Explanation
The code in the Invoke Code activity is looping through an array of integers and checking if the current value is greater than the previous value. If it is, the current value is stored in the output variable. Since the last value in the array is 9, this will be the final value of the output variable. (UiPath Studio - Invoke Code - UiPath Academy) References:
Studio - Invoke Code - UiPath Documentation Portal
UiPath Studio - Invoke Code - UiPath Academy

Explanation
The Assign activity is used to assign a value to a variable. In this case, the variable is "qty". The value of the variable will be 80 after executing the Assign activity because the expression in the Assign activity is
"dt.AsEnumerable().Where(Function(x) x("Item").ToString.Equals("mango")).Select(Function(y) y("Quantity")).ToString". This expression is filtering the data table "dt" for rows where the "Item" column is equal to "mango" and then selecting the "Quantity" column from those rows. Since there is only one row in the data table where "Item" is equal to "mango", the value of the "Quantity" column in that row is 80. (UiPath Studio documentation) References:: [Assign - UiPath Activities].

Explanation
The Job Priority field in UiPath Orchestrator is used to specify the priority of a job when it is added to a queue of pending jobs on the same robot. The priority can be set to Low, Medium, High, or Inherited. The Inherited option means that the priority is inherited from the trigger that started the job. When starting a job manually, the default priority value is Medium, which means that the job will be executed after any high-priority jobs and before any low-priority jobs in the queue. (UiPath Orchestrator documentation1) References:
1: Starting a Job - UiPath Orchestrator.

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.
References:
Invoke Method activity documentation from UiPath
List<T>.Add(T) Method documentation from Microsoft

Explanation
Based on the exhibit, the output produced in the Output panel is "Good Morning". This is because the "If" activity checks if the "BoolFlag" variable is True. If it is True, the "Then" branch is executed, which contains a "Write Line" activity with the text "Good Morning". If the "BoolFlag" variable is False, the "Else" branch is executed, which contains a "Write Line" activity with the text "UiPath". Since the "BoolFlag" variable is assigned to True in the previous "Assign" activity, the condition of the "If" activity is satisfied, and the "Then" branch is executed. Therefore, the "Write Line" activity writes "Good Morning" to the Output panel4. References: If and How to put a if condition in assign activity? from UiPath documentation and forum.