Evaluating Mathematical, Relational, and Logical Expressions Examples

38 Questions

Which type of data is the only one that can be used in numeric calculations?

Integers

What are integers?

Whole numbers

Which data type includes all types of numbers?

Real numbers

What must computers be told about each variable or constant?

The data type they belong to

Which data type consists of unorganized facts that go into the computer as input?

Character data

What is the purpose of program files?

Contain the instructions to tell the computer what to do

In the expression $8-3$, what are the operands?

$8$ and $3$

What is the role of operators in expressions?

Specify how to process the data

In an expression involving relational operators, what is the focus?

Processing data through relational operators

What defines the data type of operands and resultants in an expression?

The mathematical operators used

Which data type uses the set of all characters available to the computer?

Character data type

What is the set used by the numeric data type?

Set of all base 10 numbers, plus sign, and negative sign

What are the words used by the logical data type?

True and False

What should any numeric item that needs to be used in calculations be designated as?

Numeric data type

Where are data, information, or programs stored externally for future use?

External storage medium like a hard disk drive

Which data type consists of all single-digit numbers, letters, and special characters placed within quotation marks?

Character data

What values constitute the logical data set discussed in the text?

True and False

In programming, what happens if string data is placed in a variable memory location designated as numeric?

An error will occur during program execution

What is considered when differentiating between upper case and lower case letters in character data?

Each is treated as a separate character

Which of the following is NOT one of the three common data types mentioned in the text?

String data

What is a constant in computer programming?

A value that never changes during the processing of instructions

How are variables and constants different in computer programming?

Variables are values that change during processing, while constants do not change.

What is the main purpose of identifiers in programming languages?

To represent what a value stands for

In computer programming, what must all variable names begin with?

An underscore (_)

Which statement about constants is true?

Constants are values that never change during the processing of instructions.

What type of expression does the programmer evaluate in Example 5?

Relational expression

In Example 6, the programmer evaluates a(n) __________ expression.

Logical

What values does the programmer use to evaluate an equation in Example 7?

Logical values

Which type of data is NOT explicitly mentioned in the examples?

Complex numbers

When evaluating a mathematical expression in Example 4, the programmer would focus on which type of numbers?

Integers and real numbers

What is the purpose of an equation when storing the result of an expression in a computer memory location?

To test for correctness using actual data

Which symbol is used to represent multiplication in a mathematical expression?

In computing, where should all variables, constants, and operators be placed in a mathematical expression?

On the same line

What is the purpose of setting up a numerical expression for computer use?

To store the result in memory

When setting up a relational expression, what is its primary use?

To make decisions based on the result

Which mathematical operation is represented by the symbol '/' in an expression?

Division

What does it mean to evaluate an expression or equation?