Dropdown Interview Questions

Render a controlled select dropdown from an array of strings or objects using map(). Know how to track the selected value and handle the placeholder option.

Track a select value in state and display it anywhere on the page. This is the controlled component pattern applied to dropdowns and is the foundation for summary panels and confirmation UIs.

Design a performant multi-select with search, keyboard navigation, tag rendering, virtualization for large option sets, and async loading.