ISTQB Sample Exam Questions – White Box Testing

ISTQB - Sample Exam 2 (White Box Testing)

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This quiz concentrates on questions related to White Box Testing Techniques such as Code Coverage, Branch Coverage, Statement Coverage, Control-Flow, LCSAJ, etc. Start Congratulations - you have completed ISTQB - Sample Exam 2 (White Box Testing). You scored %%SCORE%% out of %%TOTAL%%. Your performance has been rated as %%RATING%%
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Question 1

Which of the following tools would you use to detect a memory leak?

	State analysis
	Memory analysis
	Dynamic analysis
	Coverage analysis

Question 2

Statement Coverage will not check for the following:

	Missing Statements
	Dead Code
	Unused Branches
	Unused Statement

Question 3

Which of the following statements is NOT correct?

	A minimal test set that achieves 100% path coverage will also achieve 100% statement coverage.
	A minimal test set that achieves 100% LCSAJ coverage will also achieve 100% branch coverage.
	A minimal test set that achieves 100% path coverage will generally detect more faults than one that achieves 100% statement coverage.
	A minimal test set that achieves 100% statement coverage will generally detect more faults than one that achieves 100% branch coverage.

Question 4

Given the following code, which statement is true about the minimum number of test cases required for full statement and branch coverage?

Read p
Read q
IF p+q > 100 THEN
Print "Large"
ENDIF
IF p > 50 THEN
Print "p Large"
ENDIF

	1 test for statement coverage, 3 for branch coverage
	2 tests for statement coverage, 2 for branch coverage
	1 test for statement coverage, 1 for branch coverage
	1 test for statement coverage, 2 for branch coverage

Question 5

Which of the following is the odd one out?

	white box
	structural
	glass box
	functional

Question 6

How many test cases are necessary to cover all the possible sequences of statements (paths) for the following program fragment? Assume that the two conditions are independent of each other : -

…………
if (Condition 1)
then statement 1
else statement 2
fi
if (Condition 2)
then statement 3
fi
…………

	Not achievable
	2 Test Cases
	3 Test Cases
	4 Test Cases

Question 7

Incorrect form of Logic coverage is:

	Statement Coverage
	Condition Coverage
	Pole Coverage
	Path Coverage

Question 8

Unreachable code would best be found using:

	a static analysis tool
	code inspections
	a test management tool
	code reviews
	a coverage tool

Question 9

Consider the following statements:

i.            100% statement coverage guarantees 100% branch coverage.
ii.           100% branch coverage guarantees 100% statement coverage.
iii.          100% branch coverage guarantees 100% decision coverage.
iv.          100% decision coverage guarantees 100% branch coverage.
v.           100% statement coverage guarantees 100% decision coverage.

	ii is True; i, iii, iv & v are False
	ii & iii are True; i, iv & v are False
	i & v are True; ii, iii & iv are False
	ii, iii & iv are True; i & v are False

Question 10

Which of the following techniques is NOT a black box technique?

	LCSAJ
	state transition testing
	boundary value analysis
	syntax testing

Question 11

Which of the following is NOT a white box technique?

	Data flow testing
	Statement testing
	Path testing
	State transition testing

Question 12

What can static analysis NOT find?

	unreachable (“dead”) code
	array bound violations
	the use of a variable before it has been defined
	memory leaks

Question 13

Consider the following statements:

i. 100% statement coverage guarantees 100% branch coverage.
ii. 100% branch coverage guarantees 100% statement coverage.
iii. 100% branch coverage guarantees 100% decision coverage.
iv. 100% decision coverage guarantees 100% branch coverage.
v. 100% statement coverage guarantees 100% decision coverage.

ii is True; i, iii, iv & v are False

	ii is True; i, iii, iv & v are False
	ii, iii & iv are True; i & v are False
	ii & iii are True; i, iv & v are False
	i & v are True; ii, iii & iv are False

Question 14

Code Coverage is used as a measure of what ?

	Trends analysis
	Defects
	Test Effectiveness
	Time Spent Testing

Question 15

If the pseudocode below were a programming language ,how many tests are required to achieve 100% statement coverage?

1.            If x=3 then
2.                           Display_messageX;
3.                            If y=2 then
4.                                        Display_messageY;
5.                             Else
6.                                         Display_messageZ;
7.            Else
8.                           Display_messageZ;

	2
	1
	3
	4

Question 16

Analyse the following highly simplified procedure:

Ask: “What type of ticket do you require, single or return?”
IF the customer wants ‘return’
Ask: “What rate, Standard or Cheap-day?”
IF the customer replies ‘Cheap-day’
Say: “That will be £11:20”
ELSE
Say: “That will be £19:50”
ENDIF
ELSE
Say: “That will be £9:75”
ENDIF

Now decide the minimum number of tests that are needed to ensure that all
the questions have been asked, all combinations have occurred and all
replies given.

	5
	4
	6
	3

Question 17

Given the Following program

IF X < Y
THEN Statement 1;
ELSE IF Y >= Z
THEN Statement 2;
END

McCabe’s Cyclomatic Complexity is :

	3
	2
	5
	4

Question 18

	1 test for statement coverage, 1 for branch coverage
	1 test for statement coverage, 2 for branch coverage
	2 tests for statement coverage, 2 for branch coverage
	1 test for statement coverage, 3 for branch coverage

Question 19

An important benefit of code inspections is that they:

	are cheap to perform.
	can be performed by the person who wrote the code.
	enable the code to be tested before the execution environment is ready.
	can be performed by inexperienced staff.

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ISTQB Sample Exam Questions – White Box Testing

ISTQB - Sample Exam 2 (White Box Testing)

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ISTQB Sample Exam Questions – White Box Testing

ISTQB - Sample Exam 2 (White Box Testing)

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