DigiFlux IT Solutions Interview Questions and Answers

Q1. What tools and technologies do you know in DevOps?
Ans. 
I am familiar with tools like Jenkins, Docker, Kubernetes, Git, and Ansible in DevOps.
• Jenkins

• Docker

• Kubernetes

• Git

• Ansible
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Q2. What is SDLC?
Ans. 
SDLC stands for Software Development Life Cycle, which is a process used by software development teams to design, develop, and test high-quality software.
• SDLC is a structured process that consists of several phases such as planning, analysis, design, implementation, testing, and maintenance.

• Each phase in the SDLC has its own set of activities and deliverables that contribute to the overall success of the software proje...read more
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Q1. How to manage traffic in AWS ec2?
Ans. 
Traffic in AWS EC2 can be managed using various methods such as load balancers, auto scaling, and security groups.
• Use Elastic Load Balancing to distribute incoming traffic across multiple instances for better fault tolerance and availability.

• Implement Auto Scaling to automatically adjust the number of EC2 instances based on traffic demand to ensure optimal performance and cost efficiency.

• Utilize security groups to cont...read more
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Q2. What AWS services do you know and why they are important in DevOps?
Ans. 
AWS services commonly used in DevOps include EC2, S3, RDS, Lambda, and CloudFormation.
• EC2 (Elastic Compute Cloud) for scalable virtual servers

• S3 (Simple Storage Service) for object storage

• RDS (Relational Database Service) for managed databases

• Lambda for serverless computing

• CloudFormation for infrastructure as code
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Q1. What is use of Load balancers and auto scaling?
Ans. 
Load balancers distribute incoming network traffic across multiple servers to ensure optimal resource utilization, while auto scaling automatically adjusts the number of servers based on traffic demand.
• Load balancers help prevent overload on any single server by distributing traffic evenly.

• Auto scaling allows for dynamic allocation of resources based on traffic patterns, ensuring efficient use of resources.

• Load balance...read more
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Q2. How to handle traffic withing k8s cluster with cost effectiveness?
Ans. 
Use Kubernetes Ingress controllers and Horizontal Pod Autoscalers to efficiently handle traffic within a k8s cluster.
• Utilize Kubernetes Ingress controllers to manage inbound traffic and route it to the appropriate services within the cluster.

• Implement Horizontal Pod Autoscalers to automatically adjust the number of pods based on traffic load, ensuring cost effectiveness by scaling up or down as needed.

• Consider using a ...read more
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Q3. How to optimise docker images?
Ans. 
Optimizing docker images involves reducing image size, using multi-stage builds, and minimizing layers.
• Use multi-stage builds to reduce the number of layers in the final image

• Remove unnecessary files and dependencies to reduce image size

• Use a smaller base image like Alpine instead of a full Linux distribution

• Combine multiple RUN commands into a single command to reduce the number of layers

• Use .dockerignore file to excl...read more
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Q1. What are the difference between find and filter methods
Ans. 
Find method returns the first element that satisfies a condition, while filter method returns all elements that satisfy a condition.
• Find method returns the first element that satisfies the condition

• Filter method returns all elements that satisfy the condition

• Find method stops after finding the first match

• Filter method goes through all elements in the array

• Example: const numbers = [1, 2, 3, 4, 5]; numbers.find(num => nu...read more
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Q2. What is difference between DOM and Virtual Dom
Ans. 
DOM is the actual representation of the document in the browser, while Virtual DOM is a lightweight copy of the DOM used for efficient updates.
• DOM is the real representation of the document in the browser, while Virtual DOM is a lightweight copy of the DOM kept in memory.

• Changes to the Virtual DOM are compared with the actual DOM, and only the differences are updated in the real DOM for performance optimization.

• Virtual...read more
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Implement Google Authentication and Pagination