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Computer Science Set-1
Compiler Design
69

Compiler Design MCQ with Answers

69) Running time of a program depends on

the way the registers and addressing modes are used

the order in which computations are performed

the usage of machine idioms

all of these

Answer is:

all of these

Explanation:

Running time of a program depends on
* the way the registers and addressing modes are used
* the order in which computations are performed
* the usage of machine idioms

Compiler Design MCQ with Answers

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70) If control signals {a,b,c,d,e,f,g} for some micro instructions and their corresponding MCCS (Maximum Compatibility Classes) are [ad f* g, abd, beg, b deg} , then to determine minimal MCC cover, we need to remove

adfg

afd

bcg

bdeg

Answer is:

afd

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

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.

Compiler Design MCQ with Answers

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69) Running time of a program depends on

all of these

Compiler Design MCQ with Answers

Related Compiler Design MCQ with Answers

70) If control signals {a,b,c,d,e,f,g} for some micro instructions and their corresponding MCCS (Maximum Compatibility Classes) are [ad f* g, abd, beg, b deg} , then to determine minimal MCC cover, we need to remove

afd

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

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.

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);