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1. Which of the following sentences cannot be derived using the following grammar: (Hint: look at the terminal symbols) --> {( + | - )
1. Which of the following sentences cannot be derived using the following grammar: (Hint: look at the terminal symbols)
a + b * c | ||
a + ( b + c ) | ||
a * b * c | ||
( a - b ) * c |
2. What is the weakest precondition for the following assignment statement: x = y * 2 + 10 { x > 20}
x = 5 | ||
x > 5 | ||
y > 5 | ||
y = 5 |
3. Which of the following are terminal symbols in the grammar rule:
( | ||
+ | ||
| | ||
|
4. Which of the following are nonterminal symbols in the grammar:
if | ||
( | ||
else | ||
|
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