Sort And Searching Question:
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Tell me which of the following maintain index associations?

• ksort
• asort
• sort


These are php sorting methods.

ksort and asort maintain index associations and sort from lowest to highest. ksort sorts keys.
sort doesnt maintain index associations.

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Explain which of the following is true about asort?
• Sorts highest to lowest by value maintaining key association.
• Sorts lowest to highest by key maintaining key association.
• Sorts highest to lowest by key, re-indexing the array.
• Sorts lowest to highest by value, re-indexing the array.
Tell me why might quick sort might be better than merge sort