adplus-dvertising
frame-decoration

Question

Which of the following piece of code has the functionality of counting the number of elements in the list?
a)

public int length(Node head)
{
 int size = 0;
 Node cur = head;
 while(cur!=null)
 {
     size++;
     cur = cur.getNext();
 }
 return size;
}

b)

public int length(Node head)
{
        int size = 0;
 Node cur = head;
 while(cur!=null)
 {
     cur = cur.getNext();
     size++;
 }
 return size;
}

c)

public int length(Node head)
{
 int size = 0;
 Node cur = head;
 while(cur!=null)
 {
     size++;
     cur = cur.getNext();
 }
}

d)

public int length(Node head)
{
 int size = 0;
 Node cur = head;
 while(cur!=null)
 {
     size++;
     cur = cur.getNext().getNext();
 }
 return size;
}

a.

a

b.

b

c.

c

d.

d

Answer: (a).a

Engage with the Community - Add Your Comment

Confused About the Answer? Ask for Details Here.

Know the Explanation? Add it Here.

Q. Which of the following piece of code has the functionality of counting the number of elements in the list?

Similar Questions

Discover Related MCQs

Q. What differentiates a circular linked list from a normal linked list?

Q. What is the time complexity of searching for an element in a circular linked list?

Q. Which of the following application makes use of a circular linked list?

Q. Which of the following is false about a circular linked list?

Q. Consider a small circular linked list. How to detect the presence of cycles in this list effectively?

Q. What is a skip list?

Q. Skip lists are similar to which of the following datastructure?

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

Q. To which datastructure are skip lists similar to in terms of time complexities in worst and best cases?

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

Q. 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)

Q. How to maintain multi-level skip list properties when insertions and deletions are done?

Q. Is a skip list like balanced tree?

Q. What is indexed skip list?

Q. What is xor linked list ?

Q. What does a xor linked list have ?

Q. What does first and last nodes of a xor linked lists contain ? (let address of first and last be A and B)

Q. Disadvantages of xor lists

Q. What are the important properties of xor lists

Q. Which of the following statements are true ?
i) practical application of XOR linked lists are in environments with limited space requirements, such as embedded devices.

ii)xor lists are not suitable because most garbage collectors will fail to work properly with classes or structures that don’t contain literal pointers

iii)in order to calculate the address of the next node you need to remember the address of the previous node

iv)xor lists are much efficient than single, doubly linked lists and arrays