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Questions and Answers
Match the Python keyword with its purpose.
Allows a loop to be stopped completely = break Simply acts as a placeholder. = pass
- = - Allows a loop to stop the current iteration of a loop and continue with the next one. = continue
Match the mathematics function from the math module with its description.
Rounds a value down to the closest integer, but returns a float. = math.floor() Rounds a value up to the closest integer, but returns a float. = math.ceil() Receives two values. Raises the first value to the power of the second value. Returns the result as a float. = math.pow() n/a = n/a
Match the format character with what it represents.
floating-point = f floating-point with ? number of floating-point digits = .?f exponent (scientific) notation = e hexadecimal with lowercase letters = x
Match the description of the file mode to its designation.
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Which one of the following is not an object or method in the socket module?
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Which of the following port numbers is not a valid / recommended listening port when working with sockets?
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Match the machine learning algorithm/type to its description.
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Match the machine learning algorithm/type to its description.
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Study Notes
Python Keywords
- Keywords are reserved words in Python that have a special meaning, defining the syntax structure of code.
- They include control flow statements (e.g.,
if,for), data type definitions (e.g.,int,str), and function definitions (e.g.,def,return).
Mathematics Functions in Math Module
- The
mathmodule provides mathematical functions such as:-
sqrt(x): Returns the square root of x. -
pow(x, y): Returns x raised to the power of y. -
factorial(n): Returns the factorial of an integer n. -
sin(x),cos(x),tan(x): Return the sine, cosine, and tangent of x (in radians).
-
Format Characters
- Format characters in Python are used for string formatting:
-
%d: Represents integer values. -
%f: Represents floating-point numbers. -
%s: Represents string values. -
%x: Represents integers in hexadecimal format.
-
File Modes in Python
- File modes dictate how a file is accessed:
-
r: Read mode; opens a file for reading (default). -
w: Write mode; opens a file for writing (overwrites existing files). -
a: Append mode; opens a file for appending new data. -
rb,wb,ab: Binary modes for reading, writing, and appending, respectively.
-
Socket Module
- The socket module provides low-level networking interfaces:
- Common objects include
socket(),bind(),listen(), andaccept(). - Typical methods include
connect(),send(), andrecv().
- Common objects include
Listening Ports
- Valid listening ports are typically within the range of 1024-49151 for user applications.
- Common reserved ports include well-known services (e.g., 80 for HTTP, 443 for HTTPS).
Machine Learning Algorithms
- Common types of machine learning algorithms include:
- Supervised Learning: Involves training on labeled data to predict outcomes.
- Unsupervised Learning: Involves identifying patterns in unlabeled data.
- Reinforcement Learning: Involves agents that learn optimal actions through trial and error.
General Knowledge
- Recognize popular libraries for machine learning such as TensorFlow and Scikit-learn, which provide tools for different types of algorithms and applications.
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