iOS Development iOS Testing and Debugging

Question 1

What framework does Apple provide natively for unit testing in iOS apps?

Accepted Answer

XCTest

Answer

JUnit

Answer

Mocha

Answer

TestNG

Question 2

Which method in XCTestCase is called before each individual test method runs?

Accepted Answer

setUp()

Answer

tearDown()

Answer

testStart()

Answer

prepareTest()

Question 3

What does the XCTAssertEqual function verify in an XCTest unit test?

Accepted Answer

That two values are equal

Answer

That a value is not nil

Answer

That a boolean expression is true

Answer

That a function throws an error

Question 4

What is the primary purpose of a mock object in iOS unit testing?

Accepted Answer

To replace real dependencies with controlled test doubles

Answer

To simulate live network calls with real data

Answer

To automatically generate random test data

Answer

To record and replay UI interactions

Question 5

Which Xcode keyboard shortcut runs all unit and UI tests in the current scheme?

Accepted Answer

Cmd+U

Answer

Cmd+B

Answer

Cmd+R

Answer

Cmd+T

Question 6

What does code coverage measure in the context of iOS testing?

Accepted Answer

The percentage of source code executed during tests

Answer

The total number of lines of code in the app

Answer

The number of test cases written for a target

Answer

The memory consumed during a test run

Question 7

What is the defining principle of Test-Driven Development (TDD) in iOS?

Accepted Answer

Writing failing tests before writing the implementation code

Answer

Writing tests after the app is fully implemented

Answer

Writing tests only for UI components

Answer

Using third-party tools to auto-generate test cases