Mentor Graphics Intern Interview Questions and Answers

60mins test duration

Q1. What are Linux commands
Ans. 
Linux commands are instructions given to the operating system to perform specific tasks or operations.
• Linux commands are case-sensitive

• Commands are typically entered in the terminal

• Common commands include ls (list files), cd (change directory), mkdir (make directory)

• Commands can be combined with options and arguments for more specific actions
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Q2. What is virtualization concept
Ans. 
Virtualization is the process of creating a virtual version of a device or resource, such as a server, storage device, network or operating system.
• Virtualization allows multiple virtual instances to run on a single physical machine

• It helps in optimizing resources and improving efficiency

• Examples include VMware for server virtualization, VirtualBox for desktop virtualization
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Q1. SQL queries and differences b/w delete and truncate
Ans. 
Delete and truncate are SQL commands used to remove data from a table, but with key differences.
• DELETE is a DML command used to remove specific rows from a table based on a condition.

• TRUNCATE is a DDL command used to remove all rows from a table, resetting auto-increment values.

• DELETE can be rolled back, while TRUNCATE cannot be rolled back.

• DELETE triggers ON DELETE triggers, while TRUNCATE does not trigger any trigger...read more
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Q2. What is cloud and aws
Ans. 
Cloud computing is the delivery of computing services like servers, storage, databases, networking, software, analytics, and intelligence over the internet.
• AWS (Amazon Web Services) is a popular cloud computing platform offered by Amazon.

• Cloud computing allows users to access resources on-demand without the need for physical infrastructure.

• AWS provides a wide range of services such as EC2 (Elastic Compute Cloud), S3 (S...read more
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Easy - Medium Leetcode

Logical reasoning questions was there

Q1. Tell me about yourself? From which institute you have done your schooling and college? What are your strengths and weaknesses? How much time did it took to come to the office?
Ans. 
I am a dedicated and hardworking individual with a strong educational background. I completed my schooling at XYZ School and my college at ABC University.
• Schooling: XYZ School

• College: ABC University

• Strengths: Strong work ethic, excellent communication skills, ability to work well in a team

• Weaknesses: Sometimes too detail-oriented, can be overly critical of my own work

• Time to office: 30 minutes
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Q1. Design a ridesharing service
Ans. 
A ridesharing service connecting drivers with passengers for convenient and affordable transportation.
• Allow users to request rides through a mobile app

• Match drivers with passengers based on location and destination

• Provide estimated arrival times and fare estimates

• Implement a rating system for drivers and passengers

• Offer options for shared rides to reduce costs
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Easy to Medium level DSA questions, Some Aptitude Questions

Q1. Array+HashMap based question, Difficulty : Easy
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Q2. Binary Search question, Difficulty : Medium
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Q1. LinkedList Question (Difficulty : Easy)
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Q2. Recursion+Backtracking Question (Difficulty : Medium)
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Round duration - 60 minutes
Round difficulty - Medium

The round was technical round and it was held on google meet around 1 pm

Q1. 
Maximum Sum Rectangle Problem
Given an M x N matrix of integers ARR, your task is to identify the rectangle within the matrix that has the greatest sum of its elements.
Input:
The first line of input co...read more
Ans. Brute force
In this approach, we'll try to consider each rectangle that can be formed using elements of the array. To do this we fix (X1,Y1) coordinates of starting vertex and iterate through the matrix for every pair (X2,Y2) as the coordinates of ending vertex. Now we have a rectangle with coordinates (X1,Y1), (X1,Y2), (X2,Y1) and (X2,Y2).
We'll find the sum of elements within this rectangle and compare it with MAXSUM. ...read more
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Round duration - 60 minutes
Round difficulty - Medium

It was managerial round and took place around 3 pm

Q1. 
Infix to Postfix Conversion
You are provided with a string EXP which represents a valid infix expression. Your task is to convert this given infix expression into a postfix expression.
Explanation:
An i...read more
Ans. Stack
We will scan the expression from left to write and if we encounter an operand we will append it to our answer. If we encounter an operator we will pop all the operators with equal or higher precedence and append them to our answer. And push the current operator. In the end, we will empty the stack.
Order of precedence = [ ‘^’, ‘*’ and ‘/’, ‘+’ and ‘-’, ‘(’, ‘)’]
Order of precedence [ link ]
The algorithm will be-
1. ANS ...read more
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