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Use a HashSet to remove duplicate characters from an array of strings in Java.
Create a HashSet to store unique characters.
Iterate through each string in the array and convert it to a char array.
Add each character to the HashSet, as it will automatically remove duplicates.
Convert the HashSet back to a string array to get the result.
posted on 20 May 2022
I applied via Naukri.com and was interviewed in Apr 2022. There was 1 interview round.
posted on 12 Jun 2024
posted on 14 Mar 2024
I applied via Referral and was interviewed before Mar 2023. There was 1 interview round.
I was interviewed in May 2022.
Round duration - 120 Minutes
Round difficulty - Easy
Given a list of rectangles, where each rectangle is represented by an array of four integers indicating its bottom-left and top-right corners, calculate the total area covered b...
Calculate total area covered by a list of rectangles on a plane.
Iterate through each rectangle and calculate its area
Check for overlapping areas between rectangles
Sum up the total area covered by all rectangles
Round duration - 60 Minutes
Round difficulty - Medium
Oops concepts and 1 DSA problem
You are provided with a string, termed as DIGIT_PATTERN
, which consists solely of digits. The objective is to identify the first digit that repeats in the sequence. If there's no...
Identify the first repeating digit in a given string of digits.
Iterate through the string and keep track of seen digits using a set.
Return the first digit that repeats, or -1 if no digit repeats.
Time complexity: O(n), where n is the length of the input string.
Round duration - 60 Minutes
Round difficulty - Medium
Firstly Some general questions and then suddenly a cosing question with modifications
Given an input string STR
, generate and print all possible permutations of the string.
str
All permutations of the input string, each on a new line.
Generate and print all possible permutations of a given input string.
Use recursion to generate all permutations by swapping characters in the string.
Maintain a visited array to keep track of characters already used in a particular permutation.
Print each permutation as it is generated.
Handle duplicate characters by skipping swapping if the character is already in the current position.
Tip 1 : You should be perfect in what you know
Tip 2 : Prepare atleast DSA standard questions very well
Tip 3 : Don't ignore OOPs, they are asked very frequently.
Tip 1 : Add good projects
Tip 2 : Must mention all your coding profiles and github where you worked.
I applied via Campus Placement and was interviewed before Feb 2022. There were 4 interview rounds.
posted on 4 Jul 2024
I applied via Referral and was interviewed in Jan 2024. There were 3 interview rounds.
Normal 3 leetcode medium questions
Machine coding round to design tail -f
posted on 21 Jan 2025
Easy medium to hard medium
Questions on array , linked list
posted on 26 Feb 2025
I was interviewed before Feb 2024.
General Aptitude Test.
One-one mapping is a relationship between two sets where each element of one set is associated with exactly one element of the other set.
Each element in the first set maps to exactly one element in the second set.
No two elements in the first set map to the same element in the second set.
Example: Mapping employee IDs to employee names in a database.
Inheritance is a concept in object-oriented programming where a class inherits properties and behaviors from another class.
Allows a class to inherit attributes and methods from another class
Promotes code reusability and reduces redundancy
Creates a parent-child relationship between classes
Derived class can override or extend the functionality of the base class
Example: Class 'Car' can inherit from class 'Vehicle' and inh...
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