EPAM Systems Senior Software Engineer 2 Interview Questions and Answers for Experienced

Two java coding questions - 1 DSA and 1 streams

Q1. AWS lambda related - cons and pros
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Q2. AWS VPC related - NACL and security groups
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Q1. System design of current project
Ans. 
Designed a scalable microservices architecture using Docker and Kubernetes for real-time data processing.
• Utilized Docker containers to encapsulate each microservice for easy deployment and scaling

• Implemented Kubernetes for automated container orchestration and management

• Used Kafka for real-time data streaming and processing

• Designed RESTful APIs for communication between microservices
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Q1. There were many interview questions about javascript. You need to know about OOPS in javascript,prototypical inheritance, find palindrome substring in a given string most optimal solutions
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Q2. Difference between merge and rebase in git
Ans. 
Merge combines changes from different branches, while rebase moves the current branch to the tip of another branch.
• Merge creates a new commit with the combined changes of two branches.

• Rebase moves the current branch to the tip of another branch, replaying the commits on top of it.

• Merge preserves the commit history of both branches, while rebase creates a linear history.

• Merge is non-destructive and is preferred for pres...read more
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Q3. Angular usefactory , usevalue, useclass
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Q4. Hirerichal injector in angular
Ans. 
Hierarchical injectors in Angular manage dependency injection across component trees, promoting modularity and reusability.
• Angular uses a hierarchical dependency injection system to manage services and components.

• Each Angular module can have its own injector, allowing for scoped services.

• Child components can access services from their parent injectors, enabling shared state.

• Example: A service provided in a parent compo...read more
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Q1. Create Shell script for 100 users on 5 different servers
Ans. 
Create a Shell script to add 100 users on 5 different servers.
• Use a loop to create 100 users on each server.

• Utilize the 'useradd' command to add users.

• Ensure unique usernames for each user on each server.

• Consider using SSH for remote server access.

• Test the script on a single server before running on all servers.
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Q2. Create ci/cd pipeline
Ans. 
Set up a ci/cd pipeline for automated software deployment
• Choose a CI/CD tool like Jenkins, GitLab CI, or CircleCI

• Define the stages of the pipeline (build, test, deploy)

• Integrate with version control system (e.g. GitHub, Bitbucket)

• Automate testing and code quality checks

• Configure notifications for pipeline status updates
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Q1. Tell me about terraform
Ans. 
Terraform is an open-source infrastructure as code software tool created by HashiCorp.
• Terraform allows users to define and provision infrastructure using a declarative configuration language.

• It supports multiple cloud providers such as AWS, Azure, and Google Cloud Platform.

• Terraform uses a 'plan and apply' workflow to make changes to infrastructure.

• It helps in automating the process of setting up and managing infrastru...read more
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Q2. Write auto scaling of ec2 instances
Ans. 
Auto scaling of EC2 instances involves setting up policies to automatically adjust the number of instances based on demand.
• Set up CloudWatch alarms to monitor metrics like CPU utilization or network traffic

• Create an Auto Scaling Group with desired minimum and maximum number of instances

• Define scaling policies to add or remove instances based on the alarms triggered

• Test the auto scaling by simulating load on the instanc...read more
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Q1. Tell me more about python scripting
Ans. 
Python scripting is a way to automate tasks using Python programming language.
• Python scripting allows for automating repetitive tasks by writing scripts in Python.

• It is commonly used for tasks like data processing, web scraping, and automation.

• Python scripts can be run from the command line or integrated into larger applications.

• Python's extensive standard library makes it easy to work with files, networks, and more.
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Q2. Where do you see after 5 years in this organization
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