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Problem Solving Through Programming In C NPTEL Assignment Answers Week 5
Q1. What will be the output?
#include <stdio.h>
int main()
{
int n;
for(n=10; n<10; n--)
printf("%d", n);
return 0;
}a. 10 9 8 7 6 5 4 3 2 1
b. 1 2 3 4 5 6 7 8 9 10
c. No output
d. None of the above statements are correct
Answer: c. No output
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Q2. Which of the following is not an infinite loop?
a. for(;;)
b. for(x=0; x<=10)
c. while(1)
d. while(0)
Answer: d. while(0)
Q3. Consider the following and identify the false statement(s)?
i. ‘do-while loop must be terminated by a semi colon.
ii. ‘do-while’ loop is always an infinite loop.
iii. Even if the condition is false, the ‘do-while’ loop executes once.
iv. ‘do-while’ loop is an entry-controlled loop.
a. (i) and (ii)
b. (i), (ii), and (iv)
c. (ii)
d. (ii) and (iv)
Answer: d. (ii) and (iv)
Q4. Compute the printed value of ‘m’ and ‘n’ of the C program given below
#include <stdio.h>
int main()
{
int m= 0, n = 0;
while (m<5, n<7)
{
m++;
n++;
}
printf("%d, %d\n", m, n);
return 0;
}a. 5, 7
b. 5, 5
c. 7, 7
d. 0, 0
Answer: c. 7, 7
Q5. What should be in the place of ********** so that except i=8, rest of the values of i (as defined in the ‘for’ loop: i=0 to i=19) will be printed?
#include <stdio.h>
int main(
{
int i = 0;
for (i=0; i<20; i++)
{
if(i==8)
{
**********
}
printf("i=%d\n",i);
}
return 0;
}a. break
b. continue
c. switch
d. exit
Answer: b. continue
Q6. What will be the output?
#include <stdio.h>
int main()
{
int x = 0;
switch(x)
{
case 0: printf("NPTEL");
case 1: printf("SWAWAM");
default: printf("IIT/IISc");
}
return 0;
}a. NPTEL
b. IIT/IISc
c. NPTELSWAWAMIIT/IISc
d. Compilation error
Answer: c. NPTELSWAWAMIIT/IISc
Q7. What will be the output?
#include<stdio.h>
int main()
{
int k, j;
for(k=1,j=3; k<=3,j>=1;k++,j--)
{
printf("%d,%d\n",k,j);
}
return 0;
}a. 1,3
b. 1,3
3,1
c. 1,3
2,2
3,1
d. 0,0
Answer: Option C
Q8. What will be the output of the program?
#include <stdio.h>
int main()
{
int p;
for (p=0; p<3; p++)
{
int p=4;
printf("%d,",p);
}
return 0;
}a. 4 will print 1 times
b. 4 will print 3 times
c. 4 will print 4 times
d. No output
Answer: b. 4 will print 3 times
Q9. For the C program given below, if the input given by the user is 7. What will be shown on the output window?
#include <stdio.h>
int main()
{
int n,i=2;
scanf("%d",&n);
do
{
if(n%i==0)
{
printf("The number is odd");
}
i++;
}while(i<n);
printf("The number is prime");
return 0;
}a. The number is odd
b. The number is prime
c. The number is odd The number is prime
d. Syntax Error
Answer: b. The number is prime
Q10. What will be the output?
#include <stdio.h>
int main()
{
int i = 0;
for(;;)
{
if(i==10)
continue;
printf("%d ", ++i);
}
return 0;
}a. 0 1 2 3 4 5 6 7 8 9 11 12…..infinite times
b. 1 2 3 4 5 6 7 8 9 11 12….infinite times
c. Won’t print anything
d. Error
Answer: c. Won’t print anything
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