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Compare and contrast Linked lists and arrays.

Question

Compare and contrast Linked lists and arrays.

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Solution

Sure, here is a comparison and contrast of Linked Lists and Arrays:

  1. Data Structure: An array is a static data structure, meaning the size is fixed when it is created. It stores elements in contiguous memory locations. On the other hand, a linked list is a dynamic data structure. The size can change during the execution of the program, and it stores elements in any available location in the memory.

  2. Memory Allocation: In an array, memory is allocated at compile time, while in a linked list, memory is allocated at runtime.

  3. Insertion/Deletion: Insertion and deletion of an element in an array is expensive as the room has to be made for the new elements and to delete an element, the subsequent elements have to be shifted. In a linked list, these operations can be done more efficiently.

  4. Random Access: Arrays allow random access of elements which makes accessing elements by index faster. Linked lists, however, do not allow random access as it does not have indexes for its elements.

  5. Memory Usage: Linked lists use more memory per element than arrays, because linked list uses extra storage for pointers.

  6. Performance: Operations like insertion and deletion in arrays consume a lot of time. On the other hand, the performance of these operations in a Linked Lists are fast.

  7. Usage: Arrays are used when the number of elements to be stored is known and lesser memory is required. Linked lists are used when the number of elements to be stored is not known and larger memory is required.

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Which of the following statements accurately describes the differences between arrays and linked lists? a. Arrays store elements in contiguous memory locations, are static data structures, and are generally faster for random access. Linked lists store elements in non-contiguous memory locations, are dynamic data structures, and are better for operations like insertion and deletion. b. Arrays and linked lists both store elements in contiguous memory locations but differ in that arrays are dynamic while linked lists are static. c. Arrays and linked lists are both dynamic data structures and store elements in non-contiguous memory locations, but arrays are faster for insertion and deletion operations. d. Arrays are dynamic and store elements in non-contiguous memory locations, while linked lists are static and store elements in contiguous memory locations.

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