Dell Senior Data Engineer Interview Questions and Answers

A standard aptitude test consisting of multiple-choice questions that needed to be completed within a specific time frame was administered. It has been four years, so I do not recall the details.

Samsung's coding test consists of solving a single complex question over a duration of four hours. The time complexity typically holds less significance; some questions can even be tackled with O(n^3) complexity. The emphasis is on our understanding of the problem statement and our approach to coding the solution. Since the solution tends to be quite extensive, requiring substantial code, optimization is not generally the primary focus. It is important to offer a reasonable solution. Topics such as graphs, binary search, and object-oriented programming are commonly featured in the test.

Q1. It was a technical discussion round. Usually Java & Android are a plus to have because Samsung focuses on it a lot. But, becasue I was experienced in Python, Django and Machine Learning instead, I asked i...read more
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Q2. I remember only 1 question from Data Structures which is : Detecting a cycle in Linked list. I gave a solution to that. After that, I was asked to write a proof why does this concept works. After soem thin...read more
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Q3. There were a lot of questions on Operating Systems like on Deadlock, Partitionn and Scheduling related questions. At the end, I was given a small problem with jobs coming in a queue at certain timestamps, ...read more
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Q1. I'll never forget this interview. It was a roast session 😂 Interviewer roasted the hell out of me. At that time, I remembered I read about Stress Interviews in the management subject and that exactly was ...read more
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Skil set for My relevant job update

Communication discussion

Q1. About My profile and knowledge
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Q2. About My attitude and experience
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Q1. Excel formula and macro MS word and PowerPoint dashboard advanced Excel and power bi
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Q1. How to design apis
Ans. 
Designing APIs involves defining endpoints, request/response formats, authentication, versioning, and documentation.
• Define clear and consistent endpoints for different functionalities

• Design request and response formats that are easy to understand and work with

• Implement authentication mechanisms to secure the API

• Consider versioning to support backward compatibility

• Provide comprehensive documentation for developers to ea
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Q2. How to structure databases for data collection
Ans. 
Structure databases by identifying data entities, relationships, and attributes.
• Identify data entities (e.g. customers, products) and their attributes

• Define relationships between entities (e.g. one-to-many, many-to-many)

• Normalize data to reduce redundancy and improve data integrity

• Use primary keys to uniquely identify each record

• Consider indexing for faster data retrieval
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Q1. In detail questions related to the exp
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Q2. In detail hr related question
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Tell about AC industry

Q1. Move zeros to end?
Ans. 
Move all zeros in an array of strings to the end while maintaining the order of non-zero elements.
• Iterate through the array and move all zeros to the end while keeping the order of non-zero elements.

• Use two pointers approach to swap elements in-place.

• Example: Input: ['a', 'b', 'c', '0', 'd', '0'], Output: ['a', 'b', 'c', 'd', '0', '0']
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Q2. WHat are AWS services?
Ans. 
AWS services are cloud computing services provided by Amazon Web Services.
• Compute services (e.g. EC2, Lambda)

• Storage services (e.g. S3, EBS)

• Database services (e.g. RDS, DynamoDB)

• Networking services (e.g. VPC, Route 53)

• Machine learning services (e.g. SageMaker)

• Analytics services (e.g. Redshift, Athena)
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Q3. What is dynamodb?
Ans. 
DynamoDB is a fully managed NoSQL database service provided by AWS.
• Fully managed NoSQL database service

• Scalable and high-performance

• Supports key-value and document data models

• Automatically replicates data across multiple Availability Zones for high availability
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Q1. How good are you at stress handling situations?
Ans. 
I am very good at handling stress situations, remaining calm and focused under pressure.
• I have experience working on high-pressure projects with tight deadlines.

• I am able to prioritize tasks effectively and stay organized during stressful situations.

• I have developed strong problem-solving skills that help me navigate stressful scenarios.

• I am able to communicate effectively with team members and stakeholders to manage s...read more
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Q2. Why daikin eloaborate this?
Ans. 
Daikin may elaborate on a topic to provide more detailed information or explanation.
• To provide a better understanding of a complex concept or product

• To address potential questions or concerns from customers

• To showcase the company's expertise and knowledge in the industry
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Q1. What is join in sql
Ans. 
Join in SQL is used to combine rows from two or more tables based on a related column between them.
• Join is used to retrieve data from multiple tables based on a related column

• Types of joins include INNER JOIN, LEFT JOIN, RIGHT JOIN, and FULL JOIN

• Example: SELECT * FROM table1 INNER JOIN table2 ON table1.column = table2.column
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Q2. What is primary key
Ans. 
Primary key is a unique identifier for each record in a database table.
• Primary key ensures each record in a table is uniquely identified

• It must contain unique values and cannot have NULL values

• Primary key can be a single column or a combination of columns

• Example: 'ID' column in a 'Users' table can be a primary key
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Q1. Bdd framework oops
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Q1. Asked to create a power bi dashboard
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Q1. Had coding test on SQL and Python
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Easy to attempt and creak the test

Q1. About yourself, c basic questions, about your project
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Q1. About yourself, about company, about location
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