C Programming MCQ – Switch Statement

This set of C Multiple Choice Questions & Answers (MCQs) focuses on “Switch Statement”.

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

1. What will be the output of the following C code? (Assuming that we have entered the value 1 in the standard input)

```
    #include <stdio.h>
```
```
    void main()
```
```
    {
```
```
        double ch;
```

        printf("enter a value between 1 to 2:");

```
        scanf("%lf", &ch);
```
```
        switch (ch)
```
```
        {
```
```
           case 1:
```
```
              printf("1");
```
```
              break;
```
```
           case 2:
```
```
              printf("2");
```
```
              break;
```
```
        }
```
```
    }
```

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

Answer: a
Explanation: None.

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2. What will be the output of the following C code? (Assuming that we have entered the value 1 in the standard input)

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```
    #include <stdio.h>
```
```
    void main()
```
```
    {
```
```
        char *ch;
```

        printf("enter a value between 1 to 3:");

```
        scanf("%s", ch);
```
```
        switch (ch)
```
```
        {
```
```
           case "1":
```
```
              printf("1");
```
```
              break;
```
```
           case "2":
```
```
              printf("2");
```
```
              break;
```
```
        }
```
```
    }
```

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

Answer: b
Explanation: None.

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3. What will be the output of the following C code? (Assuming that we have entered the value 1 in the standard input)

```
    #include <stdio.h>
```
```
    void main()
```
```
    {
```
```
        int ch;
```

        printf("enter a value between 1 to 2:");

```
        scanf("%d", &ch);
```
```
        switch (ch)
```
```
        {
```
```
           case 1:
```
```
              printf("1\n");
```
```
           default:
```
```
              printf("2\n");
```
```
        }
```
```
    }
```

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

Answer: c
Explanation: None.

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4. What will be the output of the following C code? (Assuming that we have entered the value 2 in the standard input)

```
    #include <stdio.h>
```
```
    void main()
```
```
    {
```
```
        int ch;
```

        printf("enter a value between 1 to 2:");

```
        scanf("%d", &ch);
```
```
        switch (ch)
```
```
        {
```
```
           case 1:
```
```
              printf("1\n");
```
```
              break;
```
```
              printf("hi");
```
```
           default:
```
```
              printf("2\n");
```
```
        }
```
```
    }
```

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

Answer: d
Explanation: None.

5. What will be the output of the following C code? (Assuming that we have entered the value 1 in the standard input)

```
    #include <stdio.h>
```
```
    void main()
```
```
    {
```
```
        int ch;
```

        printf("enter a value between 1 to 2:");

```
        scanf("%d", &ch);
```
```
        switch (ch, ch + 1)
```
```
        {
```
```
           case 1:
```
```
              printf("1\n");
```
```
              break;
```
```
           case 2:
```
```
              printf("2");
```
```
              break;
```
```
        }
```
```
    }
```

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

Answer: b
Explanation: None.

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

```
    #include <stdio.h>
```
```
    int main()
```
```
    {
```
```
        int a = 1, b = 1;
```
```
        switch (a)
```
```
        {
```
```
           case a*b:
```
```
              printf("yes ");
```
```
           case a-b:
```
```
              printf("no\n");
```
```
              break;
```
```
        }
```
```
    }
```

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

Answer: c
Explanation: None.

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

```
    #include <stdio.h>
```
```
    int main()
```
```
    {
```
```
        int x = 97;
```
```
        switch (x)
```
```
        {
```
```
           case 'a':
```
```
              printf("yes ");
```
```
              break;
```
```
           case 97:
```
```
              printf("no\n");
```
```
              break;
```
```
        }
```
```
    }
```

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

Answer: c
Explanation: None.

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

```
    #include <stdio.h>
```
```
    int main()
```
```
    {
```
```
        float f = 1;
```
```
        switch (f)
```
```
        {
```
```
           case 1.0:
```
```
              printf("yes\n");
```
```
              break;
```
```
           default:
```
```
              printf("default\n");
```
```
        }
```
```
    }
```

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

Answer: d
Explanation: None.

Sanfoundry Global Education & Learning Series – C Programming Language.

To practice all areas of C language, here is complete set of 1000+ Multiple Choice Questions and Answers.

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Manish Bhojasia, a technology veteran with 20+ years @ Cisco & Wipro, is Founder and CTO at Sanfoundry. He lives in Bangalore, and focuses on development of Linux Kernel, SAN Technologies, Advanced C, Data Structures & Alogrithms. Stay connected with him at LinkedIn.

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