PCEP-30-02 1.1 Understand Fundamental Terms and Definitions PCEP-30 Practice Questions (Page 5)

Questions 21–25

1. 21application · medium

   A student writes `x = 5` and then `print(x)`. The output is `5`. Later they write `x = '5'` and `print(x)`. The output is `5` as well. What does this demonstrate about the semantics of Python variables?

   • AThe output is the same because both values are the same token.
   • BThe variable `x` is permanently an integer, so the second assignment is ignored.
   • CThe `print` function converts everything to a string, so the type of `x` does not matter.
   • DThe variable `x` can hold different types of values at different times, and the meaning of `print(x)` depends on the current value.
   Reveal Solution Discussion Select an answer first
2. 22application · medium

   A junior developer claims that Python is a compiled language because the interpreter produces .pyc files. You need to correct this misunderstanding. Which statement best clarifies the role of compilation in Python?

   • APython is an interpreted language, so compilation never happens; .pyc files are created by the operating system for caching.
   • BPython is purely interpreted; .pyc files are just cached source files and have no role in execution.
   • CPython source is compiled to bytecode, which is then executed by the Python virtual machine, so Python is both compiled and interpreted.
   • DPython is a compiled language because the compiler translates source directly to machine code before execution.
   Reveal Solution Discussion Select an answer first
4. 23foundation · easy

   Which statement correctly describes a key difference between an interpreter and a compiler?

   • AAn interpreter executes source code line by line, while a compiler translates the entire source program into machine code before execution.
   • BAn interpreter produces an executable file, while a compiler runs the source code directly without any translation.
   • CAn interpreter and a compiler both translate the entire program before any execution, differing only in the target language.
   • DAn interpreter translates the entire source program into machine code in one pass, while a compiler translates and executes it line by line.
   Reveal Solution Discussion Select an answer first
5. 24foundation · easy

   What is the primary purpose of compiling Python source code to bytecode?

   • ATo make the source code run faster by converting it directly to machine code.
   • BTo create a standalone executable that can run without Python installed.
   • CTo hide the source code from users for security purposes.
   • DTo simplify and speed up the interpretation process by using a lower-level representation.
   Reveal Solution Discussion Select an answer first
6. 25expert · medium

   A developer writes the following code: ```python x = 10 y = 20 if x > y: print('x is greater') else: print('y is greater') ``` The output is 'y is greater'. What does this output represent?

   • AThe lexis of the code: the tokens used in the condition.
   • BThe compilation result: the bytecode generated for the if-else statement.
   • CThe syntax of the code: the structure of the if-else statement.
   • DThe semantics of the code: the meaning and effect of the conditional statement.
   Reveal Solution Discussion Select an answer first