Entrata Android Developer Interview Questions and Answers

Q1. Technology oriented and basic concepts for the technology
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Q1. Employment specific and Previous CTC
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Q1. Are you open for Relocation
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Q1. What is TCP and IP
Ans. 
TCP (Transmission Control Protocol) and IP (Internet Protocol) are the foundational protocols of the internet.
• TCP is responsible for establishing and maintaining a reliable connection between two devices.

• IP is responsible for routing and addressing packets of data across networks.

• TCP/IP together form the basis of internet communication.

• Example: When you visit a website, TCP ensures the data packets are delivered in the...read more
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Q2. What is polymorphism
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Polymorphism is the ability of an object to take on many forms. It allows objects of different classes to be treated as the same type.
• Polymorphism is a fundamental concept in object-oriented programming.

• It allows for code reusability and flexibility.

• Polymorphism can be achieved through method overriding and method overloading.

• Example: A parent class Animal can have multiple child classes like Dog, Cat, and Bird. They c...read more
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Q3. What is abstract class
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An abstract class is a class that cannot be instantiated and is used as a base for other classes.
• An abstract class can have abstract methods that must be implemented by its subclasses.

• It can also have non-abstract methods that can be inherited by its subclasses.

• An abstract class provides a common interface for its subclasses.

• It is used to achieve abstraction and provide a blueprint for other classes.
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Q1. Tell me about yourself, availability, visa-related questions
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Dynamic programming questions, longg time to complete the 2 questions

Problem solving : a clock with 3 hands, no numbers written, guess what it is

1 hour 3 questions easy to medium leetcode.

Platform - Mettl
3 Questions of medium level difficulty to do in 2 hours, typically contain concepts like DSA, DP etc.

Q1. What is structure padding?
Ans. 
Structure padding is the insertion of unused bytes between structure members to align them on memory boundaries.
• Padding is added to ensure that each member of a structure starts at a memory address that is a multiple of its size.

• Padding is compiler-dependent and can vary between different platforms and architectures.

• Padding can affect the size of a structure and the performance of the program.

• Example: struct example { ...read more
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Q2. College Project discussion
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Q3. Form a dictionary from name.
Ans. 
Forming a dictionary from name
• Create an empty dictionary

• Iterate through each character in the name

• Add the character as a key and its frequency as value in the dictionary
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There will be 3 coding questions, Easy, moderate and hard level.

Q1. 2nd round will be technical round, they will ask mostly theoretical coding questions(Mostly array, Linked List), puzzles (Geeks Puzzles are enough).
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3 hours was the duration of the test. 3 questions were asked

3 coding questions - medium

Q1. Puzzles like matchstick problem
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Q2. Easy coding questions
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