WGU D278
WGU D278 Exam Study Questions and
Answers UPDATED 2025
What is the purpose of a variable? (L2) -Correct Answer ✔To store data in a named
memory location that can be used and changed during program execution.
How do you save a value to a variable? (L2) -Correct Answer ✔By using the assignment
operator (=), e.g., x = 5 stores the value 5 in variable x.
What is a programming expression? (L2) -Correct Answer ✔A combination of variables,
values, and operators that evaluates to a single result.
What is an identifier? (L2) -Correct Answer ✔The name used to identify a variable,
function, or other element in code.
What constitutes a valid identifier? (L2) -Correct Answer ✔A valid identifier starts with a
letter or underscore, followed by letters, digits, or underscores; it cannot be a keyword.
What is a literal? (L2) -Correct Answer ✔A literal is a fixed value written directly in code,
like 5, 'A', or "hello".
What is an operator? (L2) -Correct Answer ✔An operator is a symbol that performs an
action on one or more operands, such as +, -, or *.
What precedence rules does programming use? (L2) -Correct Answer ✔Operators follow
specific precedence rules; for example, multiplication and division are evaluated before
addition and subtraction.
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How does an integer differ from a float? (L2) -Correct Answer ✔An integer is a whole
number with no decimal, while a float is a number that includes a decimal point.
What happens if you divide two integers? A integer and float? (L2) -Correct Answer
✔Dividing two integers gives a float. Dividing an integer by a float also gives a float.
What happens if you divide a nonzero floating point number by
zero? (L2) -Correct Answer ✔It results in positive or negative infinity, or an error,
depending on the programming language.
How do you convert an item's type? (L2) -Correct Answer ✔By using type casting
functions like int(), float(), or str() to convert between types.
What does the modulo operator do? (L2) -Correct Answer ✔It returns the remainder of
a division, e.g., 7 % 3 equals 1.
What is the difference in a variable and a constant? (L2) -Correct Answer ✔A variable's
value can change; a constant's value stays the same throughout the program.
How does an array work? (L2) -Correct Answer ✔An array stores multiple values of the
same type in a single, indexed collection.
What does index reference? (L2) -Correct Answer ✔An index references the position of
an element in an array, starting at 0.
What is the purpose of each different data type? (L2) -Correct Answer ✔Different data
types (int, float, char, string, etc.) define the kind of data a variable can hold and how it's
used in operations.
WGU D278
WGU D278 Exam Study Questions and
Answers UPDATED 2025
What is the purpose of a variable? (L2) -Correct Answer ✔To store data in a named
memory location that can be used and changed during program execution.
How do you save a value to a variable? (L2) -Correct Answer ✔By using the assignment
operator (=), e.g., x = 5 stores the value 5 in variable x.
What is a programming expression? (L2) -Correct Answer ✔A combination of variables,
values, and operators that evaluates to a single result.
What is an identifier? (L2) -Correct Answer ✔The name used to identify a variable,
function, or other element in code.
What constitutes a valid identifier? (L2) -Correct Answer ✔A valid identifier starts with a
letter or underscore, followed by letters, digits, or underscores; it cannot be a keyword.
What is a literal? (L2) -Correct Answer ✔A literal is a fixed value written directly in code,
like 5, 'A', or "hello".
What is an operator? (L2) -Correct Answer ✔An operator is a symbol that performs an
action on one or more operands, such as +, -, or *.
What precedence rules does programming use? (L2) -Correct Answer ✔Operators follow
specific precedence rules; for example, multiplication and division are evaluated before
addition and subtraction.
WGU D278
, WGU D278
How does an integer differ from a float? (L2) -Correct Answer ✔An integer is a whole
number with no decimal, while a float is a number that includes a decimal point.
What happens if you divide two integers? A integer and float? (L2) -Correct Answer
✔Dividing two integers gives a float. Dividing an integer by a float also gives a float.
What happens if you divide a nonzero floating point number by
zero? (L2) -Correct Answer ✔It results in positive or negative infinity, or an error,
depending on the programming language.
How do you convert an item's type? (L2) -Correct Answer ✔By using type casting
functions like int(), float(), or str() to convert between types.
What does the modulo operator do? (L2) -Correct Answer ✔It returns the remainder of
a division, e.g., 7 % 3 equals 1.
What is the difference in a variable and a constant? (L2) -Correct Answer ✔A variable's
value can change; a constant's value stays the same throughout the program.
How does an array work? (L2) -Correct Answer ✔An array stores multiple values of the
same type in a single, indexed collection.
What does index reference? (L2) -Correct Answer ✔An index references the position of
an element in an array, starting at 0.
What is the purpose of each different data type? (L2) -Correct Answer ✔Different data
types (int, float, char, string, etc.) define the kind of data a variable can hold and how it's
used in operations.
WGU D278
