Tagit Pte Senior Product Engineer Interview Questions and Answers

Q1. Java related ,core java and collection ,constructor, oops.
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Q1. Oops concepts and projects
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Q2. Collections, multithreading
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Q1. Questions were related to tree traversal (level-order) and strings (anagram)
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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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Q1. The interviewer asked Basic SQL and Linux OS-related questions.
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Q1. The interviewer asked questions regarding projects and experience.
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Q2. The interviewer asked some aptitude and logical reasoning questions.
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Q1. Salary negotiations.
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Normal 3 leetcode medium questions

Machine coding round to design tail -f

Q1. Questions on internal working of os
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Q2. Questions on projects
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Easy medium to hard medium

Questions on array , linked list

Q1. Oops ,dbms,cn,operating system
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Q1. Easy question of hr round
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General Aptitude Test.

Q1. One to one discussion about OOPS, Hibernate, Java.
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Q2. What is one-one mapping.
Ans. 
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.
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Q3. Explain Inheritance
Ans. 
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...read more
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Q4. Select 2nd top salary.
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