Questions and answers for exam Preparation

MCQs

Total Questions : 10

Question 1. The output of the code shown below is:int('65.43')

ImportError
ValueError
TypeError
NameError

Discuss Question

Answer: Option B. -> ValueError

The snippet of code shown above results in a value error. This is because there is an invalid literal for int() with base 10: '65.43'.

Question 2. What is the output of the following piece of code?class A(): def disp(self): print("A disp()")class B(A): passobj = B()obj.disp()

Invalid syntax for inheritance
Error because when object is created, argument must be passed
Nothing is printed
A disp()

Discuss Question

Answer: Option D. -> A disp()

Class B inherits class A hence the function disp () becomes part of class B's definition. Hence disp() method is properly executed and the line is printed.

Question 3. Which of the following statements is true?

The __new__() method automatically invokes the __init__ method
The __init__ method is defined in the object class
The __eq(other) method is defined in the object class
The __repr__() method is defined in the object class

Discuss Question

Answer: Option C. -> The __eq(other) method is defined in the object class

The __eq(other) method is called if any comparison takes place and it is defined in the object class.

Question 4. What is the output of the following piece of code?class Demo: def __init__(self): self.x = 1 def change(self): self.x = 10class Demo_derived(Demo): def change(self): self.x=self.x+1 return self.xdef main(): obj = Demo_derived() print(obj.change()) main()

11
2
1
An exception is thrown

Discuss Question

Answer: Option D. -> An exception is thrown

The derived class method change() overrides the base class method.

Question 5. Which function overloads the == operator?

__eq__()
__equ__()
__isequal__()
none of the mentioned

Discuss Question

Answer: Option A. -> __eq__()

The other two do not exist.

Question 6. What is setattr() used for?

To access the attribute of the object
To set an attribute
To check if an attribute exists or not
To delete an attribute

Discuss Question

Answer: Option B. -> To set an attribute

setattr(obj,name,value) is used to set an attribute. If attribute doesn't exist, then it would be created.

Question 7. Which of these is a private data field?def Demo:def __init__(self): __a = 1 self.__b = 1 self.__c__ = 1 __d__= 1

__a
__b
__c__
__d__

Discuss Question

Answer: Option B. -> __b

Variables such as self.__b are private members of the class.

Question 8. What is the output of the code shown below?def f(x): yield x+1 print("test") yield x+2g=f(9)

Error
test
test1012
No output

Discuss Question

Answer: Option D. -> No output

The code shown above will not yield any output. This is because when we try to yield 9, and there is no next(g), the iteration stops. Hence there is no output.

Question 9. When will the else part of try-except-else be executed?