RCG Global Services Senior Python Developer Interview Questions and Answers

Generators are functions that allow you to iterate over a sequence of values without creating a full list in memory.

• Generators use the yield keyword to return values one at a time

• They are memory efficient as they do not store the entire sequence in memory

• They can be used to generate an infinite sequence of values

• Example: def countdown(n): while n > 0: yield n n -= 1

• Example: for i in countdown(5): print(i)

Decorators are functions that modify the behavior of other functions without changing their source code.

• Decorators are denoted by '@' symbol in Python

• They can be used to add functionality to existing functions

• They can be used to modify the behavior of existing functions

• They can be used to restrict access to certain functions

• They can be used to time the execution of functions