Based on the exhibits, what is the outcome of this Invoke Method activity?

A developer wants to add items to a list of strings using the Invoke Method activity.

The list is declared as follows:

The Invoke Method includes the following properties:

The Parameters property is as follows:

Based on the exhibits, what is the outcome of this Invoke Method activity?
A . Invoke Method activity will throw an error.
B . Colors will contain items in the following order: "Yellow", "Red", "Green".
C . olors will contain items in the following order: "Red", "Green", "Yellow".
D . Colors will contain items in the following order: "Red", "Green".

View Answer

Answer: C

Explanation:

The Invoke Method activity is used to execute a method of a class or an object1. In this case, the developer wants to add items to a list of strings using the Add method of the List class2. The list is declared as Colors and initialized with two items: “Red” and “Green”.

The Invoke Method activity has the following properties:

TargetObject: Colors (the list variable)

MethodName: Add (the method of the List class)

Parameters: Direction – In, Type – String, Value – “Yellow” (the item to be added to the list)

Based on these properties, the Invoke Method activity will add the string “Yellow” to the end of the Colors list. Therefore, the outcome of this Invoke Method activity is that Colors will contain items in the following order: “Red”, “Green”, “Yellow”.

Option A is incorrect because the Invoke Method activity will not throw an error, as the properties are configured correctly. Option B is incorrect because the order of the items in the list will not change, as the Add method appends the item to the end of the list. Option D is incorrect because the list will have three items, not two, as the Add method does not overwrite any existing item.

Reference: Invoke Method activity documentation from UiPath

List<T>.Add(T) Method documentation from Microsoft