SafexPay Java Developer Interview Questions and Answers for Freshers

They have problem of K sorted array and you need to make an sorted array of it.

Q1. Your current job role
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Q2. Software Developer
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Q1. Basic oops concepts and our projects
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Q2. Basic strucutes of oops concpts and micro services
Ans. 
OOPs concepts include encapsulation, inheritance, polymorphism, and abstraction. Microservices are small, independent services that communicate with each other.
• OOPs concepts help in creating modular and reusable code.

• Encapsulation ensures that data is hidden and can only be accessed through defined methods.

• Inheritance allows a class to inherit properties and methods from a parent class.

• Polymorphism allows objects to ta...read more
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Questions were based on basic aptitude like seating arrangement

Q1. Basic oops concepts
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Q2. SQL questions like triggers and creating an SQL table etc
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Q1. Coding like arrays basic codes like reversing an array
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We in group of 10 were given a topic on which 2 feature to select out of 4 for a project, it lasted about 10 minutes, was ok

Given a case study of a company, analyze it in 10 minutes and then questions were asked, i don't think it was useful for a Developer Role

Round duration - 90 minutes
Round difficulty - Hard

Timing was 9 PM. Platform was not good. Platform was very lagging so overall it was bad experience.

Q1. 
Find the Third Greatest Element
Given an array 'ARR' of 'N' distinct integers, determine the third largest element in the array.
Input:
The first line contains a single integer 'T' representing the numb...read more
Ans. 
Find the third largest element in an array of distinct integers.
• Sort the array in descending order and return the element at index 2.

• Handle cases where the array has less than 3 elements separately.

• Consider using a set to ensure distinct elements in the array.
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Q2. 
Longest Palindromic Substring Problem Statement
You are provided with a string STR of length N. The goal is to identify the longest palindromic substring within this string. In cases where multiple palind...read more
Ans. 
Identify the longest palindromic substring in a given string.
• Iterate through the string and expand around each character to find palindromes

• Keep track of the longest palindrome found

• Return the longest palindromic substring with the smallest start index
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Q3. 
Ninja and Geometry Problem Statement
In this problem, Ninja is provided with two lines on a 2D plane. The first line 'AB' is determined by two points A and B. The second line 'PQ' is determined by two poi...read more
Ans. 
Calculate the intersection point of two lines on a 2D plane with precision up to six decimal places.
• Use the formula for finding the intersection point of two lines in 2D space.

• Handle precision issues that may arise due to floating-point arithmetic.

• Return -1.000000 -1.000000 if the lines do not intersect.

• Ensure the lines 'AB' and 'PQ' are distinct.
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Round duration - 50 mins
Round difficulty - Medium

First round was coding round, where i was asked 2 DS algo questions, 1 was easy and other was of medium difficulty

Q1. 
Shortest Path in a Binary Matrix Problem Statement
Given a binary matrix of size N * M where each element is either 0 or 1, find the shortest path from a source cell to a destination cell, consisting only...read more
Ans. 
Find the shortest path in a binary matrix from a source cell to a destination cell consisting only of 1s.
• Use Breadth First Search (BFS) algorithm to find the shortest path.

• Keep track of visited cells to avoid revisiting them.

• Update the path length as you traverse through the matrix.

• Return -1 if no valid path exists.
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Round duration - 50 mins
Round difficulty - Easy

I was asked to design url shortner

Q1. Can you explain how you would design a URL shortener?
Ans. 
Design a URL shortener system
• Generate a unique short code for each URL

• Store the mapping of short code to original URL in a database

• Redirect users from short URL to original URL when accessed

• Consider implementing features like custom short codes, expiration dates, and analytics

• Ensure scalability and performance by using distributed systems and caching
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Round duration - 50 mins
Round difficulty - Medium

This was hiring manager round

Q1. Can you discuss a coding problem you encountered, your past projects, and any behavioral questions related to your experiences?
Ans. 
Discussed coding problem, past projects, and behavioral questions in SDE - 1 interview.
• Coding problem: Discussed how I optimized a sorting algorithm in a previous project.

• Past projects: Talked about a web application I developed using React and Node.js.

• Behavioral questions: Shared how I handled a conflict within a team during a project.

• Example: Explained how I implemented a feature in a mobile app that improved user en
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Q1. 1 - Easy Medium Question. Discuss the approach with interviewer and then implement it. The code should work, thats important.
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Q1. LLD round to design Chess.
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Q1. Hiring manager round. Grilling on resume and past experience questions
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Maths and communication based questions

Estimate and SQL and coding was there