FiftyFive Technologies Software Developer Interview Questions and Answers

Q1. Technology related questions in my case it is reactjs.
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Q2. Hooks,Redux, React lifecycle
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Q1. How to scale app for large customer base.
Ans. 
To scale an app for large customer base, consider using cloud services, optimizing database queries, implementing caching mechanisms, and utilizing load balancing.
• Utilize cloud services such as AWS or Azure to easily scale resources based on demand

• Optimize database queries to improve performance and handle large amounts of data efficiently

• Implement caching mechanisms to reduce the load on servers and improve response t...read more
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Q2. How to optimize web app
Ans. 
Optimizing a web app involves improving performance, speed, and user experience.
• Minimize HTTP requests by combining files, using CSS sprites, and reducing scripts

• Enable browser caching to reduce server load and improve load times

• Optimize images by using the correct format, size, and compression

• Use a content delivery network (CDN) to distribute content closer to users for faster loading times

• Implement lazy loading for i
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Q1. General questions of my past working experience
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Q1. Basic Javascript questions - Async-await, promises, how javascript runs in the browser. Cross questions for projects I worked on in my previous company. Database design questions
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Q2. Build an API in node.js that takes an array in the body and responds with a sorted array(merge sort).
Ans. 
Build an API in node.js that sorts an array using merge sort algorithm.
• Create a POST endpoint in node.js that accepts an array of strings in the request body.

• Implement the merge sort algorithm to sort the array.

• Return the sorted array as the response.
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Q1. They told me the offer, and I negotiated a little bit and they agreed.
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Q1. General JS and react questions, and project related questions
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Implement quick sort

Q1. Salary negotiation
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Q2. Some managerial questions like what are your objectives, some situational questions
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