Basic JS,  
 React Functional Components 
 Class based Components  
 Props vs State 
 Lifecycle in React functional components and how it was managed before functional component. 
 When does a compnent re-reender

Software Developer

Virtual DOM 
 Event Loop 
 Diffing algo 
 React hooks

Thanks, How much CTC should I expect or ask ?

Software Engineer

Depends on your current salary and location

I have a React JS Developer Interview at Infosys.

What should I expect in the 30min Technical Round o.O ?

I have 3yoe, what should be a good ask (fixed).

Interview at Infy