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ISTQB CT-GENAI EXAM 2026 – 200+ PRACTICE QUESTIONS & ANSWERS WITH RATIONALES

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Pass the ISTQB Certified Tester – Generative AI (CT-GenAI) exam on your first attempt! This comprehensive guide features 200+ realistic practice questions with detailed rationales—covering generative vs. discriminative AI, hallucination testing, prompt engineering (chain-of-thought, few-shot, role prompting), LLM-powered test infrastructure (RAG, embeddings, vector databases), security risks (prompt injection, data poisoning, prompt leakage), model evaluation, LLMOps, and real-world scenario-based problems. Updated for the 2026 CT-GenAI Syllabus v1.1. Learn the "why" behind every answer, master AI testing concepts, and walk into your ISTQB certification exam with confidence. Perfect for software testers, QA engineers, and AI specialists. Download now and pass with ease!

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ISTQB CT-GENAI
Course
ISTQB CT-GENAI

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Page 1 of 63



Testing with Generative AI (CT-Genial)

Exam Questions And Correct Answers

(Verified Answers) Plus Rationales 2026

Q&A | Instant Download Pdf.

Question 1

What is the primary characteristic that distinguishes generative

AI from discriminative AI?

A) Generative AI only classifies existing data

B) Generative AI creates new content that resembles the training

distribution

C) Generative AI requires structured data only

D) Generative AI cannot be used for testing purposes

Answer: B

,Page 2 of 63


Rationale: Generative AI models learn the underlying

probability distribution of training data and can generate new

samples. Discriminative AI focuses on distinguishing between

categories (classification). The ability to create novel, realistic

outputs is the key differentiator .




Question 2

Which of the following is a typical application of generative AI

in software testing?

A) Static code analysis without ML

B) Generating synthetic test data

C) Manual test case design

D) Running performance tests

Answer: B

,Page 3 of 63


Rationale: Generative AI excels at producing realistic synthetic

data (text, images, tabular) to augment test datasets, simulate

edge cases, and preserve privacy. The other options do not

leverage generative capabilities .




Question 3

In the context of testing, a "test oracle" for a generative AI

system is:

A) The training dataset used to build the model

B) A mechanism to determine whether generated output is correct

C) The prompt template used by testers

D) The hardware acceleration for inference

Answer: B

Rationale: The test oracle is a principle or mechanism that

decides if a test passes or fails. For generative AI, oracles are

, Page 4 of 63


often non-trivial because outputs are probabilistic and lack a

single expected value .




Question 4

What does "hallucination" mean in generative AI testing?

A) The model refuses to answer a prompt

B) The model generates factually incorrect or nonsensical content

confidently

C) The model runs out of memory during inference

D) The model produces perfect outputs every time

Answer: B

Rationale: Hallucination is a well-known failure mode where a

generative model invents information that is not true or not

grounded in its training data. Testing must detect and mitigate

such outputs .

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