Publicis Sapient Lead Engineer Interview Questions, Process, and Tips

Use a hash set to remove duplicates in an array of strings

• Create a hash set to store unique elements

• Iterate through the array and add each element to the hash set

• Convert the hash set back to an array to get the unique elements

React virtual DOM is a lightweight copy of the actual DOM, used for efficient updates and rendering in React applications.

• Virtual DOM is a concept where a lightweight copy of the actual DOM is created in memory.

• React uses virtual DOM to efficiently update and render components without directly manipulating the actual DOM.

• When changes are made to the virtual DOM, React calculates the most efficient way to update the act...read more

React hooks are functions that let you use state and other React features without writing a class.

• React hooks were introduced in React 16.8 to allow functional components to have state and lifecycle methods.

• useState() is a hook that allows you to add state to functional components.

• useEffect() is a hook that allows you to perform side effects in functional components.

• useContext() is a hook that allows you to use the con...read more

Turbine startup involves several steps to safely bring the turbine to operating speed.

• Perform pre-start checks to ensure all systems are ready

• Open steam inlet valves to allow steam to flow into the turbine

• Gradually increase steam flow to bring the turbine up to speed

• Monitor temperature and pressure levels throughout the startup process

• Verify all systems are functioning properly before reaching full operating speed

Convert even numbers in a list of strings to odd by adding 1

• Iterate through the list of strings and check if each element is a number

• If the number is even, convert it to odd by adding 1

• Return the modified list of strings

I would use Spring Boot to create a stateless microservice with CRUD API, returning appropriate responses for each operation.

• Use @RestController annotation to define RESTful endpoints

• Implement methods for Create, Read, Update, and Delete operations using @PostMapping, @GetMapping, @PutMapping, @DeleteMapping annotations

• Return appropriate HTTP status codes (e.g. 200 for successful operation, 404 for not found, 400 for b...read more