DataEngPrep.tech
QuestionsBlogStore
Get PDF Bundle
Home/Questions/Python/Coding/Sort and merge arrays

Sort and merge arrays

Python/Codingmedium0.4 min readPremium
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
Pubmatic
Key Concepts Tested
joinpartitionpythonspark
Expert AnswerPremium
76 wordsInterview-ready
**Why Merge Sorted Arrays:** Mergesort's merge step, merge K sorted streams (logs from multiple sources), and combining partitioned data. **Two Arrays:** Two pointers, O(m+n). K arrays: (1) Merge pairwise—O(N log K). (2) Heap of (value, stream_id)—O(N log K). Python: heapq.merge(a, b, c)—lazy, memory-efficient for large streams. **Scalability:** heapq.merge doesn't load all into memory—streams. For Spark: merge sorted part files via sortMerge join....
The complete answer continues with detailed implementation patterns, architectural trade-offs, and production-grade considerations. It covers performance optimization strategies, common pitfalls to avoid, and real-world examples from companies like Pubmatic. The answer also includes follow-up discussion points that interviewers commonly explore.

Continue Reading the Full Answer

Unlock the complete expert answer with code examples, trade-offs, and pro tips - plus 1,863+ more.

Create Free Account - Unlock 30 Answers
Get PDF Bundle - from $21

Or upgrade to Platform Pro - $39

Engineers who used these answers got offers at

AmazonDatabricksSnowflakeGoogleMeta

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

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 →