MCTS .NET Application Development 3

Question 1

Which design pattern does the .NET event model implement?

Accepted Answer

Observer

Answer

The Observer pattern defines a one-to-many dependency, and .NET events/delegates implement this pattern directly.

Question 2

What is the difference between 'ref' and 'out' parameters in C#?

Accepted Answer

ref requires initialization before the call; out does not

Answer

A ref parameter must be assigned before being passed, while an out parameter must be assigned within the called method.

Question 3

Which ASP.NET Web Forms control renders an HTML <table> and supports paging and sorting?

Accepted Answer

GridView

Answer

GridView renders tabular data with built-in support for paging, sorting, and editing.

Question 4

In .NET threading, what does the 'lock' keyword do?

Accepted Answer

Acquires a mutual-exclusion lock on an object to synchronize access

Answer

The lock statement acquires a monitor lock, ensuring only one thread can execute the enclosed block at a time.

Question 5

What is the purpose of the Global.asax file in an ASP.NET application?

Accepted Answer

It handles application-level and session-level events

Answer

Global.asax contains event handlers for application lifecycle events such as Application_Start and Session_Start.

(MCTS) Microsoft Certified Technology Specialist Practice Test