Question
In a recursive subset_sum function, backtrack(index,
current_subset, current_sum), to explore the option of *including* the current element arr[index], which recursive call is correct? def subset_sum(arr, target):   result = []   def backtrack(start, current_subset, current_sum):     if current_sum == target:       result.append(current_subset[:])       return     if current_sum > target or start == len(arr):       return     # Option 1: Include current element     current_subset.append(arr[start])     backtrack(__________) # Line to complete     current_subset.pop() # Backtrack     # Option 2: Exclude current element     backtrack(start + 1, current_subset, current_sum)   backtrack(0, [], 0)   return resultSolution
• Concept: The subset sum problem can be solved using backtracking by exploring two branches at each step: either include the current element or exclude it. • Code Analysis: o The backtrack function takes start (current index), current_subset, and current_sum. o "Option 1: Include current element" means we add arr[start] to current_subset and update current_sum. o The recursive call should then move to the next element (start + 1) and pass the updated current_subset and current_sum. • Explanation of Correct Answer (B): start + 1, current_subset, current_sum + arr[start] o When including arr[start]:  The start index must be incremented to start + 1 to consider the next element in the array.  current_subset is already modified by current_subset.append(arr[start]) before the call, so it's passed as is.  current_sum needs to reflect the addition of arr[start], so it becomes current_sum + arr[start].
An "object" is an instance of a:
Which of the following is a common way to achieve abstraction in OOP?
The bundling of data (attributes) and methods (functions) that operate on the data into a single unit (class), and restricting direct access to some of ...
Which type of polymorphism is achieved through method overloading (where multiple methods have the same name but different parameters)?
The ability of an object to take on many forms, or the ability of a single interface to represent different underlying forms, is known as:
The concept of showing only essential features of an object and hiding the complex implementation details is called:
The ability of an object to take on many forms is known as:
Which special method is automatically called when an object of a class is created, typically used for initializing the object's state?
Which OOP concept allows a class to inherit properties and behaviors from another class?
How is data hiding primarily achieved in OOP?
