DataEngPrep.tech
QuestionsPracticeAI CoachDashboardPacksBlog
ProLogin
Home/Questions/Python/Coding/Write code to merge two sorted arrays without using extra space.

Write code to merge two sorted arrays without using extra space.

Python/Codingeasy0.3 min readPremium

**LeetCode 88:** nums1 has size m+n, m elements; nums2 has n. Merge into nums1. Fill from end (k=m+n-1) to avoid overwriting. Compare nums1[i] vs nums2[j], place larger at k. def merge(nums1, m, nums2, n): i, j, k = m-1, n-1, m+n-1 while j >= 0: if i >= 0 and...

🤖 Analyze Your Answer
Frequency
Low
Asked at 1 company
Category
179
questions in Python/Coding
Difficulty Split
127E|24M|28H
in this category
Total Bank
1,863
across 7 categories
Asked at these companies
Goldman Sachs

Why This Question Matters

This easy-level Python/Coding question appears frequently in data engineering interviews at companies like Goldman Sachs. While less common, it tests deeper understanding that distinguishes strong candidates.

How to Approach This

Start by clearly defining the core concept being asked about. Interviewers want to see that you understand the fundamentals before diving into implementation details. Structure your answer with a definition, then explain the practical application with a concise example.

Expert Answer
69 words

LeetCode 88: nums1 has size m+n, m elements; nums2 has n. Merge into nums1. Fill from end (k=m+n-1) to avoid overwriting. Compare nums1[i] vs nums2[j], place larger at k.

def merge(nums1, m, nums2, n):
i, j, k = m-1, n-1, m+n-1
while j >= 0:
if i >= 0 and nums1[i] > nums2[j]:
nums1[k] = nums1[i]; i -= 1
else:
nums1[k] = nums2[j]; j -= 1
k -= 1

This answer is partially locked

Unlock the full expert answer with code examples and trade-offs

Recommended

Start AI Mock Interview

Practice real interviews with AI feedback, track progress, and get interview-ready faster.

  • Unlimited AI mock interviews
  • Instant feedback & scoring
  • Full answers to 1,800+ questions
  • Resume analyzer & SQL playground
Create Free Account

Pro starts at $24/mo - cancel anytime

Just need answers for quick revision?

Download curated PDF interview packs

Interview Packs
1,800+ real interview questions sourced from 5 top companies
AmazonGoogleDatabricksSnowflakeMeta
This answer is in the DE Mastery Vault 2026
1,863 questions with expert answers across 7 categories →

Free: Top 20 SQL Interview Questions (PDF)

Get the most asked SQL questions with expert answers. Instant download.

No spam. Unsubscribe anytime.

Related Python/Coding Questions

easyWhat are traits in Scala, and how are they different from classes?FreemediumWrite a Python function to check if a string is a palindrome.FreeeasyWhat is the difference between a list and a tuple in Python?FreeeasyExplain the difference between shallow copy and deep copy in Python.FreeeasyWrite a Python function to find the first non-repeating character in a string.Free

Want to know if YOUR answer is good enough?

Paste your answer and get instant AI feedback with a FAANG-level improved version.

Analyze My Answer — Free

According to DataEngPrep.tech, this is one of the most frequently asked Python/Coding interview questions, reported at 1 company. DataEngPrep.tech maintains a curated database of 1,863+ real data engineering interview questions across 7 categories, verified by industry professionals.

← Back to all questionsMore Python/Coding questions →