What Does The *Args Do In Python?
Interviewer Expectations for this Question
01
Core Competency
Assesses fundamental understanding of Python conventions, runtime behavior, and memory/performance considerations.
02
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
We use *args as a parameter in the function header. It gives us the ability to pass N (variable) number of arguments.
Please note that this type of argument syntax doesn't allow passing a named argument to the function.
Example of using the *args:
# Python code to demonstrate
# *args for dynamic arguments
def fn(*argList):
for argx in argList:
print (argx)
fn('I', 'am', 'Learning', 'Python')
The output:
I
am
Learning
Python
Candidate Response Strategy & Interview Tips
- 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.