CTFL-AcT Exam Dumps : ISTQB Certified Tester - Acceptance Testing (CT-AcT)

Collaboration between business analysts and testers is critical in Agile and acceptance testing environments. One of the most effective areas of cooperation is the joint development and review of acceptance criteria for user stories. This ensures that criteria are testable, clearly defined, and aligned with stakeholder expectations.

Option B is correct because creating acceptance criteria is where both business analysts (who understand the business needs) and testers (who ensure testability and clarity) contribute effectively.

Other options:

A (Business needs assessment) is typically a responsibility of business analysts, not a joint activity with testers.

C (Review of risk to prioritize acceptance tests) is a valuable activity but comes after criteria are defined. While it can be collaborative, it's more specific to test planning.

D (Definition of Beta Testing sessions) is less relevant to ongoing collaborative work between testers and BAs — this involves users and release planning.

Answer: B. Development of acceptance criteria for user stories

Clear, complete, and testable requirements or user stories are critical for effective acceptance testing. Ambiguities or vague statements lead to differing interpretations by stakeholders, developers, and testers. This often results in software that doesn’t meet user expectations or in tests that fail to verify business needs correctly.

Option B is correct because it highlights the importance of precise requirements in both implementation and testing phases. Ambiguities can result in incorrect behavior, untestable features, or test cases that don’t align with business goals.

Other options:

A is risky — while testers may explore assumptions during exploratory testing, relying on assumptions rather than clarification increases risk.

C is incorrect — the INVEST mnemonic helps write better user stories, but it doesn’t replace review or validation processes.

D is false — Agile still values requirements engineering; it’s more collaborative and incremental, with the product owner playing a key role, not diminishing its importance.

Answer: B. Vague or ambiguous requirements may lead to misunderstandings both during implementation and testing

Performance testing assesses how a system behaves under specific conditions, typically focusing on responsiveness, stability, and resource usage. The type of performance test depends on the workload model:

Load testing evaluates performance under expected peak usage.

Stress testing pushes the system beyond its capacity to assess limits.

Endurance/stability testing checks for performance degradation over extended periods.

Option A correctly describes that performance test types are determined by the workload simulation strategy.

Other options:

B confuses performance with security testing — malicious attack robustness is a security focus, not performance.

C is partly correct but less comprehensive than A. While testing should simulate realistic conditions, categorization into stress/load/endurance is better aligned with workload modeling.

D is misleading — performance tests validate systems against performance requirements; they are not primarily used to define them.

Answer: A. Depending on the model used to simulate the workload, performance tests are called load, stress or endurance / stability tests.