stages of cmpilation

Question 1

during lexical analysis … (2)

Answer 1

• comments and white spaces are removed
• remaining code is turned into a series of tokens

Question 2

during syntax analysis ..(3)

Answer 2

• errors are generated (if any tokens break the rules of the program)
• abstract syntax tree is built from tokens produced
• symbol table is created to keep track of variables and subroutines

Question 3

during code generation … (1)

Answer 3

• abstract code tree is converted into object code

Question 4

during the optimization stage…(2)

Answer 4

• tweaks the code so it will use as little memory as possible
• tweaks the code so it will run as quickly as possible

Question 5

what are the advantages of using high level languages(3)

Answer 5

• easier to learn/ understand code
• programs are prone to less errors/bugs
• easier to find programmers who specialise in high level languages

Question 6

what are the advantages of using low level languages(3)

Answer 6

• code is optimised to specific architecture (embedded systems)
• code can execute extremely fast
• assembled code occupies less memory in space compared to machine code produced by high level compiler