C Programming Questions and Answers – While Loops – 2

«
»

This set of C Multiple Choice Questions & Answers (MCQs) focuses on “While Loops – 2”.

Pre-requisite for this C MCQ set: Advanced C Programming Video Tutorial.

advertisement

1. What will be the output of the following C code?

  1.     #include <stdio.h>
  2.     void main()
  3.     {
  4.         char *str = "";
  5.         do
  6.         {
  7.             printf("hello");
  8.         } while (str);
  9.     }

a) Nothing
b) Run time error
c) Varies
d) Hello is printed infinite times
View Answer

Answer: d
Explanation: None.
advertisement
advertisement

2. What will be the output of the following C code?

advertisement
  1. #include <stdio.h>
  2. void main()
  3. {
  4.     int i = 0;
  5.     while (i < 10)
  6.     {
  7.         i++;
  8.         printf("hi\n");
  9.         while (i < 8) 
  10.         {
  11.             i++;
  12.             printf("hello\n");
  13.         }
  14.     }
  15. }

a) Hi is printed 8 times, hello 7 times and then hi 2 times
b) Hi is printed 10 times, hello 7 times
c) Hi is printed once, hello 7 times
d) Hi is printed once, hello 7 times and then hi 2 times
View Answer

Answer: d
Explanation: None.
advertisement

3. What is an example of iteration in C?
a) for
b) while
c) do-while
d) all of the mentioned
View Answer

Answer: d
Explanation: None.

4. How many times while loop condition is tested in the following C code snippets, if i is initialized to 0 in both the cases?

advertisement
  1. while (i < n)
  2.          i++;
  3.     ————-
  4.     do
  5.          i++;
  6.     while (i <= n);

a) n, n
b) n, n+1
c) n+1, n
d) n+1, n+1
View Answer

Answer: d
Explanation: None.

5. What will be the output of the following C code?

  1.     #include <stdio.h>
  2.     int main()
  3.     {
  4.         int i = 0;
  5.         while (i = 0)
  6.             printf("True\n");
  7.         printf("False\n");
  8.     }

a) True (infinite time)
b) True (1 time) False
c) False
d) Compiler dependent
View Answer

Answer: c
Explanation: None.

6. What will be the output of the following C code?

  1.     #include <stdio.h>
  2.     int main()
  3.     {
  4.         int i = 0, j = 0;
  5.         while (i < 5, j < 10)
  6.         {
  7.             i++;
  8.             j++;
  9.         }
  10.         printf("%d, %d\n", i, j);
  11.     }

a) 5, 5
b) 5, 10
c) 10, 10
d) Syntax error
View Answer

Answer: c
Explanation: None.

7. Which loop is most suitable to first perform the operation and then test the condition?
a) for loop
b) while loop
c) do-while loop
d) none of the mentioned
View Answer

Answer: c
Explanation: None.

Sanfoundry Global Education & Learning Series – C Programming Language.

Participate in the Sanfoundry Certification contest to get free Certificate of Merit. Join our social networks below and stay updated with latest contests, videos, internships and jobs!

advertisement
advertisement

Leave a Comment

Manish Bhojasia - Founder & CTO at Sanfoundry
Manish Bhojasia, a technology veteran with 20+ years @ Cisco & Wipro, is Founder and CTO at Sanfoundry. He is Linux Kernel Developer & SAN Architect and is passionate about competency developments in these areas. He lives in Bangalore and delivers focused training sessions to IT professionals in Linux Kernel, Linux Debugging, Linux Device Drivers, Linux Networking, Linux Storage, Advanced C Programming, SAN Storage Technologies, SCSI Internals & Storage Protocols such as iSCSI & Fiber Channel. Stay connected with him @ LinkedIn | Youtube | Instagram | Facebook | Twitter

Check his free tutorial videos on Advanced C Programming. Join his Sanfoundry-Classes telegram channel for all videos and queries on Programming, Data-Structures, Kernel, Personality development and Mentoring.