Summary: Python Programming

Read the summary and the most important questions on Python programming

• 1 Basic concepts of programming

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• Where does the CPU (Central Processing Unit) consist and their function?

  1. Memory Unit: temporarily stores data during processing. 
     
  2. Control Unit: manages the flow of data and instructions
  3. Arithmetic Logic Unit (ALU): performs calculations and logical operations

• What is the difference between input Unit and output unit?

  The input unit are devices like keyboards, mice and scanners and the output units are devices like monitors, printers and speakers or produce the results of the processed data.

• What is the difference between hardware and software?

  Hardware refers to the physical parts of the computer (CPU, memory, storage devices) while software refers to the programs and applications that tell the computer what to do (such as a operating system macOS or apps/games)

• What is a algorithm in programming?

  An Algorithm is a sequence of instructions that a computer must perform to solve a problem.

• 1.1 Errors

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• Which three errors can occur in a program?

  1. Syntax errors
     
  2. Runtime error
  3. Semantic errors

• What are syntax errors?

  Python can only execute a program if the program is syntactically correct, otherwise the process fails and returns an error message (syntax errors).

• What are runtime errors in programming?

  Runtime errors occur when you run the program while the code has successfully compiled. These can happen when there is an invalid operation, unexpected condition or incorrect logic, causing it to crash.

• What are semantic errors?

  When you have a semantic error your program wil run successfully but will not generate any error messages, but it will not do the right thing. (The program you wrote is not the program you wanted to write)

• 2 Python programming

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• What is print() in python?

  This is a built in function that instructs the computer to display text on the screen. 
  

  • print = ("Hello, World!")
    

• What are comments in Python?

  These are lines after a # , that are ignored by the interpreter during the execution of the program but can be used to enhance the readability of the code or can be used to prevent executing any specific parts of a code, while making changes or testing.