TCS Android App Developer Interview Questions and Answers

Q1. Agile, data class, how to initialize a class in activity?, dagger, difference between bind and provides annotation, unit test using mockito and junit
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Aptitude questions(seating arrangement,number series),verbal reasoning, Networking,Cloud based questions,and pseudocode

2 coding questions,one will be easy, other will be tough,solving atleast one problem is necessary.

Q1. Read the given sentence
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Q2. Hear and answer the question
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Q1. Tell me about yourself
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Q2. About college project(as I am fresher) ,about internship, difficulties faced and how we solved it
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Q1. Explain activity life cycle
Ans. 
Activity life cycle refers to the stages an activity goes through from creation to destruction.
• An activity is created using onCreate() method

• It becomes visible using onStart() method

• It becomes interactive using onResume() method

• It goes to background using onPause() method

• It becomes invisible using onStop() method

• It gets destroyed using onDestroy() method
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Q2. What is difference between abstract class and interface
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Abstract class is a class that can have both abstract and non-abstract methods while interface only has abstract methods.
• Abstract class can have constructors while interface cannot

• A class can implement multiple interfaces but can only inherit from one abstract class

• Abstract class can have instance variables while interface cannot

• Abstract class can provide default implementation for some methods while interface cannot

• Ex...read more
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Q1. Why are you looking for a change?
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Q2. Tell me about yourself.
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Q1. Scope functions in kotlin
Ans. 
Scope functions in Kotlin are functions that allow you to execute a block of code within the context of an object.
• There are five scope functions in Kotlin: let, run, with, apply, and also.

• Each scope function has a specific use case and can help improve code readability and reduce boilerplate code.

• Scope functions can be used to perform operations on an object and return a result or modify the object itself.

• For example, ...read more
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Q2. LazyRow vs RecyclerView
Ans. 
LazyRow is a Jetpack Compose component for displaying horizontally scrolling lists, while RecyclerView is a traditional Android view for displaying large data sets efficiently.
• LazyRow is part of Jetpack Compose, RecyclerView is part of the Android framework

• LazyRow is more declarative and easier to use for simple lists, RecyclerView is more powerful and customizable for complex lists

• LazyRow automatically handles recycli...read more
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There are 90 questions which are aptitude and reasoning and all, within 90 minutes of time we have solved all the problems.

There 2 coding questions there are easy level only in my opinion, within 1 hour we have solve.

Q1. Indrouce about yourself
Ans. 
I am a passionate Android App Developer with 5 years of experience in creating user-friendly and innovative mobile applications.
• 5 years of experience in Android app development

• Proficient in Java, Kotlin, and Android Studio

• Strong understanding of UI/UX design principles

• Experience with RESTful APIs and third-party libraries

• Published apps on Google Play Store
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Q2. What are projects you have done
Ans. 
I have developed a shopping app, a fitness tracker app, and a social media app.
• Developed a shopping app with user-friendly interface

• Created a fitness tracker app to monitor daily activities

• Designed a social media app with real-time messaging feature
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Q3. What are skills you had
Ans. 
I have strong skills in Java, Android Studio, UI/UX design, and problem-solving.
• Proficient in Java programming language

• Experience with Android Studio and Android app development

• Knowledge of UI/UX design principles

• Strong problem-solving skills
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Round duration - 140 minutes
Round difficulty - Medium

Test timing was at 2:00 pm , it was conducted in a college and the environment was good for the test. Camera was a primary part of test, so no suspicious activity.

Q1. 
Sum of Two Numbers Represented as Arrays
Given two numbers in the form of two arrays where each element of the array represents a digit, calculate the sum of these two numbers and return this sum as an ar...read more
Ans. 
Given two numbers represented as arrays, calculate their sum and return the result as an array.
• Iterate through the arrays from right to left, adding digits and carrying over if necessary

• Handle cases where one array is longer than the other by considering the remaining digits

• Ensure the final sum array does not have any leading zeros
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Round duration - 20 minutes
Round difficulty - Easy

The round was conducted at around 12 p.m. I was called at the college location and then it was conducted. The interviewer was quite polite and frank.

Round duration - 8 minutes
Round difficulty - Easy

This round was conducted right after finishing and clearing the technical round at the same place and on the same day.