JavaScript Fundamentals Quiz

In JavaScript, single-line comments are written using double forward slashes '//'. Any text following '//' on the same line is ignored by the JavaScript engine.

In JavaScript, there is no separate data type for integers or floating-point numbers. All numbers are represented as double-precision 64-bit binary format IEEE 754 values, which belong to the single primitive type 'number'.

To call or invoke a function in JavaScript, you write the function's name followed by parentheses, which contain any arguments. For example, 'Geekfunc();' successfully executes the function.

The standard method for writing messages or values to the web console in JavaScript is 'console.log()'. Other options like 'print()' or 'console.print()' are either incorrect or perform different actions (such as opening the print dialog).

Words like 'interface', 'throws', and 'short' are reserved keywords in JavaScript (or reserved for future use, especially in strict mode). 'program' is not a reserved keyword and can be freely used as a variable or function name.

In JavaScript, when the '+' operator is used with a number and a string, the number is implicitly coerced into a string. The two strings are then concatenated, so 8 + '8' results in the string '88'.

The standard JavaScript method to display a modal dialog box with a message and an OK button is 'alert()'. Other options like 'alertbox' or 'msgbox' are not valid built-in JavaScript functions.

In HTML documents, JavaScript code must be placed inside the '

Variables declared with the 'var' keyword in JavaScript are function-scoped rather than block-scoped. Because 'var a' is declared inside the function 'geek', it is accessible anywhere within that function, even outside the 'if' block where it was defined.

JavaScript was originally designed and is primarily used as a client-side (browser-side) scripting language. It runs directly within the user's web browser to manipulate the DOM and create interactive user interfaces.