The self-organizing list rearranges the nodes based on the access probabilities of the nodes. So the required elements can be located efficiently. Therefore, self-organizing list is mainly used to improve the average access time.
Workspace
NA
SHSTTON
43
Solv. Corr.
138
Solv. In. Corr.
181
Attempted
0 M:0 S
Avg. Time
22 / 33
Choose the correct option.
Which of the following is not the rearranging method used to implement self-organizing lists?
Least frequently used is a buffer replacement policy, while other three are methods to reorder the nodes in the self-organizing lists based on their access probability.
Workspace
NA
SHSTTON
33
Solv. Corr.
132
Solv. In. Corr.
165
Attempted
0 M:0 S
Avg. Time
23 / 33
Choose the correct option.
Given 10,8,6,7,9
swap the above numbers such that finally you got 6,7,8,9,10
so now reverse 10
9,7,6,8,10
now reverse 9
8,6,7,9,10
7,6,8,9,10
6,7,8,9,10
at this point 6 is ahead so no more reversing can be done so stop.
To implement above algorithm which datastructure is better and why ?
Alinked list. because we can swap elements easily
Bxor linked list. because there is no overhead of pointers and so memory is saved
Carrays. because we can swap elements easily
Ddoubly linked list. because you can traverse back and forth
Are the below statements true about skiplists?
In a sorted set of elements skip lists can implement the below operations
I. given a element find closest element to the given value in the sorted set in O(logn) II. find the number of elements in the set whose values fall a given range in O(logn)
For example consider a 2 level skip list. the level-2 skip list can skip one node on a average and at some places may skip 2 nodes, depending on probabilities. this ensures O(logn).
Workspace
NA
SHSTTON
20
Solv. Corr.
127
Solv. In. Corr.
147
Attempted
0 M:0 S
Avg. Time
28 / 33
Choose the correct option.
What are the disadvantages in implementing buddy system algorithm for free lists ?
Ainternal fragmentation
Bwe no more have the hole lists in order of memory address, so it is difficult to detect if 2 holes remain adjacent in memory and shall be merged into one hole
In Move-To-front Method the element which is searched is moved to the head of the list. And if a node is searched even once, it is moved to the head of the list and given maximum priority even if it is not going to be accessed frequently in the future. Such a situation is referred to as over-rewarding.
Workspace
NA
SHSTTON
49
Solv. Corr.
130
Solv. In. Corr.
179
Attempted
0 M:0 S
Avg. Time
30 / 33
Choose the correct option.
Which of the following data structure is preferred to have lesser search time when the list size is small?
Self-organizing list is easy and simple to implement than search tree and it requires no additional space. So using self organizing list is preferred when list size is small.
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