Podcast
Questions and Answers
What is a key feature of Python that makes it more readable?
What is a key feature of Python that makes it more readable?
- It uses fewer English keywords
- It has more syntactical constructions
- It is a low-level language
- It uses English keywords frequently (correct)
What programming methods does Python support?
What programming methods does Python support?
- Only functional and structured programming
- Only procedural programming
- Functional and structured programming, as well as object-oriented programming (correct)
- Only object-oriented programming
What is a benefit of Python's automatic garbage collection?
What is a benefit of Python's automatic garbage collection?
- It is only available in other languages
- It requires manual memory management
- It frees the developer from worrying about memory management (correct)
- It is slower than manual memory management
What environment variable tells the Python interpreter where to locate module files?
What environment variable tells the Python interpreter where to locate module files?
What is the correct function to convert a string into a floating point number?
What is the correct function to convert a string into a floating point number?
What environment variable is used in Windows to instruct Python to find the first case-insensitive match in an import statement?
What environment variable is used in Windows to instruct Python to find the first case-insensitive match in an import statement?
Which environment variable is used to specify an alternative module search path in Python?
Which environment variable is used to specify an alternative module search path in Python?
Is Python a case-sensitive language?
Is Python a case-sensitive language?
What is the proper Python syntax to close a file?
What is the proper Python syntax to close a file?
What is the output of print str if str = 'Hello World!'?
What is the output of print str if str = 'Hello World!'?
What is the output of print str[2:5] if str = 'Hello World!'?
What is the output of print str[2:5] if str = 'Hello World!'?
What is the output of print str * 2 if str = 'Hello World!'?
What is the output of print str * 2 if str = 'Hello World!'?
What is the output of print list if list = [ 'abcd', 786 , 2.23, 'john', 70.2 ]?
What is the output of print list if list = [ 'abcd', 786 , 2.23, 'john', 70.2 ]?
What is the output of print list[1:3] if list = [ 'abcd', 786 , 2.23, 'john', 70.2 ]?
What is the output of print list[1:3] if list = [ 'abcd', 786 , 2.23, 'john', 70.2 ]?
What is the output of print list[2:] if list = [ 'abcd', 786 , 2.23, 'john', 70.2 ]?
What is the output of print list[2:] if list = [ 'abcd', 786 , 2.23, 'john', 70.2 ]?
What is the Math Operator for Exponentiation in Ruby?
What is the Math Operator for Exponentiation in Ruby?
What is the output of the statement? puts "#{3 + 2}" in Ruby?
What is the output of the statement? puts "#{3 + 2}" in Ruby?
What is the correct syntax to interpret a line of code as a math operation in Ruby?
What is the correct syntax to interpret a line of code as a math operation in Ruby?
In Linux, where is text read or written in emacs?
In Linux, where is text read or written in emacs?
In Ruby, which of the following will output the first item in an array?
In Ruby, which of the following will output the first item in an array?
What does EMACS stand for in Linux?
What does EMACS stand for in Linux?
In Linux, which symbol is used to reference a variable?
In Linux, which symbol is used to reference a variable?
Which of the following is a way to concatenate strings in Ruby?
Which of the following is a way to concatenate strings in Ruby?
What does sudo stand for in Linux?
What does sudo stand for in Linux?
What is the correct way to create a constant with value 3 in Ruby?
What is the correct way to create a constant with value 3 in Ruby?
In Linux, what are wildcard characters known as?
In Linux, what are wildcard characters known as?
What is the term used for things that describe or characterize an object in Ruby?
What is the term used for things that describe or characterize an object in Ruby?
How does Ruby treat numbers and other primitive data types?
How does Ruby treat numbers and other primitive data types?
In Linux, what is the purpose of a comment line?
In Linux, what is the purpose of a comment line?
What is the correct statement about Perl?
What is the correct statement about Perl?
Study Notes
Python Features and Functions
- Python emphasizes readability through its clean, straightforward syntax, which reduces complexity.
- Supports multiple programming paradigms, including procedural, object-oriented, and functional programming.
- Automatic garbage collection simplifies memory management, as it periodically frees up memory by deleting unreferenced objects.
- The
PYTHONPATH
environment variable directs the Python interpreter to locate module files. - The function
float()
is used to convert a string into a floating-point number in Python. - The
PYTHONCASEOK
environment variable allows Python to find the first case-insensitive match during imports. - The
PYTHONPATH
environment variable can also be set to specify alternative module search paths.
String and List Operations in Python
- Python is a case-sensitive language, meaning variable and function names are case-specific.
- Files are closed using the
file.close()
method in Python syntax. - Output of
print(str)
whenstr = 'Hello World!'
isHello World!
. - The output of
print(str[2:5])
forstr = 'Hello World!'
isllo
. - The output of
print(str * 2)
whenstr = 'Hello World!'
isHello World!Hello World!
. - The output of
print(list)
whenlist = ['abcd', 786, 2.23, 'john', 70.2]
is['abcd', 786, 2.23, 'john', 70.2]
. - The output of
print(list[1:3])
for the same list is[786, 2.23]
. - The output of
print(list[2:])
results in[2.23, 'john', 70.2]
.
Ruby Features and Functions
- The exponentiation operator in Ruby is
**
. - The statement
puts "#{3 + 2}"
in Ruby outputs5
, because it evaluates the expression inside the string interpolation. - To interpret a line of code as a math operation in Ruby, the syntax uses standard arithmetic operators.
- In Emacs on Linux, text is read or written in buffers.
- To output the first item in an array in Ruby, one can use
array.first
orarray[0]
. - EMACS stands for "Editor MACro System," a powerful text editor in Linux.
- In Linux, the
$
symbol is used to reference a variable. - Strings in Ruby can be concatenated using the
+
operator or the<<
(shovel) operator.
Linux and General Concepts
sudo
stands for "superuser do," allowing users to execute commands with elevated privileges.- A constant in Ruby can be created with
CONSTANT_NAME = 3
, where the constant name is typically uppercase. - Wildcard characters in Linux are known as "globbing".
- Properties that describe or characterize an object in Ruby are referred to as attributes or methods.
- Ruby treats numbers and other primitive data types as objects, endowing them with methods.
- In Linux, comment lines are used to explain the code, making it easier to understand and maintain.
- Perl is known for its text processing capabilities and supports procedural and object-oriented programming.
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Description
Test your knowledge of Python programming basics with this CIS 109 final exam study guide. Explore the language's features, syntax, and programming methods. Review the correct answers to these multiple-choice questions and improve your understanding of Python.