C Programming Questions and Answers - Precedence and Order of Evaluation - 6

This set of C Multiple Choice Questions & Answers (MCQs) focuses on “Precedence and Order of Evaluation – 6”.

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

1. Which of the following are unary operators?
a) sizeof
b) –
c) ++
d) all of the mentioned
View Answer

Answer: d
Explanation: None.

2. Where in C the order of precedence of operators do not exist?
a) Within conditional statements, if, else
b) Within while, do-while
c) Within a macro definition
d) None of the mentioned
View Answer

Answer: d
Explanation: None.

3. Associativity of an operator is ___________
a) Right to Left
b) Left to Right
c) Random fashion
d) Both Right to Left and Left to Right
View Answer

Answer: d
Explanation: None.

4. Which of the following method is accepted for assignment?
a) 5 = a = b = c = d;
b) a = b = c = d = 5;
c) a = b = 5 = c = d;
d) None of the mentioned
View Answer

Answer: b
Explanation: None.

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5. Which of the following is NOT possible with any 2 operators in C?
a) Different precedence, same associativity
b) Different precedence, different associativity
c) Same precedence, different associativity
d) All of the mentioned
View Answer

Answer: c
Explanation: None.

6. Which of the following is possible with any 2 operators in C?
a) Same associativity, different precedence
b) Same associativity, same precedence
c) Different associativity, different precedence
d) All of the mentioned
View Answer

Answer: d
Explanation: None.

7. Which of the following operators has the lowest precedence?
a) !=
b) &&
c) ?:
d) ,
View Answer

Answer: d
Explanation: None.

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

```
    #include <stdio.h>
```
```
    int main()
```
```
    {
```
```
        int x = 3, i = 0;
```
```
        do {
```
```
            x = x++;
```
```
            i++;
```
```
        } while (i != 3);
```
```
        printf("%d\n", x);
```
```
    }
```

a) Undefined behaviour
b) Output will be 3
c) Output will be 6
d) Output will be 5
View Answer

Answer: b
Explanation: None.

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

```
    #include <stdio.h>
```
```
    int main()
```
```
    {
```
```
        int a = -1, b = 4, c = 1, d;
```
```
        d = ++a && ++b || ++c;
```

        printf("%d, %d, %d, %d\n", a, b, c, d);

```
        return 0;
```
```
    }
```

a) 0, 4, 2, 1
b) 0, 5, 2, 1
c) -1, 4, 1, 1
d) 0, 5, 1, 0
View Answer

Answer: a
Explanation: None.

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

```
    #include <stdio.h>
```
```
    int main()
```
```
    {
```
```
        int p = 10, q = 20, r;
```
```
        if (r = p = 5 || q > 20)
```
```
            printf("%d", r);
```
```
        else
```
```
            printf("No Output\n");
```
```
    }
```

a) 1
b) 10
c) 20
d) No Output
View Answer

Answer: a
Explanation: None.

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