15 to 30 random questions in 15 to 30 minutes, by the level you choose: kotlin, coroutines and flow, compose, viewmodel, room, retrofit, hilt. After you submit you get your score, your strong and weak topics, and the right answer with an explanation for every question.
Want to revise first? Read the Android (Kotlin) interview questions and answers.
The test covers 13 topics across three levels. Each attempt picks 15 to 30 questions at random, by the level you choose, so every attempt is different.
One question from each level, the way they appear in the test. A new set comes on the 1st of every month. Try it, then open the answer.
Answer: Each constant can carry its own values through the enum's constructor. enum class Plan(val priceRs: Int) { BASIC(199), PRO(499) } gives each constant its own price. Enums may also declare functions and implement interfaces, but the set of constants is fixed at compile time, so no new ones can be created.
Answer: It is discarded, because the user closed it on purpose. Saved instance state covers cases the system causes, such as rotation or process death. When the user presses Back or the code calls finish(), the activity is gone for good and its saved state is thrown away. Lasting data belongs in storage.
Answer: The build fails with a dependency cycle error. Dagger checks the graph at build time and reports the cycle. Break it by moving the shared logic into a third class, or by injecting Provider<T> or Lazy<T> on one side to delay creation. A cycle usually points to a class that should be split.
Take the full Android (Kotlin) mock test: 15 to 30 questions and 15 to 30 minutes, by level.
A question counts as right only when you pick exactly the right option, or all the right options where it says so; a question left blank counts as wrong. Your score is the share of the test's questions you got right (15 to 30, by level). The result also scores every topic, so you know what to revise before the interview.
Yes. The Android (Kotlin) mock test is free. You need a free CoreHRx Jobs account to start it, so your score and the topics to work on are saved.
It depends on the level: Fresher has 15 questions in 15 minutes, Intermediate has 20 questions in 20 minutes, Experienced has 30 questions in 30 minutes. They are multiple-choice questions picked at random from a larger bank of Android (Kotlin) questions at your level, so every attempt is different.
The questions cover Coroutines and Flow, Jetpack Compose, Activity and Fragment Lifecycle, Classes and Data Classes, Collections and Lambdas, Intents and Permissions, Room and Data Storage, ViewModel and State, Architecture and Hilt, Null Safety, Kotlin Basics, Background Work, Networking with Retrofit. Your result shows how you did in each topic.
Fresher if you are a student or have less than a year of experience, Intermediate for 1 to 5 years at work, and Experienced for 5 years or more.
Only your best Android (Kotlin) score, and only when it is 60% or more. It shows on the job applications you send on CoreHRx. Lower scores stay private.
Yes, up to 10 tests a day. Each attempt picks questions you have not seen recently first.
