Web Programming Web Programming 4

Question 1

What is 'hoisting' in JavaScript?

Accepted Answer

JavaScript's behavior of moving declarations to the top of their scope before execution

Answer

Hoisting moves variable and function declarations to the top of their scope during the compilation phase, before code runs.

Question 2

Which CSS pseudo-class targets the first child element of its parent?

Accepted Answer

:first-child

Answer

:first-child selects an element only if it is the first child of its parent, regardless of element type.

Question 3

What is the role of a 'package.json' file in a Node.js project?

Accepted Answer

Lists project metadata, dependencies, and scripts

Answer

package.json is the project manifest that tracks dependencies, scripts, version, and other metadata for Node.js projects.

Question 4

In a RESTful API, what does a 404 status code response indicate?

Accepted Answer

The requested resource was not found

Answer

404 Not Found means the server could not locate the resource at the requested URL.

Question 5

What is the purpose of the 'z-index' property in CSS?

Accepted Answer

Controls the stacking order of positioned elements on the z-axis

Answer

z-index controls which overlapping element appears on top by defining its position along the z-axis (depth).

Web Programming Practice Test