Applify Tech Interview Questions, Process, and Tips

Q1. My professional overview and background
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Q2. Technical experience with nodejs and AWS services
Ans. 
Extensive experience with nodejs and AWS services
• Developed multiple backend applications using nodejs

• Implemented serverless architecture on AWS using Lambda functions

• Utilized AWS services like EC2, S3, RDS, and API Gateway

• Experience with deploying and managing applications on AWS

• Optimized performance and scalability of applications on AWS
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Design a scalable architecture using Nodejs and choose appropriate AWS services, while considering fault tolerance strategies.

Q1. Describe a complex nodejs application you've built and highlight the architectural decisions made.
Ans. 
Built a real-time chat application using Node.js with WebSockets for instant messaging.
• Utilized Socket.io library for real-time communication between clients and server

• Implemented a scalable architecture using microservices to handle different functionalities like user authentication, message storage, and message delivery

• Used MongoDB as the database to store chat messages and user information

• Implemented JWT tokens for
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Q2. My experience with AWS serverless architecture.
Ans. 
I have extensive experience with AWS serverless architecture, including Lambda functions, API Gateway, and DynamoDB.
• Utilized Lambda functions to execute code without provisioning or managing servers

• Integrated API Gateway to create and deploy RESTful APIs

• Stored and retrieved data using DynamoDB for a scalable and high-performance database solution
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Q3. How do i manage asynchronous operations in nodejs
Ans. 
Asynchronous operations in Node.js are managed using callbacks, promises, async/await, and event emitters.
• Use callbacks to handle asynchronous operations in a sequential manner

• Utilize promises for cleaner and more readable asynchronous code

• Async/await provides a more synchronous way to write asynchronous code

• Event emitters can be used to handle multiple asynchronous operations simultaneously
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There was 2 round
1st round
1. asked about theoretical question about testing
2. What is sanity testing
3. What difference between regression and system testing
4. ASked to write test cases for existing application

Q1. 2nd Round 1. why testing field 2. what is the standard process of testing 3. extra activities 4. strength and weakness
Ans. 
Answering questions on testing field, standard process, extra activities, strengths and weaknesses.
• I chose testing field because I enjoy finding and fixing bugs.

• The standard process of testing includes planning, designing test cases, executing tests, reporting bugs, and retesting.

• Extra activities include learning new testing techniques, attending conferences, and collaborating with other testers.

• My strengths include at...read more
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