GATE CSE
First time here? Checkout the FAQ!
x
0 votes
209 views
Which of the following statement is/are correct?

1. If we use only Front pointer in queue, then insertion takes O(n) time while deletion in O(1) time.

2. If we use only Rear pointer in queue, then insertion is O(1) and deletion is not possible.
asked in DS by Loyal (2.5k points)   | 209 views
Tushar.... What type of Data structure you are assuming in thus scenario?
it should be linked list

1 Answer

0 votes

What u are talking about is not implemented in simple queue.

so both are false.

1..If we use only Front pointer in queue, then insertion takes O(n) time while deletion in O(1) time.  flase.

Deletion in O(1) time thats ok but if 1st element insert then u can delete second in O(1) time.

2..If we use only Rear pointer in queue, then insertion is O(1) and deletion is not possible.

insertion not possible b/c u can go in left direction in simple queue.

 

answered by Veteran (44.2k points)  
Members at the site
Top Users Feb 2017
  1. Arjun

    4672 Points

  2. Bikram

    4004 Points

  3. Habibkhan

    3738 Points

  4. Aboveallplayer

    2966 Points

  5. sriv_shubham

    2278 Points

  6. Smriti012

    2212 Points

  7. Arnabi

    1814 Points

  8. Debashish Deka

    1788 Points

  9. sh!va

    1444 Points

  10. mcjoshi

    1444 Points

Monthly Topper: Rs. 500 gift card

20,788 questions
25,938 answers
59,531 comments
21,923 users