CTAL-TTA Exam Dumps : Certified Tester Advanced Level Technical Test Analyst

To achieve 100% decision coverage, we need to ensure that every decision (if statement) in the code has been tested for both true and false outcomes. Let's analyze the code and count the decisions:

IF (Room_price > 200)

IF (Loyalty_level = Platinum) inside Room_price > 200

ELSE within the same decision above

IF (Loyalty_level = Gold) inside the ELSE of decision 2

IF (Room_price > 150)

IF (Loyalty_level = Platinum) inside Room_price > 150

ELSE within the same decision above

IF (Discount_factor < 100%)

To cover all these decisions, we need test cases for each possible combination:

Room_price > 200 and Loyalty_level = Platinum.

Room_price > 200 and Loyalty_level = Gold.

Room_price > 200 and Loyalty_level not Platinum or Gold.

Room_price <= 200 and Room_price > 150, and Loyalty_level = Platinum.

Room_price <= 200 and Room_price > 150, and Loyalty_level not Platinum.

Room_price <= 150.

From these scenarios, we can see that the minimum number of test cases required to achieve 100% decision coverage is four:

Test with Room_price > 200 and Loyalty_level = Platinum (tests decision 1 true, 2 true, and 8 true).

Test with Room_price > 200 and Loyalty_level = Gold (tests decision 1 true, 2 false, 4 true, and 8 true).

Test with Room_price > 200 and Loyalty_level not Platinum or Gold (tests decision 1 true, 2 false, 4 false, and 8 true).

Test with Room_price <= 200 and Room_price > 150, and Loyalty_level = Platinum (tests decision 1 false, 5 true, 6 true, and 8 true).

Test with Room_price <= 200 and Room_price > 150, and Loyalty_level not Platinum (tests decision 1 false, 5 true, 6 false, and 8 true).

Test with Room_price <= 150 (tests decision 1 false, 5 false, and 8 false).

Given that these six cases test all branches, four test cases are required to ensure that all decisions are covered at least once.

Therefore, the correct answer is A. 4.

Analysis:

Compatibility testing is essential for applications that are designed to work across various hardware and software environments, particularly for mobile devices which can have diverse specifications and operating systems.

C. To evaluate the degree to which it can effectively and efficiently be adapted for different or evolving hardware environments:

This option addresses the core purpose of compatibility testing for a mobile application. It ensures that the application works as intended across different mobile devices and operating systems, which is crucial for public transport applications that must function reliably on various devices used by the public.

Explanation of Incorrect Options:

A. To evaluate the degree to which it is operational and accessible when required for use:

This is more related to availability and reliability rather than compatibility.

B. To evaluate the degree to which its functions facilitate the accomplishment of specified tasks and objectives:

This pertains to functionality testing, not compatibility.

D. To evaluate the degree to which the system is operational and accessible when required for use:

This duplicates option A and is not directly related to compatibility.

References:

The ISTQB CTAL-TTA syllabus covers compatibility testing and its relevance in ensuring applications function correctly across different environments and hardware configurations.

Sources:

ISTQB-CTAL-TTA Syllabus

General knowledge on compatibility testing practices.

Service virtualization is used in test environments to simulate the behaviors, data, and performance characteristics of dependent systems that are not available for testing due to limitations such as cost, access, or complexity. This allows for more thorough testing of the product under test in a controlled, stable environment that mimics real-world conditions without the need for actual live systems .