Ryan Marcus RyanMarcus

Please Read

These questions are representative of the ones that will be on the final exam. We will select around 10% to 20% of them for the exam. Note that we will possibly tweak the questions a little so some may not be not identical.

Here are the resources you should use for studying in addition to these sample questions:

The source code from the class demonstrations which you can find here: https://github.com/Cosi-12b

The complete set of slides from class: https://drive.google.com/a/brandeis.edu/folderview?id=0B2SSgva8RXyFNDdTY2hFeDNNRG8&usp=sharing

In the pursuit of some nice-looking, functional-feeling Python code, I'm wondering how to bind a set of names to the result of applying a function to their currently bound values. Consider this code:

# preamble
a = [4]
b = [5]
c = [6]

# code
a = len(a)

b = len(b)

COSI 132 Lab 1: Joins

Due date: TBD

Introduction

In this lab, you'll get experience using SQL to perform basic join operations on a small dataset. This lab will show you how a relational data model, combined with a powerful query processing language, can greatly simplify finding answers to complex questions.

Instead of installing a full-fledged DBMS on your machine, we'll be using https://www.db-fiddle.com, an interactive and web-based SQL interface.

Instructions

Lab 2: Inverted Index

Due: March 2nd, 11:55PM

In this lab, you'll make an inverted index from a subset of the Wikipedia dataset. As a reminder, an inverted index maps each term in a document (e.g., "alligator", "Ryan") to a set of documents in which that term appears. An example inverted index might look like:

penguin -> 91, 12, 58, 10
rhino -> 184, 182, 87, 10

Separate scripts into their own files

Scripts should moved into their own files instead of embedding them directly inside of the HTML. For example, if you move your JavaScript into a file called fragmentViz.js, then you can include it in an html page like this:

<script src="fragmentViz.js"></script>

Use `const` and `let`

In modern JavaScript, var has been replaced with const and let. For example, instead of writing:

	import numpy as np
	from matplotlib import pyplot as plt

	N = 3

	def get_basis(idx):
	x = (idx // (N - 1)) + 1
	y = (idx % (N - 1)) + 1

	sin = np.sin(2 * np.pi * x * np.arange(N2) / N2)

	import numpy as np
	from matplotlib import pyplot as plt
	import itertools

	np.set_printoptions(precision=4, suppress=True)


	def all_waves(N):
	for i in itertools.count():
	k = i + 1

	import numpy as np
	from matplotlib import pyplot as plt
	import itertools

	np.set_printoptions(precision=4, suppress=True)


	def all_waves(N):
	for i in itertools.count():
	k = i + 1