Infosys Senior Android Developer Interview Questions and Answers

Q1. Briefly explain about your self and work experience
Ans. 
I am a Senior Android Developer with 5+ years of experience in developing mobile applications for various industries.
• Developed and maintained multiple Android applications from concept to deployment

• Proficient in Java, Kotlin, and Android SDK

• Experience with RESTful APIs, third-party libraries, and version control systems like Git

• Strong problem-solving skills and ability to work in a team environment

• Familiar with Agile d...read more
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Q2. What is Higher order function
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Higher order function is a function that can take other functions as parameters or return functions as results.
• Higher order functions can be passed as arguments to other functions.

• Higher order functions can return functions as results.

• Examples include map, filter, and reduce functions in functional programming.
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Q3. What is inline keyword
Ans. 
The inline keyword is used in Kotlin to suggest that a function should be inlined at the call site.
• Used to eliminate the overhead of function calls by copying the function code directly at the call site

• Helps in improving performance by reducing the function call overhead

• Should be used for small functions or lambdas to avoid unnecessary function call overhead
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Q1. Explain the Agail methodology
Ans. 
Agile methodology is a project management approach that emphasizes flexibility, collaboration, and iterative development.
• Agile methodology focuses on delivering working software in short, iterative cycles called sprints.

• It values customer collaboration and responding to change over following a strict plan.

• Key principles include individuals and interactions over processes and tools, working software over comprehensive d...read more
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Q2. How do you handle the Team during your team lead experience
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Q1. What is Corotuine and explain builder type.
Ans. 
Coroutines are a way to perform asynchronous programming in Android. Builder type is used to create and configure a coroutine.
• Coroutines in Android are used for managing asynchronous tasks without blocking the main thread.

• Builder type is used to create a coroutine with specific configuration options.

• Example: 'launch' is a builder type used to start a new coroutine.
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Q2. Unit testing with example of code
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Unit testing is a software testing method where individual units or components of a software are tested in isolation.
• Unit testing helps in identifying bugs early in the development process.

• It ensures that each unit of code works correctly on its own.

• Unit tests are typically written using testing frameworks like JUnit or Mockito.

• Example: Testing a function that calculates the sum of two numbers.
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Q1. Kotlin collection
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Q2. Explain solid principle
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SOLID is a set of five design principles that help developers create more maintainable and scalable software.
• Single Responsibility Principle (SRP) - A class should have only one reason to change.

• Open/Closed Principle (OCP) - Software entities should be open for extension but closed for modification.

• Liskov Substitution Principle (LSP) - Objects of a superclass should be replaceable with objects of its subclasses without...read more
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Q3. Android related
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Testing of basic android skills

Q1. Basic of project structure
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