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# Functions Questions

Home > Technical Aptitude > C Programming > Functions > General Questions
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What are the values printed by the following program?#define dprint(expr) printf(#expr =%d\n,expr)main(){int x=7;int y=3;dprintf(x/y);}

Aexpr=2

B#2 = 2

Cx/y=2

DCompile Error

Answer: Option C

Explanation:

Here is no explanation for this answer

Workspace

NA
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25
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Predict the output or error(s) for the following:

int zap (int n)
{
if (n<=1) then
zap=1;
else
zap=zap(n-3)+zap(n-1);
}
then the call zap(6) gives the values of zap

A8

B9

C6

D12

Answer: Option B

Explanation:

Here is no explanation for this answer

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What would be the Output?

int fun(unsigned int number)
{
if(number <= 1)
return 1;
return number * fun(number - 1 );
}

void main()
{
printf("%d",fun(5));
}

A120

B5

C10

DError

Answer: Option A

Explanation:

(C) Factorial by recursion

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53
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A recursive function would result in infinite recursion, of the following were left out:

ABase call

BRecursive call

CSubtraction

DLocal variable declarations

Answer: Option A

Explanation:

Here is no explanation for this answer

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void fn(int *p)
{
static int val = 100;
p = &val;
}
main()
{
int i=10;
printf("i=%d\n", i);
fn(&i);
printf("i=%d\n", i);
}
What is the o/p of the above code?

Ai=100 i=10

Bi=10 i=10

Ci=100 i=100

Answer: Option B

Explanation:

Here is no explanation for this answer

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What is the output of the following problem ?
#include<stdio.h>
int main()
{
int j,ans;
j = 4;
ans = count(4);
printf("%d\n",ans);
return 0;
}
int count(int  i)
{
if ( i < 0)
return(i);
else
return( count(i-2) + count(i-1));
}

A-18

B18

C8

DCompilation Error

ENo output

Answer: Option A

Explanation:

Here is no explanation for this answer

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What is the output of the following problem ?
#include<stdio.h>
int main()
{
int j;
for(j=0;j<3;j++)
foo();
return 0;
}
foo() {
static int i = 10;
i+=10;
printf("%d",i);
}

A20 20 20

B20 30 40

C10 10 10

DNone of these

Answer: Option B

Explanation:

Here is no explanation for this answer

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What is the output of the following problem ?
#include<stdio.h>

int main() {
int factorial(int n);
int i,ans;
ans = factorial(5);
printf("\nFactorial by recursion  = %d\n", ans);
return 0;
}
int factorial(int n)
{
if (n <= 1)
return (1);
else
return ( n * factorial(n-1));
}

A120

B5

C1

DNoneof these

Answer: Option A

Explanation:

Here is no explanation for this answer

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What is the output of the following 'C' program?
#include<stdio.h>
aaa() {
printf("hi");
}
bbb() {
printf("hello");
}
ccc() {
printf("bye");
}
void main()
{
int (*ptr[3])();
ptr[0]=aaa;
ptr[1]=bbb;
ptr[2]=ccc;
ptr[2]();
}

Ahi

Bbye

Caaa

DCompilation Error

ENone of these

Answer: Option B

Explanation:

ptr is array of pointers to functions of return type int.ptr[0] is assigned to address of the function aaa. Similarly ptr[1] and ptr[2] for bbb and ccc respectively. ptr[2]() is in effect of writing ccc(), since ptr[2] points to ccc.

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What is the output of the following 'C' program?
#include<stdio.h>
void main(){
int i=3,val;
val=f(i)+ +f(i=1)+ +f(i-1);
printf("%d",val);
}
int f(int num){
return num*5;
}

A20

B30

C21

D31

ECompilation error

Answer: Option A

Explanation:

when f(i) executes first then i=5is there. therefore, f(5)return 15.

next i=1 then f(1) return 5

now f(1-1)=f(0) return 0

adding all : 15+5+0=20

Workspace

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