20 Browser Compatibility Quiz Questions and Answers

Question 1:
Which of the following browsers does not support the WebP image format natively?
A) Google Chrome
B) Mozilla Firefox
C) Microsoft Edge
D) Apple Safari
Answer: D
Explanation: Apple Safari does not support WebP natively in all versions, requiring conversion or fallbacks, while Chrome, Firefox, and Edge have built-in support.

Question 2:
Which CSS property requires vendor prefixes for older versions of browsers like WebKit?
A) display: flex;
B) border-radius;
C) animation;
D) opacity;
Answer: C
Explanation: The animation property often required prefixes like -webkit-animation for older Safari and Chrome versions to ensure compatibility.

Question 3:
In which browser might you need to use a polyfill for the Array.prototype.includes() method?
A) Google Chrome (latest)
B) Mozilla Firefox (latest)
C) Internet Explorer 11
D) Microsoft Edge (latest)
Answer: C
Explanation: Internet Explorer 11 does not support Array.prototype.includes(), so a polyfill is needed, whereas modern browsers like Chrome, Firefox, and Edge support it natively.

Question 4:
Which of the following HTML5 features is not supported in Internet Explorer 8?
A)

Question 5:
For responsive design, which media query might not work consistently in older versions of Opera Mini?
A) @media (max-width: 600px)
B) @media (orientation: landscape)
C) @media (min-height: 500px)
D) All of the above
Answer: D
Explanation: Older versions of Opera Mini have limited support for media queries, potentially breaking responsive designs that rely on max-width, orientation, or min-height.

Question 6:
Which browser engine is used by Safari and requires -webkit- prefixes for some CSS properties?
A) Blink
B) Gecko
C) WebKit
D) EdgeHTML
Answer: C
Explanation: Safari uses the WebKit engine, which often requires -webkit- prefixes for properties like gradients or transitions in older versions.

Question 7:
What is a common issue when using the Fetch API in Internet Explorer?
A) It works perfectly
B) It requires a polyfill
C) It only supports GET requests
D) It has no CORS support
Answer: B
Explanation: Internet Explorer does not support the Fetch API, so developers must use a polyfill like whatwg-fetch to enable it.

Question 8:
Which of the following browsers supports ECMAScript 6 (ES6) features without flags?
A) Internet Explorer 10
B) Google Chrome 50+
C) Opera 12
D) Firefox 20
Answer: B
Explanation: Google Chrome 50 and later versions support ES6 features natively without needing flags, unlike older versions of IE, Opera, or Firefox.

Question 9:
In which browser might flexbox layout cause rendering issues due to bugs in older versions?
A) Safari 5
B) Chrome 80+
C) Firefox 60+
D) Edge 18+
Answer: A
Explanation: Safari 5 has known bugs with flexbox, leading to layout inconsistencies, while newer versions of Chrome, Firefox, and Edge handle it properly.

Question 10:
Which feature detection method is recommended for checking browser support for the Intersection Observer API?
A) Using user agent strings
B) Modernizr library
C) Directly calling the API
D) Checking the browser version
Answer: B
Explanation: Modernizr provides a reliable way to detect support for Intersection Observer, avoiding unreliable methods like user agent strings or version checks.

Question 11:
For SVG animations, which browser may require additional fallbacks for SMIL animations?
A) Chrome
B) Firefox
C) Safari
D) Internet Explorer
Answer: D
Explanation: Internet Explorer does not support SMIL animations in SVG, requiring fallbacks like CSS or JavaScript animations.

Question 12:
Which of the following is a common compatibility issue with the :nth-child pseudo-class in older browsers?
A) Full support in all browsers
B) Not supported in IE8
C) Only works with even numbers
D) Requires JavaScript
Answer: B
Explanation: IE8 does not support the :nth-child pseudo-class, necessitating alternative selectors or polyfills for compatibility.

Question 13:
In mobile browsers, which feature might not be fully supported in Android’s default browser?
A) Web Workers
B) Geolocation API
C) CSS Grid Layout
D) All of the above
Answer: D
Explanation: Older versions of Android’s default browser have limited or no support for Web Workers, Geolocation, and CSS Grid, requiring testing and fallbacks.

Question 14:
Which browser uses the Blink engine and shares compatibility with Chromium-based browsers?
A) Firefox
B) Safari
C) Opera (recent versions)
D) Edge (legacy)
Answer: C
Explanation: Recent versions of Opera use the Blink engine, like Chrome, ensuring better compatibility with Chromium-based features.

Question 15:
For the Web Audio API, which browser might need a prefix or polyfill?
A) Chrome
B) Safari
C) Internet Explorer
D) Firefox
Answer: C
Explanation: Internet Explorer does not support the Web Audio API, while Safari and Firefox may require prefixes in older versions, but Chrome supports it natively.

Question 16:
Which CSS unit might have inconsistent rendering in high-DPI displays across browsers?
A) px (pixels)
B) em
C) vw (viewport width)
D) rem
Answer: A
Explanation: The px unit can render inconsistently on high-DPI screens due to device pixel ratios, whereas relative units like vw or rem are more consistent across browsers.

Question 17:
In which browser is the Promise object not natively supported without a polyfill?
A) Chrome 40+
B) Internet Explorer 11
C) Edge 14+
D) Safari 9+
Answer: B
Explanation: Internet Explorer 11 does not support the Promise object natively, requiring a polyfill for asynchronous operations.

Question 18:
For form validation with the required attribute, which browser might ignore it?
A) Chrome
B) Firefox
C) IE9
D) Edge
Answer: C
Explanation: IE9 does not support the required attribute for form validation, leading to potential issues in cross-browser forms.

Question 19:
Which technique is used to handle differences in event handling between browsers?
A) Using addEventListener
B) Vendor-specific events
C) jQuery library
D) All of the above
Answer: D
Explanation: addEventListener is standard, but older browsers may need attachEvent; libraries like jQuery abstract these differences for compatibility.

Question 20:
For the Canvas API, which browser requires a specific prefix for 2D context in older versions?
A) Chrome
B) Safari (pre-2017)
C) Firefox
D) Opera
Answer: B
Explanation: Older versions of Safari required the -webkit- prefix for Canvas 2D context methods, though it’s not needed in modern versions.