Exam PCAP-31-03 topic 1 question 77 discussion

A. lambda lambda: lambda * lambda → SyntaxError ❌ Invalid – lambda is a reserved keyword, so it can't be used as a parameter name. B. lambda x : def fun(x): return x → SyntaxError ❌ Invalid – You can't define a function (def) inside a lambda. C. lambda : 3.1415 → Correct ✅ Valid – A lambda with no parameters returning a float. D. lambda x : None → Correct ✅ Valid – A lambda that takes a parameter and always returns None.

Explanation: A lambda function in Python is an anonymous function that can have zero or more arguments but must consist of a single expression. The correct answers are: C. lambda : 3.1415 This is a valid lambda function with no arguments (lambda :) that always returns 3.1415. D. lambda x : None This is a valid lambda function that takes one argument (x) and always returns None. The incorrect answers are: A. lambda lambda: lambda * lambda The syntax is invalid because lambda is a reserved keyword in Python and cannot be used as a variable name. This will result in a SyntaxError. B. lambda x : def fun(x): return x The syntax is invalid because lambda functions cannot contain statements like def. This will result in a SyntaxError.