ISQI CTAL-TA_V4.0

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

1. You are testing a program which should calculate the area of a trapezium and have decided to use metamorphic testing. The formula Area = (((a + b) / 2) * h) where a and b are the lengths of the two parallel sides, and h is the height when the parallel sides are horizontal.
Which ONE of the following would be an appropriate metamorphic relation?

A) If b increases by x then h increases by ((x * 2) / 3)%
B) If b increases by x then area increases by ((x * 2) / 3)%
C) If b increases by x% then h increases by ((x * 2) / 3)%
D) If b increases by x% then area increases by ((x * 2) / 3)%

2. A Customer Relationship Management (CRM) system will be developed for a company that runs a chain of hotels. These are some of the requirements relating to staff in the call center.
* R1. High. An operator shall be able to find and see the details of a customer's booking. The data that may be used for the search include customer name, customer registration number (in the company's loyalty enrolment scheme) and booking reference.
* R2. High. An operator shall be able to amend a customer's booking. The data that may be amended include check-in and check-out dates, hotel, room type and tariff (with / without breakfast).
* R3. High. Before a booking amendment is accepted, the system shall display to the operator any difference in price with respect to the original booking. The operator shall confirm that the customer accepts the revised price and then the system shall record the accepted amendment.
* R4. Medium. Details of the amended booking shall be sent to the customer (see requirements for original customer booking for details).
* R5. High. Details of the extra amount payable shall be sent to the billing system for customer invoicing (see requirements for invoicing of the original customer booking for details).
You have been asked to review these requirements using this checklist:
* Specific - does each requirement deal with only a single aspect of the solution?
* Clear - is each requirement expressed in an unambiguous way with no possibility of interpretation or uncertainty about its meaning?
* Complete - does the set of requirements cover all of the stakeholders' reasonable needs?
* Unique - does each requirement address something that no other requirement also covers?
Assume that the other requirements referred to by R4 and R5 have been reviewed with a satisfactory outcome.
Considering these five requirements, to which checklist items would you answer 'No'?

A) 1 and 2
B) 2 and 3
C) 3 and 4
D) 1 and 4

3. 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) 6
B) 5
C) 4
D) 7

4. You are defining test environment requirements for an online retail application that will have to handle high transaction volumes and uses a third-party payment authorization gateway.
Which requirement is MOST important for the functional testing?

A) The ability to support white-box test techniques
B) The ability to simulate the payment authorization gateway
C) The ability to simulate the real end-user experience
D) The ability to simulate peak production transaction volumes

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

Solutions: