Publicis Sapient Lead Engineer Interview Questions, Process, and Tips

Q1. Graphql , Web workers vs Service workers
Ans. 
GraphQL is a query language for APIs, Web workers run scripts in background threads, Service workers are scripts that run in the background and can intercept network requests.
• GraphQL is a query language for APIs that allows clients to request only the data they need.

• Web workers run scripts in background threads separate from the main browser thread, improving performance by handling tasks concurrently.

• Service workers a...read more
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Create a autocomplete component with best practices.

Q1. Create a todolist using plain javascript
Ans. 
Create a todolist using plain javascript
• Create an input field for adding tasks

• Use an array to store the tasks

• Display the tasks in a list on the webpage

• Add functionality to mark tasks as completed or delete them
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Q2. Explain web vitals
Ans. 
Web vitals are a set of metrics related to user experience on websites, including loading speed, interactivity, and visual stability.
• Web vitals include metrics such as Largest Contentful Paint (LCP), First Input Delay (FID), and Cumulative Layout Shift (CLS).

• They are important for measuring and improving user experience on websites.

• Google uses web vitals as a ranking factor for search results.

• Developers can use tools l...read more
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Q3. What is the importance of knowing js internals
Ans. 
Understanding JavaScript internals is important for optimizing performance, debugging, and writing efficient code.
• Helps in optimizing performance by understanding how JavaScript engines work under the hood

• Aids in debugging by knowing how different data types are stored and manipulated

• Enables writing efficient code by understanding concepts like event loop, closures, and prototypes
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