DataEngPrep.tech
QuestionsBlogStore
Get PDF Bundle
Home/Questions/Python/Coding/Write a Python function to find the maximum value in a list without using the built-in max() function.

Write a Python function to find the maximum value in a list without using the built-in max() function.

Python/Codingeasy0.4 min readPremium
Frequency
Low
Asked at 2 companies
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
AltimetrikInfosys
Interview Pro Tip

Red Flag: Using sorted(lst)[-1]—O(n log n) and unnecessary. Pro-Move: 'I handle empty input explicitly, use a single pass, and mention that for numeric arrays numpy.max is faster due to C implementation.'

Key Concepts Tested
python
Expert AnswerPremium
82 wordsInterview-ready
**Logic**: Init with first element; iterate and update when current > max. **Code**: `def find_max(lst):\n if not lst: return None\n max_val = lst[0]\n for x in lst[1:]:\n if x > max_val: max_val = x\n return max_val`. **Complexity**: O(n) time, O(1) space. **Edge cases**: Empty list (return None or raise); all same values; single element. **Scalability**: Single pass; suitable for iterables (use iterator, not index, for large data)....
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 Altimetrik, Infosys. 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

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 2 companies. 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 →