Front End Development Technology & Digital Applications 4

Question 1

Which meta tag is essential for making a web page render correctly on mobile devices?

Accepted Answer

Answer

The viewport meta tag instructs mobile browsers to set the viewport width to the device width and use a 1:1 zoom ratio, enabling responsive layouts.

Question 2

What does HTTPS provide that HTTP does not?

Accepted Answer

Encrypted data transmission using TLS, preventing eavesdropping and tampering

Answer

HTTPS wraps HTTP in TLS (Transport Layer Security) encryption, ensuring data is private and cannot be intercepted or modified in transit.

Question 3

In the context of web performance, what does 'Time to First Byte' (TTFB) measure?

Accepted Answer

The time from a browser request until it receives the first byte of the server's response

Answer

TTFB measures server responsiveness — the elapsed time from the browser sending a request to receiving the first byte of the HTTP response.

Question 4

What is the purpose of the 'Content-Security-Policy' (CSP) HTTP header?

Accepted Answer

Restricting which sources can load scripts, styles, and other resources to prevent XSS attacks

Answer

CSP headers define approved content sources and block unauthorized scripts or resources, mitigating Cross-Site Scripting (XSS) and data injection attacks.

Question 5

What is 'code splitting' in modern JavaScript applications?

Accepted Answer

Dividing the application bundle into smaller chunks loaded on demand

Answer

Code splitting breaks the bundle into smaller pieces so only the code needed for the current route or feature is loaded, improving initial load time.

Front End Development Practice Test

Front End Development Practice Test

Front End Development Technology & Digital Applications 4