Question
Which sorting algorithm is considered the most
efficient for large datasets with no additional memory constraints?Solution
Merge sort is a highly efficient sorting algorithm for large datasets due to its divide-and-conquer approach. It divides the array into smaller subarrays, sorts them individually, and then merges them in a sorted manner. With a time complexity of O(nlog n) in all cases (best, average, and worst), merge sort is highly predictable and handles large datasets efficiently. It is stable and works well for linked lists and external sorting, where data cannot fit into main memory. Why Other Options Are Incorrect :
- Bubble Sort : This has a worst-case time complexity of O(n2) and is inefficient for large datasets.
- Selection Sort : While more efficient than bubble sort, its time complexity is still O(n2).
- Quick Sort : Quick sort has an average time complexity of O(nlog n), but in the worst case (when the pivot is poorly chosen), it can degrade to O(n2).
- Insertion Sort : This is suitable for small datasets or nearly sorted data but has a time complexity of O(n2) for large, unsorted datasets.
Which of the following sorting algorithms has a worst-case time complexity of O(n^2)?
What is the purpose of an index in a database?
Which of the following is a characteristic of a well-formed transaction?
The list.index(x[, start[, end]]) is used to ___.
What is the purpose of the control unit in the CPU?
Which concurrency control technique allows a transaction to read uncommitted data?
Which component of a compiler interacts directly with the lexer?
FAT stands for?
Which tree traversal visits the nodes in the order: left, root, right?
The size of IP address in IPV6 is