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1(a)
Define lexeme, token and pattern. Identify the lexemes that make up the tokens in
the following program segment. Indicate corresponding token and pattern.
void swap (int a, int b)
{
int k;
k=a;
a=b
b=k;
}
void swap (int a, int b)
{
int k;
k=a;
a=b
b=k;
}
7 M
1(b)
Explain Semantic Analysis and Syntax Analysis phases of compiler with suitable example. Also explain the reporting errors by these two phases.
7 M
2(a)
Write a short note on Symbol Table Management.
7 M
Solve any one question from Q.2(b) & Q.2(c)
2(b)
Construct DFA for following Regular expression. Use firstpos, lastpos and followpos functions to construct DFA.
( a* | b *) *
( a* | b *) *
7 M
2(c)
Construct NFA for following Regular Expression using Thomson's Construction.
Apply subset construction method to convert into DFA.
(a | b) *abb
(a | b) *abb
7 M
Solve any one question from Q.3 & Q.4
3(a)
Construct LL(1) parsing table for the following Grammar:
S → (L) | a
L → L.S | S
S → (L) | a
L → L.S | S
7 M
3(b)
Check whether the following grammar is CLR or not.
S → Aa | bAc | Bc | bBa
A → d
B &rarr d
S → Aa | bAc | Bc | bBa
A → d
B &rarr d
7 M
4(a)
Define: Left Recursive. State the rule to remove left recursive from the grammar. Eliminate left recursive from following grammar.
S → Aa | b
A → Ac | Sd | f
S → Aa | b
A → Ac | Sd | f
7 M
4(b)
Construct SLR Parsing Table for the following grammar.
S → 0S0 | 1S1 | 10
S → 0S0 | 1S1 | 10
7 M
Solve any one question from Q.5 & Q.6
5(a)
Explain Operator Precedence Parsing method with example.
7 M
5(b)
Show syntax directed definition for simple desk calculator. Also show annotated parse tree for 3*5+4n, where n indicates newline.
7 M
6(a)
Explain LALR parser in detail. Support your answer with example.
7 M
6(b)
Give the translation scheme that converts infix to postfix expression for the following grammar and also generate the annotated parse tree for input string 7+3+2.
E → E+T
E → T
T → 0 | 1 | 3 | 4 | 5 | 6 | 7 | 8 | 9
E → E+T
E → T
T → 0 | 1 | 3 | 4 | 5 | 6 | 7 | 8 | 9
7 M
Solve any one question from Q.7 & Q.8
7(a)
Translate following arithmetic expression
- (a*b)+(c+d)-(a+b+c+d) into
1] Quadruples
2] Triple
3] Indirect Triple
- (a*b)+(c+d)-(a+b+c+d) into
1] Quadruples
2] Triple
3] Indirect Triple
7 M
7(b)
Explain various dynamic storage allocation techniques.
7 M
8(a)
Explain any three code optimization techniques with example.
7 M
8(b)
Explain various issues in design of code generator.
7 M
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