Using Python to Access Web Data Quiz Answers – Networking Funda

All Weeks Using Python to Access Web Data Quiz Answers

This course will show how one can treat the Internet as a source of data. We will scrape, parse, and read web data as well as access data using web APIs. We will work with HTML, XML, and JSON data formats in Python. This course will cover Chapters 11-13 of the textbook “Python for Everybody”.

To succeed in this course, you should be familiar with the material covered in Chapters 1-10 of the textbook and the first two courses in this specialization.

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Using Python to Access Web Data Quiz Answers

Using Python to Access Web Data Week 1 Quiz Answers

Quiz: Regular Expressions

Q1. Which of the following best describes “Regular Expressions”?

  • The way Python handles and recovers from errors that would otherwise cause a traceback
  • A way to calculate mathematical values paying attention to operator precedence
  • A way to solve Algebra formulas for the unknown value
  • A small programming language unto itself

Q2. Which of the following is the way we match the “start of a line” in a regular expression?

  • correcr answer ^
  • str.startswith()
  • \linestart
  • String.startsWith()
  • variable[0:1]

Q3. What would the following mean in a regular expression? [a-z0-9]

  • Match anything but a lowercase letter or digit
  • Match a lowercase letter or a digit
  • Match any number of lowercase letters followed by any number of digits
  • Match an entire line as long as it is lowercase letters or digits
  • Match any text that is surrounded by square braces

Q4. What is the type of the return value of the re.findall() method?

  • A boolean
  • A single character
  • An integer
  • A list of strings
  • A string

Q5. What is the “wild card” character in a regular expression (i.e., the character that matches any character)?

  • *
  • +
  • ?
  • ^
  • $
  • correct answer .

Q6. What is the difference between the “+” and “*” character in regular expressions?

  • The “+” matches at least one character and the “*” matches zero or more characters
  • The “+” matches upper case characters and the “*” matches lowercase characters
  • The “+” matches the beginning of a line and the “*” matches the end of a line
  • The “+” matches the actual plus character and the “*” matches any character
  • The “+” indicates “start of extraction” and the “*” indicates the “end of extraction”

Q7. What does the “[0-9]+” match in a regular expression?

  • Any number of digits at the beginning of a line
  • One or more digits
  • Zero or more digits
  • Any mathematical expression
  • Several digits followed by a plus sign

Q8. What does the following Python sequence print out?

x = 'From: Using the : character'

y = re.findall('^F.+:', x)

print(y)

  • :
  • From:
  • [‘From:’]
  • [‘From: Using the :’]
  • ^F.+:

Q9. What character do you add to the “+” or “*” to indicate that the match is to be done in a non-greedy manner?

  • ++
  • $
  • **
  • ^
  • correct answer ?
  • \g

Q10. Given the following line of text:

From [email protected] Sat Jan  5 09:14:16 2008

What would the regular expression ‘\[email protected]\S+’ match?

Using Python to Access Web Data Week 2 Quiz Answers

Quiz: Networks and Sockets

Q1. What do we call it when a browser uses the HTTP protocol to load a file or page from a server and display it in the browser?

  • SMTP
  • DECNET
  • The Request/Response Cycle
  • Internet Protocol (IP)
  • IMAP

Q2. What separates the HTTP headers from the body of the HTTP document?

  • A blank line
  • A less-than sign indicating the start of an HTML tag
  • Four dashes
  • X-End-Header: true

Q3. What must you do in Python before opening a socket?

  • import tcp-socket
  • open socket
  • import tcp
  • _socket = true
  • import socket

Q4. In a client-server application on the web using sockets, which must come up first?

  • server
  • client
  • it does not matter

Q5. Which of the following is most like an open socket in an application?

  • An “in-progress” phone conversation
  • Fiber optic cables
  • The wheels on an automobile
  • The chain on a bicycle
  • The ringer on a telephone

Q6. What does the “H” of HTTP stand for?

  • HyperText
  • wHolsitic
  • Simple
  • Hyperspeed
  • Manual

Q7. What is an important aspect of an Application Layer protocol like HTTP?

  • How long do we wait before packets are retransmitted?
  • What is the IP address for a domain like www.dr-chuck.com?
  • How much memory does the server need to serve requests?
  • Which application talks first? The client or server?

Q8. What are the three parts of this URL (Uniform Resource Locator)?

http://www.dr-chuck.com/page1.htm

  • Page, offset, and count
  • Protocol, document, and offset
  • Protocol, host, and document
  • Host, offset, and page
  • Document, page, and protocol

Q9. When you click on an anchor tag in a web page like below, what HTTP request is sent to the server?

<p>Please click <a href="page1.htm">here</a>.</p> 

  • GET
  • POST
  • PUT
  • DELETE
  • INFO

Q10. Which organization publishes Internet Protocol Standards?

  • LDAP
  • SCORM
  • IMS
  • SIFA
  • IETF

Using Python to Access Web Data Week 3 Quiz Answers

Quiz :Reading Web Data From Python

Q1. Which of the following Python data structures is most similar to the value returned in this line of Python:

x = urllib.request.urlopen('http://data.pr4e.org/romeo.txt')1 point

  • list
  • regular expression
  • file handle
  • socket
  • dictionary

Q2. In this Python code, which line actually reads the data?

import socket

mysock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)

mysock.connect(('data.pr4e.org', 80))

cmd = 'GET http://data.pr4e.org/romeo.txt HTTP/1.0\n\n'.encode()

mysock.send(cmd) 

while True:    

data = mysock.recv(512)    

if (len(data) < 1):       

break   

print(data.decode())

mysock.close()

  • mysock.recv()
  • socket.socket()
  • mysock.close()
  • mysock.connect()
  • mysock.send()

Q3. Which of the following regular expressions would extract the URL from this line of HTML:

<p>Please click <a href="http://www.dr-chuck.com">here</a></p>

  • href=”(.+)”
  • href=”.+”
  • http://.*
  • <.*>

Q4. In this Python code, which line is most like the open() call to read a file:

import socket 

mysock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)

mysock.connect(('data.pr4e.org', 80))

cmd = 'GET http://data.pr4e.org/romeo.txt HTTP/1.0\n\n'.encode()

mysock.send(cmd) 

while True:    

data = mysock.recv(512)   

if (len(data) < 1):        

break   

print(data.decode())

mysock.close()

  • mysock.connect()
  • import socket
  • mysock.recv()
  • mysock.send()
  • socket.socket()

Q5. Which HTTP header tells the browser the kind of document that is being returned?

  • HTML-Document:
  • Content-Type:
  • Metadata:
  • Document-Type:
  • ETag:

Q6. What should you check before scraping a web site?

  • That the web site supports the HTTP GET command
  • That the web site returns HTML for all pages
  • That the web site only has links within the same site
  • That the web site allows scraping

Q7. What is the purpose of the BeautifulSoup Python library?

  • It allows a web site to choose an attractive skin
  • It optimizes files that are retrieved many times
  • It repairs and parses HTML to make it easier for a program to understand
  • It builds word clouds from web pages
  • It animates web operations to make them more attractive

Q8. What ends up in the “x” variable in the following code:

html = urllib.request.urlopen(url).read()

soup = BeautifulSoup(html, 'html.parser')

x = soup('a')

  • A list of all the anchor tags (<a..) in the HTML from the URL
  • True if there were any anchor tags in the HTML from the URL
  • All of the externally linked CSS files in the HTML from the URL
  • All of the paragraphs of the HTML from the URL

Q9. What is the most common Unicode encoding when moving data between systems?

  • UTF-64
  • UTF-8
  • UTF-16
  • UTF-32
  • UTF-128

Q10. What is the ASCII character that is associated with the decimal value 42?

  • !
  • ^
  • correct answer *
  • +
  • /

Q11. What word does the following sequence of numbers represent in ASCII:

108, 105, 110, 101

  • lost
  • tree
  • ping
  • func
  • line

Q12. How are strings stored internally in Python 3?

  • EBCDIC
  • ASCII
  • Byte Code
  • Unicode
  • UTF-8

Q13. When reading data across the network (i.e. from a URL) in Python 3, what method must be used to convert it to the internal format used by strings?

  • trim()
  • upper()
  • decode()
  • encode()
  • find()

Using Python to Access Web Data Week 4 Quiz Answers

Quiz: eXtensible Markup Language

Q1. What is the name of the Python 2.x library to parse XML data?

  • xml.json
  • xml.etree.ElementTree
  • xml-misc
  • xml2

Q2. Which of the following are not commonly used serialization formats?

  • Dictionaries
  • XML
  • JSON
  • HTTP
  • TCP

Q3. In this XML, which are the “simple elements”?

<people>   

<person>   

<name>Chuck</name>       

<phone>303 4456</phone>    

</person>    

<person>      

<name>Noah</name>       

<phone>622 7421</phone>    

</person></people>

  • person
  • name
  • people
  • Noah
  • phone

Q4. In the following XML, which are attributes?

<person>  

<name>Chuck</name>  

<phone type="intl">     

+1 734 303 4456  

</phone>  

<email hide="yes" />

</person>

  • name
  • hide
  • type
  • email
  • person

Q5. In the following XML, which node is the parent node of node e

<a>  

<b>X</b>  

<c>    

<d>Y</d>   

<e>Z</e>  

</c>

</a>

  • e
  • b
  • c
  • a

Q6. Looking at the following XML, what text value would we find at path “/a/c/e”

<a>  

<b>X</b>  

<c>    

<d>Y</d>    

<e>Z</e>  

</c>

</a>

  • b
  • Z
  • e
  • Y
  • a

Q7. What is the purpose of XML Schema?

  • To establish a contract as to what is valid XML
  • To transfer XML data reliably during network outages
  • To compute SHA1 checksums on data to make sure it is not modified in transit
  • A Python program to tranform XML files

Q8. For this XML Schema:

<xs:complexType name=”person”>  

<xs:sequence>    

<xs:element name="lastname" type="xs:string"/>    

<xs:element name="age" type="xs:integer"/>    

<xs:element name="dateborn" type="xs:date"/>  

</xs:sequence>

</xs:complexType>

And this XML,

<person>   

<lastname>Severance</lastname>   

<Age>17</Age>   

<dateborn>2001-04-17</dateborn>

</person> 

Which tag is incorrect?

  • Age
  • lastname
  • age
  • person
  • dateborn

Q9. What does the “Z” mean in this representation of a time:12002-05-30T09:30:10Z

  • This time is in the UTC timezone
  • The hours value is in the range 0-12
  • The local timezone for this time is New Zealand
  • This time is Daylight Savings Time

Q10. Which of the following dates is in ISO8601 format?

  • 2002-May-30
  • May 30, 2002
  • 2002-05-30T09:30:10Z
  • 05/30/2002

Using Python to Access Web Data Week 5 Quiz Answers

Quiz: REST, JSON, and APIs

Q1. Who is credited with the REST approach to web services?

  • Vint Cerf
  • Bjarne Stroustrup
  • Roy Fielding
  • Leonard Klienrock
  • Daphne Koller

Q2. What Python library do you have to import to parse and handle JSON?

  • import re
  • ElementTree
  • import json
  • BeautifulSoup

Q3. Which of the following is a web services approach used by the Twitter API?

  • CORBA
  • SOAP
  • REST
  • XML-RPC

Q4. What kind of variable will you get in Python when the following JSON is parsed:

{ "id" : "001", 

 "x" : "2",  

"name" : "Chuck"

}

  • A list of tuples
  • A tuple with three items
  • A dictionary with three key / value pairs
  • A list with three items
  • A list with six items

Q5. Which of the following is not true about the service-oriented approach?

  • An application makes use of the services provided by other applications
  • Standards are developed where many pairs of applications must work together
  • An application runs together all in one place
  • Web services and APIs are used to transfer data between applications

Q6. Which of these two web service approaches is preferred in most modern service-oriented applications?

  • SOAP – Simple Object Access Protocol
  • REST – Representational state transfer

Q7. What library call do you make to append properly encoded parameters to the end of a URL like the following:

//maps.googleapis.com/maps/api/geocode/json?sensor=false&address=Ann+Arbor%2C+MI

  • urllib.parse.urlencode()
  • re.match()
  • urllib.urlcat()
  • re.encode()

Q8. What happens when you exceed the Google geocoding API rate limit?

  • The API starts to perform very slowly
  • You cannot use the API for 24 hours
  • You cannot use the API until you respond to an email that contains a survey question
  • Your application starts to perform very slowly

Q9. What protocol does Twitter use to protect its API?

  • SOAP
  • SHA1-MD5
  • PKI-HMAC
  • Java Web Tokens
  • OAuth
  • WS*Security

Q10. What header does Twitter use to tell you how many more API requests you can make before you will be rate-limited?

  • content-type
  • x-rate-limit-remaining
  • x-max-requests
  • x-request-count-down
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Get All Course Quiz Answers of Python for Everybody Specialization

Course 01: Programming for Everybody (Getting Started with Python)

Course 02: Python Data Structures

Course 03: Using Python to Access Web Data

Course 04: Using Databases with Python

Course 05: Capstone: Retrieving, Processing, and Visualizing Data with Python

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