Unilog Content Solutions ( P) Software Engineer Interview Questions and Answers

Reverse Linked List
Pallindrome of String

Flyover building in team with strength

Round duration - 120 Minutes
Round difficulty - Easy

Q1. 
Rectangle Area Calculation
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...read more
Ans. 
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
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Round duration - 60 Minutes
Round difficulty - Medium

Oops concepts and 1 DSA problem

Q1. 
Bit Set Problem Statement
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...read more
Ans. 
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.
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Round duration - 60 Minutes
Round difficulty - Medium

Firstly Some general questions and then suddenly a cosing question with modifications

Q1. 
Print All Permutations of a String
Given an input string STR, generate and print all possible permutations of the string.
Input:
str
Output:
All permutations of the input string, each on a new line.
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Ans. 
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.
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