Multiple Choice Questions on Logical Operators in Web Design

📚 Quick Study Guide

• 🔑 Logical operators are used to combine or modify conditions in web design, especially in JavaScript.
• ➕ The AND operator (&&) returns true if both operands are true.
• ➗ The OR operator (||) returns true if at least one operand is true.
• ❗ The NOT operator (!) returns true if the operand is false, and vice versa.
• 🧮 Operator precedence: ! has higher precedence than &&, which has higher precedence than ||.
• ✍️ Example: (x > 5 && y < 10) || z == 0
• 💻 In CSS, logical operators aren't directly used, but the logic is applied through selectors and media queries.

🧪 Practice Quiz

1. Which logical operator returns true only if both conditions are true?
   1. A) OR (||)
   2. B) AND (&&)
   3. C) NOT (!)
   4. D) XOR
2. Which logical operator returns true if at least one condition is true?
   1. A) AND (&&)
   2. B) NOT (!)
   3. C) OR (||)
   4. D) NAND
3. Which logical operator inverts the value of a boolean expression?
   1. A) AND (&&)
   2. B) OR (||)
   3. C) NOT (!)
   4. D) XOR
4. What is the result of true && false?
   1. A) true
   2. B) false
   3. C) 1
   4. D) 0
5. What is the result of true || false?
   1. A) true
   2. B) false
   3. C) 1
   4. D) 0
6. What is the result of !true?
   1. A) true
   2. B) false
   3. C) 1
   4. D) 0
7. In JavaScript, what is the output of (5 > 3 && 2 < 4) || (1 == 0)?
   1. A) true
   2. B) false
   3. C) 1
   4. D) 0