PCPP-32-101 Preparation & PCPP-32-101 Certification Test Answers

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Python Institute PCPP-32-101 Exam Syllabus Topics:

Section	Objectives
Topic 1: Python Standard Library and Best Practices	- Testing and debugging 1. Debugging techniques 2. Unit testing with unittest/pytest concepts - File and data processing 1. Serialization (JSON, CSV) 2. Working with files and directories
Topic 2: Network Programming and Communication	- Web communication basics 1. HTTP requests and APIs 2. Data exchange formats
Topic 3: Advanced Object-Oriented Programming	- Class design and advanced inheritance 1. Multiple inheritance and MRO 2. Abstract classes and interfaces - Metaprogramming basics 1. Introspection techniques 2. Decorators and class decorators
Topic 4: GUI Programming	- Tkinter fundamentals 1. Event handling 2. Widgets and layout management

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Python Institute PCPP1 - Certified Professional in Python Programming 1 Sample Questions (Q20-Q25):

NEW QUESTION # 20
Select the true statements related to PEP 8 naming conventions. (Select two answers.)

A. Function and variable names should be lower-case with words separated by underscores.
B. Modules should have short names written in CameICase.
C. You should always use self as the first argument to instance methods, and cls as the first argument to class methods.
D. Constants should be written in all lower-case letters with words separated by underscores

Answer: A,D

Explanation:
Explanation
Option A is true because PEP 8 recommends that function and variable names should be lowercase, with words separated by underscores .
Option D is true because PEP 8 recommends that constants should be written in all capital letters with words separated by underscores .
PEP 8 is the official style guide for Python code. It provides guidelines for how to write readable code that follows consistent naming conventions. The aim of PEP 8 is to improve the readability of Python code and make it easier to understand and maintain.
According to PEP 8, variable and function names should be written in all lower-case letters with words separated by underscores, as stated in A. Constants, which are variables whose value is expected to remain constant throughout the code, should be written in all upper-case letters with words separated by underscores, as stated in D.
References:
* PEP 8 -- Style Guide for Python Code: https://www.python.org/dev/peps/pep-0008/
* Python Documentation: https://docs.python.org/3/tutorial/classes.html#classmethods-and-staticmethods

NEW QUESTION # 21
Select the true statements about the sqirte3 module. (Select two answers.)

A. The special name memory is used to create a database in RAM.
B. The sqlite3 module provides an interface compliant with the DB-API 2.0.
C. The fetchall method returns an empty list when no rows are available
D. The sqhte3 module does not support transactions.

Answer: A,B

Explanation:
Explanation
The sqlite3 module in python provides an interface compliant to the DB-API 2.0. Thus, it follows a standard performance metric that allows for consistency in database programming with python.
The special name 'memory' is used to create a database in RAM using the sqlite3 module. Thus, when you use it as the name of the database file while opening a connection, it creates a temporary database that exists only in memory.

NEW QUESTION # 22
Select the true statements about the following invocation:

(Select two answers.)

A. It addresses a service whose timeout is set to 3000 ms.
B. It addresses a service located at the following address local.host.com.
C. It addresses a service listening at port 3000.
D. It addresses a service deployed at localhost (the host where the code is run).

Answer: C,D

Explanation:
A). It addresses a service deployed at localhost (the host where the code is run).
This statement is true because localhost is a special hostname that refers to the local machine or the current host where the code is run. It is equivalent to using the IP address 127.0.0.1, which is the loopback address of the network interface. By using localhost as the hostname, the invocation addresses a service that is deployed on the same machine as the client.
D). It addresses a service listening at port 3000.
This statement is true because port 3000 is the part of the URL that follows the colon after the hostname. It specifies the port number where the service is listening for incoming requests. A port number is a 16-bit integer that identifies a specific process or application on a host. By using port 3000, the invocation addresses a service that is listening at that port.
B). It addresses a service whose timeout is set to 3000 ms.
This statement is false because timeout is not a part of the URL, but a parameter that can be passed to the requests.get () function in Python. Timeout specifies how long to wait for the server to send data before giving up. It is measured in seconds, not milliseconds. By using timeout=3, the invocation sets the timeout to 3 seconds, not 3000 ms.
C). It addresses a service located at the following address local.host.com.
This statement is false because local.host.com is not the same as localhost. Local.host.com is a fully qualified domain name (FQDN) that consists of three parts: local, host, and com. It requires DNS resolution to map it to an IP address. Localhost, on the other hand, is a special hostname that does not require DNS resolution and always maps to 127.0.0.1. By using localhost as the hostname, the invocation does not address a service located at local.host.com.
References:
https://docs.python.org/3/library/requests.html : https://en.wikipedia.org/wiki/Localhost : https://en.
wikipedia.org/wiki/Port_(computer_networking) : https://en.wikipedia.org/wiki/Fully_qualified_domain_name

NEW QUESTION # 23
What is a static method?

A. A method decorated with the @method trait
B. A method that works on class objects that are instantiated
C. A method that works on the class itself
D. A method that requires no parameters referring to the class itself

Answer: D

Explanation:
A static method is a method that belongs to a class rather than an instance of the class. It is defined using the @staticmethod decorator and does not take a self or cls parameter. Static methods are often used to define utility functions that do not depend on the state of an instance or the class itself.

NEW QUESTION # 24
Analyze the code and choose the best statement that describes it.

A. The code is responsible for the support of the inequality operator i.e. i =
B. ___ne___() is not a built-in special method
C. The code is erroneous
D. The code is responsible for the support of the negation operator e.g. a = - a.

Answer: A

Explanation:
Explanation
The correct answer is D. The code is responsible for the support of the inequality operator i.e. i != j. In the given code snippet, the __ne__ method is a special method that overrides the behavior of the inequality operator != for instances of the MyClass class. When the inequality operator is used to compare two instances of MyClass, the __ne__ method is called to determine whether the two instances are unequal.

NEW QUESTION # 25
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