Freecharge Lead Engineer Interview Questions and Answers

Q1. What is the use of @LoadBalanced annotation
Ans. 
The @LoadBalanced annotation is used in Spring Cloud to indicate that a RestTemplate should be load balanced.
• Used to automatically distribute client requests across multiple instances of a service

• Helps in achieving high availability and scalability

• Works in conjunction with Ribbon load balancer in Spring Cloud
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Q2. You can use this annotation on top of RestTemplate Bean. By this annotation the instance that will be created is load balanced i.e you don't need to write code to make this RestTemplate bean load balanced.
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Q1. Describe your project and role
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Q2. You need to describe your project in detail like current technologies being used etc. and your roles and responsibilities
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Q1. 1. Design notification system
Ans. 
Design a notification system for timely alerts and updates.
• Identify the target audience and their preferred communication channels (email, SMS, push notifications, etc.)

• Define the types of notifications to be sent (urgent alerts, reminders, updates, etc.)

• Implement a user-friendly interface for users to manage their notification preferences

• Include features like scheduling notifications, customizing notification settings...read more
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Q1. 1.Messaging queue working like Kafka
Ans. 
Messaging queue system similar to Kafka for real-time data processing and streaming
• Kafka is a distributed streaming platform capable of handling high volumes of data in real-time

• It uses topics to organize data streams and partitions for scalability

• Producers publish messages to topics and consumers subscribe to topics to receive messages

• Kafka provides fault tolerance, scalability, and high throughput for data processing

• ...read more
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SQL and technical. Statistics.

Business case study. Problem solving

Q1. Past experience
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Q2. Reason to change
Ans. 
The reason to change can be due to evolving business needs, technological advancements, regulatory requirements, or competitive pressures.
• Evolving business needs: Changes in market trends, customer preferences, or strategic goals may necessitate a change in business processes.

• Technological advancements: Adoption of new technologies can improve efficiency, enhance customer experience, or enable new capabilities.

• Regulato...read more
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Q1. Reason for change
Ans. 
Change is necessary to adapt to evolving business needs, technology advancements, and market trends.
• Change is essential for growth and innovation

• To stay competitive in the market

• To improve efficiency and productivity

• To meet customer demands and expectations

• To align with new technologies and industry standards
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