Beinex Data Engineer Interview Questions and Answers

Q1. What is index and types of index
Ans. 
An index is a data structure that improves the speed of data retrieval operations in a database.
• Types of indexes include clustered index, non-clustered index, unique index, and composite index.

• Indexes can be created on one or multiple columns in a table.

• Indexes help in quickly locating data without having to scan the entire table.

• Examples of indexes are primary key indexes, foreign key indexes, and secondary indexes.
Answered by AI
Add your answer
Q2. What is SCD and its type
Ans. 
SCD stands for Slowly Changing Dimension, which is a concept used in data warehousing to track changes in data over time.
• SCD Type 1: Overwrites old data with new data, losing historical information.

• SCD Type 2: Keeps multiple versions of the same record, each with a different timestamp.

• SCD Type 3: Maintains separate columns for current and previous values, limiting historical data tracking.

• SCD Type 4: Uses separate hist...read more
Answered by AI
Add your answer
Q3. Tell me the process of data pipeline
Ans. 
Data pipeline is a series of processes that collect, transform, and load data from various sources to a destination for analysis.
• Data ingestion: Collecting data from various sources like databases, APIs, logs, etc.

• Data processing: Cleaning, transforming, and enriching the data to make it usable for analysis.

• Data storage: Storing the processed data in a data warehouse, data lake, or other storage solutions.

• Data analysis...read more
Answered by AI
Add your answer

Q1. What is excel? How it is work.
Ans. 
Excel is a spreadsheet program used for organizing, analyzing, and storing data in tabular format.
• Excel is part of Microsoft Office suite.

• It allows users to create tables, charts, graphs, and perform calculations.

• Data can be entered manually or imported from external sources.

• Formulas and functions can be used to manipulate data.

• Excel is commonly used for financial analysis, budgeting, and data visualization.
Answered by AI
Add your answer
Q2. How to work word?
Ans. 
To work with words, one must have strong typing skills, attention to detail, and knowledge of data entry software.
• Practice typing regularly to improve speed and accuracy.

• Use spell check and grammar tools to ensure accuracy.

• Familiarize yourself with data entry software such as Microsoft Excel.

• Organize and prioritize tasks to efficiently input data.

• Double-check entries for errors before submitting.

• Seek feedback and train...read more
Answered by AI
Add your answer
Q3. How to work in ms excel? Benifit to speak.
Add your answer
Q4. What is microprocessor?
Ans. 
A microprocessor is a small electronic device that functions as the central processing unit of a computer.
• Microprocessors are made up of millions of tiny components like transistors and resistors.

• They execute instructions and perform calculations for various tasks.

• Examples of microprocessors include Intel's Core series and AMD's Ryzen series.
Answered by AI
Add your answer

Basic questions for freshers

More focus on the participation and collective contribution of candidates along with communication skills.

Q1. DSa, DBMS, joins, and other basic c, c++ questions
Add your answer

Q1. Interests hobbies Co-curricular activities and such related questions
Add your answer

Basic questions related to time, distance etc. speed is the most important part for this.

Normal group discussion based on a particular topic

Q1. They will test your basic knowledge in programming language and some coding
Add your answer

Q1. Behavioural questions
Add your answer

Q1. What is the difference between logistic regression and linear regression? How do you decide the threshold?
Ans. 
Logistic regression is used for classification while linear regression is used for regression. Threshold is decided based on the problem.
• Logistic regression predicts the probability of an event occurring, while linear regression predicts a continuous outcome.

• Logistic regression uses a sigmoid function to map the predicted values between 0 and 1.

• Linear regression uses a linear equation to model the relationship between ...read more
Answered by AI
Add your answer
Q2. How do you decide the evaluation metric for a problem?
Ans. 
The evaluation metric for a problem is decided based on the specific goals and requirements of the problem.
• Consider the problem's objective: classification, regression, clustering, etc.

• Understand the business or research context to determine the most relevant metric.

• Evaluate the metric's suitability: sensitivity to class imbalance, interpretability, etc.

• Choose a metric that aligns with the problem's priorities and cons...read more
Answered by AI
Add your answer

QUESTIONS WERE MODERATE WHERE WE HAVE TO DO 45 IN 50 MINUTES

SQL QUERY AND ONE CODING QUESTION