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ISTQB Certified Tester AI Testing Exam Question and Answers

ISTQB Certified Tester AI Testing Exam

Last Update Jan 14, 2026
Total Questions : 120

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Questions 1

"Splendid Healthcare" has started developing a cancer detection system based on ML. The type of cancer they plan on detecting has 2% prevalence rate in the population of a particular geography. It is required that the model performs well for both normal and cancer patients.

Which ONE of the following combinations requires MAXIMIZATION?

SELECT ONE OPTION

Options:

A.  

Maximize precision and accuracy

B.  

Maximize accuracy and recall

C.  

Maximize recall and precision

D.  

Maximize specificity number of classes

Discussion 0
Questions 2

Which of the following is a dataset issue that can be resolved using pre-processing?

Options:

A.  

Insufficient data

B.  

Invalid data

C.  

Wanted outliers

D.  

Numbers stored as strings

Discussion 0
Questions 3

A startup company has implemented a new facial recognition system for a banking application for mobile devices. The application is intended to learn at run-time on the device to determine if the user should be granted access. It also sends feedback over the Internet to the application developers. The application deployment resulted in continuous restarts of the mobile devices.

Which of the following is the most likely cause of the failure?

Options:

A.  

The feedback requires a physical connection and cannot be sent over the Internet

B.  

Mobile operating systems cannot process machine learning algorithms

C.  

The size of the application is consuming too much of the phone's storage capacity

D.  

The training, processing, and diagnostic generation are too computationally intensive for the mobile device hardware to handle

Discussion 0
Questions 4

Which statement describes factors related to test data that make testing AI-based systems difficult?

Choose ONE option (1 out of 4)

Options:

A.  

Using the same implementation for data acquisition by data scientists and testers prevents defect masking

B.  

Creating and managing large amounts of test data can be difficult, especially when it needs to be representative

C.  

The input data must always be the same over time, especially in real-world systems

D.  

Artificially generated data requires legal approval and must be sanitized and encrypted

Discussion 0
Questions 5

A neural network has been designed and created to assist day-traders improve efficiency when buying and selling commodities in a rapidly changing market. Suppose the test team executes a test on the neural network where each neuron is examined. For this network, the shortest path indicates a "buy" and it will only occur when the one-day predicted value of the commodity is greater than the spot price by 0.75%. The neurons are stimulated by entering commodity prices and testers verify that they activate only when the future value exceeds the spot price by at least 0.75%.

Which of the following statements BEST explains the type of coverage being tested on the neural network?

Options:

A.  

Threshold coverage

B.  

Neuron coverage

C.  

Sign-change coverage

D.  

Value-change coverage

Discussion 0
Questions 6

A wildlife conservation group would like to use a neural network to classify images of different animals. The algorithm is going to be used on a social media platform to automatically pick out pictures of the chosen animal of the month. This month’s animal is set to be a wolf. The test team has already observed that the algorithm could classify a picture of a dog as being a wolf because of the similar characteristics between dogs and wolves. To handle such instances, the team is planning to train the model with additional images of wolves and dogs so that the model is able to better differentiate between the two.

What test method should you use to verify that the model has improved after the additional training?

Options:

A.  

Metamorphic testing because the application domain is not clearly understood at this point

B.  

Adversarial testing to verify that no incorrect images have been used in the training

C.  

Pairwise testing using combinatorics to look at a long list of photo parameters

D.  

Back-to-back testing using the version of the model before training and the new version of the model after being trained with additional images

Discussion 0
Questions 7

An engine manufacturing facility wants to apply machine learning to detect faulty bolts. Which of the following would result in bias in the model?

Options:

A.  

Selecting training data purposely excluding specific faulty conditions

B.  

Selecting training data by purposely including all known faulty conditions

C.  

Selecting testing data from a different dataset than the training dataset

D.  

Selecting testing data from a boat manufacturer's bolt longevity data

Discussion 0
Questions 8

Which data-labeling approach uses a two-step process where labeling is first done by a tool and then verified or completed by a human?

Choose ONE option (1 out of 4)

Options:

A.  

Internal data labeling

B.  

Crowdsourced data labeling

C.  

Outsourced data labeling

D.  

AI-assisted data labeling

Discussion 0
Questions 9

How can a tester check the system for bias as part of a review of data sources, acquisition, and preprocessing?

Choose ONE option (1 out of 4)

Options:

A.  

During the review, it can uncover algorithmic bias by analysing the procedures used to obtain the training data.

B.  

During the review of the preprocessing, the auditor can uncover whether the data has been influenced in a way that could lead to sample distortions.

C.  

It may use the LIME method as part of its data collection review to detect inappropriate bias.

D.  

As part of the review of preprocessing, it can reveal whether the data has been influenced in a way that could lead to algorithmic bias.

Discussion 0
Questions 10

Consider an AI-system in which the complex internal structure has been generated by another software system. Why would the tester choose to do black-box testing on this particular system?

Options:

A.  

Test automation can be built quickly and easily from the test cases developed during black-box testing

B.  

The tester wishes to better understand the logic of the software used to create the internal structure

C.  

The black-box testing method will allow the tester to check the transparency of the algorithm used to create the internal structure

D.  

Black-box testing eliminates the need for the tester to understand the internal structure of the AI-system

Discussion 0
Questions 11

Which statement about AI-based test case generation is correct?

Choose ONE option (1 out of 4)

Options:

A.  

AI-generated functional test cases typically result in poor requirements coverage.

B.  

A different test oracle is usually required for each AI-generated functional test case.

C.  

Expected results may not be available for AI-generated functional test cases.

D.  

An AI-based system under test must not be used as a functional test oracle.

Discussion 0
Questions 12

Which ONE of the following types of coverage SHOULD be used if test cases need to cause each neuron to achieve both positive and negative activation values?

SELECT ONE OPTION

Options:

A.  

Value coverage

B.  

Threshold coverage

C.  

Sign change coverage

D.  

Neuron coverage

Discussion 0
Questions 13

Which characteristic of AI-based systems makes it difficult to ensure they are safe (e.g., not harming humans)?

Choose ONE option (1 out of 4)

Options:

A.  

Determinism

B.  

Complexity

C.  

Interpretability

D.  

Robustness

Discussion 0
Questions 14

Which of the following statements about the structure and function of neural networks is true?

Choose ONE option (1 out of 4)

Options:

A.  

The bias of a neuron is determined by the activation values of the neurons in the previous layer

B.  

Training a neural network only changes the values of the weights at the connections between neurons

C.  

A single-layer perceptron is NOT a neural network

D.  

The input layer of a deep neural network must have at least as many neurons as its output layer

Discussion 0
Questions 15

A word processing company is developing an automatic text correction tool. A machine learning algorithm was used to develop the auto text correction feature. The testers have discovered that when they start typing “Isle of Wight” it fills in “Isle of Eight”. Several UAT testers have accepted this change without noticing. What type of bias is this?

Options:

A.  

Geographical/Locality

B.  

Automation/Complacency

C.  

Complacency/Disregard

D.  

Ignorance/Cognitive

Discussion 0
Questions 16

In a conference on artificial intelligence (Al), a speaker made the statement, "The current implementation of Al using models which do NOT change by themselves is NOT true Al*. Based on your understanding of Al, is this above statement CORRECT or INCORRECT and why?

SELECT ONE OPTION

Options:

A.  

This statement is incorrect. Current Al is true Al and there is no reason to believe that this fact will change over time.

B.  

This statement is correct. In general, what is considered Al today may change over time.

C.  

This statement is incorrect. What is considered Al today will continue to be Al even as technology evolves and changes.

D.  

This statement is correct. In general, today the term Al is utilized incorrectly.

Discussion 0
Questions 17

Which of the following problems would best be solved using the supervised learning category of regression?

Options:

A.  

Determining the optimal age for a chicken's egg-laying production using input data of the chicken's age and average daily egg production for one million chickens

B.  

Recognizing a knife in carry-on luggage at a security checkpoint in an airport scanner

C.  

Determining if an animal is a pig or a cow based on image recognition

D.  

Predicting shopper purchasing behavior based on the category of shopper and the positioning of promotional displays within a store

Discussion 0
Questions 18

An airline has created an ML model to project fuel requirements for future flights. The model imports weather data such as wind speeds and temperatures, calculates flight routes based on historical routings from air traffic control, and estimates loads from average passenger and baggage weights. The model performed within an acceptable standard for the airline throughout the summer but as winter set in, the load weights became less accurate. After some exploratory data analysis, it became apparent that luggage weights were higher in the winter than in summer.

Which of the following statements BEST describes the problem and how it could have been prevented?

Options:

A.  

The model suffers from drift and therefore should be regularly tested to ensure that any occurrences of drift are detected soon enough for the problem to be mitigated

B.  

The model suffers from drift and therefore the performance standard should be eased until a new model with more transparency can be developed

C.  

The model suffers from corruption and therefore should be reloaded into the computer system being used, preferably with a method of version control to prevent further changes

D.  

The model suffers from a lack of transparency and therefore should be regularly tested to ensure that any progressive errors are detected soon enough for the problem to be mitigated

Discussion 0
Questions 19

Which of the following is an example of an input change where it would be expected that the AI system should be able to adapt?

Options:

A.  

It has been trained to recognize cats and is given an image of a dog

B.  

It has been trained to recognize human faces at a particular resolution and it is given a human face image captured with a higher resolution

C.  

It has been trained to analyze mathematical models and is given a set of landscape pictures to classify

D.  

It has been trained to analyze customer buying trend data and is given information on supplier cost data

Discussion 0
Questions 20

Which of the following statements about reinforcement learning is correct?

Choose ONE option (1 out of 4)

Options:

A.  

The agent creates a model of the environment from labeled data during training

B.  

The approach is suitable when the application doesnotrequire interaction with the environment

C.  

The agent’s training is based on a reward function that rewards successful attempts

D.  

From experience, the agent learns theoptimal reward function

Discussion 0
Questions 21

Which statement regarding AI for defect prediction is correct?

Choose ONE option (1 out of 4)

Options:

A.  

AI-based defect prediction is most effective when based on previous similar constellations.

B.  

AI-based defect prediction can detect whether defects exist but not where.

C.  

AI-based defect prediction is most effective when based on source-code metrics such as branches or McCabe complexity.

D.  

AI-based defect prediction is based on formal principles and requires only a few factors.

Discussion 0
Questions 22

Which ONE of the following options does NOT describe a challenge for acquiring test data in ML systems?

SELECT ONE OPTION

Options:

A.  

Compliance needs require proper care to be taken of input personal data.

B.  

Nature of data constantly changes with lime.

C.  

Data for the use case is being generated at a fast pace.

D.  

Test data being sourced from public sources.

Discussion 0
Questions 23

A company is using a spam filter to attempt to identify which emails should be marked as spam. Detection rules are created by the filter that causes a message to be classified as spam. An attacker wishes to have all messages internal to the company be classified as spam. So, the attacker sends messages with obvious red flags in the body of the email and modifies the "from" portion of the email to make it appear that the emails have been sent by company members. The testers plan to use exploratory data analysis (EDA) to detect the attack and use this information to prevent future adversarial attacks.

How could EDA be used to detect this attack?

Options:

A.  

EDA can help detect the outlier emails from the real emails

B.  

EDA can detect and remove the false emails

C.  

EDA can restrict how many inputs can be provided by unique users

D.  

EDA cannot be used to detect the attack

Discussion 0
Questions 24

Which ONE of the following approaches to labelling requires the least time and effort?

SELECT ONE OPTION

Options:

A.  

Outsourced

B.  

Pre-labeled dataset

C.  

Internal

D.  

Al-Assisted

Discussion 0
Questions 25

Which ONE of the following options describes the LEAST LIKELY usage of Al for detection of GUI changes due to changes in test objects?

SELECT ONE OPTION

Options:

A.  

Using a pixel comparison of the GUI before and after the change to check the differences.

B.  

Using a computer vision to compare the GUI before and after the test object changes.

C.  

Using a vision-based detection of the GUI layout changes before and after test object changes.

D.  

Using a ML-based classifier to flag if changes in GUI are to be flagged for humans.

Discussion 0
Questions 26

Which assignment of AI techniques to testing support is BEST?

Choose ONE option (1 out of 4)

Options:

A.  

Classification for the optimization of regression test cases

B.  

Probabilistic methods for the prediction of system failures

C.  

Fuzzy logic for the generation of test cases

D.  

Computational optimization techniques for defect prediction

Discussion 0
Questions 27

Which statement about using AI to analyze reported defects is MOST correct?

Choose ONE option (1 out of 4)

Options:

A.  

ML models trained with critical defect tickets can identify defects that cause serious consequences.

B.  

ML models can support duplicate defect identification when checking defect criticality.

C.  

ML models can identify categories for a reported defect during assignment.

D.  

ML models identify developers who should handle a defect based on ticket content.

Discussion 0
Questions 28

A system is to be developed to detect lung cancer using X-ray images.

Which statement BEST describes the difference between a conventional system and an AI system with supervised machine learning?

Choose ONE option (1 out of 4)

Options:

A.  

The results of analyzing an X-ray for lung cancer using an AI system are more understandable than with a conventional system.

B.  

The X-ray images that an AI system can analyze must be structurally different from X-ray images used in a conventional system.

C.  

An AI system independently determines patterns in X-rays during training; a conventional system requires a human to program in those patterns.

D.  

The implementation of an AI system consists mainly of training data, whereas that of a conventional system consists of branches and loops.

Discussion 0
Questions 29

Which supervised-learning classification/regression statement is correct?

Choose ONE option (1 out of 4)

Options:

A.  

Recognizing a dog from many different images is a regression problem

B.  

Deciding whether an object is a bicycle or a motorcycle is a classification problem

C.  

Predicting that diesel prices will increase by ~10% is a classification problem

D.  

In classification, objects are always assigned to exactly two classes

Discussion 0
Questions 30

A ML engineer is trying to determine the correctness of the new open-source implementation *X", of a supervised regression algorithm implementation. R-Square is one of the functional performance metrics used to determine the quality of the model.

Which ONE of the following would be an APPROPRIATE strategy to achieve this goal?

SELECT ONE OPTION

Options:

A.  

Add 10% of the rows randomly and create another model and compare the R-Square scores of both the model.

B.  

Train various models by changing the order of input features and verify that the R-Square score of these models vary significantly.

C.  

Compare the R-Square score of the model obtained using two different implementations that utilize two different programming languages while using the same algorithm and the same training and testing data.

D.  

Drop 10% of the rows randomly and create another model and compare the R-Square scores of both the models.

Discussion 0
Questions 31

A beer company is trying to understand how much recognition its logo has in the market. It plans to do that by monitoring images on various social media platforms using a pre-trained neural network for logo detection. This particular model has been trained by looking for words, as well as matching colors on social media images. The company logo has a big word across the middle with a bold blue and magenta border.

Which associated risk is most likely to occur when using this pre-trained model?

Options:

A.  

There is no risk, as the model has already been trained

B.  

Insufficient function: the model was not trained to check for colors or words

C.  

Improper data preparation

D.  

Inherited bias: the model could have inherited unknown defects

Discussion 0
Questions 32

You are testing an autonomous vehicle which uses AI to determine proper driving actions and responses. You have evaluated the parameters and combinations to be tested and have determined that there are too many to test in the time allowed. It has been suggested that you use pairwise testing to limit the parameters. Given the complexity of the software under test, what is likely the outcome from using pairwise testing?

Options:

A.  

The number of parameters to test can be reduced to less than a dozen

B.  

All high priority defects will be identified using this method

C.  

While the number of tests needed can be reduced, there may still be a large enough set of tests that automation will be required to execute all of them

D.  

Pairwise cannot be applied to this problem because there is AI involved and the evolving values may result in unexpected results that cannot be verified

Discussion 0
Questions 33

Which of the following is an example of overfitting?

Options:

A.  

The model is not able to generalize to accommodate new types of data

B.  

The model is too simplistic for the data

C.  

The model is missing relationships between the inputs and outputs

D.  

The model discards data it considers to be noise or outliers

Discussion 0
Questions 34

Which ONE of the following describes a situation of back-to-back testing the LEAST?

SELECT ONE OPTION

Options:

A.  

Comparison of the results of a current neural network model ML model implemented in platform A (for example Pytorch) with a similar neural network model ML model implemented in platform B (for example Tensorflow), for the same data.

B.  

Comparison of the results of a home-grown neural network model ML model with results in a neural network model implemented in a standard implementation (for example Pytorch) for same data

C.  

Comparison of the results of a neural network ML model with a current decision tree ML model for the same data.

D.  

Comparison of the results of the current neural network ML model on the current data set with a slightly modified data set.

Discussion 0
Questions 35

Which statement regarding the use of training, validation, and test data sets is correct?

Choose ONE option (1 out of 4)

Options:

A.  

If only limited data is available, validation and test data sets can be combined in multiple ways during training.

B.  

If limited data is available, it may be better to work without a separate test data set.

C.  

Optimally, the data should be distributed equally between the training, validation, and test data sets.

D.  

The data in the test data set must be equivalent to the data in the training data sets and to the data in the validation data sets.

Discussion 0
Questions 36

Which statement regarding flexibility and adaptability of AI-based systems is correct?

Choose ONE option (1 out of 4)

Options:

A.  

Adaptability and flexibility are important when the system needs to change its behavior and determine the change on its own.

B.  

Adaptability is considered to be the ability of the system to be used in unspecified situations.

C.  

Self-learning AI-based systems are classified according to whether they are adaptable only or flexible only.

D.  

Flexibility is considered to be the ease with which the system can be reprogrammed to a changed operating condition.

Discussion 0