Match all items in Group 1 with correct options from those given in Group 2.

Group 1

P. Regular expression
Q. Pushdown automata
R. Dataflow analysis
S. Register allocation

Group 2

1. Syntax analysis
2. Code generation
3. Lexical analysis
4. Code optimization

The number of tokens in the following C statement is:

printf("i = %d, &i = %x",i, &i);

Type checking is normally done during

Which of the following strings can definitely be said to be tokens without looking at the next input character while compiling a Pascal program?

I. begin
II. program
III. <>