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ISQI ISTQB Certified Tester Advanced Level Test Analyst (CTAL-TA v4.0) Sample Questions:

1. You have been appointed to be a TA in the development of a road traffic control application, which will be installed at busy road junctions to control the operation of traffic signal lights according to sensors that detect traffic volume on the various approaches to the junction. The project is still in the early stages of test planning, but it is already clear that despite a tight schedule its safety-critical nature demands careful and thorough testing.
You have been asked to decide whether automated test design would deliver benefits. Which characteristic of automated test design is MOST important for the development of this system?

A) Less maintenance effort for the testware after the system has gone live
B) Creating the model will expose defects in the test basis early in the project
C) Testware generated by tools usually contains fewer mistakes than testware created manually
D) Testware can be generated in various output formats, e.g. for use by different tools

2. The following use case diagram shows the process of raising a Purchase Request (PR) and getting it authorized. Details are entered in batches; any that fail validation will be rejected and must be re-entered. The details will indicate whether the request is a normal one or an emergency one. Normal requests must be authorized by the department manager, who may refuse to do so. Emergency requests will be automatically authorized and reported to the manager.

The test strategy states that:
* all combinations of extensions and exceptions, as well as the main scenario, shall be tested
* loops shall get simple loop coverage where the maximum number of iterations for validation exceptions is 3 and the typical number is 2.
What is the minimum quantity of test cases that will be needed to obtain this coverage?

A) 5
B) 4
C) 7
D) 6

3. Your company, which specializes in medical software, has designed an application for use on smartphones and tablets, that calculates a person's BMI (Body Mass Index). How can a test analyst BEST contribute to adaptability testing for this application?

A) Designing tests to verify that the application works on as many as possible of the intended target devices
B) Ensuring that the application co-exists with other health applications without adversely affecting their performance
C) Verifying that correct BMIs have been calculated correctly for a range of weight, height and ethnic background inputs
D) Ensuring that the application launches successfully and functions correctly after downloading an updated version

4. A simple drinks machine is described in the following state transition diagram:

How many test cases will be needed for Chow's 1-switch coverage?

A) 28
B) 19
C) 40
D) 23

5. You are testing a program which calculates the best airspeed for optimal fuel economy of a new type of aero engine. The result depends on atmospheric pressure at the airplane's current height, the air temperature at the airplane's current height, and on the airplane's current fuel load. The best airspeed:
* decreases by 4 knots (nautical miles per hour) for every 5mb (millibar) decrease in atmospheric pressure,
* increases by 6 knots for every 1°C decrease in air temperature,
* increases by 1 knot for every 1,000kg decrease in fuel load.
You have a test case which predicts that at an atmospheric pressure of 1,000 mb, an air temperature of 10°C and a fuel load of 400,000kg, the optimal airspeed for an Airbus A380 is 600 knots.
Which test case would verify the metamorphic relation described in the three bullet points above?

A) Pressure 950mb, temp. 9°C, fuel 350,000kg, optimal airspeed = 616 knots
B) Pressure 950mb, temp. 10°C, fuel 360,000kg, optimal airspeed = 620 knots
C) Pressure 950mb, temp. 11°C, fuel 400,000kg, optimal airspeed = 610 knots
D) Pressure 1050mb, temp. 9°C, fuel 350,000kg, optimal airspeed = 590 knots

Solutions: