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Objective Type Set
Online MCQ Assignment
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1. Which of the following are unary operators?
a) sizeof
b) –
c) ++
d) all of the mentioned

Answer: d [Reason:] 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 macro definition
d) None of the mentioned

Answer: d [Reason:] None.

3. Associativity of an operator are:
a) Right to Left
b) Left to Right
c) Random fashion
d) Both Right to Left and Left to Right

Answer: d [Reason:] None.

4. Which of the following method are 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

Answer: b [Reason:] None.

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

Answer: c [Reason:] 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

Answer: d [Reason:] None.

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

Answer: d [Reason:] None.

8. Comment on the output of this C code?

1. `    #include <stdio.h>`
2. `    int main()`
3. `    {`
4. `        int x = 3, i = 0;`
5. `        do {`
6. `            x = x++;`
7. `            i++;`
8. `        } while (i != 3);`
9. `        printf("%dn", x);`
10. `    }`

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

Answer: c [Reason:] None.

9. What is the output of this C code?

1. `    #include <stdio.h>`
2. `    int main()`
3. `    {`
4. `        int a = -1, b = 4, c = 1, d;`
5. `        d = ++a && ++b || ++c;`
6. `        printf("%d, %d, %d, %dn", a, b, c, d);`
7. `        return 0;`
8. `    }`

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

Answer: a [Reason:] None.

10. What is the output of this C code?

1. `    #include <stdio.h>`
2. `    int main()`
3. `    {`
4. `        int p = 10, q = 20, r;`
5. `        if (r = p = 5 || q > 20)`
6. `            printf("%d", r);`
7. `        else`
8. `            printf("No Outputn");`
9. `    }`

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