PCEP Question and answers correctly solved PCEP - Certified Entry-Level Python Programmer Study Cards
Alphabet - correct answer a set of symbols used to build words of a certain language (e.g., the Latin alphabet for English, the Cyrillic alphabet for Russian, Kanji for Japanese, and so on)
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PCEP - Certified Entry-Level Python
Programmer Study Cards
Alphabet - correct answer ✔a set of symbols used to build words of a certain
language (e.g., the Latin alphabet for English, the Cyrillic alphabet for
Russian, Kanji for Japanese, and so on)
Lexis - correct answer ✔(aka a dictionary) a set of words the language offers
its users (e.g., the word "computer" comes from the English language
dictionary, while "cmoptrue" doesn't; the word "chat" is present both in English
and French dictionaries, but their meanings are different)
Syntax - correct answer ✔a set of rules (formal or informal, written or felt
intuitively) used to determine if a certain string of words forms a valid
sentence (e.g., "I am a python" is a syntactically correct phrase, while "I a
python am" isn't)
Semantics - correct answer ✔a set of rules determining if a certain phrase
makes sense (e.g., "I ate a doughnut" makes sense, but "A doughnut ate me"
doesn't)
Source code - correct answer ✔A program written in a high-level
programming language (in contrast to the machine code executed by
computers)
What compositions must a computer program have to make sense? - correct
answer ✔A computer program must make sense:
,alphabetically - a program needs to be written in a recognizable script, such
as Roman, Cyrillic, etc.
lexically - each programming language has its dictionary and you need to
master it; thankfully, it's much simpler and smaller than the dictionary of any
natural language;
syntactically - each language has its rules and they must be obeyed;
semantically - the program has to make sense.
What are two different ways of transforming a program from a high-level
programming language into machine language? - correct answer
✔Compilation and Interpretation
What is compilation? - correct answer ✔The translation of source code into
machine code.
What is interpretation? - correct answer ✔you (or any user of the code) can
translate the source program each time it has to be run; the program
performing this kind of transformation is called an interpreter.
How is source code stored and what requirements must it meet? - correct
answer ✔Source code is stored in a computer file, typically a text file. The
text file must be a pure text file without any decorations like different fonts,
colors, embedded images or other media.
Advantages to compilation? - correct answer ✔- the execution of the
translated code is usually faster;
, - only the user has to have the compiler - the end-user may use the code
without it;
-the translated code is stored using machine language - as it is very hard to
understand it, your own inventions and programming tricks are likely to remain
your secret.
Advantages to interpretation? - correct answer ✔- you can run the code as
soon as you complete it - there are no additional phases of translation;
- the code is stored using programming language, not machine language - this
means that it can be run on computers using different machine languages;
you don't compile your code separately for each different architecture.
Disadvantages to compilation? - correct answer ✔- the compilation itself may
be a very time-consuming process - you may not be able to run your code
immediately after making an amendment;
- you have to have as many compilers as hardware platforms you want your
code to be run on.
Disadvantages to interpretation? - correct answer ✔-don't expect
interpretation to ramp up your code to high speed - your code will share the
computer's power with the interpreter, so it can't be really fast;
-both you and the end user have to have the interpreter to run your code.
What are scripting languages? - correct answer ✔languages designed to be
utilized in the interpretation manner.
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