Exam 2 - November 13

Exam 2 will be Friday November 13 during normal class time in our same room. The exam will be written, no notes, no calculator, just pencil/pen/eraser and paper and will be very similar in format to the previous exam.

Answers

Content

The material covered will be from Day 16 through Day 27. Anything I mentioned in class can potentially be on the exam, and the notes for each day mostly cover what I talked about. Look back at the pages for the lectures to see all the topics, but the highlights are:

• files and data storage: file open, file close, readline, with, looping through the lines in a file, JSON, CSV, databases.

• networking: TCP/IP, protocols, HTTP, difference between HTTP and HTML.

• clustering and machine learning: supervised versus unsupervised learning, k-means clustering.

• OOP: objects, properties, methods, __init__ method, accessing properties, calling methods, inheritance.

• design: top-down versus bottom up.

Example Problems

• Short answer questions about the topics; it is easy to come up with short answer questions by just looking back at the contents of the pages.
• Write a python function which takes as an argument the name of a filename containing python code and counts how many blank lines are contained in the file. Use with to open the file and a for loop to loop through the lines.
• Design a class to represent a fraction (not a floating point number but an actual fraction). What properties would you have? What methods? Do not give python code, but instead discuss the properties and methods and why these methods constitute a good bottom-up design. Which properties/methods should be part of the API and which properties/methods should only be accessed internally? Why would you make some methods accessed only internally?
• I give you some code like some network or class code and ask you to describe what it does.