Desktop Application Ultimate Desktop Application 5

Question 1

Which approach is recommended for storing sensitive credentials (e.g., API keys) in a desktop application?

Accepted Answer

Use the OS credential store (e.g., Windows Credential Manager, macOS Keychain)

Answer

OS credential stores are encrypted and access-controlled, making them the secure option for storing sensitive credentials in desktop apps.

Question 2

What is the primary advantage of using a virtual DOM in Electron or web-based desktop applications?

Accepted Answer

It minimizes actual DOM updates by diffing the virtual and real DOM, improving rendering performance

Answer

The virtual DOM computes a diff between old and new states and only updates the changed real DOM nodes, reducing expensive reflows and repaints.

Question 3

When implementing auto-update functionality in a desktop application, which protocol is most commonly used to check for and download updates?

Accepted Answer

HTTPS

Answer

HTTPS is used for auto-update checks and downloads because it provides encryption and server authentication, preventing man-in-the-middle attacks.

Question 4

What is the purpose of the Windows Registry in relation to desktop applications?

Accepted Answer

To provide a hierarchical database for system and application configuration settings

Answer

The Windows Registry is a hierarchical database that stores configuration settings for both the OS and installed applications.

Question 5

In a .NET desktop application, what is the difference between Application.Exit() and Environment.Exit()?

Accepted Answer

Application.Exit() gracefully shuts down the message loop; Environment.Exit() terminates the process immediately

Answer

Application.Exit() posts a quit message to the message loop for a clean shutdown, while Environment.Exit() forcefully terminates the process and can skip cleanup code.

Desktop Application Practice Test

Desktop Application Practice Test

Desktop Application Ultimate Desktop Application 5