Free iSQI CT-AI Exam Actual Questions & Explanations

Last updated on: Jun 17, 2026
Author: Lucas Young (Senior QA Certification Specialist, iSQI)

The CT-AI (Certified Tester AI Testing) exam, offered by iSQI under the ISTQB Certified Tester framework, validates your ability to test AI-based systems effectively. This credential is designed for quality assurance professionals who need to understand AI-specific testing challenges, from machine learning data validation to neural network behavior verification. This landing page guides you through the exam structure, core topics, and proven preparation strategies to help you succeed on your first attempt.

CT-AI Exam Syllabus & Core Topics

Use this topic map to guide your study for iSQI CT-AI (Certified Tester AI Testing) within the ISTQB Certified Tester path.

  • Introduction to AI: Understand foundational AI concepts, the distinction between traditional software and AI systems, and why conventional testing approaches often fall short for AI-based applications.
  • Quality Characteristics for AI-Based Systems: Identify and evaluate quality attributes specific to AI, including accuracy, fairness, robustness, and explainability, and determine how to measure them in real projects.
  • Machine Learning (ML): Grasp ML fundamentals, supervised versus unsupervised learning, and how model training and inference differ from deterministic software execution.
  • ML: Data: Assess data quality, detect bias and drift, validate training and test datasets, and recognize how data issues propagate through the model lifecycle.
  • ML Functional Performance Metrics: Interpret precision, recall, F1-score, confusion matrices, and ROC curves to evaluate model performance and set appropriate acceptance thresholds.
  • Neural Networks and Testing: Understand neural network architecture, activation functions, and layer behavior; apply testing strategies that account for non-linear decision boundaries and black-box characteristics.
  • Testing AI-Based Systems Overview: Plan and design end-to-end test strategies for AI systems, covering data pipeline, model training, validation, and production deployment phases.
  • Testing AI-Specific Quality Characteristics: Develop test cases that verify fairness, transparency, and robustness; detect adversarial examples and model degradation in production.
  • Methods and Techniques for the Testing of AI-Based Systems: Apply practical testing methods including metamorphic testing, property-based testing, and adversarial input generation to uncover AI-specific defects.
  • Test Environments for AI-Based Systems: Configure and manage test environments that replicate production data distributions, handle model versioning, and support continuous validation across staging and live systems.
  • Using AI for Testing: Leverage AI-driven testing tools for test case generation, anomaly detection in logs, and intelligent test prioritization to improve efficiency and coverage.

Question Formats & What They Test

The CT-AI exam uses multiple-choice and scenario-based items to assess both conceptual knowledge and applied reasoning in AI testing contexts. Questions progress in difficulty and emphasize decision-making in realistic project situations.

  • Multiple choice: Test core definitions, AI concepts, quality metrics, and terminology; for example, identifying which metric best measures classifier balance or recognizing signs of data drift.
  • Scenario-based items: Present real-world testing challenges, such as evaluating a model's fairness across demographic groups, deciding whether to retrain after production drift, or prioritizing test cases for a neural network classifier.
  • Application-focused: Questions require you to apply testing principles to concrete situations, such as interpreting a confusion matrix to assess model performance or designing a test strategy for an AI pipeline in a regulated industry.

Each question type demands both foundational knowledge and practical judgment, reflecting the skills needed in modern AI quality assurance roles.

Preparation Guidance

A structured study plan mapped to the CT-AI syllabus ensures you master each domain systematically. Dedicate 4-6 weeks to preparation, allocating time proportionally to topic complexity and your current knowledge gaps.

  • Week-by-week roadmap: Assign Introduction to AI and Quality Characteristics for AI-Based Systems to week one; Machine Learning (ML), ML: Data, and ML Functional Performance Metrics to weeks two and three; Neural Networks and Testing, Testing AI-Based Systems Overview, and Testing AI-Specific Quality Characteristics to weeks four and five; Methods and Techniques for the Testing of AI-Based Systems, Test Environments for AI-Based Systems, and Using AI for Testing to week six.
  • Active practice: Work through question sets after each topic block; review explanations for both correct and incorrect options to reinforce reasoning and identify misconceptions.
  • Cross-topic integration: Connect data quality concepts to model performance metrics, link testing techniques to specific quality characteristics, and trace how test environment choices affect real-world validation outcomes.
  • Timed mock exam: Complete a full-length practice test under exam conditions in your final week to build pacing confidence and reduce anxiety on test day.

Explore other iSQI certifications: view all iSQI exams.

Get the PDF & Practice Test

Strengthen your preparation with up-to-date resources from validexamdumps.com. These materials align to CT-AI and cover practical scenarios with clear explanations.

  • Q&A PDF with explanations: Topic-mapped questions that clarify why correct options are right and others aren't, helping you understand the reasoning behind each answer.
  • Practice Test: Realistic items in timed and untimed modes with progress tracking and detailed review to simulate exam conditions and identify weak areas.
  • Focused coverage: Aligned to Introduction to AI, Quality Characteristics for AI-Based Systems, Machine Learning (ML), ML: Data, ML Functional Performance Metrics, Neural Networks and Testing, Testing AI-Based Systems Overview, Testing AI-Specific Quality Characteristics, Methods and Techniques for the Testing of AI-Based Systems, Test Environments for AI-Based Systems, and Using AI for Testing, so you study what matters most.
  • Regular updates: Content refreshes that reflect syllabus and product changes, ensuring your study materials remain current and accurate.

Visit the exam page to download the PDF, Online Practice Test, or get a Bundle Discount offer for both formats: Certified Tester AI Testing.

Frequently Asked Questions

Which syllabus topics carry the most exam weight for CT-AI?

Quality Characteristics for AI-Based Systems, ML Functional Performance Metrics, and Methods and Techniques for the Testing of AI-Based Systems typically account for a larger share of exam items. However, all eleven domains are examinable, so balanced preparation across all topics is essential. Focus extra effort on areas where you have less hands-on experience.

How do data quality and model performance metrics connect in real testing workflows?

Data quality directly determines model performance; poor training data leads to low metrics like precision and recall. In practice, you must validate data pipelines, detect drift, and interpret performance metrics together to diagnose whether failures stem from data issues or model design flaws. This connection appears frequently in scenario-based questions on the exam.

What hands-on experience helps most, and which labs should I prioritize?

Experience with Python ML libraries (scikit-learn, TensorFlow), data exploration tools, and confusion matrix interpretation is valuable. Prioritize labs that involve training a simple classifier, evaluating it with multiple metrics, and detecting performance degradation on new data. Even brief hands-on work reinforces concepts far better than reading alone.

What common mistakes lead to lost points on the CT-AI exam?

Candidates often confuse precision with recall, misinterpret what data drift means for model behavior, or overlook the importance of fairness testing in regulated contexts. Another frequent error is assuming traditional test case design applies unchanged to AI systems. Review the differences between AI and deterministic software testing carefully, and practice interpreting metrics in context.

What is the best pacing and review strategy for the final week before the exam?

In your final week, focus on timed practice tests and targeted review of topics where you scored lowest. Avoid learning new material; instead, reinforce weak areas and build confidence with full-length mocks. On the day before the exam, do a light review of key definitions and metrics, then rest well. Pacing during the exam itself matters too: allocate roughly 1-1.5 minutes per question and flag difficult items to revisit if time permits.

Question No. 1

Which option gives the correct values for accuracy and precision from the confusion matrix?

Choose ONE option (1 out of 4)

Show Answer Hide Answer
Correct Answer: B

From the confusion matrix:

True Positives (TP) = 15

False Positives (FP) = 5

False Negatives (FN) = 15

True Negatives (TN) = 65

Accuracy= (TP + TN) / Total

= (15 + 65) / 100

=80%

Precision= TP / (TP + FP)

= 15 / (15 + 5)

= 15 / 20

=75%

Section3.2 -- Functional Performance Criteriain the syllabus explains accuracy and precision exactly these ways when evaluating ML classification performance.

Option B is therefore the only correct pair of values.


Question No. 2

An e-commerce developer built an application for automatic classification of online products in order to allow customers to select products faster. The goal is to provide more relevant products to the user based on prior purchases.

Which of the following factors is necessary for a supervised machine learning algorithm to be successful?

Show Answer Hide Answer
Correct Answer: A

The syllabus explains that supervised learning requires correctly labeled data so the algorithm can learn the relationship between input features and output labels:

'In supervised learning, the algorithm creates the ML model from labeled data during the training phase. The labeled data is used to infer the relationship between the input data and output labels.'

(Reference: ISTQB CT-AI Syllabus v1.0, Section 3.1.1)


Question No. 3

Upon testing a model used to detect rotten tomatoes, the following data was observed by the test engineer, based on certain number of tomato images.

For this confusion matrix which combinations of values of accuracy, recall, and specificity respectively is CORRECT?

SELECT ONE OPTION

Show Answer Hide Answer
Correct Answer: A

To calculate the accuracy, recall, and specificity from the confusion matrix provided, we use the following formulas:

Confusion Matrix:

Actually Rotten: 45 (True Positive), 8 (False Positive)

Actually Fresh: 5 (False Negative), 42 (True Negative)

Accuracy:

Accuracy is the proportion of true results (both true positives and true negatives) in the total population.

Formula: Accuracy=TP+TNTP+TN+FP+FN\text{Accuracy} = \frac{TP + TN}{TP + TN + FP + FN}Accuracy=TP+TN+FP+FNTP+TN

Calculation: Accuracy=45+4245+42+8+5=87100=0.87\text{Accuracy} = \frac{45 + 42}{45 + 42 + 8 + 5} = \frac{87}{100} = 0.87Accuracy=45+42+8+545+42=10087=0.87

Recall (Sensitivity):

Recall is the proportion of true positive results in the total actual positives.

Formula: Recall=TPTP+FN\text{Recall} = \frac{TP}{TP + FN}Recall=TP+FNTP

Calculation: Recall=4545+5=4550=0.9\text{Recall} = \frac{45}{45 + 5} = \frac{45}{50} = 0.9Recall=45+545=5045=0.9

Specificity:

Specificity is the proportion of true negative results in the total actual negatives.

Formula: Specificity=TNTN+FP\text{Specificity} = \frac{TN}{TN + FP}Specificity=TN+FPTN

Calculation: Specificity=4242+8=4250=0.84\text{Specificity} = \frac{42}{42 + 8} = \frac{42}{50} = 0.84Specificity=42+842=5042=0.84

Therefore, the correct combinations of accuracy, recall, and specificity are 0.87, 0.9, and 0.84 respectively.

References:

ISTQB CT-AI Syllabus, Section 5.1, Confusion Matrix, provides detailed formulas and explanations for calculating various metrics including accuracy, recall, and specificity.

'ML Functional Performance Metrics' (ISTQB CT-AI Syllabus, Section 5).


Question No. 4

Which ONE of the following hardware is MOST suitable for implementing Al when using ML?

SELECT ONE OPTION

Show Answer Hide Answer
Correct Answer: B

A . 64-bit CPUs.

While 64-bit CPUs are essential for handling large amounts of memory and performing complex computations, they are not specifically optimized for the types of operations commonly used in machine learning.

B . Hardware supporting fast matrix multiplication.

Matrix multiplication is a fundamental operation in many machine learning algorithms, especially in neural networks and deep learning. Hardware optimized for fast matrix multiplication, such as GPUs (Graphics Processing Units), is most suitable for implementing AI and ML because it can handle the parallel processing required for these operations efficiently.

C . High powered CPUs.

High powered CPUs are beneficial for general-purpose computing tasks and some aspects of ML, but they are not as efficient as specialized hardware like GPUs for matrix multiplication and other ML-specific tasks.

D . Hardware supporting high precision floating point operations.

High precision floating point operations are important for scientific computing and some specific AI tasks, but for many ML applications, fast matrix multiplication is more critical than high precision alone.

Therefore, the correct answer isBbecause hardware supporting fast matrix multiplication, such as GPUs, is most suitable for the parallel processing requirements of machine learning.


Question No. 5

Which of the following are the three activities in the data acquisition activities for data preparation?

Show Answer Hide Answer
Correct Answer: C

The syllabus defines data acquisition as consisting of three steps:

''Data acquisition: The activity of acquiring data relevant to the business problem to be solved by an ML model, typically involving the activities of identifying, gathering and labelling data.''

(Reference: ISTQB CT-AI Syllabus v1.0, Section 4.1, page 33 of 99)