Understanding JavaScript Operators

What does the AND operator (&&) do in JavaScript?

• The AND operator (&&) returns true if at least one operand is true.

• The AND operator (&&) returns true if both operands are true; otherwise, it returns false.

• The AND operator (&&) is used to concatenate strings in JavaScript.

• The AND operator (&&) always returns true regardless of the operands.

How does the OR operator (||) work in JavaScript?

• The OR operator (||) returns the first falsy value.

• The OR operator (||) only works with boolean values.

• The OR operator (||) returns the first truthy value or the last value if all are falsy.

• The OR operator (||) performs a bitwise operation on numbers.

What is the purpose of the NOT operator (!) in JavaScript?

• The NOT operator (!) inverts the truthiness of a value.

• The NOT operator (!) adds a value to a number.

• The NOT operator (!) converts a string to uppercase.

• The NOT operator (!) checks if a value is null.

What is a shorthand assignment operator? Give an example.

• An example of a shorthand assignment operator is 'x += 5', which adds 5 to the current value of x.

• x =+ 5

• x + 5 = x

• x -= 5

How would you use the AND operator with two conditions?

• Use '||' in programming to combine conditions.

• Use 'OR' in SQL to combine conditions.

• Separate conditions with a comma.

• Use '&&' in programming or 'AND' in SQL to combine conditions.

What is the result of true || false in JavaScript?

• true

• false

• undefined

• null

How do shorthand assignment operators simplify code?

• Shorthand assignment operators simplify code by reducing redundancy and improving readability.

• They eliminate the need for variables altogether.

• They make code harder to understand.

• They increase the number of lines of code.

What is the result of !true in JavaScript?

• null

• true

• undefined

• false

What is the result of false && true in JavaScript?

• true

• false

• undefined

• null

How can you negate a boolean value in JavaScript?

• By using the NOT operator (!).

• By using the AND operator (&&).

• By using the OR operator (||).

• By using the ternary operator.