What is the difference between Pointer and a Reference?
When you would use them?
- 4 Answers
- 11692 Views
- Wipro, I also Faced
- E-Mail Answers
Answers were Sorted based on User's Feedback
Answer / srihariraju
A reference just renames a memory location for the
reader/programmer. Its more like renaming a constant with
#define. The reference does not really 'contain' the
address, instead the comiler *could* just substitute the
address for the reference at the assembly code level.
A pointer is a variable (it 'must' have a memory location
of its own (barring odd compiler tricks)) that *can* be
used like a reference or it can point to nothing (NULL) (a
reference cannot do that) and a pointer can get new memory
from the os (new command) while a reference must 'point' to
existing memory.
| Is This Answer Correct ? | 14 Yes | 0 No |
Answer / man
Reference is alias of a variable i.e. a constant pointer
which reference to a variable and can not be NULL.
You can not can get the address of ref. They are used as a
variable.
Pointers are variale that hold address of variable and can
be NULL. And can point to any number of variable.
| Is This Answer Correct ? | 3 Yes | 0 No |
Answer / vinay bondade
A Pointer is not a condt pointer unless you define it in
that way,but a referrence on the contrary is a const
pointer by default and adding to this implementation it is
deferrenced automatically.
| Is This Answer Correct ? | 1 Yes | 3 No |
Answer / nav
pointer are variable and no need to be initilise,but
refrence is the rename of variable and must be
initilise.pointer also assign null value but reference not
assign null value.
| Is This Answer Correct ? | 1 Yes | 3 No |
How did c++ get its name?
What is the difference between mutex and binary semaphore?
When the constructor of a base class calls a virtual function, why doesn't the override function of the derived class gets called?
What do you mean by Stack unwinding?
Will a catch statement catch a derived exception if it is looking for the base class?
When there is a global variable and local variable with the same name, how will you access the global variable?
How do you print for example the integers 3,2,1,5,4 in a binary tree within the console in format where it looks like an actual binary tree?
Declare a class vehicle and make it an abstract data type.
Is swift faster than c++?
What is the basic difference between C and C++?
What is a pdb file?
What are virtual functions in c++?
STL 
