
Linked List Quiz
Quiz
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Other
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University
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Practice Problem
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Hard
Niveditha N
Used 1+ times
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13 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the main difference between a singly linked list and a doubly linked list?
Singly linked list has two pointers per node; doubly linked list has one
Singly linked list has one pointer per node; doubly linked list has two
Both have one pointer per node
Both have two pointers per node
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
In a singly linked list, what does the 'Next' pointer of the last node point to?
The first node
NULL (or None)
The previous node
It points to itself
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which operation is easier to perform in a doubly linked list compared to a singly linked list?
Insert at the beginning
Traverse forward
Traverse backward
Find the middle element
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
In a doubly linked list, what happens when you delete a node?
You only need to update the next pointer of the previous node
You only need to update the previous pointer of the next node
You need to update both next pointer of previous node and previous pointer of next node
No pointers need updating
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the time complexity to insert a node at the beginning of a singly linked list?
O(1)
O(n)
O(log n)
O(n^2)
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What will be the output of the following Java code that traverses a singly linked list?
10 -> 20 -> 30 -> null
30 -> 20 -> 10 -> null
null -> 10 -> 20 -> 30
10 20 30 null
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What will be the output of this code that deletes the first node in a singly linked list?
1 2 3
2 3
3
Null pointer exception
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