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GATE CS 2022: Compiler Design-2
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Question 1
Which of the following is the machine dependent phase of compiler?
Question 2
Which of the following code can produce lexical error?
Question 3
Consider the below statements :
S1 : The front end of compiler consists Lexical analyzer , Syntax analyzer and semantic analyzer.
S2 : Target code generator is known as the back-end of compiler.
S3 : Code optimizer is middle end of compiler and is a optional phase in compiler.
Which option is correct ?
S1 : The front end of compiler consists Lexical analyzer , Syntax analyzer and semantic analyzer.
S2 : Target code generator is known as the back-end of compiler.
S3 : Code optimizer is middle end of compiler and is a optional phase in compiler.
Which option is correct ?
Question 4
Consider the following grammar for arithmetic expressions
X → X+Z|Z
Z → Z*Y|Y
Y → (X)id
Then after eliminating the immediate left recursions we get
Question 5
If A->ɑ|ε is LL (1) and ɑ ≠ ε then which of the following is TRUE?
Question 6
Consider the following SSA code:
t1 = a – b;
t2 = t1 * c;
t3 = a – b;
t4 = t3 / t1
How many minimum variables required in equivalent three address code for the above static single assignment code?
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Jul 21GATE & PSU CS