Multiple Browsers MCQs

100 MCQs  (Page 3 of 10)

What is browser fingerprinting?
Logging in with a fingerprint scanner
Encrypting cookies
Identifying a user by combining many browser and device characteristics, without needing cookies
Signing extensions
What does DNS over HTTPS (DoH) in browsers do?
It encrypts DNS lookups inside HTTPS, so on-path observers cannot read them easily
It blocks cookies
It makes websites load without DNS
It replaces HTTPS
What does the padlock icon in the address bar guarantee?
The site is safe and not a phishing site
The connection to the site is encrypted (HTTPS), not that the site is trustworthy
The site has no malware
The site is owned by a government
What is the same-origin policy?
Cookies are shared between all sites
Scripts from one origin (scheme, host, and port) cannot freely read data from another origin
Only one tab can be open per site
Two sites cannot share the same IP address
Who enforces CORS (Cross-Origin Resource Sharing) restrictions?
The firewall
The browser, based on headers sent by the server
The DNS server
The web server alone
What happens when an HTTPS page loads a script over plain HTTP?
Modern browsers block it as active mixed content
The browser asks the user every time
It loads normally
The browser upgrades it to HTTP/2
What does HSTS (HTTP Strict Transport Security) tell the browser?
To disable cookies
To cache the site permanently
To use HTTP/1.1 only
To always use HTTPS for that domain for a set period, refusing plain HTTP connections
Do browsers support HTTP/2 over plain (unencrypted) HTTP?
Only for images
Yes, all of them
No; major browsers support HTTP/2 only over TLS (HTTPS)
Only Firefox does
What does a browser certificate warning such as NET::ERR_CERT_DATE_INVALID indicate?
There is no internet connection
The site's TLS certificate has expired or the computer's clock is wrong
The site is down
The cookies are blocked
Which manifest version is Chrome's current extension platform?
Chrome has no extension manifest
Manifest V1
Manifest V2
Manifest V3