A small manufacturing business uses networked computers with closed source application software installed.
A spreadsheet application package is used to calculate employee’s wages.
Give one benefit of using a spreadsheet application for this task compared to calculating wages manually.
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A programmer creates this function shown in Fig. 5 using a high-level language.
function mystery(x,y)
total = x + y
while x >= 10 then
x = x – 10
y = y – 10
total = total + x + y
endwhile
return total
endfunctionBefore the code in Fig. 5 can be executed, a translator must be used.
State the purpose of a translator.
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When Imogen creates programs in a high-level language, she makes use of libraries.
Explain what is meant by a library, giving one example of when one may be used.
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Operating systems usually come with utility software pre-installed.
Give two examples of utility software, explaining the purpose of both.
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Imogen installs a compiler for a high-level programming language onto her computer and makes use of an open source IDE (Integrated Development Environment).
State what is meant by the term ‘open source software’.
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Imogen installs a compiler for a high-level programming language onto her computer and makes use of an open source IDE (Integrated Development Environment).
Give one benefit to Imogen of using an open source IDE rather than a closed source IDE.
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For each statement shown in Table 5, tick (✓) one box in each row to indicate which stage of compilation each action takes place at.
Lexical analysis | Syntax analysis | Code generation | |
|---|---|---|---|
Comments and whitespace are removed | |||
Keywords are replaced with tokens | |||
Object code is created | |||
Symbol table created for variables | |||
Builds an abstract syntax tree |
Table 5
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Explain two differences between a compiler and an interpreter.
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When Imogen creates programs in a high-level language, she makes use of libraries.
Describe one advantage of the use of library files to programmers.
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Describe one disadvantage of the use of library files to programmers.
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Explain how linkers are used during the compilation process.
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A small manufacturing business uses networked computers with closed source application software installed.
A spreadsheet application package is used to calculate employee’s wages.
Give two other types of application packages that the small business could use, giving an example of a task that the business could use each application for.
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Describe a drawback of using closed source software (rather than open source software) for the small business.
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Describe the purpose of code optimisation
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