[Solved] In this Python code, what is the error?class Base: def template(self): self.step1() self.step2() def step1(self): print('Step 1') class Derived(Base): def step2(self):... | LLD

LLD - Behavioral Design Patterns — Part 1

In this Python code, what is the error?

class Base:
    def template(self):
        self.step1()
        self.step2()
    def step1(self):
        print('Step 1')

class Derived(Base):
    def step2(self):
        print('Step 2')

obj = Derived()
obj.template()

AAttributeError because step2 is not defined in Base

BNo error; prints Step 1 and Step 2

CTypeError due to missing step2 argument

DSyntaxError due to missing method

Step-by-Step Solution

Solution:

Step 1: Trace template method calls
template calls self.step1() and self.step2(). step1 exists in Base, step2 only in Derived.
Step 2: Check method resolution
Since template is called on Derived, self.step2() resolves to Derived.step2(), so no error.
Correction:
Actually, step2 is called on Derived instance, so no AttributeError occurs.
Final Answer:
No error; prints Step 1 and Step 2 -> Option B
Quick Check:
Subclass method called correctly = No error; prints Step 1 and Step 2 [OK]

Quick Trick: Methods in subclass override base calls [OK]

Common Mistakes:

MISTAKES

Assuming base must define all methods
Confusing AttributeError with TypeError
Thinking missing method causes syntax error

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In this Python code, what is the error?

Step 1: Trace template method calls

Step 2: Check method resolution

Correction:

Final Answer:

Quick Check:

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