Code From Binary to Python: teacher key

How Coding Works, grade 10 edition, written for 10th grade. Code is written for machines that use only 0 and 1. Compilers, FORTRAN and COBOL, Python, Git and debugging are all part of how programmers work.

Read the book. Print this page for the key.

Questions and answers

1. What does a compiler do?
   • It turns readable code into machine code a computer can run (answer)
   • It records changes to files over time
   • It measures how fast an algorithm is
2. What is a stack?
   • A data structure where the last item added is the first retrieved (answer)
   • A kind of bug in a program
   • A language with no variables
3. What does version control let you do?
   • Go back to a previous state of your files (answer)
   • Run code with no compiler
   • Turn English words into binary
4. A program works in one place but gives a wrong answer because two instructions are in the wrong order. Which kind of bug is that?
   • A syntax error
   • A logic error (answer)
   • A base case
5. Why does a recursive function need a base case?
   • To end the repeating (answer)
   • To name the variables
   • To translate the code
6. In the passage, what does the word recursion mean?
   • A function that calls itself (answer)
   • A comment for people
   • A copy of a file

Words

• recursion: self-calling function
• compiler: code translator
• bits: binary digits
• stack: last-in structure
• debugging: finding mistakes