MCSD MCSD 3

Question 1

Which design pattern provides a single point of access to a class instance and ensures only one instance exists throughout the application?

Accepted Answer

Singleton

Answer

The Singleton pattern restricts a class to a single instance and provides a global access point to that instance.

Question 2

In Azure, which storage type is best suited for storing large amounts of unstructured binary data like images and videos?

Accepted Answer

Azure Blob Storage

Answer

Azure Blob Storage is optimized for storing massive amounts of unstructured data such as text and binary files.

Question 3

What does the 'async' keyword in C# enable when applied to a method?

Accepted Answer

Awaitable asynchronous execution using the Task-based model

Answer

The 'async' modifier enables the use of 'await' inside the method, allowing asynchronous, non-blocking execution using Tasks.

Question 4

In SQL Server, which isolation level prevents dirty reads but still allows non-repeatable reads?

Accepted Answer

Read Committed

Answer

Read Committed prevents dirty reads by only reading committed data but does not prevent non-repeatable reads.

Question 5

Which HTML5 API allows a web application to store key-value pairs locally in the browser with no expiration?

Accepted Answer

LocalStorage

Answer

LocalStorage persists data with no expiration date across browser sessions, unlike SessionStorage which clears on tab close.

MCSD Exam Practice Test