Deck 2: Using Data

Question 1

You declare a Boolean variable by using type ____.

A) char
B) bool
C) int
D) boolean

Answer 1

B

Question 2

In the C# statement moneyString = someMoney.ToString("F3") , the expression F3 is an example of a(n) ____.

A) literal constant
B) standard numeric format string
C) named constant
D) intrinsic type

Answer 2

B

Question 3

In C#, you use the ____ data type to hold a series of characters.

A) int
B) string
C) sbyte
D) char

Answer 3

B

Question 4

+= is the C# ____ operator; it adds the operand on the right to the operand on the left and assigns it to the operand on the left in one step.

A) prefix increment
B) postfix increment
C) add and assign
D) increment and assign

Question 5

The equal sign ( = ) is the C# assignment operator.

Question 6

A(n) ____ arithmetic operator has one argument to the left and another argument to the right of the operator.

A) binary
B) complex
C) composite
D) unary

Question 7

A(n) ____ is a named location in computer memory that can hold different values at different points in time.

A) variable
B) constant
C) literal constant
D) alias

Question 8

someValue++ is an example of the use of the prefix increment operator.

Question 9

An expression containing a(n) ____ operator has a Boolean value.

A) decrement
B) comparison
C) assignment
D) unifying

Question 10

Operator precedence rules ensure that addition and subtraction always take place prior to multiplication, division, or remainder in an expression.

Question 11

If a value is given to a variable at the time it is declared, this is called a(n) ____.

A) definition
B) allocation
C) assignment
D) initialization

Question 12

A ____ is a string of characters that optionally contains fixed text and contains one or more format items or placeholders for variable values.

A) namespace
B) placeholder
C) format string
D) whitespace

Question 13

In arithmetic operations with operands of dissimilar types, a(n) ____ is the automatic conversion of nonconforming operands to a unifying type.

A) implicit cast
B) explicit cast
C) manual cast
D) level cast

Question 14

You can concatenate two strings with the plus ( + ) sign.

Question 15

To purposefully override the unifying type in an arithmetic operation, use a(n) ____ by placing the desired result type in parentheses followed by the variable or constant to be cast.

A) implicit cast
B) automatic cast
C) intrinsic cast
D) explicit cast

Question 16

An escape sequence is used to represent special characters such as a carriage return or a tab, and always begins with a backslash.

Question 17

You use the ____ data type to hold any single character.

A) char
B) string
C) bool
D) int

Question 18

A ____ consists of a pair of curly braces containing a number that indicates the desired variable's position in a list that follows the string.

A) format string
B) whitespace
C) namespace
D) placeholder

Question 19

A prefix or postfix ____ operator reduces a variable's value by 1.

A) increment
B) sub and assign
C) add and assign
D) decrement

Question 20

A(n) ____ number is one that contains decimal positions.

A) integer
B) whole
C) floating-point
D) int

Question 21

Explain how to use the C# shortcut arithmetic operators -= , *= , and /= .

Question 22

How is a named constant different from a variable? How would you create a named constant (and show an example)?

Question 23

A data item is ____________________ when it cannot be changed after a program is compiled.

Question 24

Operators are used to manipulate values in a program. For example, in the expression X + Y, + is an operator. The values that operators use, such as X and Y, are called ____________________.

Question 25

What is a variable declaration, what is its purpose, and what does the declaration include?

Question 26

How can you compare strings using the Compare() method?

Question 27

Giving a value to a variable, as in the statement someVariable = 5 , is called a(n) ____________________.

Question 28

Operators that have only one argument, such as the prefix and postfix increment operators, are called ____________________ operators.

Question 29

What is an enumeration and what are the advantages of creating an enumeration type? Show an example of an enumeration definition.

Question 30

What are the differences between the prefix increment operator and postfix increment operator?

Question 31

As an alternative to the Convert class methods, you can use a(n) ____  method to convert a string to a number.

A) Cast()
B) Parse()
C) Assign()
D) Write()

Question 32

You can use the ____ method to accept user input from the keyboard.

A) Next()
B) NextLine()
C) ReadLine()
D) Input()

Question 33

An instruction to the user to enter data is called a ____.

A) line
B) prompt
C) cue
D) hint

Question 34

What are the three floating-point data types in C#? Briefly describe the characteristics of each type.

Question 35

The ____ method from the Convert class converts a specified value to an 8-bit unsigned integer.

A) ToDecimal()
B) ToSingle()
C) ToInt16()
D) ToByte()

Question 36

A program that accepts console input from the user is a(n) ____ program.

A) interactive
B) static
C) constant
D) better

Question 37

Explain why implicit numeric conversions are necessary and how C# chooses operands to convert.

Question 38

The keyword ____ is used to declare a named constant.

A) final
B) static
C) const
D) fix

Question 39

What are the nine integral data types in C# and how do you decide which is the most appropriate to use in a particular situation?

Question 40

The number of significant digits in a floating point number specifies the mathematical accuracy of the value. A(n) ____________________ data type can hold up to 16 significant digits of accuracy.

Question 42

What is the purpose of the ReadLine() method? How would you use it with a variable of type string ? How would you use it with a variable of type double ?