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Small company interview, just gaining experience. The questions were all classic interview staples.

Shoplazza First Round

• Self-introduction
• Difference between onClick and addEventListener
• Talk about closures
  • Scope chain
  • Closure use cases (higher-order functions, currying, etc.)
• Throttle and debounce implementation (explain the approach)
  • Throttle: Start with a null timer. When the event triggers, if the timer exists, don’t process the event; otherwise, execute the event handler and set a timer.
  • Debounce: Start with a null timer. When the event triggers, clear the timer and set a new one. The timer callback executes the event handler.
• CSS horizontal and vertical centering
• Talk about browser caching
  • cookie, localStorage, sessionStorage
  • Strong cache and negotiation cache
• Your resume mentions Redux. Do you understand its implementation?
  • createStore implementation. See my previous blog post: Redux Learning Journey (1) - Redux Three Principles, createStore Principles and Implementation
• Pros and cons of async/await vs Promise
• What is cross-origin?
• Solutions to cross-origin issues
• Talk about insertion sort (I refused and talked about quicksort and merge sort instead)
• Why did you choose frontend?
• How did you self-study?
• Questions for the interviewer
  • Business tech stack: B2B, building e-commerce websites for merchants, uses Vue, React, React being the majority. Open to new technologies, no compatibility requirements.
  • When will results come out, etc.