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Android Senior Developer Interview Questions

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1,907 android senior developer interview questions shared by candidates

1. Design Simple ConstraintLayout which is recyclable. 2. Java and Kotlin questions. val and var differences, reduce, join, fold, sealed classes, inheritance, etc 3. Tools related queries. RxJava, Dagger and Geofencing 4. Core Android queries like Multi-threading, Handling Nested Memory leaks 5. Unit Testing 6. Design Patterns
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Senior Android Developer

Interviewed at Virtusa

3.7★
Jun 1, 2020

1. Design Simple ConstraintLayout which is recyclable. 2. Java and Kotlin questions. val and var differences, reduce, join, fold, sealed classes, inheritance, etc 3. Tools related queries. RxJava, Dagger and Geofencing 4. Core Android queries like Multi-threading, Handling Nested Memory leaks 5. Unit Testing 6. Design Patterns

1st Round by Recruiter: 3 sets of questions. 1. Java - Equals & Hashcode, Arraylist & LinkedList, Threads, Collections. 2. Android - Activity lifecycle, Async Task, RecyclerView, View & ViewGroup lifecycle, Fragments. 3. Data Structure and Algorithms O(n) - Arraylist & linkedlist, HashMap - (insert, delete, access & add). 2. Round HackerRank Test: 1-5 MCQ (Java, Android & O(n)): - series of lifecycle events moving from Activity A to B. - View lifecycle on "requestLayout" & on "invalidate" - FInd time complexity of given code snippet. 6. Check balanced braces. 7. In Unsorted array find unique pair where sum of these pair is K. 8. Problem on graph subcomponents.(Zombie Cluster). 3. Round By Android Developer(mostly 2-4 years exp.) Android/Java Theory & O(n) Android: Activity LifeCycle, View LifeCycle, Opinion on why RecyclerView is lagging(scrolls slowly), Async Task, MVP, Service. JAVA: equals & hashcode, Arraylist & LInkedList, Threads, Lock, Object (wait, notify), Synchronization, Checked & Unchecked Exception, How to create unchecked exception, collections, Design Patterns. O(n): 1. ArrayList & LinkedList(Insert, add, delete, access). 2. Traverse whole items in ArrayList & LinkedList which is faster? both are O(n), O(n) but ArrayList would be faster. 4. Code Pair (HackerRank) By Senior Developer(Around 5-8 years) Opinion on why RecyclerView is lagging(scrolls slowly). Q. Write a function to reverse the integer. - what if no is negative - what if reversed no is no longer in range of integer return 0 (check with Integer.MAX_VALUE & Integer.MIN_VALUE)
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Senior Android Developer

Interviewed at Bumble Inc.

2.7★
Nov 13, 2017

1st Round by Recruiter: 3 sets of questions. 1. Java - Equals & Hashcode, Arraylist & LinkedList, Threads, Collections. 2. Android - Activity lifecycle, Async Task, RecyclerView, View & ViewGroup lifecycle, Fragments. 3. Data Structure and Algorithms O(n) - Arraylist & linkedlist, HashMap - (insert, delete, access & add). 2. Round HackerRank Test: 1-5 MCQ (Java, Android & O(n)): - series of lifecycle events moving from Activity A to B. - View lifecycle on "requestLayout" & on "invalidate" - FInd time complexity of given code snippet. 6. Check balanced braces. 7. In Unsorted array find unique pair where sum of these pair is K. 8. Problem on graph subcomponents.(Zombie Cluster). 3. Round By Android Developer(mostly 2-4 years exp.) Android/Java Theory & O(n) Android: Activity LifeCycle, View LifeCycle, Opinion on why RecyclerView is lagging(scrolls slowly), Async Task, MVP, Service. JAVA: equals & hashcode, Arraylist & LInkedList, Threads, Lock, Object (wait, notify), Synchronization, Checked & Unchecked Exception, How to create unchecked exception, collections, Design Patterns. O(n): 1. ArrayList & LinkedList(Insert, add, delete, access). 2. Traverse whole items in ArrayList & LinkedList which is faster? both are O(n), O(n) but ArrayList would be faster. 4. Code Pair (HackerRank) By Senior Developer(Around 5-8 years) Opinion on why RecyclerView is lagging(scrolls slowly). Q. Write a function to reverse the integer. - what if no is negative - what if reversed no is no longer in range of integer return 0 (check with Integer.MAX_VALUE & Integer.MIN_VALUE)

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