Panel-ready Frontend Master questions for freshers and experienced developers. Practice at Coding Cadre in Faridabad, or Online from Delhi NCR.
200 means success so I render the data.
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Divs have no meaning, so screen readers and outline tools cannot find nav, headings, or lists.
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Em is relative to the parent font-size, so it compounds in nested components.
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It turns a JS value into a JSON string for APIs or localStorage.
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It stops the browser's default action, like following a link or submitting a form.
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Hooks let us reuse stateful logic without HOCs and mixins.
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A class can be reused on many elements
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Map returns a new array of transformed items and is the React list pattern.
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Both download the script without blocking HTML parse.
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UseEffect runs after paint for side effects: fetch, subscriptions, and syncing to document title.
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Rem is relative to the root html font size, so spacing stays consistent across the page.
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It clips content that sticks outside the box and usually removes scrollbars.
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section means thematic grouping with meaning
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GET puts fields in the URL query string and is for safe reads you might bookmark.
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It sets spacing between items without margin hacks.
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A real button gets keyboard focus, Enter/Space activation, and the right role for free.
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rem is relative to the root font size
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It short-circuits when a middle value is null or undefined instead of throwing.
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Keys tell React which item is which across renders so state stays on the right row.
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