Can you remove the whitespaces from the string "aaa bbb ccc ddd eee"?

Peer-reviewed by HireXTech Technical Panel • Updated for 2025/2026 hiring • Editorial standards

Interviewer Expectations for this Question

Core Competency

Assesses fundamental understanding of Python conventions, runtime behavior, and memory/performance considerations.

Evaluation Criteria

Hiring managers look for precision, avoidance of ambiguous jargon, and ability to explain trade-offs under real production conditions.

Comprehensive Model Answer Verified Solution

I can think of three ways to do this.

Using join-

>>> s='aaa bbb ccc ddd eee'

>>> s1=".join(s.split())

>>> s1

'aaabbbcccdddeee'

Using a list comprehension–

>>> s='aaa bbb ccc ddd eee'

>>> s1=str(".join(([i for i in s if i!=' '])))

>>> s1

'aaabbbcccdddeee'

Using replace()-

>>> s='aaa bbb ccc ddd eee'

>>> s1 = s.replace(' ',")

>>> s1

'aaabbbcccdddeee'

Start with a concise one-sentence summary: Deliver a direct, confident answer first before expanding into nuances.
Demonstrate real-world trade-offs: Discuss where this approach excels and when you would avoid it in production systems.
Discuss complexity & edge cases: Proactively explain time/space complexity or boundary conditions (null values, scale limits).
Prepare for interviewer follow-ups: Technical hiring panels frequently probe deeper into concurrency, backward compatibility, or alternative libraries.

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