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Linked Lists Questions

NA
SHSTTON
73
Solv. Corr.
198
Solv. In. Corr.
271
Attempted
0 M:0 S
Avg. Time

31 / 48

Choose the correct option.

The nodes in a skip list may have many forward references. their number is determined


Aprobabilistically

Bsequentially

Crandomly

Dorthogonally

ENone of these

Answer: Option A

Explanation:

The number of forward references are determined probabilistically, that is why skip list is a probabilistic algorithm.

Workspace

NA
SHSTTON
108
Solv. Corr.
102
Solv. In. Corr.
210
Attempted
0 M:0 S
Avg. Time

32 / 48

Choose the correct option.

Consider the 2-level skip list


2-level-skip-linkedlist


How to access 38?


Atravel 20-30-35-38

Btravel 20-38

Ctravel 20-30-40-38

Dtravel 20-40-38

ENone of these

Answer: Option A

Explanation:

Let us call the nodes 20, 30, 40 as top lines and the nodes between them as normal lines. the advantage of skip lists is we can skip all the elements between the top line elements as required.

Workspace

NA
SHSTTON
146
Solv. Corr.
521
Solv. In. Corr.
667
Attempted
0 M:12 S
Avg. Time

33 / 48

Choose the correct option.

What datastructures can be used in implementing a free list?


Aonly linked list

Barrays

Conly linked list

Dtrees

ENone of these

Answer: Option C

Explanation:

Sort trees can also be used in impelementing free lists which remaincomplex.

Workspace

NA
SHSTTON
72
Solv. Corr.
107
Solv. In. Corr.
179
Attempted
0 M:0 S
Avg. Time

34 / 48

Choose the correct option.

What are different ways of implementing free lists and which is simple among them?


Abest fit, first fit, worst fit, simple-first fit

Bbest fit, first fit, worst fit, simple-worst fit

Cbest fit, first fit, worst fit, simple-best fit

Dbest fit simple-best fit

ENone of these

Answer: Option A

Explanation:

The‭ ‬simplest form of memory management system can be called as first-fit.‭ ‬a device or system maintains a single‭ ‬list of free memory locations.‭ ‬When request to memory is sent,‭ ‬the list is searched and the first block that is large enough is returned.

Workspace

NA
SHSTTON
40
Solv. Corr.
107
Solv. In. Corr.
147
Attempted
0 M:0 S
Avg. Time

35 / 48

What’s wrong with this code which returns xor of two nodes address ?

struct node* XOR (struct node *a, struct node *b)
{
return ((int) (a) ^ (int) (b)); //this logic is used to fill the nodes with address of a xor linked list
}


Anothing wrong. everything is fine

Bparameters are wrong

Ctype casting at return is missing

Dtotal logic is wrong

ENone of these

Answer: Option C

Explanation:

It must be typecasted– return (struct node*)((int) (a) (int) (b));

Workspace

NA
SHSTTON
125
Solv. Corr.
72
Solv. In. Corr.
197
Attempted
0 M:0 S
Avg. Time

36 / 48

Choose the correct option.

The self organizing list improves _____


Aaverage access time

Bdeletion

Cinsertion

Dbinary search

ENone of these

Answer: Option A

Explanation:

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

37 / 48

Choose the correct option.

Which of the following is not the rearranging method used to implement self-organizing lists?


Acount method

Bordering method

Cmove to front method

Dleast frequently used

ENone of these

Answer: Option D

Explanation:

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

38 / 48

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

ENone of these

Answer: Option B

Explanation:

XOR linked lists are used to reduce the memory by storing the XOR values of address instead of actual address in pointers.

Workspace

NA
SHSTTON
374
Solv. Corr.
305
Solv. In. Corr.
679
Attempted
0 M:11 S
Avg. Time

39 / 48

Choose the correct option.

Free lists are used in


Astatic memory allocation

Bcontagious allocations

Cdynamic memory allocation

Dare used for speeding up linked list operations

ENone of these

Answer: Option C

Explanation:

Their property is meant for dynamic allocations.

Workspace

NA
SHSTTON
105
Solv. Corr.
74
Solv. In. Corr.
179
Attempted
0 M:20 S
Avg. Time

40 / 48

Choose the correct option.

What are implicit and explicit implementations of freelists?


Agarbage collection and new or malloc operators respectively

Bimplicit implementation is not favored

Cnew or malloc and garbage collection respectively

Dexplicit implementation is not favored

ENone of these

Answer: Option A

Explanation:

Gc and new most widely known.

Workspace

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