ConpSci - Program Construction

Question 1

Compilation Process - Lexical Analysis

Answer 1

Comments and whitespace are removed
Keywords, variables and constants are replaced by tokens
A symbol table containing the addresses of variables, labels and subroutines

Question 2

Compilation Process - Syntax Analysis

Answer 2

Tokens are checked against syntax rules of the language, if syntax errors are found, error messages are produced

Question 3

Compilation Process - Semantic Analysis

Answer 3

Variables are checked to ensure they are correctly declared, used and data type
Operations are checked to ensure they are valid (quotient not stored as integer)

Question 4

Compilation

Answer 4

Compilation only needs to occur once
Can be used by any device without any extra software
Hardware dependent
Faster
Intellectual property protected

Question 5

Interpretation

Answer 5

Debugging is easier
Must be interpreted on every execution
Not hardware dependent
An interpreter is needed to run
Slower

Question 6

Assembly

Answer 6

One-to-one translation from assembly (low level code) to machine code.

Using assembly provides more control over memory and storage
Less processing required to run
Difficult to learn and complex programs