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Core Java - Interview Questions and Answers for 'Sort' - 19 question(s) found - Order By Newest

 Q1. Collections.sort can only be performed on ..

a. Set
b. List
c. Map
d. Any Collection implementation
Core Java
Ans. List

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   Like         Discuss         Correct / Improve     collections   java   sorting

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 Q2. If I try to add Enum constants to a TreeSet, What sorting order will it use ?
Ans. Tree Set will sort the Values in the order in which Enum constants are declared.

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   Like         Discuss         Correct / Improve     java   collections   set   treeset   enum   sorting   technical lead


 Q3. Which of the following collection maintain its elements in Natural Sorted order ?

a. HashMap
b. TreeMap
c. LinkedHashMap
d. LinkedMap
Ans. TreeMap

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   Like         Discuss         Correct / Improve     treemap   collections   java   sorted collections   map


 Q4. Explain various Searching and Sorting Algorithms ?Algorithm
 This question was recently asked at 'HeadStrong,ServiceNow'.This question is still unanswered. Can you please provide an answer.


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   Like         Discuss         Correct / Improve     Search Algorithm  Sorting Algorithm     Asked in 2 Companies      basic        frequent


 Q5. Which sorting algorithm is used by Collections.sort() in Java ?Core Java
Ans. The sorting algorithm is a modified mergesort. This algorithm offers guaranteed n log(n) performance.

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   Like         Discuss         Correct / Improve     java   algorithm   collections   collections.sort   sorting algorithm      expert

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 Q6. If we add Enum constants to a sorted collection ( Treemap , TreeSet ), What will be the order in which they will be maintained ?

a. Sorted Collection wont maintain them in any order.
b. Insertion Order
c. Order in which constants are declared.
d. Natural Sorting Order.
Ans. Order in which constants are declared.

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   Like         Discuss         Correct / Improve     enum   collections   sorted collections   treemap   treeset   compareto   comparable   java


 Q7. Write code to sort elements of a set
Ans. http://javasearch.buggybread.com/CodeSnippets/searchCodeSamples.php?&category=code&searchOption&keyword=952

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   Like         Discuss         Correct / Improve     set  collections  sorting  treeset  code  coding


 Q8. Write a java program to implement Quick sort ?Core Java
Ans. http://www.programcreek.com/2012/11/quicksort-array-in-java/

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   Like         Discuss         Correct / Improve     quick sort  sort     Asked in 2 Companies        frequent


 Q9. Which data structure would you recommend for ordered and sorted data?Core Java
Ans. TreeSet and TreeMap are used for maintaining sorted elements.

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   Like         Discuss         Correct / Improve     ordered collections  sorted collections     Asked in 1 Companies      basic        frequent


 Q10. Write an algorithm / java program for Heap Sort ?Algorithm
Ans. https://www.geeksforgeeks.org/heap-sort/

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   Like         Discuss         Correct / Improve     sorting  heap sort     Asked in 1 Companies        frequent


 Q11. Write any sorting algorithm.Algorithm
Ans. https://javasearch.buggybread.com/InterviewQuestions/questionSearch.php?searchOption=label'

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   Like         Discuss         Correct / Improve     Algorithm  Sorting Algorithm     Asked in 4 Companies      basic        frequent


 Q12. Explain bubble sort.Algorithm
Ans. array is traversed from first element to last element. Here current element is compared with next element. If current element is greater than next element it is swapped.

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 Q13. Write a Program to merge two sorted arrays ?Data Structure
Ans. We can merge two sorted array by using quick sort algorithm

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 Q14. Write a Program for insertion sort.Core Java
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   Like         Discuss         Correct / Improve     program  code  coding  insertion sort   sort     Asked in 1 Companies


 Q15. What is the difference between TreeSet and TreeMap ?Core Java
Ans. TreeSet contains only values as elements whereas TreeMap contains Key value pairs.

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   Like         Discuss         Correct / Improve     reeMap  TreeSet  Collections  sorted collection     Asked in 1 Companies        rare


  Q16. Write code to sort an array.Algorithm
Ans. https://www.geeksforgeeks.org/arrays-sort-in-java-with-examples/

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   Like         Discuss         Correct / Improve     array  sorting     Asked in 16 Companies      basic        frequent


 Q17. How to sort objects based on one of the field ?Core Java
Ans. Using comparable and comparator and sorted collections like TreeSet or TreeMap.

or

use stream api from java 8 onwards which internally refers to comparable and comparator through lambda expressions

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   Like         Discuss         Correct / Improve     sort  sorting  comprator  comparable  treeset  treemap  sorting collections     Asked in 1 Companies      Basic        frequent


 Q18. Explain In place sorting algorithm ?Algorithm
 This question was recently asked at 'Reddit,ServiceNow'.This question is still unanswered. Can you please provide an answer.


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   Like         Discuss         Correct / Improve     sorting algorithm   in place sorting algorithm     Asked in 2 Companies


 Q19. Difference between TreeMap and SortedMap ?Core Java
Ans. sortedMap is an interface ,while TreeMap is an implementation of sortMap.

We can not create an instance of sortedMap but we can create an instance of treeMap

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   Like         Discuss         Correct / Improve     treemap  sortedmap



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