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38 android team lead interview questions shared by candidates

You're in a house that has two rooms, and there's no way to see from one room to the other. One room has three light switches, and the other room has three corresponding light bulbs. You don't know which switch triggers which bulb and can only make a single trip between the two rooms. How do you find out?
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Senior Android Developer and Team Lead

Interviewed at Softxpert

3.8★
Oct 17, 2024

You're in a house that has two rooms, and there's no way to see from one room to the other. One room has three light switches, and the other room has three corresponding light bulbs. You don't know which switch triggers which bulb and can only make a single trip between the two rooms. How do you find out?

Working with Android layouts, asynchronous communication, java libraries, REST API client architecture. One logical task: you have an array of 99 distinct integers, each one can have a value between 1 and 100 inclusively. But no duplicates in an array. Array is not sorted. Find out which value is missing in the array.
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Android Team Lead

Interviewed at Ciklum

3.9★
Sep 5, 2015

Working with Android layouts, asynchronous communication, java libraries, REST API client architecture. One logical task: you have an array of 99 distinct integers, each one can have a value between 1 and 100 inclusively. But no duplicates in an array. Array is not sorted. Find out which value is missing in the array.

Perché avete scelto una architettura piuttosto che un'altra. Come identifichi i parametri che passi nelle chiamate Retrofit, quali tipi di parametri conosci, descrivi come effettuare una chiamata a servizio con Retrofit.
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Mobile Android Team Leader

Interviewed at NTT DATA

3.7★
Jun 25, 2020

Perché avete scelto una architettura piuttosto che un'altra. Come identifichi i parametri che passi nelle chiamate Retrofit, quali tipi di parametri conosci, descrivi come effettuare una chiamata a servizio con Retrofit.

2 rounds : Round 1 : 1. Coding round : 0 1 2 1 2 0 sort them optimally Android : 1. If we go to Activity A to Activity B which methods will be called? 2. Why can't we pass arguments in constructor 3. Disapatcher.IO vs Dispather.Default internal 4. How recycler view works internally 5. Why findViewid extension is deprecated 6. How viewmodel works internally 7. How suspend function works in android Architecture : 1. Create app which has list of users and login page, if it doesnt exist then it should show signup Round1 : Code LRU Android : 1. What is advantages of Room over SQlite 2. How can we observer value at room 3. How to handle error in Co-routines 4. What steps we will take to decrease APK size 5. How to handle backpressure in JAVA 6. What issue we get when using vector images 7. How do we use dagger2 clasess Architecture : We have given app tp build when has list of fruits and we need to show them in vertical list but with offline caching.
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Sr Android Developer and Team Lead

Interviewed at Skuad

3.8★
Aug 21, 2024

2 rounds : Round 1 : 1. Coding round : 0 1 2 1 2 0 sort them optimally Android : 1. If we go to Activity A to Activity B which methods will be called? 2. Why can't we pass arguments in constructor 3. Disapatcher.IO vs Dispather.Default internal 4. How recycler view works internally 5. Why findViewid extension is deprecated 6. How viewmodel works internally 7. How suspend function works in android Architecture : 1. Create app which has list of users and login page, if it doesnt exist then it should show signup Round1 : Code LRU Android : 1. What is advantages of Room over SQlite 2. How can we observer value at room 3. How to handle error in Co-routines 4. What steps we will take to decrease APK size 5. How to handle backpressure in JAVA 6. What issue we get when using vector images 7. How do we use dagger2 clasess Architecture : We have given app tp build when has list of fruits and we need to show them in vertical list but with offline caching.

Given a circular array of 0s and 1s find max number of consecutive 1s 12 balls of the same shape with 1 being defective. Given a weighing machine, you have 3 chances to find the defective one Custom LiveData
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Senior Android Developer and Team Lead

Interviewed at Chalo (India)

3.6★
Dec 19, 2022

Given a circular array of 0s and 1s find max number of consecutive 1s 12 balls of the same shape with 1 being defective. Given a weighing machine, you have 3 chances to find the defective one Custom LiveData

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