AAD Quality Assurance & Compliance 2

Question 1

Which Espresso method is used to check that a View is displayed on screen?

Accepted Answer

matches(isDisplayed())

Answer

Espresso uses `onView(matcher).check(matches(isDisplayed()))` to assert a View is visible.

Question 2

What does the `@SmallTest` annotation signal about an Android unit test?

Accepted Answer

The test runs quickly and has no external dependencies

Answer

`@SmallTest` indicates the test is fast and does not rely on the file system, network, or database.

Question 3

Which tool in Android Studio helps detect memory leaks by tracking object allocations over time?

Accepted Answer

Memory Profiler

Answer

The Memory Profiler records heap snapshots and allocation traces to identify leaked objects.

Question 4

When running instrumented tests on an emulator with `testInstrumentationRunner`, which class is the standard runner for AndroidX Test?

Accepted Answer

androidx.test.runner.AndroidJUnitRunner

Answer

`androidx.test.runner.AndroidJUnitRunner` is declared in `build.gradle` as the instrumentation runner for AndroidX tests.

Question 5

What is the primary purpose of the `IdlingResource` API in Espresso?

Accepted Answer

Synchronize test execution with asynchronous app operations

Answer

`IdlingResource` tells Espresso when the app is idle so the framework waits before proceeding with assertions.

(AAD) Associate Android Developer Certification Practice Test