What is the value of X printed by the following program ? program COMPUTE ( input, output ); varX : integer ; procedure FIND ( X: real ) ; begin X : = sqrt ( X ) ; end ; begin X : = 2 FIND ( X ) writeln ( X ) end

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Computer Science Set-1
Compiler Design
60

Compiler Design MCQ with Answers

60) What is the value of X printed by the following program ?
program COMPUTE ( input, output );
varX : integer ;
procedure FIND ( X: real ) ;
begin
X : = sqrt ( X ) ;
end ;
begin
X : = 2
FIND ( X )
writeln ( X )
end

√2

Run-time error

none of these

Answer is:

2

Compiler Design MCQ with Answers

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61) Which of the following macros can put a macro assembler into an infinite loop ?

MACRO M1, X
IF EQ, X if X = 0 then....
M1 X + 1
ENDC
IF NE, X : IF X ≠ 0 then......
WORD X : address (X) is stored here
ENDC
ENDM

MACRO M2, X
IF EQ, X
M2 X
ENDC
IF NE, X
WORD X + 1
ENDC
ENDM

both (a) and (b)

none of these

Answer is:

MACRO M2, X
IF EQ, X
M2 X
ENDC
IF NE, X
WORD X + 1
ENDC
ENDM

62) Given the following Pascal-like program segment
Procedure A,
x, y : integer ;
Procedure B;
x, z : real ;
S1
end B;
Procedure C;
i : integer ;
S2
end C
end A;
The variables accessible in S1 and S2 are

x of A, y, x of B and z in S1 and x of B, y and i in S2

x of B, y and z in S1 and x of B, i and z in S2

x of B, z and y in S1 and x of A, i and y in S2

none of these

Answer is:

x of B, z and y in S1 and x of A, i and y in S2

63) An intermediate code form is

postfix notation

syntax trees

three address codes

all of these

Answer is:

all of these

Explanation:

An intermediate code form is
* postfix notation
* syntax trees
* three address codes

64) Three address code involves

exactly 3 address

at the most 3 address

no unary operators

none of these

Answer is:

at the most 3 address

Compiler Design MCQ with Answers

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60) What is the value of X printed by the following program ? program COMPUTE ( input, output ); varX : integer ; procedure FIND ( X: real ) ; begin X : = sqrt ( X ) ; end ; begin X : = 2 FIND ( X ) writeln ( X ) end

2

Compiler Design MCQ with Answers

Related Compiler Design MCQ with Answers

61) Which of the following macros can put a macro assembler into an infinite loop ?

MACRO M2, X IF EQ, X M2 X ENDC IF NE, X WORD X + 1 ENDC ENDM

62) Given the following Pascal-like program segment Procedure A, x, y : integer ; Procedure B; x, z : real ; S1 end B; Procedure C; i : integer ; S2 end C end A; The variables accessible in S1 and S2 are

x of B, z and y in S1 and x of A, i and y in S2

63) An intermediate code form is

all of these

64) Three address code involves

at the most 3 address

Compiler Design MCQ with Answers

60) What is the value of X printed by the following program ?
program COMPUTE ( input, output );
varX : integer ;
procedure FIND ( X: real ) ;
begin
X : = sqrt ( X ) ;
end ;
begin
X : = 2
FIND ( X )
writeln ( X )
end

MACRO M2, X
IF EQ, X
M2 X
ENDC
IF NE, X
WORD X + 1
ENDC
ENDM

62) Given the following Pascal-like program segment
Procedure A,
x, y : integer ;
Procedure B;
x, z : real ;
S1
end B;
Procedure C;
i : integer ;
S2
end C
end A;
The variables accessible in S1 and S2 are