[Pak Youth] CS402 today paper

My today CS402 paper 2013
1. Write CFG for (a+b)* and remove null production.Marks 3
2. Even-Even Language {a,b}  may partition E*, Explain briefly Marks 5
3. Write CNF for A-->BAB | B | ^        Marks 5
                         B--> 00 | ^

4. convert NFA into FA using transition table. Marks 5
                  a              b     
    a,b <O----------->O--------->O> a,b
            x1            x2          x3

                       n     n+1
5. Draw PDA  a      b                      Marks 5

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