BCS CTFL4 ISTQB Certified Tester Foundation Level CTFL 4.0 Exam Online Training

Question #1

The tests at the bottom layer of the test pyramid:

A . run faster than the tests at the top layer of the pyramid
B . cover larger pieces of functionalities than the tests at the top layer of the pyramid
C . are defined as ‘Ul Tests’ or ‘End-To-End tests’ in the different models of the pyramid
D . are unscripted tests produced by experience-based test techniques

Reveal Solution Hide Solution

Question #2

Test automation allows you to:

A . demonstrate the absence of defects
B . produce tests that are less subject to human errors
C . avoid performing exploratory testing
D . increase test process efficiency by facilitating management of defects

Reveal Solution Hide Solution

Question #3

Which of the following statements about how different types of test tools support testers is true?

A . The support offered by a test data preparation tool is often leveraged by testers to run automated regression test suites
B . The support offered by a performance testing tool is often leveraged by testers to run load tests
C . The support offered by a bug prediction tool is often used by testers to track the bugs they found
D . The support offered by a continuous integration tool is often leveraged by testers to automatically generate test cases from a model

Reveal Solution Hide Solution

Correct Answer: B
B

Explanation:

The support offered by a performance testing tool is often leveraged by testers to run load tests, which are tests that simulate a large number of concurrent users or transactions on the system under test, in order to measure its performance, reliability, and scalability. Performance testing tools can help testers to generate realistic workloads, monitor system behavior, collect and analyze performance metrics, and identify performance bottlenecks.

The other statements are false, because:

A test data preparation tool is a tool that helps testers to create, manage, and manipulate test data, which are the inputs and outputs of test cases. Test data preparation tools are not directly related to running automated regression test suites, which are test suites that verify that the system still works as expected after changes or modifications. Regression test suites are usually executed by test execution tools, which are tools that can automatically run test cases and compare actual results with expected results.

A bug prediction tool is a tool that uses machine learning or statistical techniques to predict the likelihood of defects in a software system, based on various factors such as code complexity, code churn, code coverage, code smells, etc. Bug prediction tools are not used by testers to track the bugs they found, which are the actual defects that have been detected and reported during testing. Bugs are usually tracked by defect management tools, which are tools that help testers to record, monitor, analyze, and resolve defects.

A continuous integration tool is a tool that enables the integration of code changes from multiple

developers into a shared repository, and the execution of automated builds and tests, in order to ensure the quality and consistency of the software system. Continuous integration tools are not used by testers to automatically generate test cases from a model, which are test cases that are derived from a representation of the system under test, such as a state diagram, a decision table, a use case, etc. Test cases can be automatically generated by test design tools, which are tools that support the implementation and maintenance of test cases, based on test design specifications or test models.

Reference: ISTQB Certified Tester Foundation Level (CTFL) v4.0 sources and documents: ISTQB® Certified Tester Foundation Level Syllabus v4.0, Chapter 3.4.1, Types of Test Tools

ISTQB® Glossary of Testing Terms v4.0, Performance Testing Tool, Test Data Preparation Tool, Bug Prediction Tool, Continuous Integration Tool, Test Execution Tool, Defect Management Tool, Test Design Tool

Question #4

Which of the following statements about branch coverage is true?

A . The minimum number of test cases needed to achieve full branch coverage, is usually lower than that needed to achieve full statement coverage
B . If full branch coverage has been achieved, then all unconditional branches within the code have surely been exercised
C . If full branch coverage has been achieved, then all combinations of conditions in a decision table have surely been exercised
D . Exercising at least one of the decision outcomes for all decisions within the code, ensures achieving full branch coverage

Reveal Solution Hide Solution

Correct Answer: D
D

Explanation:

Exercising at least one of the decision outcomes for all decisions within the code, ensures achieving full branch coverage, which is a test coverage criterion that requires that all branches in the control flow of the code are executed at least once by the test cases. A branch is a basic block of code that has a single entry point and a single exit point, and a decision is a point in the code where the control flow can take more than one direction, such as an if-then-else statement, a switch-case statement, a loop statement, etc. The decision outcomes are the possible paths that can be taken from a decision, such as the then branch or the else branch, the case branch or the default branch, the loop body or the loop exit, etc. The other statements are false, because:

The minimum number of test cases needed to achieve full branch coverage, is usually higher than that needed to achieve full statement coverage, which is a test coverage criterion that requires that all executable statements in the code are executed at least once by the test cases. This is because branch coverage is a stronger criterion than statement coverage, as it implies statement coverage, but not vice versa. For example, a single test case can achieve full statement coverage for an if-then-else statement, but two test cases are needed to achieve full branch coverage, as both the then branch and the else branch need to be exercised.

If full branch coverage has been achieved, then all unconditional branches within the code have not necessarily been exercised, as unconditional branches are branches that do not depend on any decision, and are always executed, such as a goto statement, a break statement, a return statement, etc. Unconditional branches are not part of the branch coverage criterion, as they do not represent different paths in the control flow of the code. However, they are part of the statement coverage criterion, as they are executable statements in the code.

If full branch coverage has been achieved, then all combinations of conditions in a decision table have not necessarily been exercised, as a decision table is a test design technique that represents the logical relationships between multiple conditions and their corresponding actions, in a tabular format. A decision table can have more combinations of conditions than the number of decision outcomes in the code, as each condition can have two or more possible values, such as true or false, yes or no, etc. For example, a decision table with four conditions can have 16 combinations of conditions, but the corresponding code may have only two decision outcomes, such as pass or fail. To exercise all combinations of conditions in a decision table, a stronger test coverage criterion is needed, such as condition combination coverage, which requires that all possible combinations of condition outcomes in the code are executed at least once by the test cases.

Reference: ISTQB Certified Tester Foundation Level (CTFL) v4.0 sources and documents:

ISTQB® Certified Tester Foundation Level Syllabus v4.0, Chapter 2.3.1, Test Coverage Criteria Based on the Structure of the Software

ISTQB® Glossary of Testing Terms v4.0, Branch Coverage, Statement Coverage, Branch, Decision, Decision Outcome, Unconditional Branch, Decision Table, Condition Combination Coverage

Question #5

Consider the following simplified version of a state transition diagram that specifies the behavior of a video poker game:

What Is the minimum number of test cases needed to cover every unique sequence of up to 3 states/2 transitions starting In the "Start" state and ending In the "End" state?

A . 1
B . 2
C . 3
D . 4

Reveal Solution Hide Solution

Question #6

Consider a given test plan which, among others, contains the following three sections: "Test Scope", "Testing Communication", and "Stakeholders".

The features of the test object to be tested and those excluded from the testing represent information that is:

A . not usually included in a test plan, and therefore in the given test plan it should not be specified neither within the three sections mentioned, nor within the others
B . usually included in a test plan and, in the given test plan, it is more likely to be specified within "Test Scope" rather than in the other two sections mentioned
C . usually included in a test plan and, in the given test plan, it is more likely to be specified within "Testing Communication" rather than in the other two sections mentioned
D . usually included in a test plan and, in the given test plan, it is more likely to be specified within "Stakeholders" rather than in the other two sections mentioned

Reveal Solution Hide Solution

Question #7

An alphanumeric password must be between 4 and 7 characters long and must contain at least one numeric character, one capital (uppercase) letter and one lowercase letter of the alphabet.

Which one of the following sets of test cases represents the correct outcome of a two-value boundary value analysis applied to the password length? (Note: test cases are separated by a semicolon)

A . 1xA;aB11;Pq1ZZab;7iDD0a1x
B . aB11;99rSp:5NnN10;7iDD0a1x
C . 1xB: aB11: 99rSp: 5NnN10; 4NnN10T; 44ghWn19
D . 1RhT;rSp53;3N3e10;8sBdby

Reveal Solution Hide Solution

Question #8

A company wants to reward each of its salespeople with an annual bonus that represents the sum of all the bonuses accumulated for every single sale made by that salesperson. The bonus for a single sale can take on the following four values: 3%, 5%, 7% and 10% (the percentage refers to the amount of the single sale). These values are determined on the basis of the type of customer (classified as "Basic" or "Premium") to which such sale was made, and on the amount of such sale classified into the following three groups G1, G2 and G3:

• [G1]: less than 300 euros

• [G2]: between 300 and 2000 euros

• [G3]: greater than 2000 euros

Which of the following is the minimum number of test cases needed to cover the full decision table associated with this scenario?

A . 12
B . 6
C . 4
D . 3

Reveal Solution Hide Solution

Question #9

Which of the following statements is true?

A . Experience-based test techniques rely on the experience of testers to identify the root causes of defects found by black-box test techniques
B . Some of the most common test basis used by white-box test techniques include user stories, use cases and business processes
C . Experience-based test techniques are often useful to detect hidden defects that have not been targeted by black-box test techniques
D . The primary goal of experience-based test techniques is to design test cases that can be easily automated using a GUI-based test automation tool

Reveal Solution Hide Solution

Correct Answer: C
C

Explanation:

Experience-based test techniques are test design techniques that rely on the experience, knowledge, intuition, and creativity of the testers to identify and execute test cases that are likely to find defects in the software system. Experience-based test techniques are often useful to detect hidden defects that have not been targeted by black-box test techniques, which are test design techniques that use the external behavior and specifications of the software system as the test basis, without considering its internal structure or implementation. Experience-based test techniques can complement black-box test techniques by covering aspects that are not explicitly specified, such as usability, security, reliability, performance, etc.

The other statements are false, because:

Experience-based test techniques do not rely on the experience of testers to identify the root causes of defects found by black-box test techniques, but rather to identify the potential sources of defects based on their own insights, heuristics, or exploratory testing. The root causes of defects are usually identified by debugging or root cause analysis, which are activities that involve examining the code or the development process to find and fix the errors that led to the defects.

Some of the most common test basis used by white-box test techniques include the source code, the design documents, the architecture diagrams, and the control flow graphs of the software system. White-box test techniques are test design techniques that use the internal structure and implementation of the software system as the test basis, and aim to achieve a certain level of test coverage based on the code elements, such as statements, branches, paths, etc. User stories, use cases, and business processes are examples of test basis used by black-box test techniques, as they describe the functional and non-functional requirements of the software system from the perspective of the users or the stakeholders.

The primary goal of experience-based test techniques is not to design test cases that can be easily automated using a GUI-based test automation tool, but rather to design test cases that can reveal defects that are not easily detected by other test techniques, such as boundary value analysis, equivalence partitioning, state transition testing, etc. Test automation is the use of software tools to execute test cases and compare actual results with expected results, without human intervention. Test automation can be applied to different types of test techniques, depending on the test objectives, the test levels, the test tools, and the test resources. However, test automation is not always feasible or beneficial, especially for test cases that require human judgment, creativity, or exploration, such as those designed by experience-based test techniques.

Reference: ISTQB Certified

Tester Foundation Level (CTFL) v4.0 sources and documents:

ISTQB® Certified Tester Foundation Level Syllabus v4.0, Chapter 2.2.1, Black-box Test Design Techniques

ISTQB® Certified Tester Foundation Level Syllabus v4.0, Chapter 2.2.2, White-box Test Design Techniques

ISTQB® Certified Tester Foundation Level Syllabus v4.0, Chapter 2.2.3, Experience-based Test Design Techniques

ISTQB® Glossary of Testing Terms v4.0, Experience-based Test Technique, Black-box Test Technique, White-box Test Technique, Test Basis, Test Coverage, Test Automation

Question #10

A new web app aims at offering a rich user experience. As a functional tester, you have run some functional tests to verify that, before releasing the app, such app works correctly on several mobile devices, all of which are listed as supported devices within the requirements specification. These tests were performed on stable and isolated test environments where you were the only user interacting with the application. All tests passed, but in some of those tests you observed the following issue: on some mobile devices only, the response time for two web pages containing images was extremely slow.

Based only on the given information, which of the following recommendation would you follow?

A . You should open a defect report providing detailed information on which devices and by running which tests you observed the issue
B . The issue is related to performance efficiency, not functionality. Thus, as a functional tester, you should not open any defect report as all the functional tests passed
C . You should not open any defect report as the problem is most likely due to poor hardware equipment on the devices where you observed the issue
D . You should not open any defect report and inform the test manager that the devices on which you observed the issue should no longer be supported so that they will be removed from the requirements specification

Reveal Solution Hide Solution

BCS CTFL4 ISTQB Certified Tester Foundation Level CTFL 4.0 Exam Online Training