Intern · Online Assessment · Coding

Amazon — Intern

Level: Intern

Round: Online Assessment · Type: Coding · Difficulty: 4/10 · Duration: 60 min · Interviewer: Neutral

Topics: Algorithms

Location: Seattle, WA, US

Interview date: 2026-01-20

Summary

Two coding questions were asked during the online assessment.

Details

Two leetcode coding questions

• LeetCode 56: Merge Intervals

` from typing import List

class Solution: def merge(self, intervals: List[List[int]]) -> List[List[int]]: if not intervals: return []

    intervals.sort(key=lambda x: x[0])
    merged = [intervals[0]]

    for start, end in intervals[1:]:
        last_end = merged[-1][1]

        if start <= last_end:
            merged[-1][1] = max(last_end, end)
        else:
            merged.append([start, end])

    return merged

`

• LeetCode 387: First Unique Character in a String

` from collections import Counter

class Solution: def firstUniqChar(self, s: str) -> int: count = Counter(s)

    for i, ch in enumerate(s):
        if count[ch] == 1:
            return i

    return -1

`

LeetCode similar: LeetCode 56, LeetCode 387