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Technical - C & C++ by HP

Details of Technical - C & C++ by HP conducted by HP for job interview.
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Question Consist of  4 parts.                  Duration of exam is 60 min.

C---------20Q

C++ ----15Q

Unix-----15Q

Apptitude--15Q

                             C  And C++

i=23, j=4, c=0;
c=i++-++j;
o/p?

#define CUBE(x)     x*x*x
#define MUL3(x,y) 3*x*y
#define ADD(x)       x+y
some statement maikng use of the preprocessors defined above............find o/p.

virtual destructors r used  for ?

2 questions on friend functions & classes

char c[]="123456789";
 i=4;
printf("%c %c", c[i], i[c]);
o/p?
one more question on these lines.

int *ptr;
 p=0;
 p++;
 printf("%u", p);
 o/p?
a. 0  b. garbage value  c. 4  d. none of the above

double i=0.0;
 switch(i)
    {
      case 0.0: 
      printf("jgdj");
      case 1.0:
      printf("ptoy");
             break;
    default:
           printf("hdfv");
}
o/p?

volatile int i;
in d above statement, is "volatile"
a. a type declaration b. type qualifier c. storage class d. none of the above

                        Unix

"bash" is a kind of shell in UNIX

primitive flavours of unix
options : a. BSD &Sys V b. LINUX & BSD c..

which of the folllowing is used 4 redirection in UNIX?      >, |, <, ^

wot is d UNIX terminology 4 multi-tasking?
a. time slicing b. pre-emptive ....... c. time division d.......

In UNIX if You try accessing a directory  for which u dont have permission, wot message is displayed?
a. permission denied   b. invalid user    c. access denied   d.........