Cisco Certified DevNet Associate 200-901 Updated Exam

The Model-View-Controller (MVC) design pattern provides several advantages, including the ability to present multiple views of the same data to different user groups and the separation of concerns by dividing the application into three interconnected components.

A. to enable multiple views of the same data to be presented to different groups of users - Correct. MVC allows different views to display the same data, enhancing flexibility and usability. B. to provide separation between the view and the model by ensuring that all logic is separated out into the controller - Correct. MVC promotes the separation of concerns, making the application easier to manage and scale. C. to ensure data consistency, which requires that changes to the view are also made to the model - Incorrect. This is not a primary advantage of MVC; changes to the view do not directly affect the model. D. to ensure that only one instance of the data model can be created - Incorrect. This is not a characteristic or advantage of MVC. E. to provide only a single view of the data to ensure consistency - Incorrect. MVC supports multiple views.

References:

MVC Design Pattern

In version control systems, code review is typically performed before the code is merged into the main branch. The code review process involves evaluating the changes, ensuring they meet the project's coding standards, and identifying potential issues. This process helps maintain code quality and integrity before integration into the larger codebase.

References:

Cisco DevNet Associate Study Guide: Version Control and Code Review (Chapter 6, Section: Best Practices for Version Control).

In JSON (JavaScript Object Notation), data structures are represented using arrays and objects. A Python Tuple, which is an ordered and immutable collection of items, is best represented by a JSON array. JSON arrays are ordered lists of values, making them the closest equivalent to Python Tuples.

Object: In JSON, an object is a collection of key/value pairs.

Array: In JSON, an array is an ordered list of values.

Dict: In Python, a dict (dictionary) is a collection of key/value pairs.

Collection: General term for a group of items.

Thus, a Python Tuple would be represented as a JSON array.

Model-driven programmability offers several benefits:

Model-driven APIs for abstraction and simplification: These APIs provide a higher level of abstraction, making it easier to manage and automate networks.

Models decoupled from transport, protocol, and encoding: This decoupling ensures that the same model can be used with different transport protocols, making the system more flexible and easier to integrate with various technologies.