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M-I SWACO Interview Questions and Answers

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I applied via Job Fair and was interviewed before Jun 2021. There were 3 interview rounds.

Round 1 - Resume Shortlist 
Pro Tip by AmbitionBox:
Keep your resume crisp and to the point. A recruiter looks at your resume for an average of 6 seconds, make sure to leave the best impression.
View all tips
Round 2 - Technical 

(1 Question)

  • Q1. HAC Classification, Basics of Safety
Round 3 - Technical 

(1 Question)

  • Q1. Incident investigation, Basics of Safety, Leadership skills

Interview Preparation Tips

Interview preparation tips for other job seekers - Be confident with your resume. Leadership skill is important

I applied via Naukri.com and was interviewed before Sep 2019. There were 3 interview rounds.

Interview Questionnaire 

2 Questions

  • Q1. Domain related stuffs.
  • Q2. Framework related questions commonly on the configuration part

Interview Preparation Tips

Interview preparation tips for other job seekers - Be confident, share your knowledge . If you don't know the exact answers try to answer some relative things if you know.

I applied via Campus Placement and was interviewed before Jul 2021. There were 4 interview rounds.

Round 1 - Resume Shortlist 
Pro Tip by AmbitionBox:
Keep your resume crisp and to the point. A recruiter looks at your resume for an average of 6 seconds, make sure to leave the best impression.
View all tips
Round 2 - Group Discussion 

Topic was WHICH COMES FIRST? SAFETY, PRODUCTION OR QUALITY?

Round 3 - Technical 

(1 Question)

  • Q1. 1. Subject based questions 2. Situational questions 3. Common sense question
Round 4 - HR 

(5 Questions)

  • Q1. Behaviourial assesment & financial Negotiations
  • Q2. Where do you want to see yourself after 5 years?
  • Q3. What will be the extra efforts from your side to keep the organisation high
  • Q4. How long will you stay with us
  • Q5. Will you interested in higher education

Interview Preparation Tips

Interview preparation tips for other job seekers - Keep yourself ready for the war. Deep subject knowledge & being smart is the key

I applied via Walk-in and was interviewed in Feb 2021. There was 1 interview round.

Interview Questionnaire 

4 Questions

  • Q1. Why do you want to join our company?
  • Q2. Can you face challenges ?
  • Q3. Are you comfortable with the job profile?
  • Q4. Are you suitable for field work?

Interview Preparation Tips

Interview preparation tips for other job seekers - Be Confined and answer and don't be nervous, try to give positive Answer

I appeared for an interview before Sep 2020.

Round 1 - Coding Test 

(1 Question)

Round duration - 180 Minutes
Round difficulty - Medium

Round was held in the morning at 10 am.

  • Q1. 

    M - Coloring Problem Statement

    Given an undirected graph with 'N' nodes in the form of an adjacency matrix and an integer 'M', determine if it is possible to color the vertices of the graph using at most ...

  • Ans. 

    The problem involves determining if a given graph can be colored with at most 'M' colors without adjacent vertices sharing the same color.

    • Create a function that takes the adjacency matrix, number of nodes 'N', and maximum number of colors 'M' as input.

    • Implement a graph coloring algorithm such as backtracking or greedy coloring to check if the graph can be colored with at most 'M' colors.

    • Check if adjacent vertices have ...

  • Answered by AI
Round 2 - Face to Face 

(1 Question)

Round duration - 40 Minutes
Round difficulty - Medium

The round was held in the evening

  • Q1. 

    Trie Data Structure Implementation

    Design and implement a Trie (prefix tree) to perform the following operations:

    • insert(word): Add a string "word" to the Trie.
    • search(word): Verify if the string "w...
  • Ans. 

    Implement a Trie data structure to insert, search, and check for prefixes in strings.

    • Create a TrieNode class with children and isEndOfWord attributes.

    • Implement insert, search, and startsWith methods in the Trie class.

    • Use a Trie to efficiently store and search for strings based on prefixes.

    • Example: insert 'apple', search 'apple' returns true, startsWith 'app' returns true, search 'app' returns false.

  • Answered by AI
Round 3 - HR 

Round duration - 10 Minutes
Round difficulty - Easy

Was held in the morning around 9 am

Interview Preparation Tips

Professional and academic backgroundI completed Computer Science Engineering from TIET - Thapar Institute of Engineering And Technology. I applied for the job as SDE - 1 in NoidaEligibility criteriaAbove 7 CGPASamsung interview preparation:Topics to prepare for the interview - OOPS, Algorithms, Operating System, DBMS, Data StructuresTime required to prepare for the interview - 2 MonthsInterview preparation tips for other job seekers

Tip 1 : Focus on graphs, most questions are from this topic
Tip 2 : Prepare well about the projects you mention in your resume
Tip 3 : Do not fill the resume with too many things. Keep it simple

Application resume tips for other job seekers

Tip 1 : Have 2-3 projects on resume. But also be prepared to answer questions related to the projects.
Tip 2 : Do not mention too many things. Keep it short and simple

Final outcome of the interviewSelected

Skills evaluated in this interview

I appeared for an interview before Sep 2020.

Round 1 - Coding Test 

Round duration - 60 minutes
Round difficulty - Easy

This was coding round and was conducted on Cocubes platform. It is not IDE but kind of white board coding platform. C/C++, Java and Python were only allowed languages.

Round 2 - Coding Test 

Round duration - 30 minutes
Round difficulty - Easy

This was pen and paper round. Total 40 shortlisted candidates were grouped into 8 groups (each of 5). Each group was given a coding question which they have to solve on paper and explain it to the recruiter. 2 to 3 from each group were selected for the next round.

Round 3 - Face to Face 

(1 Question)

Round duration - 60 minutes
Round difficulty - Easy

This was general face to face Data Structures and Algorithms based round.

  • Q1. How do you perform a spiral order traversal of a binary tree? Please provide an explanation or code to print the binary tree in spiral order.
  • Ans. 

    Spiral order traversal of a binary tree involves printing nodes level by level alternating between left to right and right to left.

    • Start by pushing the root node into a queue.

    • While the queue is not empty, pop a node, print its value, and push its children into the queue.

    • For each level, alternate between printing nodes from left to right and right to left.

    • Repeat until all nodes are printed in spiral order.

  • Answered by AI
Round 4 - HR 

Round duration - 45 minutes
Round difficulty - Easy

It was the last round.

Interview Preparation Tips

Professional and academic backgroundI completed Electronics & Communication Engineering from Veermata Jijabai Technological Institute. I applied for the job as SDE - 1 in UlhasnagarEligibility criteriaCGPA above 7.5 Samsung interview preparation:Topics to prepare for the interview - Only Data Structures and Algorithms.Time required to prepare for the interview - 3 monthsInterview preparation tips for other job seekers

Be real during the interview and don’t show off. Also, practice Data Structures and Algorithms based problems as only through practice you will be able to solve questions quickly during the interview. Also prepare for theory subjects like Object-Oriented Programming System, Database Management System, Computer networks, etc.

Application resume tips for other job seekers

Keep your resume simple. Prefer LaTeX. Don't use colourful templates. They are too common and very unprofessional. Keep it black and white and keep your content richer. Keep it of 1 page and 2 pages only if you have achieved a lot. Don’t use fillers. Any unwanted information on the resume leaves a bad impact on the interviewer.

Final outcome of the interviewSelected

Skills evaluated in this interview

I appeared for an interview before Jan 2021.

Round 1 - Coding Test 

(3 Questions)

Round duration - 120 Minutes
Round difficulty - Medium

This was an online coding round where we had 3 questions to solve under 120 minutes. The questions were of medium to hard difficulty level.

  • Q1. 

    Minimum Time in Wormhole Network

    Determine the minimum time required to travel from a starting point to a destination point in a two-dimensional coordinate system, considering both direct movement and the...

  • Ans. 

    Find the minimum time to travel from a starting point to a destination point using direct movement and wormholes.

    • Calculate the time taken for direct movement from source to destination.

    • Consider using each wormhole to see if it reduces the total travel time.

    • Choose the path with the minimum total time to reach the destination.

  • Answered by AI
  • Q2. 

    Substrings Differ by One Problem Statement

    Ninja needs help in a battle against the string man. Given two strings, 'S' and 'T', the task is to find the number of substrings in 'S' that differ from some su...

  • Ans. 

    The task is to find the number of substrings in 'S' that differ from some substrings of 'T' by exactly one character.

    • Iterate through all substrings of 'S' and 'T' and compare them character by character to find the ones that differ by exactly one character.

    • Use nested loops to generate all possible substrings of 'S' and 'T'.

    • Count the number of substrings that differ by exactly one character and return the total count.

  • Answered by AI
  • Q3. 

    Power of Two Problem Statement

    Determine whether a given integer N is a power of two. Return true if it is, otherwise return false.

    Explanation

    An integer 'N' is considered a power of two if it can be e...

  • Ans. 

    Check if a given integer is a power of two or not.

    • Check if the given integer is greater than 0.

    • Check if the given integer has only one bit set in its binary representation.

    • Return true if the above conditions are met, else return false.

  • Answered by AI
Round 2 - Face to Face 

(4 Questions)

Round duration - 60 Minutes
Round difficulty - Medium

This round had 2 questions related to DSA where I was first expected to explain my approaches and then discuss the time and space complexities of my solution. After that , I was asked some core concepts related to OS.

  • Q1. 

    Reverse Linked List Problem Statement

    Given a singly linked list of integers, return the head of the reversed linked list.

    Example:

    Initial linked list: 1 -> 2 -> 3 -> 4 -> NULL
    Reversed link...
  • Ans. 

    Reverse a singly linked list of integers and return the head of the reversed linked list.

    • Iterate through the linked list and reverse the pointers to point to the previous node instead of the next node.

    • Use three pointers - prev, current, and next to reverse the linked list in O(N) time and O(1) space complexity.

    • Update the head of the reversed linked list as the last node encountered during reversal.

  • Answered by AI
  • Q2. 

    Cycle Detection in Undirected Graph Problem Statement

    You are provided with an undirected graph containing 'N' vertices and 'M' edges. The vertices are numbered from 1 to 'N'. Your objective is to determi...

  • Ans. 

    Detect cycles in an undirected graph.

    • Use Depth First Search (DFS) to detect cycles in the graph.

    • Maintain a visited array to keep track of visited vertices.

    • If a visited vertex is encountered again during DFS, a cycle exists.

    • Check for cycles in each connected component of the graph.

    • Example: For input N=3, Edges=[[1, 2], [2, 3], [1, 3]], output is Yes.

  • Answered by AI
  • Q3. What are the differences between a mutex and a semaphore?
  • Ans. 

    Mutex is used for exclusive access to a resource by only one thread at a time, while semaphore can allow multiple threads to access a resource simultaneously.

    • Mutex is binary semaphore with ownership, used for mutual exclusion.

    • Mutex is typically used to protect critical sections of code.

    • Semaphore is a signaling mechanism, used for synchronization between multiple threads.

    • Semaphore can have a count greater than 1, allowi...

  • Answered by AI
  • Q4. What is meant by multitasking and multithreading in operating systems?
  • Ans. 

    Multitasking refers to the ability of an operating system to run multiple tasks concurrently, while multithreading involves executing multiple threads within a single process.

    • Multitasking allows multiple processes to run simultaneously on a single processor, switching between them quickly to give the illusion of parallel execution.

    • Multithreading involves breaking a process into multiple threads that can be executed ind...

  • Answered by AI
Round 3 - Face to Face 

(4 Questions)

Round duration - 60 Minutes
Round difficulty - Medium

This round had 2 Algorithmic questions wherein I was supposed to code both the problems after discussing their
approaches and respective time and space complexities . After that , I was grilled on some OOPS concepts related to C++.

  • Q1. 

    Trapping Rain Water Problem Statement

    You are given a long type array/list ARR of size N, representing an elevation map. The value ARR[i] denotes the elevation of the ith bar. Your task is to determine th...

  • Ans. 

    Calculate the total amount of rainwater that can be trapped between given elevations in an array.

    • Iterate through the array and calculate the maximum height on the left and right of each bar.

    • Calculate the amount of water that can be trapped at each bar by taking the minimum of the maximum heights on the left and right.

    • Sum up the trapped water at each bar to get the total trapped water for the entire array.

  • Answered by AI
  • Q2. 

    Find The Repeating And Missing Number Problem Statement

    You are provided with an array nums which contains the first N positive integers. In this array, one integer appears twice, and one integer is missi...

  • Ans. 

    Given an array of first N positive integers with one number repeating and one missing, find the repeating and missing numbers.

    • Iterate through the array and keep track of the sum of elements and sum of squares to find the missing and repeating numbers.

    • Use a set to identify the repeating number and calculate the missing number based on the sum of elements.

    • Example: For nums = [1, 2, 3, 4, 4, 5], the repeating number is 4

  • Answered by AI
  • Q3. What is the Diamond Problem in C++ and how can it be resolved?
  • Ans. 

    Diamond Problem in C++ is a common issue in multiple inheritance where a class inherits from two classes that have a common base class.

    • Diamond Problem occurs when a class inherits from two classes that have a common base class, leading to ambiguity in accessing members.

    • It can be resolved in C++ using virtual inheritance, where the common base class is inherited virtually to avoid duplicate copies of base class members.

    • ...

  • Answered by AI
  • Q4. What are friend functions in C++?
  • Ans. 

    Friend functions in C++ are functions that are not members of a class but have access to its private and protected members.

    • Friend functions are declared inside a class with the 'friend' keyword.

    • They can access private and protected members of the class.

    • They are not member functions of the class, but have the same access rights as member functions.

    • Friend functions are useful for implementing operators that are not membe...

  • Answered by AI

Interview Preparation Tips

Eligibility criteriaAbove 7 CGPASamsung interview preparation:Topics to prepare for the interview - Data Structures, Algorithms, System Design, Aptitude, OOPSTime required to prepare for the interview - 4 MonthsInterview preparation tips for other job seekers

Tip 1 : Must do Previously asked Interview as well as Online Test Questions.
Tip 2 : Go through all the previous interview experiences from Codestudio and Leetcode.
Tip 3 : Do at-least 2 good projects and you must know every bit of them.

Application resume tips for other job seekers

Tip 1 : Have at-least 2 good projects explained in short with all important points covered.
Tip 2 : Every skill must be mentioned.
Tip 3 : Focus on skills, projects and experiences more.

Final outcome of the interviewSelected

Skills evaluated in this interview

I applied via Approached by Company and was interviewed before Feb 2021. There were 3 interview rounds.

Round 1 - Technical 

(1 Question)

  • Q1. PLC, VFD, sensors, robot knowledge, Any language like C++, Python is additional advantage, mobile industry knowledge could also provide advantage
Round 2 - Technical 

(1 Question)

  • Q1. About yourself followed by one more technical round basically asking technical part from previous company
Round 3 - HR 

(3 Questions)

  • Q1. What are your salary expectations?
  • Q2. Share details of your previous job.
  • Q3. Tell me about yourself.

Interview Preparation Tips

Interview preparation tips for other job seekers - As a maintenance engineer if you are from mobile industry you will definitely get priority, other than this they require PLC and robotic knowlegde acquired professional for the testing equipment which are generally using drivers, motors, plc and programming part

I applied via Walk-in and was interviewed in Jun 2021. There was 1 interview round.

Interview Questionnaire 

1 Question

  • Q1. Company related questions

Interview Preparation Tips

Interview preparation tips for other job seekers - I do my level best & hard work

Interview Questionnaire 

1 Question

  • Q1. Tell me about yourself

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M-I SWACO Reviews and Ratings

based on 20 reviews

3.4/5

Rating in categories

3.0

Skill development

2.5

Work-life balance

3.4

Salary

2.8

Job security

3.0

Company culture

2.9

Promotions

3.4

Work satisfaction

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