PhonePe Frontend Interview Experience | UI Engineer (5 Days WFO)

👉 this keyword in different contexts. 
👉 Call Bind Apply and polyfills  [ Call Polyfill, Apply Polyfill, Bind Polyfill ] 
👉 Closures – write a small example.
👉 Event loop: explain microtasks vs macrotasks. [ Best Event Loop Resources ]
👉 Deep copy vs shallow copy in JS with examples.
👉 PubSub Coding Problem

👉 Classic problems on arrays and strings (reversals, duplicates, subarrays). [Array String DSA]
👉 Solving a two-pointer problem under time constraints.
👉 Time & space complexity discussions after each solution.
👉 Focus was less on final answer, more on approach + optimization.

👉 Walkthrough of my past projects and design decisions.
👉 Handling tight deadlines in UI delivery.
👉 How I debug complex frontend issues.
👉 What motivates me to work in frontend engineering.

👉 How browsers render a web page (critical rendering path).
👉 Web Sockets
👉 Machine Coding based on a custom hook and timer
👉CSS: difference between absolute, relative, fixed, sticky positioning.
👉Explain event delegation with an example.
👉HTTP vs HTTPS, how TLS works in simple terms.
👉Browser storage: localStorage, sessionStorage, cookies.
👉A few scenario-based performance optimization questions.