C Programming Questions and Answers on Switch Statements for Freshers

1. What is the output of this C code(when 1 is entered)?

1.     #include 

2.     void main()

3.     {

4.         double ch;

5.         printf("enter a value btw 1 to 2:");

6.         scanf("%lf", &ch);

7.         switch (ch)

8.         {

9.         case 1:

10.             printf("1");

11.             break;

12.         case 2:

13.             printf("2");

14.             break;

15.         }

16.     }

a) Compile time error
b) 1
c) 2
d) Varies

Answer: a

2. What is the output of this C code(When 1 is entered)?

1.     #include 

2.     void main()

3.     {

4.         char *ch;

5.         printf("enter a value btw 1 to 3:");

6.         scanf("%s", ch);

7.         switch (ch)

8.         {

9.         case "1":

10.             printf("1");

11.             break;

12.         case "2":

13.             printf("2");

14.             break;

15.         }

16.     }

a) 1
b) Compile time error
c) 2
d) Run time error

Answer: b

3. What is the output of this C code(When 1 is entered)?

1.     #include 

2.     void main()

3.     {

4.         int ch;

5.         printf("enter a value btw 1 to 2:");

6.         scanf("%d", &ch);

7.         switch (ch)

8.         {

9.         case 1:

10.             printf("1\n");

11.         default:

12.             printf("2\n");

13.         }

14.     }

a) 1
b) 2
c) 1 2
d) Run time error

Answer: c

4. What is the output of this C code(When 2 is entered)?

1.     #include 

2.     void main()

3.     {

4.         int ch;

5.         printf("enter a value btw 1 to 2:");

6.         scanf("%d", &ch);

7.         switch (ch)

8.         {

9.         case 1:

10.             printf("1\n");

11.             break;

12.             printf("hi");

13.         default:

14.             printf("2\n");

15.         }

16.     }

a) 1
b) hi 2
c) Run time error
d) 2

Answer: d

5. What is the output of this C code(When 1 is entered)?

1.     #include 

2.     void main()

3.     {

4.         int ch;

5.         printf("enter a value btw 1 to 2:");

6.         scanf("%d", &ch);

7.         switch (ch, ch + 1)

8.         {

9.         case 1:

10.             printf("1\n");

11.             break;

12.         case 2:

13.             printf("2");

14.             break;

15.         }

16.     }

a) 1
b) 2
c) 3
d) Run time error

Answer: b

6. What is the output of this C code?

1.     #include 

2.     int main()

3.     {

4.         int a = 1, b = 1;

5.         switch (a)

6.         {

7.         case a*b:

8.             printf("yes ");

9.         case a-b:

10.             printf("no\n");

11.             break;

12.         }

13.     }

a) yes
b) no
c) Compile time error
d) yes no

Answer: c

7. What is the output of this C code?

1.     #include 

2.     int main()

3.     {

4.         int x = 97;

5.         switch (x)

6.         {

7.         case 'a':

8.             printf("yes ");

9.             break;

10.         case 97:

11.             printf("no\n");

12.             break;

13.         }

14.     }

a) yes
b) yes no
c) Duplicate case value error
d) Character case value error

Answer: c

8. What is the output of this C code?

1.     #include 

2.     int main()

3.     {

4.         float f = 1;

5.         switch (f)

6.         {

7.         case 1.0:

8.             printf("yes\n");

9.             break;

10.         default:

11.             printf("default\n");

12.         }

13.     }

a) yes
b) yes default
c) Undefined behaviour
d) Compile time error

Answer: d

9. What is the output of this C code?

1.     #include 

2.     const int a = 1,  b = 2;

3.     int main()

4.     {

5.         int x = 1;

6.         switch (x)

7.         {

8.         case a:

9.             printf("yes ");

10.         case b:

11.             printf("no\n");

12.             break;

13.         }

14.     }

a) yes no
b) yes
c) no
d) Compile time error

Answer: d

10. What is the output of this C code?

1.     #include 

2.     #define max(a) a

3.     int main()

4.     {

5.         int x = 1;

6.         switch (x)

7.         {

8.         case max(2):

9.             printf("yes\n");

10.         case max(1):

11.             printf("no\n");

12.             break;

13.         }

14.     }

a) yes no
b) yes
c) no
d) Compile time error

Answer: c

11. What is the output of this C code?

1.     #include 

2.     int main()

3.     {

4.         switch (printf("Do"))

5.         {

6.         case 1:

7.             printf("First\n");

8.             break;

9.         case 2:

10.             printf("Second\n");

11.             break;

12.         default:

13.             printf("Default\n");

14.             break;

15.         }

16.     }

a) Do
b) DoFirst
c) DoSecond
d) DoDefault

Answer: c

12. Comment on the output of this C code?

1.     #include 

2.     int main()

3.     {

4.         int a = 1;

5.         switch (a)

6.         case 1:

7.             printf("%d", a);

8.         case 2:

9.             printf("%d", a);

10.         case 3:

11.             printf("%d", a);

12.         default:

13.             printf("%d", a);

14.     }

a) No error, output is 1111
b) No error, output is 1
c) Compile time error, no break statements
d) Compile time error, case label outside switch statement

Answer: d

13. Switch statement accepts.

a) int
b) char
c) long
d) all of the mentioned

Answer: d

14. Comment on the output of this C code?

1.     #include 

2.     int main()

3.     {

4.         int a = 1;

5.         switch (a)

6.         {

7.         case a:

8.             printf("Case A ");

9.         default:

10.             printf("Default");

11.         }

12.     }

a) Output: Case A
b) Output: Default
c) Output: Case A Default
d) Compile time error

Answer: d

15. Comment on the output of this C code?

1.     #include 

2.     switch (ch)

3.     {

4.     case 'a':

5.     case 'A':

6.         printf("true");

7.     }

a) if (ch == ‘a’ && ch == ‘A’) printf(“true”);
b) if (ch == ‘a’)
    if (ch == ‘a’) printf(“true”);
c) if (ch == ‘a’ || ch == ‘A’) printf(“true”);
d) none of the mentioned

Answer: c