New WGU C173 – Questions With Proper
Solutions
Variable Correct Answer - named item such as X or numPeople
which is used to hold value
Assignment statement Correct Answer - assigns a variable
with a value such as x = 5, statement means X is assigned with 5 and
X keeps the value during subsequent statements until X is assigned
again
Variable declaration Correct Answer - declares a new variable
specifying the variable's name and type
Integer Correct Answer - can hold whole number values like 1,
999, 0, or -25 but not 3.5 or 0.001
Assignment statement Correct Answer - assigns the variables
on the left side of the = with the current value of the right side
expressions Ex: numApples = 8 assigns numApples with the value of
the right side expressions in this case an 8
Expression Correct Answer - may be a number like 80, a
variable name like numApples, or a simple calculation like
numApples + 1, simple calculations can involve standard math
operations like +, -, *, and parentheses as in 2*(numApples -1)
Identifier Correct Answer - A name created by a programmer
for an item like a variable or function, an identified must be a
sequence of letters (a-z, A-Z), underscores (_), and digits (0-9), they
are case sensitive
, Reserved word (or keyword) Correct Answer - word that is
part of the language like integer, Get, or Put, programmer cannot use
reserved word as a identifier
Naming conventions Correct Answer - set of style guidelines
defined by a company, team, teacher, etc., for naming variables.
Two common conventions for distinguishing words in an identifier
are: Correct Answer - Camel case: Lower camel case abuts
multiple words, capitalizing each word except the first, as in
numApples or peopleOnBus.
Underscore separated: Words are lowercase and separated by an
underscore, as in num_apples or people_on_bus.
Expression Correct Answer - a combination of items, like
variables, literals, operators, and parentheses, that evaluates to a
value. Ex: 2 * (x + 1) is an expression. If x is 3, the expression
evaluates to the value 8. Expressions are commonly used on the
right side of an assignment statement, as in y = 2 * (x + 1).
Literal Correct Answer - a specific value in code like a 2
Operator Correct Answer - a symbol that performs a built-in
calculation, like the operator + which performs addition.
An expression evaluates to a value Correct Answer - replaces
the expression. Ex: If x is 5, then x + 1 evaluates to 6, and y = x + 1
assigns y with 6.
An expression is evaluated using the order of standard mathematics,
such order known in programming as precedence rules, listed
below.
Solutions
Variable Correct Answer - named item such as X or numPeople
which is used to hold value
Assignment statement Correct Answer - assigns a variable
with a value such as x = 5, statement means X is assigned with 5 and
X keeps the value during subsequent statements until X is assigned
again
Variable declaration Correct Answer - declares a new variable
specifying the variable's name and type
Integer Correct Answer - can hold whole number values like 1,
999, 0, or -25 but not 3.5 or 0.001
Assignment statement Correct Answer - assigns the variables
on the left side of the = with the current value of the right side
expressions Ex: numApples = 8 assigns numApples with the value of
the right side expressions in this case an 8
Expression Correct Answer - may be a number like 80, a
variable name like numApples, or a simple calculation like
numApples + 1, simple calculations can involve standard math
operations like +, -, *, and parentheses as in 2*(numApples -1)
Identifier Correct Answer - A name created by a programmer
for an item like a variable or function, an identified must be a
sequence of letters (a-z, A-Z), underscores (_), and digits (0-9), they
are case sensitive
, Reserved word (or keyword) Correct Answer - word that is
part of the language like integer, Get, or Put, programmer cannot use
reserved word as a identifier
Naming conventions Correct Answer - set of style guidelines
defined by a company, team, teacher, etc., for naming variables.
Two common conventions for distinguishing words in an identifier
are: Correct Answer - Camel case: Lower camel case abuts
multiple words, capitalizing each word except the first, as in
numApples or peopleOnBus.
Underscore separated: Words are lowercase and separated by an
underscore, as in num_apples or people_on_bus.
Expression Correct Answer - a combination of items, like
variables, literals, operators, and parentheses, that evaluates to a
value. Ex: 2 * (x + 1) is an expression. If x is 3, the expression
evaluates to the value 8. Expressions are commonly used on the
right side of an assignment statement, as in y = 2 * (x + 1).
Literal Correct Answer - a specific value in code like a 2
Operator Correct Answer - a symbol that performs a built-in
calculation, like the operator + which performs addition.
An expression evaluates to a value Correct Answer - replaces
the expression. Ex: If x is 5, then x + 1 evaluates to 6, and y = x + 1
assigns y with 6.
An expression is evaluated using the order of standard mathematics,
such order known in programming as precedence rules, listed
below.
