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Question:
Published on: 21 January, 2025

Draw the syntax tree and DAG from the following expression.

if x>0 then x=3*(y+1) else y=y+1

Answer:

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Consider the grammar:

S → aSbS | bSaS | 𝜖

  • Show that this grammar is ambiguous by constructing two different left most derivations for the sentence abab.
  • Construct the corresponding right most derivations for abab.
  • Construct the corresponding parse tree for abab.
  • What language does this grammar generate?
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21 January, 2025

For the input expression (4*7+1)*2, construct an annotated parse tree.
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Write short notes on: 

  • Peephole Optimization
  • Symbol Table
  • Cross Compiler
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21 January, 2025

Draw the syntax tree and DAG from the following expression.

if x>0 then x=3*(y+1) else y=y+1
View : 1312
21 January, 2025

Compare quadruples, triples and indirect triples.

x= (a + b) * - c / d

Represent this expression in quadruples, triples and indirect triples forms. Generate the machine code for the following instruction:

V=a+(b*c)-d.
View : 2192
21 January, 2025
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