Niveus Solutions (Part of NTT Data) Software Developer Interview Questions and Answers

Coding test based on average DSA on hackerearch.

1 to 1 coding with interviewer

Some puzzles were asked more like quizez

Q1. Salary discussion and asked if know anything about company
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Q2. What do you know about our company
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Pattern, string, array

Q1. Merge intervals - lc
Ans. 
Merge overlapping intervals in a list to create a consolidated list of intervals.
• Sort the intervals based on the start time.

• Iterate through the sorted intervals and compare the current interval with the last merged interval.

• If they overlap, merge them by updating the end time of the last merged interval.

• If they don't overlap, add the current interval to the merged list.

• Example: Given intervals [[1,3],[2,6],[8,10],[15,1...read more
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Q2. Trapping rain water
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Q1. Behavioral questions
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Q2. Why do you want to join
Ans. 
I am passionate about creating innovative software solutions and believe your company aligns with my values and goals.
• Passionate about software development

• Believe company aligns with values and goals
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Round duration - 90 minutes
Round difficulty - Easy

The 1st round was online coding + MCQ round. It had 3 sections in total to be solved in 95 mins.
Next comes the technical interview. 
The technical interview lasted for about 45 minutes. It started with a basic introduction. Then, she framed some questions from my resume and projects which I have mentioned. Questions were mainly from Data structure, OS, DBMS, SQL. She told me to rate my data structure skill on a scale of 1 to 5.

Q1. 
Kth Largest Number Problem Statement
Design a data structure to process a stream of numbers and efficiently find the kth largest number at any given point in time.
Explanation:
You will receive a contin...read more
Ans. 
Design a data structure to efficiently find the kth largest number in a stream of numbers.
• Implement a data structure that can store incoming numbers and efficiently retrieve the kth largest number.

• Support addition of numbers and retrieval of the kth largest number.

• Use a priority queue or heap data structure to maintain the k largest numbers in the stream.

• Handle queries of adding numbers and retrieving the kth largest n...read more
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Round duration - 30 minutes
Round difficulty - Easy

The technical interview lasted for about 45 minutes. It started with a basic introduction. Then, she framed some questions from my resume and projects which I have mentioned. Questions were mainly from Data structure, OS, DBMS, SQL. She told me to rate my data structure skill on a scale of 1 to 5.

Q1. 
Binary Search Tree Search Problem
Given a Binary Search Tree (BST) consisting of 'N' nodes, where each node contains some integer data, your task is to determine whether there is a node in the BST whose d...read more
Ans. 
Given a Binary Search Tree, determine if a node with a given integer exists.
• Traverse the BST in a way that compares the current node's data with the given integer 'X'.

• If the current node's data is equal to 'X', return True.

• If the current node's data is less than 'X', move to the right subtree; if greater, move to the left subtree.

• Repeat this process until a match is found or the end of the tree is reached.
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Q2. 
Remove Duplicates Problem Statement
You are given an array of integers. The task is to remove all duplicate elements and return the array while maintaining the order in which the elements were provided.
...read more
Ans. 
Remove duplicates from an array while maintaining order.
• Use a set to keep track of unique elements.

• Iterate through the array and add elements to the set if not already present.

• Convert the set back to an array to maintain order.
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3 coding questions of array string and stack

Round 1 -> 3 easy coding questions (I did all three)
round2 -> 2 coding questions (1 was leetcode's trapping rainwater problem) (Did 1.5)

Q1. SQL query was asked on joins etc
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Q2. What are Microservcies, solid principles, a pattern printing question, oops concepts
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Q1. Designing dbms for a college website
Ans. 
Designing a DBMS for a college website involves creating tables for students, courses, faculty, and more.
• Create tables for students, courses, faculty, departments, etc.

• Establish relationships between tables using foreign keys.

• Include attributes like student ID, course ID, faculty ID, etc.

• Implement normalization to reduce redundancy and improve data integrity.

• Consider implementing views for complex queries or reports.
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Q2. Implement debouncing, create a nodejs server with a get / post api, a puzzle, javascript questions like clousers, let / var / const, event loop, output based questions etc.
Ans. 
Implement debouncing, create a nodejs server with get/post api, and answer JavaScript questions.
• Implement debouncing by using setTimeout and clearTimeout to limit the number of times a function is called.

• Create a nodejs server with Express framework to handle get and post requests.

• Answer JavaScript questions on closures, let/var/const, event loop, and output based questions.

• Provide examples for each concept to demonstr...read more
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In 1st round they will provide a pattern question which you need to solve in 1 hour

Second round as well a coding test, which is a hard level of pattern coding test which you need to solve with in 45 minutes.

Q1. What is arrow function, write code to create a table (table structure will be provided).
Ans. 
Arrow functions are a concise way to write functions in JavaScript.
• Arrow functions are written using the '=>' syntax.

• They do not have their own 'this' keyword.

• They are best suited for non-method functions.

• Example: const add = (a, b) => a + b;
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Q2. Git commands, what are the steps to commit and push code in git.
Ans. 
To commit and push code in Git, you need to stage changes, commit them, and then push to the remote repository.
• Stage changes using 'git add ' or 'git add .' to add all changes

• Commit changes using 'git commit -m 'commit message''

• Push changes to remote repository using 'git push'
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Q3. Mathematics questions and many more.
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Q1. Pattern question
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Q2. Good project knowledge
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Like pattern question

2 basic project for creating and make project

Q1. How to flow your code
Ans. 
Flowing code involves organizing and structuring code in a logical and readable manner.
• Break down the code into smaller functions or modules

• Use meaningful variable and function names

• Follow a consistent coding style and indentation

• Comment code to explain complex logic

• Use version control to track changes and collaborate with others
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Q2. What is the unique functionality in your project.
Ans. 
Our project includes a unique functionality that allows users to customize their own user interface themes.
• Users can choose from a variety of color schemes and layouts to personalize their experience.

• The customization options are saved for each user, so they can easily switch between themes.

• This feature enhances user satisfaction and engagement with the software.
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Q1. Discuss about salary, work culture, politics also
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