What is the AppBar widget?
Why Interviewers Ask This
This question tests conceptual clarity. Interviewers want to hear a precise, confident definition before moving to more complex Flutter topics. It also reveals how well you can explain technical ideas to non-experts.
Answer
AppBar is a Material Design app bar displayed at the top of the screen, usually inside a Scaffold. It includes a title, optional leading icon (usually a back or menu button), and actions (a row of icon buttons on the right). You can add a bottom widget (like a TabBar) and a flexibleSpace for custom background content. The elevation property controls the shadow depth.
Pro Tip
This topic has Flutter-specific nuances that differ from general programming. Highlighting those nuances in your answer shows expertise rather than generic knowledge.