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Freecharge Software Developer Interview Questions and Answers
Freecharge Software Developer Interview Experiences
4 interviews found
Anonymous
I applied via Job Portal and was interviewed in Dec 2024. There was 1 interview round.
(1 Question)
- Q1. Find Target Element in a rotating sorted Array.
- Ans.
Search for target element in a rotated sorted array.
Use binary search to find the pivot point where rotation happens.
Divide the array into two subarrays and perform binary search on the appropriate subarray.
Handle cases where the target element is on the left or right side of the pivot.
(2 Questions)
- Q1. Node.js concepts
- Q2. Schema design
(1 Question)
- Q1. Basics on Node.js
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I applied via LinkedIn and was interviewed in Feb 2024. There was 1 interview round.
(1 Question)
- Q1. Sort array of cards in color red , blue,green
- Ans.
Sort array of cards in red, blue, green colors.
Use a custom sorting function to sort the array based on color order.
Assign a numerical value to each color (e.g. red: 0, blue: 1, green: 2) and sort based on these values.
Implement a sorting algorithm like bubble sort or quicksort to rearrange the array based on color order.
Skills evaluated in this interview
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I appeared for an interview before Sep 2020.
(1 Question)
Round duration - 90 minutes
Round difficulty - Easy
Nice environment
- Q1.
Zigzag Traversal of Binary Tree
Given a binary tree with integer values in its nodes, your task is to print the zigzag traversal of the tree.
Note:
In zigzag order, level 1 is printed from left to right... - Ans.
Implement a function to print the zigzag traversal of a binary tree.
Traverse the tree level by level, alternating the direction of traversal for each level.
Use a queue to keep track of nodes at each level.
Print the nodes in zigzag order as per the given pattern.
(2 Questions)
Round duration - 90 minutes
Round difficulty - Medium
Nice Environment
- Q1.
Prime Numbers Identification
Given a positive integer
N, your task is to identify all prime numbers less than or equal toN.Explanation:
A prime number is a natural number greater than 1 that has no po...
- Ans.
Identify all prime numbers less than or equal to a given positive integer N.
Iterate from 2 to N and check if each number is prime
Use the Sieve of Eratosthenes algorithm for better efficiency
Optimize by only checking up to the square root of N for divisors
- Q2. What was the use of DBMS in your project, and how did you handle the problems that arose?
- Ans.
DBMS was used to store and manage data in the project, handled problems by optimizing queries and database design.
Used DBMS to store and manage project data efficiently
Optimized queries for better performance
Designed database schema to handle data effectively
Resolved concurrency issues by implementing proper locking mechanisms
Interview Preparation Tips
Tip 1 : Do atleast 1 good projects
Tip 2 : Practice Atleast 300 Questions
Tip 3 : Should be able to explain your project
Tip 1 : Always be true with the resume
Tip 2 : Do not put false things on resume.
Skills evaluated in this interview
Interview Preparation Tips
Experience: Finally, I got the offer from PayU. I was very Happy. Thanks AmbitionBox for helping me in my preparation
Skills: Algorithm, data structures
College Name: Na
I applied via Referral and was interviewed in Sep 2023. There was 1 interview round.
Asked to write an in memory SQL database. Time was 1.5 hours. I made the mistake of choosing C++ and writing the code to make it very flexible and extensible. This led to me not being able to complete the task in the given time.
Tip: practice LLD round in a high level language like Python or Typescript. Speed is very important.
(1 Question)
- Q1. LLD HLD HM rounds
Blood relation, coding and decoding, number system , percentage
Interview Preparation Tips
I appeared for an interview in Apr 2021.
(3 Questions)
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... - 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.
- Q2.
Longest Palindromic Substring Problem Statement
You are provided with a string
STRof lengthN. The goal is to identify the longest palindromic substring within this string. In cases where multiple palind... - 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
- 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...
- 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.
Interview Preparation Tips
Tip 1 : Have some projects.
Tip 2 : Do a course from Coding Ninjas.
Tip 1 : Keep it short.
Tip 2 : Do not put false things.
Skills evaluated in this interview
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