Scripting and Programming -
Foundations - C173 Exam Questions and
Answers
What is an editor? - -A program that allows you to write code
- What is a compiler? - -A program that produces other programs. The
compiler does all the work at once and then runs the new program. We're
translating the code we wrote to computer code all at once. This is often
when we produce an .exe (executable) file.
- What is an interpreter? - -A program that runs code one line at a time.
Instead of converting all of the code at once it runs each line as it's needed.
It interprets that specific line from your code to computer code.
- What is an operator and what does it do? - -An operator takes two
operands (values) and does something with them. It is an object capable of
manipulating a value. If it is a comparison or logical operator it would
compare to see if they are similar or dissimilar. If it is a mathematical
operator it would perform mathematical calculations.
- What is an expression? - -something that has a value.
- What is the difference in a terminal and non-terminal expression? - -A
terminal is a final value, while a non-terminal can be reduced further.
- What is proper Python grammar for making an expression? - -Expression →
Expression Operator Expression
The Expression non-terminal that appears on the left side can be replaced by
an Expression, followed by an Operator, followed by another Expression. For
example, 1 + 1 is an Expression Operator Expression.
- What is a variable? - -a name that refers to a value
- What are the three main types of data covered? How do you declare each
one? - -string is a sequence of characters surrounded by quotes, either single
or double
example: myVar = "string data"
- Integer is a number - -example: myVar = 33
- Boolean is a true or false value - -example: myVar = True
, - What is grammar used for in programming? - -In a programming language
like Python, the code must match the language grammar exactly. When
programming language grammar is not followed the interpreter will return a
Syntax Error message. This means that the structure of the code is
inconsistent with the rules of the programming language.
- How do you change the value of a variable with Python? - -Using the =
character to assign a new value
x=6
x=9
print x # would print out 9
- How to do you join multiple variables together with string data in Python?
What is this called? - -Using the + sign to concatenate the values
- What does it mean to index a string? How do you do that with Python
code? - -This is what we call selecting a sub-sequence of a string. You do this
in Python by specifying the character you want to access by its index
position. Index position begins at 0. For example, this code would print out
the letter J:
name = 'John'
print name[0]
- What does it mean to slice a string? How do you do that with Python code?
- -Slicing is simply obtaining a subset of data from a string. You may have
also heard this called string extraction. You do this in Python by specifying
the index position where you want to begin and where you want to end.
Everything from the starting point up until the end point will be extracted.
For example, this code would print out "Jo":
name = 'John'
print name[0:2]
- + - -concatenate or add
- = - -assignment
- * - -multiply
- - - -subtract
- / - -divide
- % - -Modulos, does division and returns the remainder
Foundations - C173 Exam Questions and
Answers
What is an editor? - -A program that allows you to write code
- What is a compiler? - -A program that produces other programs. The
compiler does all the work at once and then runs the new program. We're
translating the code we wrote to computer code all at once. This is often
when we produce an .exe (executable) file.
- What is an interpreter? - -A program that runs code one line at a time.
Instead of converting all of the code at once it runs each line as it's needed.
It interprets that specific line from your code to computer code.
- What is an operator and what does it do? - -An operator takes two
operands (values) and does something with them. It is an object capable of
manipulating a value. If it is a comparison or logical operator it would
compare to see if they are similar or dissimilar. If it is a mathematical
operator it would perform mathematical calculations.
- What is an expression? - -something that has a value.
- What is the difference in a terminal and non-terminal expression? - -A
terminal is a final value, while a non-terminal can be reduced further.
- What is proper Python grammar for making an expression? - -Expression →
Expression Operator Expression
The Expression non-terminal that appears on the left side can be replaced by
an Expression, followed by an Operator, followed by another Expression. For
example, 1 + 1 is an Expression Operator Expression.
- What is a variable? - -a name that refers to a value
- What are the three main types of data covered? How do you declare each
one? - -string is a sequence of characters surrounded by quotes, either single
or double
example: myVar = "string data"
- Integer is a number - -example: myVar = 33
- Boolean is a true or false value - -example: myVar = True
, - What is grammar used for in programming? - -In a programming language
like Python, the code must match the language grammar exactly. When
programming language grammar is not followed the interpreter will return a
Syntax Error message. This means that the structure of the code is
inconsistent with the rules of the programming language.
- How do you change the value of a variable with Python? - -Using the =
character to assign a new value
x=6
x=9
print x # would print out 9
- How to do you join multiple variables together with string data in Python?
What is this called? - -Using the + sign to concatenate the values
- What does it mean to index a string? How do you do that with Python
code? - -This is what we call selecting a sub-sequence of a string. You do this
in Python by specifying the character you want to access by its index
position. Index position begins at 0. For example, this code would print out
the letter J:
name = 'John'
print name[0]
- What does it mean to slice a string? How do you do that with Python code?
- -Slicing is simply obtaining a subset of data from a string. You may have
also heard this called string extraction. You do this in Python by specifying
the index position where you want to begin and where you want to end.
Everything from the starting point up until the end point will be extracted.
For example, this code would print out "Jo":
name = 'John'
print name[0:2]
- + - -concatenate or add
- = - -assignment
- * - -multiply
- - - -subtract
- / - -divide
- % - -Modulos, does division and returns the remainder
