DMG MORI Software Developer Intern Interview Questions and Answers

Q1. System Design questions
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Q2. SQL theory & pgm questions
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Q3. Python programs
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Q4. Normalization Pgms
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Quantiative Aptitude

Q1. Questions related to basic DSA, Searching, sorting, SQL Queries based on aggregate functions, Basic puzzle (GFG)
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Q1. Resume based, Discussion about projects mentioned on the resume.
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Q1. Strength, Weakness,
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Q1. Basic questions on what you have mentioned in resume , design patterns , reactjs questions , explain your project
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Q1. By when can u join, hr told me they shared my resume with multiple managers and waiting for it to be shortlisted
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Q1. Acid, SQL vs nosql, react based, asynchronous working of js, event loop, etc. How will u design a matrimony site such that search query will contain multiple preferences - age, height, income, etc (say 100...read more
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Q2. How to implement any one of acid property.
Ans. 
To implement ACID property, use transactions to ensure atomicity, consistency, isolation, and durability of data.
• Use transactions to group related database operations together.

• Ensure that all operations within a transaction are completed successfully or none of them are.

• Maintain consistency by enforcing data integrity constraints.

• Isolate transactions to prevent interference from other transactions.

• Ensure durability by ...read more
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Q1. Js output questions. A recursion based coding problem. (Easy-medium)
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Q2. Was asked to develop an ui but i told the interviewer I'm more into backend so she asked me some backend questions after this. Didn't have to solve the ui task.
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Q3. I answered almost all questions.
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Q1. Impliment counter using closure in js
Ans. 
Implement a counter using closure in JavaScript.
• Create a function that returns another function which increments a counter variable.

• The counter variable should be defined in the outer function's scope and only accessible to the inner function.

• Each time the inner function is called, increment the counter variable and return its value.
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Q2. Explain promises, promise.all(), impliment binary search
Ans. 
Promises are objects representing the eventual completion or failure of an asynchronous operation. promise.all() is a method that takes an array of promises and returns a single promise that resolves when all of the promises have resolved.
• Promises are used in JavaScript to handle asynchronous operations.

• promise.all() takes an array of promises and returns a single promise that resolves when all promises in the array ha...read more
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Q1. Questions on kafka, cache invalidation, diff b/w authentication and authorization
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Some database questions,some java questions .

Q1. What is the difference between javascript and jQuery.
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Q2. Define different types of join
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Q3. Define multithreading concept and exception handling.
Ans. 
Multithreading allows multiple threads to run concurrently, while exception handling deals with errors in a program.
• Multithreading involves running multiple threads simultaneously to improve performance and responsiveness.

• Threads share the same memory space but have their own program counter and registers.

• Exception handling is a mechanism to handle errors or exceptional situations in a program.

• It helps prevent the prog...read more
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Round duration - 75 minutes
Round difficulty - Medium

Test Comprises of 3 coding questions and some MCQs

Round duration - 60 minutes
Round difficulty - Medium

2 coding questions of (1 easy and 1 medium level) on hackerrank code-pair with the Interviewer

Round duration - 60 minutes
Round difficulty - Easy

This Round was based on CS fundamentals and One coding question was there as a Code-pair.

Q1. 
Next Greater Element Problem Statement
Given a list of integers of size N, your task is to determine the Next Greater Element (NGE) for every element. The Next Greater Element for an element X is the firs...read more
Ans. 
Find the Next Greater Element for each element in a list of integers.
• Iterate through the list of integers from right to left.

• Use a stack to keep track of elements whose NGE is yet to be found.

• Pop elements from the stack until a greater element is found or the stack is empty.

• Assign the NGE as the top element of the stack or -1 if the stack is empty.
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