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SUBEX PAPER ON 14th JANUARY AT BANGALORE

Hi All,

 I attended the test on 14th Jan 2007 conducted by Subex Azure ltd.The paper had C programming mainly on pointers.

Part 1: 20 questions in C (1/2 an hour duration)

Part2: A program to be written (1/2 an hour)

Part1:

Assume

       sizeof(char) = 2

       sizeof(int) = 4

       sizeof(float)  = sizeof(pointer) = 4

       sizeof(double)  = 8 

1.

#define _LINE_ 10

main()

{

printf("%d",_LINE_);

}

2.

#define STRINGDEF(expr) #expr

 printf(STRINGDEF(10));

3.

calculate the following postfix expression

  + * + 2 6 - 1 5 6

4.

int i = 260;

float f = 12.2;

char c = ,a,;

char *ptr1,*ptr2,*ptr3;

ptr1 = (char *)&i;

ptr2 = (char *)&f;

ptr3 = (char *)&c;

printf ("%c|%c|%c",*ptr1,*ptr2,*ptr3);

 options:

a. 260|12|97

b. 260|12|a

5.

int main(int argc,char **argv)

{

int *p;

p = malloc(10 * sizeof(int i));

realloc(p,0);

/*(i) */

return 0;

What is the state of the marked line (i)?

options:

a. dangling pointer p

b. defined

c. memory leakage during malloc

6.

main()

{

int i = 0;

if(i++,i)

   return 1;

else

   return 0;

}

options:

1.Always 0

2.Always 1

7.

 struct

{

unsigned int is_keyword : 1;

unsigned int is_extern : 1;

unsigned int is_static : 1;

}flag;

/*print the value of is_keyword */

options:

1. Compile error

2. 1

3. Error, before the :

8.

int foo(void)

{

char *p;

int i;

if (i && (*p=10))

return 1;

else

return 0;

}

what will be the outcome if the foo function is called ?

9.

int m =1;

int l =0;

int i = -1;

int j =1;

....

for(; i > 4))

/*sorry i do not exactly remember the for loop,but it actually look like the above for loop */

.....

How many times will the loop execute,

options:

a. 8

b. 1

c. infite times

10.

struct

{

char *p;

int i;

}mem;

....

struct mem member = {"value, 3"},2;

....

options:

1. compile erroe

2. state defined

11.

struct

 {

  char *name;

  int i;

  union

   {

    char var;

    int integer;

    float var2;

   }

 }ARRAY_SIZE(10);

....

//see the above assumptions

printf("%d",sizeof(ARRAY_SIZE));

....

options

1.20

2.200

3.16

4.160

and rest i do not remember....

but lot on pointers and preprocessors.

Part2:

Write a program to get strings and to substitute character from string1 to string2

(equv to UNIX command tr)

for example:

string1: "abc"

string2: "def"

the occurrence of ,a, will be replaced by ,d, , ,b, will be replaced by ,e, , ,c, will be replaced by ,f,

AND for less complexity assume the string1 and string2 are of same size
thatz all guys...
Provided by www.YuvaJobs.com - Mt Carmel College, Bangalore ,14  January  2007