Geeks Invention Senior Consultant Interview Questions and Answers

Basic understanding of algorithms, concepts were verified in Hackerrank test

Q1. The technical discussion of 1 hour with single interviewer took place. Which was more focussed on verifying how good my skills are aligned to their expectations.
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Q2. How Eventloop works in NodeJs
Ans. 
Eventloop in NodeJs manages asynchronous operations by executing non-blocking code.
• Eventloop is a single-threaded loop that handles I/O operations asynchronously.

• It allows NodeJs to perform non-blocking operations by delegating I/O tasks to the system kernel.

• Eventloop processes tasks in a queue and executes them in a sequential order.

• Callbacks are used to handle the completion of asynchronous tasks.

• Example: setTimeout(...read more
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Q3. How efficiently we can use NodeJs in production environment
Ans. 
NodeJs can be efficiently used in production environments due to its non-blocking I/O, scalability, and large ecosystem of libraries.
• NodeJs uses non-blocking I/O which allows for handling multiple requests simultaneously, improving performance and scalability.

• NodeJs has a large ecosystem of libraries and frameworks that can be easily integrated to build robust applications.

• NodeJs supports clustering which enables load ...read more
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Q4. What are the various ways, two microservices can talk to each other. When to use which approach
Ans. 
Microservices can communicate through synchronous HTTP calls, asynchronous messaging, and event-driven architecture.
• Synchronous HTTP calls are suitable for simple request-response interactions between microservices.

• Asynchronous messaging is useful for decoupling services and handling high volumes of data.

• Event-driven architecture allows microservices to react to events and updates in real-time.

• Choose synchronous HTTP c...read more
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