Which of the following is an application of XOR-linked lists?Implementing stacksImplementing queuesMemory-efficient linked list representationCaching data structures
Question
Which of the following is an application of XOR-linked lists?Implementing stacksImplementing queuesMemory-efficient linked list representationCaching data structures
Solution
The application of XOR-linked lists is in the memory-efficient linked list representation. XOR-linked lists, also known as XOR lists or Memory efficient Doubly Linked Lists, are used to reduce the memory required for their storage.
Here's a step-by-step explanation:
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In a regular doubly linked list, each node contains two pointers: one to the next node in the list and one to the previous node. This allows for efficient traversal in both directions but at the cost of extra memory for storing two pointers per node.
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XOR-linked lists, on the other hand, only store one address per node. This address is the XOR of the address of the previous node and the address of the next node.
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To traverse an XOR-linked list, you start at one end and keep track of the previous node you visited. You can then use the XOR operation to find the next node.
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This makes XOR-linked lists more memory-efficient than regular doubly linked lists, which is particularly useful in systems with limited memory.
So, the correct answer is "Memory-efficient linked list representation". XOR-linked lists are not typically used for implementing stacks, queues, or caching data structures.
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