Explanation
To convert ExtractedDate to a DateTime type, the expression that should be used is:
DateTime.Parse(ExtractedDate)
This expression uses the DateTime.Parse method, which converts a string representation of a date and time to its DateTime equivalent. The DateTime.Parse method can accept different formats of date and time strings, as long as they are supported by the current culture or a specified culture. The DateTime.Parse method returns a DateTime object that represents the date and time value of the string1. For example, if the ExtractedDate variable has the value:
ExtractedDate = "08-22-2022"
Then the expression DateTime.Parse(ExtractedDate) will return a DateTime object with the value:
[08/22/2022 12:00:00 AM]
This DateTime object can then be used to perform a comparison with a different date, such as using the DateTime.Compare method or the comparison operators2.
References: DateTime.Parse Method and How to compare dates in UiPath? from UiPath documentation and forum.

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 Strict Selector option allows you to fine-tune the selector by adjusting the accuracy level and showing all the matches in the UI Explorer. The other options are not available at indication time.
References:
Selectors in UiPath Studio course, Lesson 3: UI Explorer, Topic: Strict Selector Uipath Associate Certification UiRPA Question Latest course, Section 2: UI Automation, Lecture:
Question 10

Explanation
The benefit of using a dictionary is that dictionary keys and values can be of different data types. A dictionary is a collection of key-value pairs, where each key is associated with a value. The key and the value can be of any data type, such as String, Integer, Boolean, Object, etc. This allows for more flexibility and versatility in storing and retrieving data3. For example, a dictionary can store employee ID numbers as the key with associated employee surnames as the value, where the key is of type Integer and the value is of type String. To access the value of a specific key, the syntax dictionaryName(key) can be used4. References: Dictionaries and How to use dictionary? from UiPath documentation and forum.

Explanation
The Object Repository tree structure shows one application with two screens and five UI elements. The application is the top-level node, the screens are the second-level nodes, and the UI elements are the third-level nodes. The UI elements have properties, selectors, and images that define them.
https://docs.uipath.com/studio/docs/about-the-object-repository