In a platformer game, the player can double-jump. During testing, you notice that if the player presses the jump button twice very quickly, the second jump sometimes doesn't register, but if they wait a moment, it works. What is the most likely defect and cause?

A boundary issue in the jump input buffer, caused by an implementation error in the input handling code.

A performance issue causing frame drops, which makes the game miss the second input.

An unintended interaction between the double-jump and the animation system, caused by a requirement misunderstanding.

A logic error in the jump physics, caused by a design flaw in the gravity calculation.

Which of the following is a typical example of a boundary issue defect in game mechanics?

A player's health bar displays a negative value after taking damage when health is already at zero.

A quest objective remains incomplete even after the player has collected the required number of items.

A player can jump higher than intended when pressing the jump button multiple times quickly.

An enemy AI stops moving when the player is exactly at a certain distance from it.

A game mechanic allows a player to double-jump, but the game also grants an extra jump when the player lands on an enemy. The player can jump indefinitely by alternating between jumps and enemy landings. What is the most likely root cause of this defect?

A design flaw that did not account for the interaction between the double-jump and enemy-landing mechanics.

An implementation error in the jump physics code.

A boundary issue with the jump height limit.

A requirement misunderstanding about the number of jumps allowed.

Certified Tester Game Testing

Domain 2Objective 4

Examples of Defects in Game Mechanics and Possible Causes CT-GAME Practice Questions (Page 4)

Part of the Testing Game Mechanics domain, which makes up ~12% of our current practice bank. ISTQB does not publish an official question count, but from its 60-minute exam (~25–40 total, ~3–5 in this domain), expect 1–1 from this objective — we provide 18 practice questions to prepare you well beyond it. (estimate)

18questions here

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4concepts

Questions 16–18

16application · medium
In a platformer game, the player can double-jump. During testing, you notice that if the player presses the jump button twice very quickly, the second jump sometimes doesn't register, but if they wait a moment, it works. What is the most likely defect and cause?
Select an answer first
17foundation · easy
Which of the following is a typical example of a boundary issue defect in game mechanics?
Select an answer first
18foundation · easy
A game mechanic allows a player to double-jump, but the game also grants an extra jump when the player lands on an enemy. The player can jump indefinitely by alternating between jumps and enemy landings. What is the most likely root cause of this defect?
Select an answer first

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Examples of Defects in Game Mechanics and Possible Causes CT-GAME Practice Questions (Page 4)

Questions 16–18

In a platformer game, the player can double-jump. During testing, you notice that if the player presses the jump button twice very quickly, the second jump sometimes doesn't register, but if they wait a moment, it works. What is the most likely defect and cause?

Which of the following is a typical example of a boundary issue defect in game mechanics?

A game mechanic allows a player to double-jump, but the game also grants an extra jump when the player lands on an enemy. The player can jump indefinitely by alternating between jumps and enemy landings. What is the most likely root cause of this defect?

Keep studying — Testing Game Mechanics