Ilensys Technologies Mechanical Engineer Interview Questions and Answers

Q1. About work experience, lifestyle, hobbies,
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Q2. Tech round with project lead
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20 questions in 20 minutes

Was 1 hr with a simple question from leetcode

Q1. Implement reverse Linked list
Ans. 
Reverse a linked list
• Create a new linked list to store the reversed elements

• Traverse the original linked list and insert each node at the beginning of the new list

• Update the head of the new list as the last node of the original list
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Q2. Project Explanation(from resume)
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Q1. Why we should select you?
Ans. 
I am a dedicated and hardworking individual with relevant skills and experience for the role.
• I have completed relevant coursework in the field

• I have previous internship experience in a similar role

• I possess strong communication and teamwork skills
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Q2. Are you willing to relocate?
Ans. 
Yes, I am open to relocating for the right opportunity.
• I am open to relocating for the right opportunity

• I am flexible and willing to move for the internship

• I understand the importance of being open to relocation for career growth
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Q1. Why do u want to leave your previous company
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Q2. When can you join
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Q1. Introduction and CV based
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Q1. Explain about real-time project scenario
Ans. 
Real-time project scenario involves monitoring and controlling processes as they happen, ensuring timely responses and adjustments.
• Real-time data collection and analysis

• Immediate feedback and decision-making

• Continuous monitoring and optimization

• Examples: real-time monitoring of manufacturing processes, real-time traffic management systems
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Q1. Daily activities
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Round duration - 50 minutes
Round difficulty - Medium

Round duration - 20 minutes
Round difficulty - Medium

Q1. 
Pair Sum Problem Statement
You are given an integer array 'ARR' of size 'N' and an integer 'S'. Your task is to find and return a list of all pairs of elements where each sum of a pair equals 'S'.
Note:
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Ans. 
Given an array and a target sum, find pairs of elements that add up to the target sum.
• Iterate through the array and for each element, check if the complement (target sum - current element) exists in a hash set.

• If the complement exists, add the pair to the result list. Otherwise, add the current element to the hash set.

• Sort the pairs based on the first element and then the second element to meet the required output form
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Round duration - 20 minutes
Round difficulty - Easy

Round duration - 40 minutes
Round difficulty - Hard

Q1. Can you provide an example of how to use pointers in C/C++ and discuss different concepts related to them?
Ans. 
Pointers in C/C++ are variables that store memory addresses. They are used to manipulate memory directly and improve performance.
• Pointers are declared using an asterisk (*) before the variable name.

• Pointers can be used to dynamically allocate memory using functions like malloc() and free().

• Pointers can be used to pass variables by reference to functions.
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