IQVIA Sr. FUll Stack Developer interview questions

1)Tell me about myself 2) How did i perfom tdd with my web forms app 3) What are latest features used from c#/.net & javascript 4) Is javascript pass by value or pass by reference using swap function 5) equality in javascript == and === 6)async & await vs promises 7) observables 8) closures & bind function (how do we persist values on callback of async function)