Consider the following code. ``python def func(x=0): return x `` With sentence describes the function the best? A function defined like function()...

Question

def func(x=0):
 return x

Options

• Amust be called with exactly one argument.
• Bmay be called with any number of arguments (including zero).
• Cmay be called without any argument, or with just one.
• Dmust be called without arguments.

• A
  2% (1)
• B
  12% (5)
• C
  79% (34)
• D
  7% (3)

Explanation

Option C is correct because x=0 is a default parameter - Python allows you to call func() with no argument (using the default 0) or with exactly one argument like func(5), overriding the default.

Why the distractors are wrong:

• A is wrong - the function never requires an argument since a default is provided.
• B is wrong - func(1, 2) would raise a TypeError; the function only accepts zero or one argument, not any number.
• D is wrong - you can pass an argument; func(42) is perfectly valid.

Memory tip: Think of the = in x=0 as a "safety net" - if no argument is thrown, the net catches it with the default value. A default parameter makes the argument optional, not forbidden and not unlimited.

No community discussion yet for this question.