Contents
Can Mergesort be done in place?
Unlike some (efficient) implementations of quicksort, merge sort is a stable sort. Merge sort’s most common implementation does not sort in place; therefore, the memory size of the input must be allocated for the sorted output to be stored in (see below for variations that need only n/2 extra spaces).
Does Java allow multithreading?
Java is a multi-threaded programming language which means we can develop multi-threaded program using Java. Multi-threading enables you to write in a way where multiple activities can proceed concurrently in the same program. …
Is Mergesort an in place algorithm explain?
Merge sort is not in place because it requires additional memory space to store the auxiliary arrays. The quick sort is in place as it doesn’t require any additional storage.
Would adding multi-threading to sorting algorithm improve its performance?
An experiment was made, in which the multithreaded version was run through a data set, using a different number of threads for each run. The re- sults were then compared to a traditional implementation of the algorithm. They find that multithreading the algorithm improves efficiency up to 40 percent, using two threads.
What is in-place sorting algorithm?
Definition: A sort algorithm in which the sorted items occupy the same storage as the original ones. These algorithms may use o(n) additional memory for bookkeeping, but at most a constant number of items are kept in auxiliary memory at any time. Also known as sort in place.
What are the benefits of multi threaded programming in Java?
Benefits of Multithreading*
- Improved throughput.
- Simultaneous and fully symmetric use of multiple processors for computation and I/O.
- Superior application responsiveness.
- Improved server responsiveness.
- Minimized system resource usage.
- Program structure simplification.
- Better communication.
What is thread safe in Java?
thread-safety or thread-safe code in Java refers to code which can safely be used or shared in concurrent or multi-threading environment and they will behave as expected. any code, class, or object which can behave differently from its contract on the concurrent environment is not thread-safe.
How many number of comparisons are required in insertion sort to sort a file if the file is already sorted?
Part (b) of Figure 5.15 shows that only four comparisons are required by the algorithm when the input list is already presorted. This is different from the selection sort algorithm which always requires a fixed number of comparisons to sort N items, regardless of their original order.
Why is Quicksort in-place?
So the space efficiency of Quicksort is O(log(n)). This is the space required to maintain the call stack. Now, according to the Wikipedia page on Quicksort, this qualifies as an in-place algorithm, as the algorithm is just swapping elements within the input data structure.