iOS Development iOS Testing and Debugging 2

Question 1

What is XCUITest primarily used for in iOS development?

Accepted Answer

Automating and testing the user interface

Answer

XCUITest is Apple's framework for writing automated UI tests that simulate real user interactions with the app.

Question 2

Which Xcode tool lets you visually inspect the view hierarchy as a 3D layer breakdown at runtime?

Accepted Answer

View Debugger

Answer

The View Debugger pauses the running app and renders a 3D exploded view of all UI layers and constraints.

Question 3

What is the main purpose of Xcode Instruments?

Accepted Answer

To profile and diagnose app performance and resource usage

Answer

Instruments is a performance analysis tool used to measure CPU, memory, energy, and other system resources.

Question 4

What type of problem does the Memory Graph Debugger in Xcode primarily help identify?

Accepted Answer

Retain cycles and memory leaks

Answer

The Memory Graph Debugger visualizes object reference graphs to help find retain cycles that prevent deallocation.

Question 5

Which XCTest API is used to test asynchronous operations that complete after a delay?

Accepted Answer

XCTestExpectation

Answer

XCTestExpectation creates a waitable condition that keeps the test alive until the async operation fulfills it or it times out.

iOS Development Practice Test