How should I practice Group Anagrams?

Start by reading the full statement, solve the visible examples, then compare the pattern against related Amazon onsite interview problems in FastPrep.

Is Group Anagrams associated with Amazon?

FastPrep tags this as a Amazon onsite interview coding practice problem when the problem catalog has that company and stage context.

Group Anagrams

Amazon● MediumNEW GRADFULLTIMEONSITE INTERVIEW

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Problem statement

Group the strings in strs so that two strings appear in the same group exactly when they are anagrams.

For this exercise, assume every string contains only lowercase English letters. Do not sort the characters of a string to determine its group. Build a fixed 26-entry character-count vector and use that vector as the grouping key.

Sorting is permitted only to format the completed groups: sort the strings inside each group, then sort the groups lexicographically by their first string. Return those groups in that deterministic order.

Function

groupAnagrams(strs: String[]) → String[][]

Examples

Example 1

strs = ["eat","tea","tan","ate","nat","bat"]return = [["ate","eat","tea"],["bat"],["nat","tan"]]

Example 2

strs = [""]return = [[""]]

Source note: Source images are source-neutral excerpts of author-reported interview prompts.