MEAN Stack Development MCQ 5

Question 1

Which MongoDB index type is most efficient for supporting queries that sort by multiple fields in a specific order?

Accepted Answer

Compound index

Answer

A compound index on multiple fields supports queries that filter or sort by those fields in the indexed order, making it far more efficient than multiple single-field indexes.

Question 2

What is the key difference between Angular's `@ViewChild` and `@ContentChild` decorators?

Accepted Answer

@ViewChild accesses template elements, @ContentChild accesses projected content

Answer

@ViewChild queries elements within the component's own template, while @ContentChild queries elements that are projected into the component via ng-content.

Question 3

In Node.js, what does the `cluster` module allow you to do?

Accepted Answer

Create child processes that share server ports to utilize multiple CPU cores

Answer

The cluster module lets you create worker processes that all share the same server port, enabling a Node.js app to take advantage of multi-core systems.

Question 4

What does the Express.js `app.use()` method do when no path is specified as the first argument?

Accepted Answer

It applies the middleware to every incoming request regardless of path

Answer

When no path is specified, app.use() mounts middleware that executes for every request, regardless of the URL path or HTTP method.

Question 5

Which Angular feature allows you to define template variables that reference DOM elements or component instances within a template?

Accepted Answer

Template reference variables

Answer

Template reference variables (declared with #varName) give you a reference to a DOM element or component instance that you can use elsewhere in the same template.

MEAN - Stack Development Practice Test

MEAN - Stack Development Practice Test

MEAN Stack Development MCQ 5