Indiafirst Robotics Interview Questions and Answers

Android basic + DSA and problem solving

Q1. Android in depth
Ans. 
Android is a mobile operating system developed by Google, based on the Linux kernel.
• Android is open-source and allows developers to create applications using Java or Kotlin.

• Android apps can be distributed through the Google Play Store or other third-party app stores.

• Android supports a wide range of devices, from smartphones and tablets to smart TVs and wearables.

• Android provides a rich set of APIs for accessing device ...read more
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Medium DSA question on dynamic programming

HackerRank Test - 2 Medium Questions
1. Given an Array Weights of Chocolates, Find Maximum amount of Chocolate that can be saved after "d" days, if you eat half the weight of one of the chocolates every day.
2. Find Closest String with equal number of vowels and consonants.

Q1. Question on DSA, Trees
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Q1. Coding questions on Data Structures
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Q2. SQL query to find salary department wise
Ans. 
Use SQL query to find salary department wise
• Use GROUP BY clause to group salaries by department

• Use SUM() function to calculate total salary for each department

• Join with department table if necessary to get department names
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Q1. Implement Linked list
Ans. 
Linked list is a data structure where each node points to the next node.
• Create a Node class with data and next pointer

• Create a LinkedList class with head pointer

• Implement methods to add, remove, search, and traverse the list
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Q2. Implement Hash Map with array and linked list.
Ans. 
Implement Hash Map with array and linked list.
• Create an array of linked lists

• Hash function maps keys to array indices

• Insert key-value pairs into linked lists

• Handle collisions by chaining

• Search for a key by hashing and traversing linked list
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Q3. How to create a immutable class in java
Ans. 
To create an immutable class in Java, follow these steps:
• Make the class final

• Make all fields private and final

• Do not provide any setter methods

• Initialize all fields via constructor

• If any field is mutable, return a clone of it instead of the original object
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Array duplicates and burn binary tree

Q1. Project specific
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