Question Discussion & Solution

MCQ

What is the time complexity improvement of skip lists from linked lists in insertion and deletion?

O(n) to O(logn) where n is number of elements

O(n) to O(1) where n is number of elements

no change

O(n) to O(n2) where n is number of elements

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MCQ

Linked list data structure usage offers considerable saving in

Space utilization

Computational time

Space utilization & computational time

None of the above

Discussion

MCQ

What is the output of following function for start pointing to first node of following linked list?
1->2->3->4->5->6

void fun(struct node* start)
{
  if(start == NULL)
    return;
  printf("%d ", start->data);

  if(start->next != NULL )
    fun(start->next->next);
  printf("%d ", start->data);
}

1 4 6 6 4 1

1 3 5 1 3 5

1 2 3 5

1 3 5 5 3 1

Discussion

MCQ

How does implicit free lists(garbage collection) works in adding memory to free list ?

whichever comes last will be added to free list

whichever comes first will be added to free list

certain blocks cannot be used if there are no pointers to them and hence they can be freed

makes a probabilistic guess

Discussion

MCQ

In doubly linked lists, traversal can be performed?

Only in forward direction

Only in reverse direction

In both directions

None of the above

Discussion

MCQ

The time required to delete a node x from a doubly linked list having n nodes is

O (n)

O (log n)

O (1)

O (n log n)

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Abstract data types

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Queues

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Binary Trees

B Trees

Heaps

Hash based structures

Graphs

Mixed

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