MCQ Set 1 O Level - Web Designing and Publishing - JAVSCRIPT AND ANGULAR JS

Explanation

JavaScript code is as easy to be implemented and run. It can be called by using a function or a method)

Explanation

The variables whose values can be changed are called mutable variable types.

Explanation

Generally, X or x denotes hexadecimal values. So, any integer literal that begins with 0X or 0x denotes a hexadecimal number.

Explanation

When the result of a numeric operation is larger than the largest representable number (overflow), the result is a special infinity value, which JavaScript prints as Infinity. Similarly, when a negative value becomes larger than the largest representable negative number, the result is negative infinity, printed as -Infinity. The infinite values behave as you would expect: adding, subtracting, multiplying, or dividing them by anything results in an infinite value (possibly with the sign reversed.

Explanation

Division by zero is not an error in JavaScript: it simply returns infinity or negative infinity. There is one exception, however: zero divided by zero does not have a welldefined value, and the result of this operation is the special not-a-number value, printed as NaN.

Explanation

The not-equal operator !== compares o to null and evaluates to either true or false.

Explanation

a==b returns a true if a and b refer to the same object ,so they are equal, else it returns a false.

Explanation

The function definitions begin with the keyword function followed by an identifier that names the function and a pair of parantheses around a comma-separated list of zero or more identifiers.

Explanation

The function name is optional for functions defined as expressions. A function declaration statement actually declares a variable and assigns a function object to it.