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

An ISTQB defined technique for identifying risks when defining a risk-based approach to testing the performance efficiency of a new application is to analyze the requirements to look for areas where performance efficiency requirements have not been well-defined. This technique ensures that testing efforts are focused on areas of the application that are critical for performance but may have insufficient coverage in terms of detailed requirements​​.

A service virtualization tool is used to simulate the behavior of specific components in heterogeneous component-based applications such as APIs, services, and third-party apps that are not readily accessible during development and testing stages. These tools help create stable, controllable, and predictable testing environments by mimicking the interactions with the missing components. This is particularly useful when dealing with server or network traffic log data to develop a shareable testing service that replicates the real systems' behavior without their actual implementations.

In the scenario described, the project involves developing a system to control traffic lights at busy road junctions, focusing on safety-critical operations but deemed low-risk due to the team's high level of expertise.

Option B (4), characterized by ♦ (recommended) for Test Automation and ♦+ (highly recommended) for Exploratory Testing (manual) with ♦ (recommended) for Black-box Testing, is the most fitting for this project because:

Test Automation (Recommended): For a system managing traffic lights, automated tests can efficiently handle repetitive testing of scenarios involving various traffic densities and flow rates, ensuring consistent and thorough checking of system responses under controlled conditions.

Exploratory Testing (Highly Recommended): Given the critical nature of the system, exploratory testing allows testers to creatively challenge the system beyond pre-defined test cases, identifying potential real-world issues that might not be evident in scripted testing. This is particularly vital in safety-critical systems where unexpected behavior could have severe consequences.

Black-box Testing (Recommended): Black-box testing will ensure that the system meets its external specifications and behaves correctly as perceived from the outside, without the testers needing to know the internal workings. This is essential for verifying that the system's functionality aligns with its intended use in real-world traffic scenarios.

This approach, combining thorough automation with exploratory insights and specification-based validation, supports the project's safety-critical nature while leveraging the team’s expertise to manage the identified low risk .