Kaseya Software Data Engineer Interview Questions and Answers

Q1. Find second max salary of employee by department in sql
Ans. 
Find second max salary of employee by department in SQL
• Use GROUP BY clause to group employees by department

• Use MAX() function to find the maximum salary

• Use subquery to find the second maximum salary
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Q2. Find second max salary 9f employee by department using python pandas dataframe
Ans. 
Find second max salary of employee by department using pandas dataframe
• Group the dataframe by department

• Sort the salaries in descending order

• Select the second highest salary for each department
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Q3. Python code to download file from aws s3 to local using boto3
Ans. 
Python code to download file from aws s3 to local using boto3
• Install boto3 library using pip

• Create an S3 client using boto3

• Use the download_file method to download the file from S3 to local
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Q4. Write word count program in pyspark
Ans. 
A program to count the number of words in a text file using PySpark.
• Read the text file using SparkContext

• Split the lines into words using flatMap

• Map each word to a tuple of (word, 1)

• Reduce by key to count the occurrences of each word

• Save the output to a file
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Q1. DSA Array, String and Hashmap questions
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Q2. Functional programming java questions
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Q1. Spring and spring boot related
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Q2. HLD scenario level questions
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Q3. SQL queries nested and joins
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Q4. DB related questions and experience level questions and previous project situations related questions
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Q5. Security level questions like XSS vulnerability and SQL injection
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A good, basic understanding will suffice.

Q1. Questions about OOPs, DBMS. Fundamental understanding will work
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Q1. Backend Questions regarding
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Q2. UI Questions regarding Angular
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Q1. Explain the technology stack you have been working on.
Ans. 
I have been working on a technology stack that includes Java, Spring Boot, Angular, and MySQL.
• Java programming language for backend development

• Spring Boot framework for building and deploying Java applications

• Angular framework for frontend development

• MySQL database for data storage and retrieval
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Q2. Deep dive into the .Net framework and its use in developing microservices using Web APIs
Ans. 
The .Net framework is a powerful tool for developing microservices using Web APIs.
• The .Net framework provides a set of libraries and tools for building scalable and reliable microservices.

• Web APIs in .Net allow for easy communication between different services and clients.

• Features like dependency injection and middleware in .Net make it easier to develop and maintain microservices.

• Examples of popular frameworks for bui...read more
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Q1. Explain how you would troubleshoot a network bottleneck in your web API application hosted in a public cloud like Azure or AWS.
Ans. 
To troubleshoot a network bottleneck in a web API application hosted in a public cloud like Azure or AWS, one can analyze network traffic, monitor server performance, and optimize resource allocation.
• Use network monitoring tools to analyze traffic patterns and identify potential bottlenecks.

• Monitor server performance metrics such as CPU usage, memory usage, and disk I/O to pinpoint any resource constraints.

• Optimize res...read more
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Q2. Explain the usage of Azure service fabric clusters
Ans. 
Azure Service Fabric clusters are used to deploy and manage microservices-based applications on Microsoft Azure.
• Azure Service Fabric clusters provide a platform for deploying and managing scalable and reliable microservices.

• They offer automatic scaling, rolling upgrades, and health monitoring for microservices.

• Service Fabric clusters can be used to deploy stateless or stateful microservices.

• They support multiple progra...read more
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There will be 3 coding questions given to us for solving,we need solve two questions compulsory.

Q1. Introduce yourself
Ans. 
I am a software engineer with 5 years of experience in developing web applications using Java, Spring, and Angular.
• 5 years of experience in software development

• Proficient in Java, Spring, and Angular

• Strong problem-solving skills
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Q2. Questions related to frontend
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Q1. Java,oop, microservice, JPA
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Q2. Spring boot , MySQL
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Q1. Java, spring boot
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Q2. Microservice, rest api
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It included question from aptitude, reasoning, English, CSE fundamentals like oops and sql

Q1. It included everything which was mentioned in your resume
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Q1. Same as round 2, it has few managerial questions as well
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