PCPP1 Practice Test 5 — 10 Questions

Question 1

A developer is writing a Python module and wants to follow PEP 8's recommendations for imports. The module currently has the following imports: `import os`, `import sys`, `import requests`, `from collections import defaultdict`. According to PEP 8, how should these imports be grouped and ordered?

Choose an answer to begin — your selection is scored in the full session.

Accepted Answer

Standard library imports first, then third-party imports, each group separated by a blank line.. PEP 8 specifies that imports should be grouped in the order: standard library, third-party, and local application/library specific. Each group should be separated by a blank line. In the given scenario, `os`, `sys`, and `collections` are standard library, while `requests` is third-party. Therefore, standard library imports should come first, followed by a blank line, then third-party imports.

Answer

All imports should be sorted alphabetically regardless of origin.

Answer

Imports should be placed on separate lines, and no blank lines are needed between groups.

Answer

Third-party imports first, then standard library imports, to highlight external dependencies.

Question 2

Which TWO of the following are required to successfully write a row to a CSV file?

Accepted Answer

An instance of csv.writer.. To write a row to a CSV file with Python's csv module, you must first create an instance of csv.writer (option B), because csv.writer wraps a file-like object and provides the writerow()/writerows() methods that perform the CSV formatting and writing. You also need a file object opened in write mode (option E), such as one returned by open('file.csv', 'w', newline=''), since csv.writer writes to that underlying file object and cannot write to a path or a read-only handle. Option A is not required because the row data can be any iterable (e.g., tuple, generator), not strictly a list of strings, and the values need not all be strings since the writer converts them. Option C is incorrect because there is no csv.close() function; you close the underlying file object (or use a with block), not the csv module. Option D is incorrect because a predefined dialect is optional — csv.writer defaults to the 'excel' dialect if none is supplied.

Answer

A list of strings to write.

Answer

A call to csv.close().

Answer

A predefined dialect.

Question 3

Which THREE of the following are attributes of the 'requests.Response' object?

Accepted Answer

text. Option B (text) is correct because requests.Response.text returns the response body decoded into a Unicode string using the encoding inferred from the HTTP headers or apparent encoding. Option C (status_code) is correct because requests.Response.status_code holds the integer HTTP status code (e.g., 200, 404) returned by the server. Option E (json()) is correct because requests.Response.json() is a method that deserializes the response body from JSON into Python objects (dict/list), raising a JSONDecodeError if parsing fails. Option A (socket) is not a documented attribute of Response; the underlying socket is managed by urllib3 and accessed via raw/connection internals, not as a direct Response attribute. Option D (connect()) is not a Response method; connect() belongs to HTTPAdapter/urllib3 connection handling, not to the Response object.

Answer

socket

Answer

connect()

Question 4

You are developing a Python script that needs to determine the absolute path of a file located in a directory relative to the script's location. You decide to use the os.path module. Which of the following functions should you use to obtain the absolute path without resolving symbolic links?

Accepted Answer

os.path.abspath(). os.path.abspath() computes an absolute path by combining the current working directory with the given path, normalizing it without resolving symbolic links. This matches the requirement. os.path.realpath() would resolve symlinks, os.path.normpath() only normalizes, and os.path.join() only concatenates components. Thus, abspath is the correct choice.

Answer

os.path.normpath()

Answer

os.path.realpath()

Answer

os.path.join()

Question 5

When using the 'requests' library to perform a GET request, which parameter should be passed to the 'params' argument to include query string parameters in the URL?

Accepted Answer

A dictionary. The requests library's params argument accepts a dictionary (or list of tuples) that it URL-encodes and appends as a query string. Passing a dict like {'q': 'python', 'page': 2} produces ?q=python&page=2 automatically. This is the idiomatic and documented usage for GET query parameters.

Answer

A tuple of values

Answer

A single formatted string

Answer

A list of strings

Question 6

When parsing XML with ElementTree, how do you retrieve the text content of an element?

Accepted Answer

element.text. The .text attribute of the Element object holds the text content.

Answer

element.content

Answer

element.value

Answer

element.get_text()

Question 7

You are using configparser.ConfigParser to read a configuration file. You have a file where option names are case-sensitive. How do you ensure the parser respects this casing?

Accepted Answer

parser.optionxform = lambda x: x. By default, ConfigParser converts keys to lowercase. You must override the optionxform method of the parser instance.

Answer

parser = ConfigParser(case_sensitive=True)

Answer

parser.set_case(True)

Answer

parser.read(file, case='preserve')

Question 8

If you define a class with a metaclass that has a custom __call__ method, when is that __call__ method executed?

Accepted Answer

When an instance of the class is created.. The metaclass's __call__ method is invoked whenever the class created by that metaclass is instantiated (i.e., when you call the class name like MyClass()).

Answer

Every time an instance method is called.

Answer

When the metaclass is first imported.

Answer

When the class itself is defined.

Question 9

You are building a configuration manager that reads an INI file. A section contains the key-value pair `timeout = 30`. You need to retrieve the value as an integer, but if the key is missing, you want to get 60 without raising an exception. Which code snippet achieves this using the `configparser` module?

Accepted Answer

config.getint('section', 'timeout', fallback=60). The `getint` method of the `ConfigParser` class retrieves a value and converts it to an integer. It accepts a `fallback` argument that is returned if the key is not found, preventing a `NoOptionError`. This is the standard way to handle optional integer settings in INI files.

Answer

int(config.get('section', 'timeout', fallback=60))

Answer

config['section'].getint('timeout', 60)

Answer

config.getint('section', 'timeout', default=60)

Question 10

You need a color chooser dialog in your application. Which module contains this functionality?

Accepted Answer

tkinter.colorchooser. The 'tkinter.colorchooser' module provides the askcolor() function.

Answer

tkinter.dialogs

Answer

tkinter.colors

Answer

tkinter.widgets