eXtensible Markup Language :Using Python to Access Web Data (Python for Everybody Specialization) Answers 2025

1

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

✅ xml.etree.ElementTree
❌ xml-misc
❌ xml.json
❌ xml2

Explanation: xml.etree.ElementTree is the standard Python library for parsing XML (available in Python 2.x and 3.x).

2

What is the method to cause Python to parse XML that is stored in a string?

✅ fromstring()
❌ parse()
❌ readall()
❌ extract()
❌ xpath()

Explanation: xml.etree.ElementTree.fromstring() parses XML from a string; parse() reads from a file/stream.

3

In this XML, which are the “complex elements”?

✅ person
❌ phone
❌ name
❌ Noah
❌ people

Explanation: A complex element is an element that contains other elements (children). <person> contains <name> and <phone>, so person is the complex element here. (people is a container too but the common teaching example focuses on person as the complex element containing children.)

4

In the following XML, which are attributes?

❌ email
✅ type
❌ name
✅ hide
❌ person

Explanation: type="intl" and hide="yes" are attributes on elements (phone and email). email, name, person are element names, not attributes.

5

Which node is the parent node of node e?

❌ a
✅ c
❌ e
❌ b

Explanation: The direct parent of <e> is <c>.

6

What text value would we find at path /a/c/e?

❌ Y
✅ Z
❌ e
❌ a
❌ b

Explanation: /a/c/e selects the <e> element, whose text is Z.

7

What is the purpose of XML Schema?

❌ A Python program to transform XML files
❌ To transfer XML data reliably during network outages
❌ To compute SHA1 checksums on data
✅ To establish a contract as to what is valid XML

Explanation: XML Schema (XSD) defines the expected structure/types of XML documents — a contract for validity.

8

Given the schema and XML snippet, which tag is incorrect?

Schema expects <age> (lowercase integer); XML has <Age>17</Age>.

❌ lastname
❌ person
❌ dateborn
❌ age
✅ Age

Explanation: Tag names are case-sensitive in XML vs the schema — Age (capital A) does not match age in the schema.

9

What is a good time zone to use when computers are exchanging data over APIs?

❌ Local time of sending computer
❌ Local time of receiving computer
✅ Universal Time / GMT
❌ Local time of sending computer without DST

Explanation: Use UTC (ISO standard) to avoid ambiguity across systems and DST issues.

10

Which of the following dates is in ISO8601 format?

✅ 2002-05-30T09:30:10Z
❌ 2002-May-30
❌ May 30, 2002
❌ 05/30/2002

Explanation: YYYY-MM-DDThh:mm:ssZ is ISO 8601 (UTC indicated by Z).

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