PE1: Python Essentials 1 – Module 1 Test Exam Answers Full 100%

PE1: Python Essentials 1 – Module 1 Test Exam Answers Full 100% 2023 and 2024

This is Cisco NetAcad SkillsForAll PE1: Python Essentials 1 – Module 1 Test Exam Answers Full 100% in 2023 and 2024. All answers have been verified by experts.

1. What is true about compilation? (Select two answers)

   • Both you and user must have the compiler to run your code
   • The code is converted directly into machine code executable by the processor
   • It tends to be faster than interpretation
   • It tends to be than interpretation
     

     Explanation & Hint: Compilation: Requires a Compiler: Code written in a compiled language must be translated by a compiler into machine code directly executable by the processor. Faster Execution: Since the code is directly converted to machine code, it tends to run faster. This is because the translation step is done once and ahead of time, resulting in an executable that the computer can run directly. Examples: C, C++, and Rust. Interpretation: Requires an Interpreter: Code in an interpreted language is executed by an interpreter, which reads and executes the code line by line. Slower Execution: Generally, interpreted code runs slower than compiled code because each instruction must be read, interpreted, and then executed on the fly without prior conversion to machine code. Examples: Python, Ruby, and JavaScript. Both methods have their advantages and disadvantages. Compilation provides speed and optimization but lacks flexibility. Interpretation offers more flexibility and ease of testing and debugging at the cost of slower execution speed.

2. What is CPython?

   • It’s the default, reference implementation of the C language, written in Python
   • It’s a programming language that is a supperset of the Python, designed to produce C-like performance with code written in Python
   • It’s the default, reference implementation of Python, written in the C language
   • It’s a programming that is a superset of the C language, designed to produce Python-like performance with code written in C

   • Explanation & Hint: CPython is the default, reference implementation of Python, written in the C language. Here’s a more detailed explanation: Default Python Implementation: CPython is the most widely used implementation of the Python programming language. It is considered the “default” or “reference” version because it is the original and most developed version, against which other implementations are often compared. Written in C: CPython is implemented in the C programming language. This means the core engine that interprets Python code is written in C, which helps it interact efficiently with the underlying hardware. Execution: CPython compiles Python code into bytecode, which is then interpreted by the CPython virtual machine. This process is part of what makes Python relatively easy to use, though it may not be as fast as fully compiled languages like C++. The other descriptions you mentioned sound like hypothetical or incorrect definitions that mix elements of different programming concepts or tools.

3. What are the four fundamental elements that make a language?

   • An alphabet, morphology, phonetics, and semantics
   • An alphabet, a lexis, a syntax, and semantics
   • An alphabet, a lexis, phonetics, and semantics
   • An alphabet, phonetics, phonology, and semantics

   • Explanation & Hint: The fundamental elements that make up a language can vary slightly depending on how language components are categorized, but a common framework includes: Phonetics and Phonology: These elements involve the sounds of a language. Phonetics deals with the physical production, transmission, and reception of speech sounds, while phonology studies how those sounds are used and organized in a particular language. Morphology: This refers to the structure of words. Morphology studies how words are formed from morphemes, which are the smallest grammatical units in a language. Syntax: Syntax is concerned with the rules that govern the structure of sentences, dictating how words and phrases are arranged to convey meaning. Semantics: Semantics involves the meanings of words and sentences. It studies how meaning is conveyed through language, including how different meanings interact and how they are interpreted in context. The options you provided mix different components, some of which (like an alphabet) aren’t universally applicable to all languages, as not all languages are written nor do all written languages use alphabets (some use syllabaries or logograms). The most comprehensive approach to describing the fundamental elements of language typically includes phonetics/phonology, morphology, syntax, and semantics.

4. What do you call a file containing a program written in a high-level programming language?

   • A machine file
   • A code file
   • A target file
   • A source file

   • Explanation & Hint: A file containing a program written in a high-level programming language is typically called a source file. This term is used because the file contains source code, which is written in a form that humans can more easily understand and edit. The source code in the file needs to be compiled or interpreted to be executed by a computer.

5. What do you call a command-line interpreter which lets you interact with your OS and execute Python commands and scripts?

   • An editor
   • A console
   • A compiler
   • Jython

   • Explanation & Hint: The term you’re looking for is console. A console, sometimes referred to as a terminal or command-line interface, allows you to interact with your operating system and execute commands, including running Python scripts and entering Python commands interactively. This tool provides a text-based interface for performing various tasks programmatically.

6. What is the expected behavior of the following program?

   print("Hello!")

   • The program will output ("Hello!") to the screen
   • The program will generate an error message on the screen
   • The program will output Hello! to the screen
   • The program will output "Hello!" to the screen

   • Explanation & Hint: The expected behavior of the program print("Hello!") is: The program will output "Hello!" to the screen. The print statement in Python outputs the content within the parentheses and quotes, including the quotation marks, to the screen or console as formatted within the quotes.

7. What is the best definition of a script?

   • It’s an error message generated by the interpreter
   • It’s an error message generated by the compiler
   • It’s a text file that contains instructions which make up a Python program
   • It’s a text file that contains sequences of zeroes and ones

   • Explanation & Hint: The best definition of a script among the options you provided is: It’s a text file that contains sequences of commands which make up a Python program. A script generally refers to a file containing a sequence of commands written in a scripting language like Python. These commands are executed by an interpreter to perform specific tasks. This description captures the essence of what a script is in the context of programming.

8. What is the expected behavior of the following program?

   prin("Goodbye!")

   • The program will output Goodbye! to the screen
   • The program will generate an error message on the screen 
   • The program will output("Goodbye!")
   • The program will output "Goodbye!"

   • Explanation & Hint: The expected behavior of the program with prin("Goodbye!") is: The program will generate an error message on the screen. The reason for the error is that prin is not recognized as a valid function in Python. The correct function for outputting text to the screen is print. Since prin is a typo or misspelling, Python will raise a NameError indicating that prin is not defined.

9. What is machine code?

   • A high-level programming language consisting of instruction lists that humans can read and understand
   • A medium-level programming language consisting of the assembly code designed for the computer processor
   • A low-level programming language consisting of binary digits/bits that the computer reads and understands
   • A low-level programming language consisting of hexadecimal digits that make up high-level language instructions

   • Explanation & Hint: Machine code is best described as: A low-level programming language consisting of binary digits/bits that the computer reads and understands. Machine code is the set of instructions executed directly by a computer’s CPU. It is expressed in binary digits (bits) and represents the fundamental level at which hardware operates. Each instruction is a binary number that directly affects the state of the computer, such as telling it to perform operations like moving data, executing arithmetic, or managing memory. This makes it the most basic and lowest level of code executable by the computer’s hardware.

10. Select the true statements. (Select two answers)

    • Python is a good choice for creating and executing tests for applications
    • Python 3 is backwards compatible with Python 2
    • Python is a good choice for low-level programming e.g., when you want to implement an effective driver
    • Python is free, open-source, and multiplatform

    • Explanation & Hint: The two true statements among the options provided are: Python is a good choice for creating and executing tests for applications. Python is widely used for testing due to its readability, simplicity, and the powerful frameworks available such as pytest, unittest, and Selenium for web testing. These features make it an excellent choice for writing both simple and complex test scripts. Python is free, open-source, and multiplatform. Python is indeed an open-source programming language that is freely available and can be used on multiple platforms including Windows, macOS, and Linux. This makes it accessible to a wide range of users and allows for the development of applications that can operate across different operating systems. Regarding the other options: Python 3 is backwards compatible with Python 2: This statement is false. Python 3 introduced several changes that are not compatible with Python 2, which led to the need for code modifications when migrating from Python 2 to Python 3. Python is a good choice for low-level programming, e.g., when you want to implement an effective driver: This is generally false. Python is primarily used as a high-level programming language and isn’t suited for low-level programming tasks such as driver development, which are better handled by languages like C or C++ that offer closer hardware interaction.