Topic 3.2 Data Types & Variables

Data types can be broken down into two categories. What are the two categories?

• Logical and Physical.

• Hardware and software.

• Primitive and Composite.

• Variables and Function.

What are the three data types supported by JavaScript?

• Function, Array and Boolean.

• Variable, String and Prompt.

• Numeric, Alert and Quotes.

• Numeric, String and Boolean.

Which one of the following statements describes integer numbers?

• Integer numbers are whole and do not contain a decimal point.

• Integer numbers can only be positive.

• Integer numbers can only be negative.

• Integer numbers cannot be expressed in decimal (base 10), octal (base 8) and hexadecimal (base 16).

Which one of the following statements describes floating-point numbers?

• Floating-point numbers can only be positive.

• Floating-point numbers are whole numbers only.

• Floating-point numbers can only be negative.

• Floating-point numbers must contain a decimal point or an exponent specifier.

Which one of the following data types allows the value to contain a decimal point?

• Escape.

• Float.

• Integer.

• String.

What do you call the process of joining strings together?

• Combination.

• Concatenation.

• Conclusion.

• Connection.

Which one of the following statements is FALSE

about JavaScript variables?

• var is used to declare a variable.

• Variable names are not case sensitive.

• Variable names can also start a $ sign.

• Variable names must begin with a letter or the underscore character.

Which one of the following symbols is used in JavaScript to insert special characters?

• &

• *

• \

• /

Which one of the following lines of code shows the correct syntax to represent a string?

• var answer = "10";

• var answer = 10;

• var answer = 3.14;

• var answer = 10*10;

What are variables used for in JavaScript Programs?

• For varying randomly in programs.

• For preventing bugs in programming.

• For inputting values into programs.

• For storing numbers, dates, or other values.