Python interview questions part 24
Python interview questions part 24
Take as many assements as you can to improve your validate your skill rating
Total Questions: 20
1. What does single-level inheritance mean?
Correct Answer is : A single subclass derives from a single superclass
2. What is the output of the following piece of code? class A: def __init__(self): self.__i = 1 self.j = 5 def display(self): print(self.__i, self.j) class B(A): def __init__(self): super().__init__() self.__i = 2 self.j = 7 c = B() c.display()
Correct Answer is : 45298
3. Which of the following statements isn’t true?
Correct Answer is : The value of a private variable in the superclass can be changed in the subclass
4. What is the output of the following piece of code? class A: def __init__(self,x): self.x = x def count(self,x): self.x = self.x+1 class B(A): def __init__(self, y=0): A.__init__(self, 3) self.y = y def count(self): self.y += 1 def main(): obj = B() obj.count() print(obj.x, obj.y) main()
Correct Answer is : 45352
5. What is the output of the following piece of code when executed in the Python shell? >>> class A: pass >>> class B(A): pass >>> obj=B() >>> isinstance(obj,A)
Correct Answer is : TRUE
6. Which of the following statements is true?
Correct Answer is : The __eq(other) method is defined in the object class
7. Method issubclass() checks if a class is a subclass of another class. True or False?
Correct Answer is : TRUE
8. What is the output of the following piece of code? class A: def __init__(self): self.__x = 1 class B(A): def display(self): print(self.__x) def main(): obj = B() obj.display() main()
Correct Answer is : Error, private class member can’t be accessed in a subclass
9. What is the output of the following piece of code? class A: def __init__(self): self._x = 5 class B(A): def display(self): print(self._x) def main(): obj = B() obj.display() main()
Correct Answer is : 5
10. What is the output of the following piece of code? class A: def __init__(self,x=3): self._x = x class B(A): def __init__(self): super().__init__(5) def display(self): print(self._x) def main(): obj = B() obj.display() main()
Correct Answer is : 5
11. What is the output of the following piece of code? class A: def test1(self): print(" test of A called ") class B(A): def test(self): print(" test of B called ") class C(A): def test(self): print(" test of C called ") class D(B,C): def test2(self): print(" test of D called ") obj=D() obj.test()
Correct Answer is : test of B called
12. What is the output of the following piece of code? class A: def test(self): print("test of A called") class B(A): def test(self): print("test of B called") super().test() class C(A): def test(self): print("test of C called") super().test() class D(B,C): def test2(self): print("test of D called") obj=D() obj.test()
Correct Answer is : test of B called
13. What is the output of the following? k = [print(i) for i in my_string if i not in "aeiou"]
Correct Answer is : prints all characters of my_string that aren’t vowels
14. What is the output of print(k) in the following? k = [print(i) for i in my_string if i not in "aeiou"] print(k)
Correct Answer is : a list of Nones
15. What is the output of the following? my_string = "hello world" k = [(i.upper(), len(i)) for i in my_string] print(k)
Correct Answer is : [(‘H’, 1), (‘E’, 1), (‘L’, 1), (‘L’, 1), (‘O’, 1), (‘ ‘, 1), (‘W’, 1), (‘O’, 1), (‘R’, 1), (‘L’, 1), (‘D’, 1)].
16. Which of the following is the correct expansion of list_1 = [expr(i) for i in list_0 if func(i)] ?
Correct Answer is : list_1 = []
for i in list_0:
if func(i):
list_1.append(expr(i))
17. What is the output of the following? x = [i**+1 for i in range(3)]; print(x);
Correct Answer is : [0, 1, 2].
18. What is the output of the following? print([i.lower() for i in "HELLO"])
Correct Answer is : [‘h’, ‘e’, ‘l’, ‘l’, ‘o’].
19. What is the output of the following? print([i+j for i in "abc" for j in "def"])
Correct Answer is : [‘ad’, ‘ae’, ‘af’, ‘bd’, ‘be’, ‘bf’, ‘cd’, ‘ce’, ‘cf’].
20. What is the output of the following? print([[i+j for i in "abc"] for j in "def"])
Correct Answer is : [[‘ad’, ‘bd’, ‘cd’], [‘ae’, ‘be’, ‘ce’], [‘af’, ‘bf’, ‘cf’]].
