161. What is the output of print(type(lambda x: x))?
- a) <class 'function'>
- b) <class 'lambda'>
- c) <class 'expression'>
- d) Error
Answer: A - Lambda functions are regular function objects in Python.
162. Which keyword is used to define a function?
- a) def
- b) function
- c) lambda
- d) func
Answer: A - Functions are defined using
def function_name():.
163. What does print((lambda x: x*2)(5)) output?
- a) 10
- b) 25
- c) 55
- d) Error
Answer: A - The lambda function doubles its input (5*2=10).
164. Which statement immediately exits a function?
- a) return
- b) exit
- c) break
- d) quit
Answer: A -
return exits the function and optionally returns a value.
165. What is the output of def f(x=[]): x.append(1); return x; print(f() + f())?
- a) [1, 1, 1, 1]
- b) [1, 1]
- c) [1] [1]
- d) Error
Answer: A - Mutable default arguments retain changes between calls.
166. Which symbol is used for unpacking argument lists?
- a) *
- b) **
- c) &
- d) @
Answer: A -
* unpacks iterables, ** unpacks dictionaries.
167. What is the output of print([x for x in range(3)])?
- a) [0, 1, 2]
- b) [1, 2, 3]
- c) range(0, 3)
- d) Error
Answer: A - List comprehension generates a list from the range.
168. Which decorator converts a method to a static method?
- a) @staticmethod
- b) @classmethod
- c) @property
- d) @static
Answer: A -
@staticmethod doesn't receive implicit first argument.
169. What does print(list(map(lambda x: x**2, [1,2,3]))) output?
- a) [1, 4, 9]
- b) [1, 2, 3]
- c) [2, 4, 6]
- d) Error
Answer: A -
map() applies the lambda to square each number.
170. Which function applies a function to pairs of elements?
- a) reduce()
- b) map()
- c) filter()
- d) apply()
Answer: A -
reduce() cumulatively applies a function (from functools in Python 3).
171. What is the output of print([x for x in range(5) if x%2==0])?
- a) [0, 2, 4]
- b) [1, 3, 5]
- c) [0, 1, 2, 3, 4]
- d) Error
Answer: A - List comprehension with condition filters even numbers.
172. Which decorator converts a method to a class method?
- a) @classmethod
- b) @staticmethod
- c) @property
- d) @class
Answer: A -
@classmethod receives the class as first argument.
173. What is the output of print(list(filter(lambda x: x>0, [-1,0,1,2])))?
- a) [1, 2]
- b) [-1, 0]
- c) [0, 1, 2]
- d) Error
Answer: A -
filter() keeps only elements where lambda returns True.
174. Which function creates an iterator of tuples from multiple iterables?
- a) zip()
- b) map()
- c) enumerate()
- d) combine()
Answer: A -
zip([1,2], ['a','b']) yields (1,'a'), (2,'b').
175. What does print({x:x**2 for x in range(3)}) output?
- a) {0:0, 1:1, 2:4}
- b) [0, 1, 4]
- c) {0,1,4}
- d) Error
Answer: A - Dictionary comprehension creates key-value pairs.
176. Which function adds a counter to an iterable?
- a) enumerate()
- b) count()
- c) zip()
- d) index()
Answer: A -
enumerate(['a']) yields (0,'a').
177. What is the output of print((x**2 for x in range(3)))?
- a) <generator object>
- b) [0, 1, 4]
- c) (0, 1, 4)
- d) Error
Answer: A - Parentheses create a generator expression, not a tuple.
178. Which function returns a list of results from applying a function?
- a) map()
- b) apply()
- c) filter()
- d) reduce()
Answer: A -
map() applies a function to each item in an iterable.
179. What does print(sorted([3,1,2], reverse=True)) output?
- a) [3, 2, 1]
- b) [1, 2, 3]
- c) [3, 1, 2]
- d) Error
Answer: A -
reverse=True sorts in descending order.
180. Which function returns a list of elements where function returns True?
- a) filter()
- b) map()
- c) reduce()
- d) select()
Answer: A -
filter() includes only elements that satisfy the condition.