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3M Full Stack Developer Interview Questions and Answers
3M Full Stack Developer Interview Experiences
1 interview found
Anonymous
I applied via Recruitment Consulltant and was interviewed in Dec 2024. There was 1 interview round.
(2 Questions)
- Q1. Top frequent element
- Ans.
Identify the most frequently occurring element in an array using efficient algorithms.
Use a hash map to count occurrences of each element. Example: For [1, 2, 2, 3], count becomes {1: 1, 2: 2, 3: 1}.
Iterate through the hash map to find the element with the highest count. In the example, 2 is the most frequent.
Consider edge cases: empty arrays return null, arrays with all unique elements return any element.
For large dat...
- Q2. SQL query to remove duplicates
- Ans.
Use SELECT DISTINCT to remove duplicates from a table in SQL.
Use SELECT DISTINCT to retrieve unique rows from a table.
For example, SELECT DISTINCT column_name FROM table_name;
Another way is to use GROUP BY with aggregate functions to remove duplicates.
For example, SELECT column_name, COUNT(*) FROM table_name GROUP BY column_name;
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Interview questions from similar companies
Sachin Kumawat
Selected
Basic aptitude questions.
(1 Question)
- Q1. Puzzles, Linked list
(1 Question)
- Q1. Hobbies, Family background
Selected
Coding, Maths, Reasoning etc
(1 Question)
- Q1. Technical questions related to programming languages.
(1 Question)
- Q1. Environment and salary etc
VIGNESHWARAN V
(3 Questions)
- Q1. Basic family and behaviour
- Q2. How is your strength?
- Ans.
My strength lies in my problem-solving skills, adaptability, and strong communication, which help me excel in software development.
Problem-solving: I enjoy tackling complex coding challenges, like optimizing algorithms for better performance.
Adaptability: I quickly learn new technologies, demonstrated when I transitioned from Java to Python for a project.
Strong communication: I effectively collaborate with cross-functi...
- Q3. What is family background?
- Ans.
Family background refers to the social, economic, and cultural environment in which a person is raised.
Includes parents' education levels, e.g., a parent with a PhD may influence academic aspirations.
Considers socio-economic status, such as growing up in a wealthy family vs. a low-income household.
Cultural influences, like traditions and values passed down, shape personal beliefs and behaviors.
Family structure, e.g., s...
(1 Question)
- Q1. Mostly about .Net, AWS, Angular
(1 Question)
- Q1. Mostly about AWS, .Net
(1 Question)
- Q1. Behavioral Round + Salary Discussion
Selected
I appeared for an interview before Feb 2024.
The authentication related questions and architecture wise too.
Interview Preparation Tips
Selected
I applied via Job Portal and was interviewed before Jun 2023. There were 2 interview rounds.
Quite reasonable and moderate level
Moreover related to apec
I appeared for an interview in Mar 2025, where I was asked the following questions.
- Q1. Questions from oops concepts
- Q2. Questions from multi threading
(2 Questions)
- Q1. Explain runtime polymorphism used in your project
- Q2. How do you do authentication and authorisation in your java spring boot app
Skills evaluated in this interview
Junior Software Developer Interview Questions & Answers
Wistron
Shravya Poojary
posted on 3 Jun 2024
I applied via Approached by Company and was interviewed in May 2024. There were 2 interview rounds.
It was 3 rounds of aptitude test. They give us back to back test.
(1 Question)
- Q1. About personal details
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