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SUBEX-Placement Paper-14 January 2007
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 <= (j && 1) && (m &&j); (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...
regards
lingam
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