C Programming Questions and Answers – For Loops – 2

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

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

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

  1.     #include <stdio.h>
  2.     void main()
  3.     {
  4.         double k = 0;
  5.         for (k = 0.0; k < 3.0; k++);
  6.             printf("%lf", k);
  7.     }

a) 2.000000
b) 4.000000
c) 3.000000
d) Run time error
View Answer

Answer: c
Explanation: None.

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

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  1.     #include <stdio.h>
  2.     void main()
  3.     {
  4.         int k;
  5.         for (k = -3; k < -5; k++)
  6.             printf("Hello");
  7.     }

a) Hello
b) Infinite hello
c) Run time error
d) Nothing
View Answer

Answer: d
Explanation: None.
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3. What will be the output of the following C code?

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

a) Compile time error
b) Infinite loop
c) After loop
d) Undefined behaviour
View Answer

Answer: a
Explanation: None.
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4. What will be the output of the following C code?

  1.     #include <stdio.h>
  2.     int main()
  3.     {
  4.         int i = 0;
  5.         for (i++; i == 1; i = 2)
  6.             printf("In for loop ");
  7.             printf("After loop\n");
  8.     }

a) In for loop after loop
b) After loop
c) Compile time error
d) Undefined behaviour
View Answer

Answer: a
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.         for (foo(); i == 1; i = 2)
  6.             printf("In for loop\n");
  7.             printf("After loop\n");
  8.     }
  9.     int foo()
  10.     {
  11.         return 1;
  12.     }

a) After loop
b) In for loop after loop
c) Compile time error
d) Infinite loop
View Answer

Answer: a
Explanation: None.

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

  1.     #include <stdio.h>
  2.     int main()
  3.     {
  4.         int *p = NULL;
  5.         for (foo(); p; p = 0)
  6.             printf("In for loop\n");
  7.             printf("After loop\n");
  8.     }

a) In for loop after loop
b) Compile time error
c) Infinite loop
d) Depends on the value of NULL
View Answer

Answer: b
Explanation: None.

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

  1.     #include <stdio.h>
  2.     int main()
  3.     {
  4.         for (int i = 0;i < 1; i++)
  5.             printf("In for loop\n");
  6.     }

a) Compile time error
b) In for loop
c) Depends on the standard compiler implements
d) Depends on the compiler
View Answer

Answer: c
Explanation: None.

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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

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