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HCL Interview Question for Software Engineer / Developers


Country: India
Interview Type: Phone Interview
More Questions from This Interview



Comment hidden because of low score. Click to expand.
8
of 8 vote

bad_alloc execption is thrown. But if nothrow is used then it returns NULL on failure.

int* p = new int[10]; // bad_alloc exception will be thrown if allocation fails

int* p = new (nothrow) int[10] // p will be NULL if fails

- Pankaj August 11, 2013 | Flag Reply
Comment hidden because of low score. Click to expand.
0
of 0 votes

a complete example below that you can compile

#include <new>

int main()
{
    unsigned long long n = 1ULL << 40;

    char *x = new (std::nothrow) char[n];
}

- Anonymous August 24, 2013 | Flag
Comment hidden because of low score. Click to expand.
0
of 0 vote

If you use normal new then if the allocation fails, NULL WILL NOT be assigned to the pointer because internally it uses temp pointer to allocate memory and only if it is successful, then its address is copied to your poiniter, else exception is thrown.

- crystal.rishi2 August 12, 2013 | Flag Reply
Comment hidden because of low score. Click to expand.
0
of 0 vote

I think the interviewer is looking for the answer wherein it calls the new_handler.

- Random February 16, 2014 | Flag Reply
Comment hidden because of low score. Click to expand.
0
of 0 vote

set_new_handler allows you to specify a function to be called when new operator fails to allocate memory.
nothrow is limited utility as it applies only for memory allocation, subsequent call to constructor may throw an exception.

- amruta June 11, 2014 | Flag Reply


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