Software Engineer2 Interview Questions and Answers for Freshers

Find pair of elements in array whose sum is equal to target k.

• Use a hashmap to store the difference between target k and each element in the array.

• Iterate through the array and check if the current element's complement exists in the hashmap.

• Return the indices of the pair that sums up to target k.

The task is to find the frequency of subsequent characters in a given input string.

• Iterate through the input string while keeping track of the current character and its frequency.

• If the current character is the same as the previous character, increment the frequency count.

• If the current character is different, append the previous character and its frequency to the output string.

• Repeat until the end of the input string is reached.

Actuator in Spring Boot provides production-ready features like monitoring and metrics.

• Actuator is a set of tools provided by Spring Boot to monitor and manage your application.

• Actuator endpoints are URLs that provide information about your application, such as health, metrics, info, etc.

• Examples of actuator endpoints include /actuator/health, /actuator/metrics, /actuator/info, etc.

Paytm uses microservices architecture for scalability and flexibility in system design.

• Paytm's system design is based on microservices architecture to break down the application into smaller, independent services.

• Each service in Paytm's architecture handles a specific function, such as payments, wallet, or shopping.

• Microservices communicate with each other through APIs, allowing for easier scalability and maintenance.

• This architecture enables Paytm to quickly add new features...read more

Microservices architecture is a design pattern where an application is composed of small, independent services that communicate over well-defined APIs.

• Each microservice is responsible for a specific business function or capability

• Services are loosely coupled and can be developed, deployed, and scaled independently

• Communication between services is typically done through lightweight protocols like HTTP or messaging queues

• Microservices architecture promotes flexibility, scalabil...read more

Implementing a game using ReactJS involves creating components for game elements, managing state, handling user interactions, and updating the UI.

• Create separate components for game elements such as game board, player pieces, and score display.

• Use React state to manage game state, such as player turns, scores, and game progress.

• Handle user interactions, such as clicking on game pieces or buttons, to update game state.

• Update the UI dynamically based on game state changes to pr...read more

Designing the architecture for Uber's software system

• Use microservices architecture for scalability and flexibility

• Implement a robust backend system for handling user requests and driver matching

• Utilize real-time data processing for tracking driver locations and ride requests

• Incorporate a payment gateway for seamless transactions

• Include a rating system for feedback and quality control