This technical problem asks the reader to write a Python class that implements a stack using a linked list. The stack should have methods for pushing an integer onto the stack, popping and returning the top element of the stack, and checking if the stack is empty.
About this solution: The candidate's solution correctly implements a stack using a linked list. The push and pop methods work as expected. The is_empty method also works as expected.
This technical problem deals with creating a Python class named "Foo" with an instance variable named "value". The class also has two methods, "double" and "triple", which multiply the value by 2 and 3, respectively.
About this solution: The candidate's solution correctly implements the required functionality. However, the code could be more concise. For example, the double and triple methods could be combined into a single method that takes a multiplier parameter. Additionally, the methods could return the new value instead of modifying the instance variable directly.