Assume that X and Y are non zero positive integers. What does the following Pascal program segment do? while X < > Y do if X > Y then X : = X - Y else Y : = Y - X ; write (X);

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Computer Science Set-1
Compiler Design
71

Compiler Design MCQ with Answers

71) Assume that X and Y are non zero positive integers. What does the following Pascal program segment do?
while X < > Y do
if X > Y then
X : = X - Y
else
Y : = Y - X ;
write (X);

Computes LCM of two numbers

Divides larger number by the smaller number

Computes GCD of two numbers

None of these

Answer is:

Computes GCD of two numbers

Compiler Design MCQ with Answers

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72) A variant record in Pascal is defined by
type varirec = record
number : integer
case(varl, var2)of
var 1 : (x, y : integer);
var2 : (p.q. : real);
end;
end ;
Let an array of 100 records was declared on a machine which uses 4 bytes for an integer and 8 bytes for a real. How much space would the compiler have to reserve for the array ?

2800

2400

2000

1200

Answer is:

2000

73) In a single pass assembler, most of the forward references can be avoided by putting the restriction

on the number of strings/life reacts

that the data segment must be defined after the code segment.

on unconditional rump.

None of these

Answer is:

that the data segment must be defined after the code segment.

74) The method which merges the bodies of two loops is

loop rolling

loop Jamming

constant folding

none of these

Answer is:

loop Jamming

75) Assembly code data base is associated with

assembly language version of the program which is created by the code.

a permanent table of decision rules in the form of patterns for matching with the uniform symbol table to discover syntactic structure.

Both (a) and (b)

a permanent table which lists all key words and special symbols of the language in symbolic form.

Answer is:

assembly language version of the program which is created by the code.

Compiler Design MCQ with Answers

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71) Assume that X and Y are non zero positive integers. What does the following Pascal program segment do? while X < > Y do if X > Y then X : = X - Y else Y : = Y - X ; write (X);

Computes GCD of two numbers

Compiler Design MCQ with Answers

Related Compiler Design MCQ with Answers

2000

73) In a single pass assembler, most of the forward references can be avoided by putting the restriction

that the data segment must be defined after the code segment.

74) The method which merges the bodies of two loops is

loop Jamming

75) Assembly code data base is associated with

assembly language version of the program which is created by the code.

Compiler Design MCQ with Answers

71) Assume that X and Y are non zero positive integers. What does the following Pascal program segment do?
while X < > Y do
if X > Y then
X : = X - Y
else
Y : = Y - X ;
write (X);