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BCS ISTQB Certified Tester Foundation Level CTFL 4.0 Sample Questions (Q86-Q91):
NEW QUESTION # 86
A system has a self-diagnostics module that starts executing after the system is reset. The diagnostics are running 12 different tests on the systems memory hardware. The following is one of the requirements set for the diagnostics module:
'The time taking the diagnostics tests to execute shall be less than 2 seconds' Which of the following is a failure related to the specified requirement?
- A. The diagnostic tests that measure the speed of the memory, fail
- B. The diagnostic tests fail due to incorrect implementation of the test code
- C. The diagnostic tests take too much time to execute
- D. The diagnostic tests fail to start after a system reset
Answer: C
Explanation:
A failure is an event in which a component or system does not perform a required function within specified limits1. A requirement is a condition or capability needed by a user to solve aproblem or achieve an objective2. In this case, the requirement is that the diagnostics tests should execute in less than 2 seconds.
Therefore, any event that violates this requirement is a failure. The only option that clearly violates this requirement is B. The diagnostic tests take too much time to execute. If the diagnostic tests take more than 2 seconds to complete, then they do not meet the specified limit and thus fail. The other options are not necessarily failures related to the specified requirement. Option A. The diagnostic tests fail to start after a system reset is a failure, but not related to the time limit. It is related to the functionality of the self- diagnostics module. Option C. The diagnostic tests that measure the speed of the memory, fail is also a failure, but not related to the time limit. It is related to the accuracy of the memory tests. Option D. The diagnostic tests fail due to incorrect implementation of the test code is also a failure, but not related to the time limit. It is related to the quality of the test code. References = ISTQB Certified Tester Foundation Level Syllabus v4.0, Requirements Engineering Fundamentals.
NEW QUESTION # 87
During component testing of a program if 100% decision coverage is achieved, which of the following coverage criteria is also guaranteed to be 100%?
- A. 100% Statement coverage
- B. 100% Boundary value coverage
- C. 100% Equivalence class coverage
- D. 100% Stale transition coverage
Answer: A
Explanation:
Statement coverage is a structural coverage metric that measures the percentage of executable statements in the source code that are executed by a test suite1. Decision coverage is another structural coverage metric that measures the percentage of decision outcomes (such as branches or conditions) in the source code that are executed by a test suite1. Decision coverage is a stronger metric than statement coverage, because it requires that every possible outcome of each decision is tested, while statement coverage only requires that every statement is executed at least once2. Therefore, if a test suite achieves 100% decision coverage, it also implies that it achieves 100% statement coverage, because every statement in every branch or condition must have been executed. However, the converse is not true: 100% statement coverage does not guarantee 100% decision coverage, because some branches or conditions may have multiple outcomes that are not tested by the test suite2. For example, consider the following pseudocode:
if (x > 0) then print("Positive") else print("Non-positive") end if
A test suite that executes this code with x = 1 and x = -1 will achieve 100% statement coverage, because both print statements are executed. However, it will not achieve 100% decision coverage, because the condition x > 0 has only been tested with two outcomes: true and false. The third possible outcome, x = 0, has not been tested by the test suite. Therefore, the test suite may miss a potential bug or error in the condition or the branch.
The other options, such as stale transition coverage, equivalence class coverage, and boundary value coverage, are not guaranteed to be 100% by achieving 100% decision coverage. Stale transition coverage is a structural coverage metric that measures the percentage of transitions between states in a state machine that are executed by a test suite3. Equivalence class coverage is a functional coverage metric that measures the percentage of equivalence classes (or partitions) of input or output values that are tested by a test suite4. Boundary value coverage is another functional coverage metric that measures the percentage of boundary values (or extreme values) of input or output ranges that are tested by a test suite4. These metrics are independent of decision coverage, because they are based on different aspects of the system under test, such as its behavior, functionality, or specification. Therefore, achieving 100% decision coverage does not imply achieving 100% of any of these metrics, and vice versa. Reference = ISTQB Certified Tester Foundation Level Syllabus v4.0, Test Coverage in Software Testing - Guru99, Structural Coverage Metrics - MATLAB & Simulink - MathWorks India, Test Design Coverage in Software Testing - GeeksforGeeks.
NEW QUESTION # 88
Match each objective to the correct test level
Objective:
A)Verifying whetherthe functionalandnon-functlonalbehaviorsof the system are as designed andspecified.
B)Verifying whetherthe functionalandnon-functlonalbehaviorsof the interfaces are as designed.
C)Verifying whetherthe functionalandnon-functionalbehaviorsof the components are as designedand specified.
D)Establishing confidence in the quality of the systemas a whole.
Test Level:
1.Component testing.
2.Integration testing.
3.System testing.
4.Acceptance testing.
- A. A3.B2. C1. D4
- B. A3, B2.C4. D1
- C. A2, B3, Cl, D4
Answer: A
Explanation:
The test levels and their objectives can be matched as follows:
* Verifying whether the functional and non-functional behaviors of the system are as designed and specified (A3: System testing).
* Verifying whether the functional and non-functional behaviors of the interfaces are as designed (B2:
Integration testing).
* Verifying whether the functional and non-functional behaviors of the components are as designed and specified (C1: Component testing).
* Establishing confidence in the quality of the system as a whole (D4: Acceptance testing).
NEW QUESTION # 89
The following rules determine the annual bonus to be paid to a salesman of a company based on the total annual amount of the sales made (referred to as TAS).
If the TAS is between 50k€ and 80k€, the bonus is 10%. If the TAS exceeds 80k€ by a value not greater than
40k€, the bonus is 15%. Finally, if the TAS
exceeds the maximum threshold which entitles to a 15% bonus, the bonus is 22%.
Consider applying equivalence partitioning to the TAS (Note: 1k€ = 1000 euros).
Which one of the following answers contain only test cases that belong to the same equivalence partition?
- A. TC1 = 90k€; TC2= 110k€; TC3=125k€: TC4=140k€
- B. TC1 = 40k€; TC2= 46k€; TC3=51k€; TC4=53k€
- C. TC1 = 79k€; TC2= 80k€; TC3=81k€; TC4=82k€
- D. TC1 = 81 k€; TC2= 97k€; TC3=111k€; TC4=118k€
Answer: D
Explanation:
This answer is correct because equivalence partitioning is a test design technique that divides the input domain of a system or component into partitions of equivalent data, such that each partition is expected to produce the same output or behavior. Equivalence partitioning aims to reduce the number of test cases by selecting one representative value from each partition. In this case, the input domain of the TAS can be divided into four partitions based on the bonus rules: less than 50k€, between 50k€ and 80k€, between 80k€ and 120k€, and more than 120k€. The test cases in the answer belong to the same partition, which is between
80k€ and 120k€, and they are expected to produce the same output, which is a bonus of 15%. References:
ISTQB Glossary of Testing Terms v4.0, ISTQB Foundation Level Syllabus v4.0, Section 2.3.2.1
NEW QUESTION # 90
Which ONE of the following options MOST ACCURATELY describesstatement testing?
- A. In statement testing, the coverage items are decisions and statements. The aim is to design test cases that exercise statements in the code until an acceptable level of coverage is achieved, expressed as a percentage.
- B. In statement testing, the coverage items are executable statements. The aim is to design test cases that exercise statements in the code until an acceptable level of coverage is achieved, expressed as a percentage.
- C. In statement testing, the coverage items are branches, and the aim is to design test cases to exercise branches in the code until an acceptable level of coverage is achieved, expressed as a percentage.
- D. In statement testing, the coverage items are control flow transfers between branches. The aim is to design test cases to exercise branches in the code until an acceptable level of coverage is achieved, expressed as a percentage.
Answer: B
Explanation:
Comprehensive and Detailed In-Depth Explanation:Statement testingaims to executeevery executable statementin the source code at least once.
* (D) is correctas statement testing ensuresmaximum statement execution.
* (A) describes branch testing, which focuses on flow transfers.
* (B) and (C) incorrectly mix decision testing and branch testing concepts.
NEW QUESTION # 91
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