $46,000

$7,000; $7,500; $52,000

$46,001; $57,000; $81,000

$36,000; $46,000; $78,000

The four equivalence classes would be:

$1 to $6,000
$6,001 to $34,000
$34,001 to $80,000
$80,001 +

Clearly, the values in option D all fall into the third equivalence class.

Explanation

The four equivalence classes would be:

$1 to $6,000
$6,001 to $34,000
$34,001 to $80,000
$80,001 +

Clearly, the values in option D all fall into the third equivalence class.