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Airtribe Backend Developer Interview Questions and Answers
Airtribe Backend Developer Interview Experiences
1 interview found
Anonymous
(1 Question)
- Q1. They Asked to write a express server
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I applied via LinkedIn and was interviewed in Apr 2021. There were 4 interview rounds.
Interview Questionnaire
4 Questions
- Q1. 1. Mininum cost to reach the last cell of a 2D matrix. Required moves are only downward or to the right direction
- Ans.
Minimum cost to reach last cell of 2D matrix with only downward or right moves.
Use dynamic programming approach to solve the problem.
Calculate minimum cost for each cell by considering minimum cost of its adjacent cells.
Final answer will be the minimum cost to reach the last cell.
- Q2. Design a Stack that can support getMin functionality. Whenever it calls getMin on stack it should return the min element in the stack.
- Ans.
Design a stack that supports getMin functionality to return the minimum element in the stack.
Create two stacks, one for storing the actual elements and another for storing the minimum elements.
Push elements onto both stacks simultaneously.
When popping an element, pop from both stacks.
To get the minimum element, peek at the top of the minimum stack.
- Q3. Design a TreeSet functionality
- Ans.
TreeSet is a data structure that stores unique elements in sorted order.
TreeSet is implemented using a Red-Black tree
It provides O(log n) time complexity for basic operations like add, remove, and contains
It also provides methods like first(), last(), headSet(), tailSet(), and subSet()
TreeSet can be used to implement priority queues and sorting algorithms
- Q4. Design a ArrayList that supprorts all the existing funtions of a list plus getMax functionality also.
- Ans.
Design an ArrayList with getMax functionality.
Create a custom ArrayList class that extends the existing ArrayList class.
Add a getMax() method that returns the maximum value in the list.
Override the add() method to keep track of the maximum value in the list.
Update the maximum value whenever an element is added or removed from the list.
Interview Preparation Tips
Skills evaluated in this interview
(2 Questions)
- Q1. Java threads concepts and its usage
- Q2. Data structures problems and design quentions
I applied via Naukri.com and was interviewed in Mar 2024. There was 1 interview round.
-----.geeksforgeeks.org/replace-every-element-with-the-greatest-on-right-side/amp/
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Interview Preparation Tips
- DSA
- Core java
- Design Patterns
- Spring Boot
I applied via Company Website and was interviewed in Jan 2024. There was 1 interview round.
Given two soted arrays merge them from a single sorted array with all items in non-decreassing order
Selected
(1 Question)
- Q1. Human resources is tha set of people who make up the workforce of an organisation, business sector, industry.
(2 Questions)
- Q1. Connected with the partical use of machines, etc. in science and industry
- Q2. Connected with the skills involved in a particular activity or subject
Interview Preparation Tips
Selected
I applied via LinkedIn and was interviewed in Mar 2024. There were 2 interview rounds.
Aptitude Test based on general
Coding Test Based on backend technologies
Interview Preparation Tips
I applied via Naukri.com and was interviewed before Nov 2020. There were 5 interview rounds.
Interview Questionnaire
1 Question
- Q1. Leadership principles, Previous experience, Managerial and logical questions
Interview Preparation Tips
I applied via Company Website and was interviewed in May 2021. There was 1 interview round.
Interview Questionnaire
1 Question
- Q1. Coding questions
Interview Preparation Tips
I was interviewed in Dec 2020.
(1 Question)
Round duration - 25 Minutes
Round difficulty - Medium
Very friendly interviewer. Although waiting time was very high
- Q1.
Pair Sum Problem Statement
You are given an integer array 'ARR' of size 'N' and an integer 'S'. Your task is to find and return a list of all pairs of elements where each sum of a pair equals 'S'.
Note:
... - Ans.
Find pairs of elements in an array that sum up to a given value, sorted in a specific order.
Iterate through the array and for each element, check if the complement (S - current element) exists in a hash set.
If the complement exists, add the pair to the result list.
Sort the result list based on the criteria mentioned in the question.
Return the sorted list of pairs.
Interview Preparation Tips
Tip 1 : be confident about your CV points
Tip 2 : practice consulting cases and how to answer situational questions
Tip 1 : be crisp about achievement
Tip 2 : add data points to support your achievements
Skills evaluated in this interview
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