PCAP Exam - Question 120

Question

What is the expected behavior of the following code?

Examice · Accepted Answer

The code will raise a TypeError. The method 'make' in class 'Super' does not return a value, which means it implicitly returns 'None'. Therefore, 'b.doit()' will return 'None'. When trying to add 'a.doit()' which returns '1' to 'None', Python will raise a TypeError as it cannot perform addition between an integer and NoneType.

deckman · Answer

B is the correct answer

Traceback (most recent call last):
  File "main.py", line 17, in <module>
    print(a.doit() + b.doit())
TypeError: unsupported operand type(s) for +: 'int' and 'NoneType'

macxsz · Answer

Outputs error.
Int + NoneType

Siva_2022 · Answer

Option B is the correct answer

seaverick · Answer

#question 120
class Super:
    def make(self):
        pass
    def doit(self):
        return self.make()
    
class Sub_A(Super):
    def make(self):
        return 1
    
class Sub_B(Super):
    pass

a=Sub_A()
b=Sub_B()
print(a.doit())
print(b.doit())
print(a.doit() + b.doit())#TypeError: unsupported operand type(s) for +: 'int' and 'NoneType'

Tested: B. it raises an exception

PCAP Exam - Question 120

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