How should I practice Swap Adjacent Nibbles?

Start by reading the full statement, solve the visible examples, then compare the pattern against related Arista Networks phone screen problems in FastPrep.

Is Swap Adjacent Nibbles associated with Arista Networks?

FastPrep tags this as a Arista Networks phone screen coding practice problem when the problem catalog has that company and stage context.

Swap Adjacent Nibbles

Arista Networks● EasyFULLTIMEPHONE SCREEN

Learn

Problem statement

Treat a non-negative value as exactly eight hexadecimal digits, including leading zeroes. Swap each adjacent pair of four-bit nibbles: the first with the second, the third with the fourth, and so on. Return the resulting unsigned 32-bit value as a long.

Function

swapAdjacentNibbles(value: long) → long

Examples

Example 1

value = 305419896return = 558065031

The hexadecimal digits 12 34 56 78 become 21 43 65 87.

Constraints

0 <= value <= 2^32 - 1