Topic 1 TEST review

Front

Boolean is

Back

True/False Value

Answer explanation

Boolean refers to a data type that can hold one of two values: true or false. This makes 'True/False Value' the correct choice, as it accurately describes the fundamental nature of Boolean logic.

Front

Which operator checks if a value is equal to another value?

Back

==

Answer explanation

The operator '==' checks if two values are equal. The single '=' is used for assignment, while '!=' checks for inequality. Therefore, '==' is the correct choice for checking equality.

Front

What data type is "67" ?

Back

string

Answer explanation

The data type "67" is a string because it is enclosed in quotes. In programming, anything within quotes is treated as a string, regardless of its numeric appearance.

Front

What data type is 12.0? Options: string, int, float, boolean

Back

float

Answer explanation

The value 12.0 is a decimal number, which is classified as a float in programming. Unlike integers (int), floats can represent fractional values, making 'float' the correct data type for 12.0.

Front

Which variable correctly stores a string value? Options: greeting = hello, greeting = 81, greeting = "hello", greeting = 45.8

Back

greeting = "hello"

Answer explanation

The correct choice is 'greeting = "hello"' because it uses double quotes to define a string. The other options either lack quotes or contain numeric values, which do not represent strings.

Front

How can you compare if two things are not equal?

Back

!=

Answer explanation

To compare if two things are not equal, the correct operator is '!='. This operator is commonly used in programming languages to denote inequality, while 'not equals' and 'NOT EQUALS' are not standard syntax.

Front

What type of data is the following?: X = "195.67"

Back

String

Answer explanation

The value X = "195.67" is enclosed in quotes, indicating it is a string. Although it represents a number, it is not treated as a float or integer in this context because it is a sequence of characters.

Front

Which data type can store numbers, letters and symbols?

Back

String

Answer explanation

A String data type can store a combination of numbers, letters, and symbols, making it versatile for various types of data. In contrast, Float and Integer are limited to numeric values, while Boolean only stores true/false.

Front

How do you get python to display a message?

Back

print

Answer explanation

In Python, the correct way to display a message is by using the 'print' function. This function outputs the specified message to the console, making it the appropriate choice among the options provided.

Front

Which of these is a valid variable name: 1variable, Variable_1, Variable 1, variable(1)?

Back

Variable_1

Answer explanation

Variable_1 is a valid variable name because it starts with a letter and contains only letters, numbers, and underscores. The other options are invalid due to starting with a number, containing spaces, or using parentheses.