Eli Lilly and Company interview question

1) JavaScript Questions. - How JS works? - Difference b/w var, let and const? - What is Event Loop? - How Node.js Works? - Classic setTimeout console.log question? - What is a closure and example? - What is a Promise and example? - Error-based call back? - What are middleware and custom middleware? 2) AWS Questions. - Difference b/w Horizontal and Verticale scaling? - Cloudfront vs Terraform? - EC2 vs Lambda - RDS vs NoSQL in AWS - Graph DB - How will you handle infrastructure upgrades? 3) Scenario-Based Questions - Why Eli Lilly - Tell me the time how to deal will a very challenging client. - Tell how you see yourself in Bank-end and cloud.