Front End Development Core Technologies & Fundamentals Flashcards
6 cards from real Front End Development practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 6 Front End Development Core Technologies & Fundamentals flashcards as text
What does the CSS 'box-sizing: border-box' property ensure?
Answer: Padding and border are included in the element's total width
With border-box, padding and border widths are included in the element's specified total width, preventing layout surprises.
Which JavaScript keyword declares a block-scoped variable that cannot be reassigned?
Answer: const
The const keyword declares a block-scoped variable whose binding cannot be reassigned after initialization.
In HTML, which input type renders a date picker in modern browsers?
Answer: type='date'
The input type='date' attribute causes modern browsers to render a native date picker control.
Which CSS unit is relative to the font size of the root element?
Answer: rem
The rem unit (root em) is always relative to the font-size of the root element, unlike em which is relative to the parent.
What is the purpose of the JavaScript 'addEventListener' method?
Answer: Attaches an event handler function to an element
addEventListener attaches a specified event handler callback to a DOM element, enabling interactive behavior.
Which HTML5 element is used to group related form controls with a visible label?
Answer:
The element groups related form controls, and provides a caption for the group, improving accessibility.
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