Android Engineer

Android Engineer Interview Questions and Answers

Updated 13 Nov 2024

Q1. Beautiful String

Ninja has been given a binary string ‘STR’ containing either ‘0’ or ‘1’. A binary string is called beautiful if it contains alternating 0s and 1s.

For Example:‘0101’, ‘1010’, ‘101’, ‘010’ are be...read more

Q2. Maximum Sum Rectangle

You are given a matrix ‘ARR’ with ‘N’ rows and ‘M’ columns. Your task is to find the maximum sum rectangle in the matrix.

Maximum sum rectangle is a rectangle with the maximum value for the...read more

Android Engineer Interview Questions and Answers for Freshers

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Q3. Reverse Blocks

You are given a Singly Linked List of integers and an integer array 'B' of size 'N'. Each element in the array 'B' represents a block size. Modify the linked list by reversing the nodes in each bl...read more

Q4. Technical Questions

Difference between constraint and relative layout Kotlin co routines.

Why kotlin over java.

Fragment life cycle with a live app explanation.

How to import 3d models in an app Broadcast receive...read more

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Q5. Depth of SOLID principles

Ans.

SOLID principles are a set of five design principles in object-oriented programming to make software designs more understandable, flexible, and maintainable.

S - Single Responsibility Principle: A class should have only one reason to change.
O - Open/Closed Principle: Software entities should be open for extension but closed for modification.
L - Liskov Substitution Principle: Objects of a superclass should be replaceable with objects of its subclasses without affecting the func...read more

Q6. Recompositions of composables

Ans.

Recompositions of composables allow for efficient updates of UI components in Jetpack Compose.

Recompositions are triggered when the state of a composable changes.
Composables are re-evaluated during recomposition to reflect the updated state.
Using key parameters can optimize recompositions by preserving state across recomposition calls.

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