Ask a Question

Explain Which of these methods can be used to obtain set of all keys in a map?

in Education by
Which of these methods can be used to obtain set of all keys in a map? (a) getAll() (b) getKeys() (c) keyall() (d) keySet() The question was posed to me in my homework. This intriguing question originated from Java.util in portion java.util – The Collections Framework of Java Select the correct answer from above options

1 Answer

0 votes
by
 
Best answer
The correct option is (d) keySet() To explain I would say: keySet() methods is used to get a set containing all the keys used in a map. This method provides set view of the keys in the invoking map.

Related questions

0 votes
Q: Explain Which of these method is used to remove all keys/values pair from the invoking map?
    Which of these method is used to remove all keys/values pair from the invoking map? (a) delete() (b) ... Collections Framework of Java Select the correct answer from above options...
asked Mar 1, 2022 in Education by JackTerrance
0 votes
Q: Explain Which of these method Map class is used to obtain an element in the map having specified key?
    Which of these method Map class is used to obtain an element in the map having specified key? (a) ... Collections Framework of Java Select the correct answer from above options...
asked Mar 1, 2022 in Education by JackTerrance
0 votes
Q: Which of these methods can be used to obtain set of all keys in a map?
    Which of these methods can be used to obtain set of all keys in a map? (a) getAll() (b) ... java programming questions and answers pdf, java interview questions for beginners...
asked Oct 25, 2021 in Education by JackTerrance
0 votes
Q: Explain Which of these methods is used to obtain an iterator to the start of collection?
    Which of these methods is used to obtain an iterator to the start of collection? (a) start() (b) ... Collections Framework of Java Select the correct answer from above options...
asked Mar 1, 2022 in Education by JackTerrance
0 votes
Q: Explain Which of these method of Locale class can be used to obtain country of operation?
    Which of these method of Locale class can be used to obtain country of operation? (a) getCountry() (b) ... Utility Classes of Java Select the correct answer from above options...
asked Feb 23, 2022 in Education by JackTerrance
0 votes
Q: Explain Which of these methods can randomize all elements in a list?
    Which of these methods can randomize all elements in a list? (a) rand() (b) randomize() (c) shuffle( ... Collections Framework of Java Select the correct answer from above options...
asked Mar 1, 2022 in Education by JackTerrance
0 votes
Q: Explain Which of these methods can be used to delete the last element in a LinkedList object?
    Which of these methods can be used to delete the last element in a LinkedList object? (a) remove() (b ... Collections Framework of Java Select the correct answer from above options...
asked Mar 1, 2022 in Education by JackTerrance
0 votes
Q: Explain Which of these methods can be used to move to next element in a collection?
    Which of these methods can be used to move to next element in a collection? (a) next() (b) move() ... The Collections Framework of Java Select the correct answer from above options...
asked Mar 1, 2022 in Education by JackTerrance
0 votes
Q: Explain Which of these methods deletes all the elements from invoking collection?
    Which of these methods deletes all the elements from invoking collection? (a) clear() (b) reset() (c) ... Collections Framework of Java Select the correct answer from above options...
asked Mar 1, 2022 in Education by JackTerrance
0 votes
Q: Explain Which of these is a method of ListIterator used to obtain index of previous element?
    Which of these is a method of ListIterator used to obtain index of previous element? (a) previous() (b ... Framework of Java Select the correct answer from above options...
asked Mar 1, 2022 in Education by JackTerrance
0 votes
Q: Explain Which of these object stores association between keys and values?
    Which of these object stores association between keys and values? (a) Hash table (b) Map (c) Array (d ... Collections Framework of Java Select the correct answer from above options...
asked Mar 1, 2022 in Education by JackTerrance
0 votes
Q: Explain Which of these methods is used to retrieve the elements in properties object at specific location?
    Which of these methods is used to retrieve the elements in properties object at specific location? (a) get() ... Framework of Java Select the correct answer from above options...
asked Mar 1, 2022 in Education by JackTerrance
0 votes
Q: Explain Which of these methods is used to notify observer the change in observed object?
    Which of these methods is used to notify observer the change in observed object? (a) update() (b) notify() ... Utility Classes of Java Select the correct answer from above options...
asked Feb 23, 2022 in Education by JackTerrance
0 votes
Q: Explain Which of these classes provide implementation of map interface?
    Which of these classes provide implementation of map interface? (a) ArrayList (b) HashMap (c) LinkedList (d) ... Framework of Java Select the correct answer from above options...
asked Mar 1, 2022 in Education by JackTerrance
0 votes
Q: Explain Which of these methods can convert an object into a List?
    Which of these methods can convert an object into a List? (a) SetList() (b) ConvertList() (c) ... Collections Framework of Java Select the correct answer from above options...
asked Mar 1, 2022 in Education by JackTerrance

© Copyright 2018-2023 www.Blogmepost.com. All rights reserved. Developed by Blogmepost.

...