Synoptek Data Engineer Interview Questions and Answers

Q1. 3rd largest salary from each department(window function)
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Q1. Explain process in adf
Ans. 
ADF stands for Azure Data Factory, a cloud-based data integration service that allows you to create, schedule, and manage data pipelines.
• ADF allows you to create data-driven workflows for orchestrating and automating data movement and data transformation.

• You can use ADF to ingest data from various sources, process and transform the data, and then publish the data to different destinations.

• ADF supports a wide range of d...read more
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Coding test was bad. they asked irrelevant things that were not related to the field

Q1. What is data engineering
Ans. 
Data engineering is the process of designing, building, and maintaining the infrastructure for data storage and processing.
• Data engineering involves creating and managing data pipelines

• It includes tasks such as data modeling, data integration, and data warehousing

• Data engineers work with big data technologies such as Hadoop, Spark, and NoSQL databases

• They also ensure data quality, security, and scalability

• Examples of d...read more
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Q2. What is resilient distributed database
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A resilient distributed database is a database that can continue to function even if some of its nodes fail.
• It is designed to be fault-tolerant and highly available.

• Data is distributed across multiple nodes to ensure redundancy.

• If one node fails, the database can continue to function using data from other nodes.

• Examples include Apache Cassandra, Riak, and HBase.
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Q1. What do u mean by data
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Data refers to facts, statistics, or information collected for analysis or reference.
• Data is raw, unprocessed information.

• It can be in the form of numbers, text, images, or any other format.

• Examples include customer names, product prices, and sales figures.

• Data can be structured (organized in a specific way) or unstructured (not organized).
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Q2. What is preprocessed data
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Preprocessed data is data that has been cleaned, transformed, and organized for analysis or modeling.
• Preprocessed data is often used in machine learning and data analysis to improve the accuracy and efficiency of models.

• Common preprocessing steps include removing missing values, scaling features, and encoding categorical variables.

• Examples of preprocessing techniques include normalization, standardization, one-hot enco
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Q3. What do u mean by info
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Info refers to data or knowledge that provides details or context about a specific topic or subject.
• Info can be in the form of facts, statistics, or explanations.

• It helps to understand a topic better or make informed decisions.

• Examples of info include news articles, research papers, and educational resources.
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Q4. How to copy from 2 tables and paste in 3rd one in sql
Ans. 
Use SQL INSERT INTO SELECT statement to copy data from 2 tables and paste into a 3rd table.
• Use INSERT INTO SELECT statement to copy data from 2 tables and paste into a 3rd table.

• Specify the columns you want to copy from each table in the SELECT statement.

• Make sure the columns in the SELECT statement match the columns in the 3rd table where you are pasting the data.
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Q5. Reverse string using any language you know
Ans. 
Reverse a string using any programming language
• Use built-in functions like reverse() or slice() in languages like Python or JavaScript

• Iterate through the string in reverse order and append each character to a new string

• Use a stack data structure to push each character onto the stack and then pop them off to reverse the string
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Q6. A puzzle question was asked but i don't remeber it.
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Q1. Project related question
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Q1. Scenario based question
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Q1. Salary discussion
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Assusual apti questions from every topics

1. 1 coding Question we can use java, python etc to solve and
2. another 1 sql question

One question based on any one data structure (in my case I solved stack &queue combinely)

Q1. They ask about Ur background qualifications and verify
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Q2. And then explain the process of company and ask everything is ok for us like bond etc
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Q3. Then sheduled interview on the next day
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Q1. She(hr) introduced herself
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Q2. Then she asked me to introduce myself
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Q3. What are the programming languages u know ( I said I'm strong in java)
Ans. 
I am strong in Java programming language.
• Proficient in Java programming language

• Experience in developing applications using Java

• Knowledge of Java frameworks like Spring and Hibernate
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Q4. Rate Urself in it out of 5
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I rate myself 4 out of 5 in IT skills.
• Proficient in programming languages such as Java, Python, and C++

• Experienced in software development and debugging

• Familiar with database management systems like MySQL and MongoDB
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Q5. She asked me to explain lambda expressions in java
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Q6. Explain detaily about Four pillars of oops
Ans. 
The four pillars of OOP are encapsulation, inheritance, polymorphism, and abstraction.
• Encapsulation: Bundling data and methods that operate on the data into a single unit.

• Inheritance: Allows a class to inherit properties and behavior from another class.

• Polymorphism: Ability to present the same interface for different data types.

• Abstraction: Hides the complex implementation details and only shows the necessary features.
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Q7. Share Ur screen and get this output (pattern program)
Ans. 
Print a specific pattern using loops
• Use nested loops to print the desired pattern

• Increment the number of characters printed in each row

• Adjust the spacing to create the desired pattern
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Q8. Shorterm and long-term goals
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Q9. If your assigned to a task how can you complete it
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Q10. Exception handling concept (she specifically asked about throw, throws, finally keyword)
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Q11. Explain about Static keyword
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Static keyword is used in programming languages to declare variables, functions, or classes that are shared among all instances of a class or are only accessible within a specific scope.
• Static variables retain their values between function calls

• Static functions can only be called within the same file

• Static classes cannot be instantiated and are used for grouping related methods and properties
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Q1. Basic to medium questions related to DotNet Core MVC, SQL Server, etc
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Q1. Completely unprofessional behavior of the interviewer. - No Introduction Direct start asking questions. - Asking too many misleading questions (First ask what you worked on, then ask did you heard about th...read more
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