In the following code that defines the push method for the array-based stack, what is the missing code? def push (self, item): Self.size += 1 A) self.items += 1 B) self.items[ len(self) ] = item C) items[ size ] = len(self.item) D) item = self.items[ self.size + 1 ]

Question

In the following code that defines the push method for the array-based stack, what is the missing code? def push (self, item):
< missing code >
Self.size += 1
A) self.items += 1
B) self.items[ len(self) ] = item
C) items[ size ] = len(self.item)
D) item = self.items[ self.size + 1 ]

Quizplus · Accepted Answer

The missing code should add the item to the top of the stack, which can be done by placing it at the index len(self.items), where len(self.items) is the current size of the stack. Therefore, the correct code would be:

self.items[ len(self.items) ] = item

Choice A is incorrect because it attempts to increment the entire list instead of adding an item to it.
Choice C is incorrect because it attempts to reference a variable size that has not been defined.
Choice D is incorrect because it attempts to access an item at an incorrect index and does not add it to the stack.

In the Following Code That Defines the Push Method for the Array-Based