This set of Data Structures & Algorithms Multiple Choice Questions & Answers (MCQs) focuses on “Strand Sort”.

**1. Strand sort is a comparison based sorting algorithm.****A) true**

B) false**Explanation**: Pigeonhole sort is an example of a sorting algorithm that uses comparisons. This is because it sorts a list by comparing the values of the elements in the list.

**2. Strand sort is a stable sorting algorithm.****A) true**

B) false**Explanation: **A good example of a stable sorting algorithm is the strand sort. Since the elements with similar values appear in the output array in the same order as they did in the input array, this is the case.

**3. What is the average time complexity of strand sort?**

A) O(n)

B) O(n log n)**C) O(n ^{2})**

D) O(n

^{2}log n)

**Explanation:**Strand sort has an average time complexity of O. (n2). As a result, it isn’t as fast as easy sort or merge sort.

**4. What is the best case time complexity of strand sort?****A) O(n)**

B) O(n log n)

C) O(n^{2})

D) O(n^{2} log n)**Explanatio**n: Strand sort has an O time complexity in the best case scenario (n). It happens when the input list has already been sorted.

**5. What is the worst case time complexity of strand sort?**

A) O(n)

B) O(n log n)**C) O(n ^{2})**

D) O(n

^{2}log n)

**Explanation:**Strand sort has a worst-case time complexity of O. (n2). When the input array is in reverse ordered order, this error occurs.

**6. Strand sort algorithm used which of the following method for sorting a list**?

A) merging**B) selection**

C) insertion

D) partitioning**Explanation: **For sorting any given list, the strand sort method is used. This is due to the fact that it selects the strands of sorted elements from the input list.

**7. Which of the following is an adaptive sorting algorithm?**

A) heap sort**B) strand sort**

C) selection sort

D) merge sort**Explanation: **Strand sort is a sorting algorithm that is adaptable. This is because when the input list is almost sorted, it performs better.

**8. Which one of the following sorting algorithm requires recursion?**

A) pigeonhole sort**B) strand sort**

C) insertion sort

D) counting sort**Explanation: **Strand sort’s algorithm necessitates the use of recursion to implement. The remaining choices, on the other hand, use iterative methods in their sorting algorithms.

**9. Strand sort is most efficient for data stored in?****A) linked list**

B) arrays

C) trees

D) graphs**Explanation:** Strand sort is most useful when data is stored in a linked list because it requires a lot of insertions and deletions, which a linked list can handle quickly. Using an array will greatly increase the time complexity.

**10. In which of the following case strand sort is most efficient?****A) when input array is already sorted**

B) when input array is reverse sorted

C) when input array is large

D) when input array is has randomly spread elements**Explanation: **Strand sort works best when the input array has already been sorted. It has linear time complexity in this case.

**11. What is the auxiliary space complexity of strand sort?****A) O(n)**

B) O(1)

C) O(log n)

D) O(n log n)**Explanation:** Strand sort has an auxiliary space complexity of O. (n). It’s because an n-by-n sub-list must be preserved.

**12. Which of the following sorting algorithm is not in place?**

A) quick sort**B) strand sort**

C) cycle sort

D) heap sort**Explanation: **The auxiliary space complexity of strand type is O. (n). As a result, it’s not a sorting algorithm that works in real time.

Sorting is the method of arranging items from a set in a logical order. A list of words, for example, may be sorted alphabetically or by volume. The efficiency of a sorting algorithm, like that of searching, is proportional to the number of items being processed. However, the following are some of the slowest sorting algorithms: Sorting Stooges: A recursive sorting algorithm known as a Stooge sort. It separates and sorts the list of sections in a recursive manner. Bubble sort is very slow compared to other sorting algorithms like quicksort, with a worst-case complexity of O(n2). On the plus side, it’s one of the simplest sorting algorithms to grasp and programme from scratch.