HTML Comments & Characters

1. // This is a comment
2. /* This is a comment */
3. <!-- This is a comment -->
4. <comment>This is a comment</comment>

Correct answer: C

• A — Incorrect: Double forward slashes are commonly used for comments in languages such as JavaScript, not HTML comment syntax.
• B — Incorrect: This is a comment syntax used in CSS and several other languages, not HTML.
• C — Correct: HTML comments begin with <!-- and end with -->.
• D — Incorrect: comment is not a standard HTML element used to create source comments.

Question 2: Which character reference displays the less-than symbol?

1. >
2. <
3. &
4. ©

Correct answer: B — <

• A — Incorrect: > represents the greater-than symbol.
• B — Correct: < represents the less-than symbol.
• C — Incorrect: & represents an ampersand.
• D — Incorrect: © represents the copyright symbol.

Question 3: Which character does & represent?

1. Less-than symbol
2. Greater-than symbol
3. Ampersand
4. Copyright symbol

Correct answer: C — Ampersand

• A — Incorrect: The less-than symbol uses <.
• B — Incorrect: The greater-than symbol uses >.
• C — Correct: & represents the ampersand character.
• D — Incorrect: The copyright symbol uses ©.

Question 4: What is the correct UTF-8 declaration for an HTML document?

1. <meta encoding="UTF-8">
2. <meta charset="UTF-8">
3. <charset>UTF-8</charset>
4. <html charset="UTF-8">

Correct answer: B

• A — Incorrect: encoding is not the attribute used for the HTML meta charset declaration.
• B — Correct: <meta charset="UTF-8"> declares the document's character encoding.
• C — Incorrect: charset is not a standard HTML element.
• D — Incorrect: charset is not declared on the html root element in this way.

Question 5: What does Unicode primarily provide?

1. A CSS layout system
2. A standard for identifying characters using code points
3. A method for compressing images
4. A database query language

Correct answer: B

• A — Incorrect: CSS controls presentation and layout.
• B — Correct: Unicode assigns code points to characters used across many writing systems and for symbols.
• C — Incorrect: Image compression is unrelated to Unicode's primary purpose.
• D — Incorrect: SQL is a language used for working with relational databases.

Question 6: What does the numeric character reference © represent?

1. Registered trademark symbol ®
2. Copyright symbol ©
3. Euro symbol €
4. Check mark ✓

Correct answer: B — Copyright symbol ©

• A — Incorrect: The registered symbol has Unicode code point U+00AE.
• B — Correct: Decimal 169 corresponds to Unicode code point U+00A9, the copyright symbol.
• C — Incorrect: The euro symbol has code point U+20AC.
• D — Incorrect: The check mark has code point U+2713.

Question 7: What is the difference between a Unicode code point and UTF-8?