MUST KNOW Flashcards
(13 cards)
1
Q
A.0
A
0
2
Q
A.1
A
A
3
Q
A.A
A
A
4
Q
A.(not A)
A
0
5
Q
A+0
A
A
6
Q
A+1
A
1
7
Q
A+A
A
A
8
Q
A+(not A)
A
1
9
Q
5 stages of compilation
A
- Lexical analysis
- Syntax analysis
- Semantic analysis
- Code generation
5 code optimisation
10
Q
What happens in lexical analysis
A
Comments and spaces are removed
Constants keywords and identifiers are replaced by tokens
A symbol table is created containing the addresses of all variables labels and subroutines
11
Q
What happens in syntax analysis
A
Tokens are checked against the assemblers rules of syntax
Parsing happens
12
Q
What is parsing
A
Systematically breaking down tokens into their component parts to see if they use the correct syntax
13
Q
What happens in semantic analysis
A
Variables are checked to ensure they are off the correct data type and they have been properly declared and used
Operations are checked h to ensure they are legal for the data type used
