Table of Contents
- 1 What is the effect of dangling pointer?
- 2 What is the problem of dangling references How is it addressed in different languages?
- 3 What is dangling pointer What precaution should be taken to avoid it?
- 4 Why are dangling references created and why are they a problem?
- 5 What is the use of pointers explain the difference between dangling and void pointers with examples?
What is the effect of dangling pointer?
The system may reallocate the previously freed memory, and if the program then dereferences the (now) dangling pointer, unpredictable behavior may result, as the memory may now contain completely different data.
What is the problem of dangling references?
The classic dangling reference problem, where a pointer references storage space that has been deallocated, is usually very difilcult to detect and trace. Language run-time systems commonly do not provide any protection against dangling reference errors due to the overhead that maybe incurred by doing so.
What is the problem of dangling references How is it addressed in different languages?
Dangling references do not exist in garbage collected languages because objects are only reclaimed when they are no longer accessible (only garbage is collected). In some languages or framework, you can use “weak references”, which can be left dangling since they are not considered during collection passes.
What is a dangling reference and why are they a problem?
3 Answers. A dangling reference is a reference to an object that no longer exists. Garbage is an object that cannot be reached through a reference. Dangling references do not exist in garbage collected languages because objects are only reclaimed when they are no longer accessible (only garbage is collected).
What is dangling pointer What precaution should be taken to avoid it?
The dangling pointer errors can be avoided by initializing the pointer to the NULL value. If we assign the NULL value to the pointer, then the pointer will not point to the de-allocated memory. Assigning NULL value to the pointer means that the pointer is not pointing to any memory location.
What are the two problems associated with pointers?
Two problems associated with pointer types are dangling pointers and lost heap dynamic variables.
Why are dangling references created and why are they a problem?
What causes a dangling pointer in C++?
Dangling pointers is a situation where you have valid pointers in the stack, but it is pointing to invalid memory. You might end up in this situation when you deallocate the heap memory before the pointers in stack deallocated.
What is the use of pointers explain the difference between dangling and void pointers with examples?
A dangling pointer is a pointer that occurs at the time when the object is de-allocated from memory without modifying the value of the pointer. A void pointer is a pointer that can point to any data type. It points to the deleted object. A void pointer can be assigned the address of any data type.