CTFL_Syll_4.0 Exam Dumps : ISTQB Certified Tester Foundation Level (CTFL) v4.0

In the given decision table, Column 7 represents the following conditions and actions:

The patient is over 18 years old: True

The patient is allergic to Penicillin: True

The patient is taking anticoagulant therapy: True

When analyzing this column:

If the patient is over 18 years old, allergic to Penicillin, and taking anticoagulant therapy, the decision table suggests consultation with a hematologist and prescribing half of the full recommended dosage for 10 days.

This column does not represent an impossible situation based on the conditions provided. However, upon deeper inspection and understanding of medical practices, it can be argued that such a specificcombination of conditions could be highly unlikely, making it appear unnecessary or an edge case that might be considered for deletion.

Given the constraints of the conditions and the requirements of the decision table, the provided answer needs to be verified against real-world medical guidelines to confirm if this scenario is indeed impossible or just

Comprehensive and Detailed Explanation From Exact Extract:

This is a classic application of theDecision Table Testingtechnique.

We are combining two conditions:

Purchase Volume, which has3 equivalence classes:

1 to 100 units → 0%

101 to 1000 units → 5%

More than 1000 units → 10%

Customer Type, which has2 categories:

Frequent Customer = YES → 5% extra

Frequent Customer = NO → 0%

This gives:

3 (bulk discount levels) × 2 (frequent customer options) = 6 unique decision rules

Each combination of these input conditions defines a separate test scenario with its own outcome.

“Decision table testing is used to identify the different combinations of inputs and their associated outputs. Each unique combination of input values defines a rule.”

(ISTQB CTFL Syllabus v4.0, Section 4.2.3 – Decision Table Testing, Page 40)

Thus,Option D (6 decision rules)is the correct answer.

The question is about marking the correct sentences among the given statements related to defects, failures, and mistakes. According to the ISTQB glossary, the definitions of these terms are1:

Defect: A flaw in a component or system that can cause the component or system to fail to perform its required function, e.g. an incorrect statement or data definition. A defect, if encountered during execution, may cause a failure of the component or system.

Failure: An event in which a component or system does not perform a required function within specified limits.

Mistake: A human action that produces an incorrect result.

Therefore, out of the five given statements, only two are correct, namely:

A human mistake may produce a defect: This is true, as a mistake is a source or cause of a defect, e.g. a programmer may make a mistake in writing a code statement, which results in a defect in the software component.

When a defect exists in a system it may result in a failure: This is true, as a defect is a potential or actual cause of a failure, e.g. a defect in the software component may cause the system to fail to perform a required function when the defect is encountered during execution.

The other three statements are incorrect, namely:

Defects are a result of environmental conditions and are also referred to as “Failures”: This is false, as defects are not a result of environmental conditions, but of mistakes or other factors, and defects are not the same as failures, but rather the causes of failures.

A system will totally fail to operate correctly when a failure exists in it: This is false, as a system may not necessarily fail completely or stop operating when a failure occurs, but may continue to operate with reduced functionality or performance, or with incorrect results.

Defects occur only as a result of technology changes: This is false, as defects can occur due to various reasons, not only technology changes, such as human mistakes, design flaws, requirement changes, hardware failures, etc.