Evaluating Mathematical, Relational, and Logical Expressions Examples
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Questions and Answers

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

  • Real numbers
  • Integers (correct)
  • Logical data
  • Character data

What are integers?

  • Numbers that can be used in logical operations
  • Numbers with decimal points
  • Numbers represented by characters
  • Whole numbers (correct)

Which data type includes all types of numbers?

  • Real numbers (correct)
  • Logical data
  • Character data
  • Integers

What must computers be told about each variable or constant?

<p>The data type they belong to (D)</p> Signup and view all the answers

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

<p>Character data (A)</p> Signup and view all the answers

What is the purpose of program files?

<p>Contain the instructions to tell the computer what to do (A)</p> Signup and view all the answers

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

<p>$8$ and $3$ (D)</p> Signup and view all the answers

What is the role of operators in expressions?

<p>Specify how to process the data (A)</p> Signup and view all the answers

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

<p>Processing data through relational operators (B)</p> Signup and view all the answers

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

<p>The mathematical operators used (B)</p> Signup and view all the answers

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

<p>Character data type (D)</p> Signup and view all the answers

What is the set used by the numeric data type?

<p>Set of all base 10 numbers, plus sign, and negative sign (A)</p> Signup and view all the answers

What are the words used by the logical data type?

<p>True and False (B)</p> Signup and view all the answers

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

<p>Numeric data type (D)</p> Signup and view all the answers

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

<p>External storage medium like a hard disk drive (A)</p> Signup and view all the answers

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

<p>Character data (C)</p> Signup and view all the answers

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

<p>True and False (C)</p> Signup and view all the answers

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

<p>An error will occur during program execution (C)</p> Signup and view all the answers

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

<p>Each is treated as a separate character (C)</p> Signup and view all the answers

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

<p>String data (B)</p> Signup and view all the answers

What is a constant in computer programming?

<p>A value that never changes during the processing of instructions (B)</p> Signup and view all the answers

How are variables and constants different in computer programming?

<p>Variables are values that change during processing, while constants do not change. (B)</p> Signup and view all the answers

What is the main purpose of identifiers in programming languages?

<p>To represent what a value stands for (C)</p> Signup and view all the answers

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

<p>An underscore (_) (D)</p> Signup and view all the answers

Which statement about constants is true?

<p>Constants are values that never change during the processing of instructions. (D)</p> Signup and view all the answers

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

<p>Relational expression (A)</p> Signup and view all the answers

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

<p>Logical (C)</p> Signup and view all the answers

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

<p>Logical values (B)</p> Signup and view all the answers

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

<p>Complex numbers (B)</p> Signup and view all the answers

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

<p>Integers and real numbers (B)</p> Signup and view all the answers

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

<p>To test for correctness using actual data (C)</p> Signup and view all the answers

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

<ul> <li>(C)</li> </ul> Signup and view all the answers

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

<p>On the same line (D)</p> Signup and view all the answers

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

<p>To store the result in memory (A)</p> Signup and view all the answers

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

<p>To make decisions based on the result (A)</p> Signup and view all the answers

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

<p>Division (B)</p> Signup and view all the answers

What does it mean to evaluate an expression or equation?

<p>To test for correctness using actual data (A)</p> Signup and view all the answers

When modifying a mathematical expression for computer use, where should operators be placed?

<p>Between variables and constants (C)</p> Signup and view all the answers

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