Tech Test for ECE-1 RISE , TEST-1

1.Which of the following is not a valid variable name declaration?

a) int __a3;

b) int __3a;

c) int __A3;

d) None of the mentioned

2. C99 standard guarantess uniqueness of _____ characters for external names.

a) 31

b) 6

c) 12

d) 14

3What is the output of this C code?

• #include <stdio.h>

• int main()

• {

• char chr;

• chr = 128;

• printf("%d\n", chr);

• return 0;

• }

a) 128

b) -128

c) Depends on the compiler

d) None of the mentioned

Answer:b

Explanation:signed char will be a negative number.

4. #include <stdio.h>

 int main()

 {

 enum {ORANGE = 5, MANGO, BANANA = 4, PEACH};

 printf("PEACH = %d\n", PEACH);

 }

a) PEACH = 3

b) PEACH = 4

c) PEACH = 5

d) PEACH = 6

5. # define X(a,b,c) a>b&&a>c?a:b>c?b:c; this macro is used to perform _____________________

6. char ch=’97’ the value of ch is ______________

7. #include <stdio.h>

 int main()

 {

 int i = 3;

 int l = i / -2;

 int k = i % -2;

 printf("%d %d\n", l, k);

 return 0;

 }

-1 , 1

8. Evaluate int x = 5 * 9 / 3 + 9;

24

• Evaluate 4*8/2+3*2/2

(19)

10. int n1=10;

 Int n2=n1+++++n1+--n1;

What is the value of n2? ________________________

11. #include <stdio.h>

 void main()

 {

 int x = 1, y = 0, z = 5;

 int a = x && y || z++;

 printf("%d", z);

 }

What it produces out put6

12. • int x = 1, y = 0, z = 3;

• x > y ? printf("%d", z) : return z;

 What is the out put ________________

13. #include <stdio.h>

 int main()

 {

 int i = 0, j = 0;

 if (i && (j = i + 10))

 //do something

 ;

 }

0

14.

int i = 0, j = 0;

if (i && (j = i + 10))

//do something

;

The value of j is 0

15.

int a = 1, b = 1, d = 1;

printf("%d, %d, %d", ++a + ++a+a++, a++ + ++b, ++d + d++ + a++);

o/p is 15,4,5

16. int a = !0;

printf("\n.....%d",a);

ans : 1