Multiplier

Bulk employee upload over a single-create API

Design a payroll payouts data pipeline (star schema + transformation)

Implement a rate limiter class

Design an insurance-package aggregation service across providers and countries

What are design principles and design patterns?

Binary tree level-order traversal

Topological sort of a directed graph

Database normalisation

Multithreading and concurrency in Java

How does HashMap work internally in Java?

Microservices concepts: middleware and observability

Number of islands

What challenges did you face when working remotely?

Explain JavaScript execution contexts, scope and hoisting

Difference between tuples and lists in Python

How would you design/build a new test automation framework?

Generate all permutations of an array

Explain the JavaScript event loop