EVRY India Software Developer Interview Questions and Answers

DSA

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Q1. Tell me about yourself.
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Q2. Very basic questions
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Round duration - 90 minutes
Round difficulty - Medium

We were supposed to give test in any time between 3 PM to 9 PM.

Q1. 
Total Unique Paths Problem Statement
You are located at point ‘A’, the top-left corner of an M x N matrix, and your target is point ‘B’, the bottom-right corner of the same matrix. Your task is to calcula...read more
Ans. 
The problem involves finding the total number of unique paths from the top-left to bottom-right cell of a matrix by moving only right or down.
• Use dynamic programming to solve the problem efficiently.

• Create a 2D array to store the number of unique paths at each cell.

• Initialize the first row and first column with 1 as there is only one way to reach them.

• For each cell (i, j), the number of unique paths is the sum of paths...read more
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Q2. 
Subtree Node Count Problem
We are provided with a tree containing 'N' nodes, numbered from 0 to N-1. The objective is to determine the total number of nodes within each subtree of the provided tree. Speci...read more
Ans. 
Given a tree with N nodes, find the number of elements in each subtree rooted at every node.
• Traverse the tree using Depth First Search (DFS) to calculate subtree sizes for each node.

• Use an array to store subtree sizes for each node, starting with leaf nodes having size 1.

• The subtree size of a node is the sum of subtree sizes of its children plus 1 for the node itself.
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Round duration - 120 minutes
Round difficulty - Medium

Pair Programming Interview( this round is similar to machine coding round) it started around 11 AM

Focus Areas: Problem solving and implementation of extensions.

The pair coding round is focused on OOPS concepts. You are paired with a TWer for this round. They let you code first for an hour and in the next hour they review your code and suggest changes which would improve the code structure, readability and make it modular and reusable and functional.
 

Q1. 
River Crossing: Help Ninja Cross Over
Ninja stands at the start of a wooden bridge over a river. Some segments of the bridge are damaged. The undamaged segments, marked as 'safe', are listed in an array S...read more
Ans. 
Check if Ninja can cross the river by jumping from one safe segment to another based on given constraints.
• Iterate through the 'SAFE' array and check if Ninja can make the required jumps to reach the last safe segment.

• Ensure that the next jump is either 'X' - 1, 'X', or 'X' + 1 units from the previous jump.

• Return 'true' if Ninja can successfully cross the river, otherwise return 'false'.
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Round duration - 120 minutes
Round difficulty - Medium

Students who were shortlisted from Pair Programming round was selected for this round around 3 PM. In this round there were two interviewer.

Q1. 
Middle of a Linked List
You are given the head node of a singly linked list. Your task is to return a pointer pointing to the middle of the linked list.
If there is an odd number of elements, return the ...read more
Ans. 
Return the middle element of a singly linked list, or the one farther from the head if there are even elements.
• Traverse the linked list with two pointers, one moving twice as fast as the other

• When the fast pointer reaches the end, the slow pointer will be at the middle

• Return the element pointed to by the slow pointer
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Q1. What are the different types of views?
Ans. 
Views in software development represent different ways to present data to users, enhancing user experience and interaction.
• 1. Model View Controller (MVC): Separates application logic, user interface, and data. Example: Ruby on Rails.

• 2. Model View ViewModel (MVVM): Facilitates two-way data binding. Example: WPF applications.

• 3. Single Page Application (SPA): Loads a single HTML page and dynamically updates content. Examp...read more
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Q2. How do you optimize your Spark code?
Ans. 
Optimizing Spark code involves improving performance through efficient resource usage and minimizing data shuffling.
• Use DataFrames and Datasets instead of RDDs for better optimization and performance.

• Leverage built-in functions for transformations instead of using UDFs, as they are optimized by Catalyst.

• Persist intermediate DataFrames when reused multiple times to avoid recomputation.

• Optimize data partitioning by using...read more
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Q1. What is mulesoft any point platform
Ans. 
MuleSoft Anypoint Platform is a unified, flexible integration platform that solves the most challenging connectivity problems.
• Anypoint Platform enables organizations to easily build, test, and deploy APIs, integrations, and applications.

• It provides a range of tools and services for designing, building, and managing APIs and integrations.

• Anypoint Platform includes features such as API management, data integration, and a...read more
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Q2. What is cloudhub and maven
Ans. 
CloudHub is a cloud-based integration platform, while Maven is a build automation tool for Java projects.
• CloudHub is used for integrating applications and services in the cloud.

• It provides a platform for deploying, managing, and scaling integrations.

• Maven is used for building and managing Java projects.

• It automates the process of building and packaging Java applications.

• Maven uses a project object model (POM) to manage...read more
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Q1. What is any point design center
Ans. 
Any point design center is a software design tool used for creating and editing graphical user interfaces.
• APDC is used for designing GUIs for desktop and mobile applications

• It allows for easy drag-and-drop of UI elements

• APDC supports multiple platforms and programming languages

• It offers a variety of templates and themes to choose from
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Q2. What is anypoint runtime fabric
Ans. 
Anypoint Runtime Fabric is a container service that automates the deployment and scaling of Mule runtimes.
• It provides a platform for deploying and managing Mule applications across on-premises, cloud, and hybrid environments.

• It enables high availability, fault tolerance, and disaster recovery for Mule runtimes.

• It supports Kubernetes as the underlying container orchestration platform.

• It allows for centralized management...read more
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Q1. What is java
Ans. 
Java is a high-level, object-oriented programming language designed for portability and performance across platforms.
• Developed by Sun Microsystems in 1995, now owned by Oracle.

• Java is platform-independent due to the Java Virtual Machine (JVM).

• It follows the principle of 'Write Once, Run Anywhere' (WORA).

• Commonly used for web applications, mobile apps (Android), and enterprise software.

• Example: Java code can be compiled...read more
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Q2. What is react
Ans. 
React is a popular JavaScript library for building user interfaces, particularly single-page applications, using a component-based architecture.
• Component-Based: React allows developers to create reusable UI components, making code more modular and maintainable.

• Virtual DOM: React uses a virtual representation of the DOM to optimize rendering and improve performance.

• Unidirectional Data Flow: Data in React flows in one di...read more
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