C MCQs: Formatted Output – Part 1

Welcome to MCQ QUIZ for preperation for C programming tests for various interviews:

Here is a listing of advanced C interview questions on Formatted Output along with answers, explanations and/or solutions:

1. What is the output of this C code?

#include
 int main()
 {
 int i = 10, j = 2;
 printf("%d\n", printf("%d %d ", i, j));
 }

a) Compile time error
b) 10 2 4
c) 10 2 2
d) 10 2 5

2. What is the output of this C code?

#include
 int main()
 {
 int i = 10, j = 3;
 printf("%d %d %d", i, j);
 }

a) Compile time error
b) 10 3
c) 10 3 some garbage value
d) Undefined behaviour


3. What is the output of this C code?

#include
 int main()
 {
 int i = 10, j = 3, k = 3;
 printf("%d %d ", i, j, k);
 }

a) Compile time error
b) 10 3 3
c) 10 3
d) 10 3 somegarbage value


4. What is the output of this C code?

#include
 int main()
 {
 char *s = "myworld";
 int i = 9;
 printf("%*s", i, s);
 }

a) myworld
b) myworld(note: spaces to the left of myworld)
c) myworld (note:followed by two spaces after myworld)
d) Undefined

5. What is the output of this C code?

#include
 int main(int argc, char** argv)
 {
 char *s = "myworld";
 int i = 3;
 printf("%10.*s", i, s);
 }

a) myw
b) myworld(note:2 spaces before myworld)
c) myworld (note:2 spaces after myworld)
d) myw(note:6 spaces after myworld)

6. What is the difference between %e and %g?
a) %e output formatting depends on the argument and %g always formats in the format [-]m.dddddd or [-]m.dddddE[+|-]xx where no.of ds are optional.
b) %e always formats in the format [-]m.dddddd or [-]m.dddddE[+|-]xx where no.of ds are optional and output formatting depends on the argument.
c) No differences
d) Depends on the standard

7. Escape sequences are prefixed with.
a) %
b) /
c) ”
d) None of the mentioned

8. What is the purpose of sprintf?
a) It prints the data into stdout
b) It writes the formatted data into a string
c) It writes the formatted data into a file
d) Both a and c

9. The syntax to print a % using printf statement can be done by.
a) %
b) “%”
c) ‘%’
d) %%

 Next –> C MCQs: Formatted Output- Part 2

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