JavaScript Logical Operators Quiz

Logical Operators

• The expression (a && b) will be true if both a and b are true; if a = 10 and b = 20, the expression will be true.
• The Logical OR operator (||) becomes true if at least one of the operands is true.
• The Logical NOT operator (!) negates the operand, converting true to false and vice versa.

Variables and Operators

• If a > b, the result of (a || b) will be a.
• The assignment operator * is not used for simple assignment; it is used for multiplication.
• The -= operator subtracts the value of A from C, so if C = 15 and A = 7, C will be 8.

JavaScript Basics

• alert('Hello, World!') displays a message box with the text "Hello, World!".
• prompt() is used to prompt the user for input in JavaScript.
• Evaluating the expression 5 + 3 * 2 in a JavaScript console gives 11.
• The method name mentioned in the text is not specified.
• Pressing Ctrl + Shift + I opens the developer tools in Chrome.

Conditional Operator and typeof Operator

• The conditional operator in JavaScript is a ternary operator that returns one of two values based on a condition.
• The typeof operator returns the type of its operand, such as number, string, boolean, object, function, undefined, or null.
• If the operand of the typeof operator is a boolean value, it returns "boolean".
• If the operand of the typeof operator is an object, it returns "object".
• The document.write('b is of type = ', typeof a); statement prints "b is of type = " followed by the type of a.

Programming Paradigms

• JavaScript usually runs on the client-side.
• A key benefit of running JavaScript on the client-side is that it reduces the load on the server.
• Imperative programming differs from declarative programming in that imperative programming focuses on steps to accomplish a task, whereas declarative programming focuses on the desired outcome.
• Imperative programs read to the computer as a series of commands.
• JavaScript falls under imperative programming.

Miscellaneous

• Besides number, string, boolean, object, function, undefined, and null, the typeof operator can evaluate to "symbol" or "bigint".
• In the 'Do It Yourself' section, the loop counts up to 10.