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Soft Paper Aptitude - General by Hello

Details of Soft Paper Aptitude - General by Hello conducted by Hello for job interview.
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Sample Question Paper

What is diners phylosophers algorithm.
What is atomicity.Explain
Give an example of source- level debugger in unix/linx.
What is Pre-emptive multitasking.
Do not remember this one.
DataStructures: (ONly 5 Questions)

Where will the parameters be stored when a function is called in a program.
What is recursion?What are its disadvantages.
Which one is the best and efficient sort?
Networking:(Only 5 Questions)

ASN.1 belongs to which layer.
Give an example of popular Transport Layer Protocol
What is the netmask of Class B IP address?
 Explain CSMA/CD.
Given a size from 0-7 what would be the least window size.
C Language (Total 13 Questions)

main()
{
  printf("%d",printf("HelloSoft"));
} Output?
case 1: case 2:
      typedef Struct { typedef Struct {
                 int a; char p;
                 char b; int q;
                 int d; char k;
                 char e; int l;
                  }A; }A;
     Assuming ,packing, is not enabled, which case will give an error of Sizeof(A) less.
 main()
  {
   int i=3;
   printf("%d %d %d",i++,i,++i);
    }
main()
    {
      int i=10;
      int j,k=5;
      int a[10];
      for(j=0;j<10;j++)
      a[j]=(i+k)+(i*k);
    }
 Optimize the above code.
Write In Order Tree Traversal Pseudo-code.
 main()
    {
   int *p=0x100;
   int *q=0x100;
   int k=p*q;
   printf("%x\n",k);
   } Output ?
Char* foo(Str...) {
     char str[4];
     strcpy(str,"HelloSoft");
     return str;
      } Output?
int a[10][20][30][40];
       int *p
        How to access an element of a using p?
main()
   {
      int i=10;
      if(i>20)
      if(i==10)
         print("Hi");
       else
          printf("Bye");
     } Output ?
main()
   {
    float f;
    int i;
    //something like this   not remember these 4 questionsexactly
    f=(float *)malloc(sizeof((float *)*4));
   }
         Some Question was asked  not remenber .