BudiBaduQuiziBadu

Linked List Searching and Pointer Techniques Quiz

Linked List
0 Passed
0% acceptance

A 30-question quiz covering searching in linked lists, the fast–slow pointer technique, and finding the middle node.

30 Questions
~60 minutes
1

Question 1

What is the time complexity of searching for a value in a singly linked list?

A
O(n)
B
O(1)
C
O(log n)
D
O(n log n)
2

Question 2

Which situation allows search to terminate early?

A
When the target value is found
B
When values are sorted
C
When the tail is reached once
D
When the list is circular
3

Question 3

What is required when searching by value?

A
Checking each node sequentially
B
Maintaining predecessor pointers
C
Reverse traversal
D
Random access to nodes
4

Question 4

What should a search function return if the value is not found?

A
An indication of failure (like null or -1)
B
The head node
C
The last visited node
D
A new default node
5

Question 5

Why can searching in a linked list be slower than searching in an array?

A
The lack of random indexing
B
Values are automatically sorted
C
Nodes reorder themselves
D
Linked lists store metadata
6

Question 6

If multiple nodes contain the same value, simple search usually returns:

A
The first matching node
B
The last matching node
C
All matching nodes
D
A count of duplicates
7

Question 7

What is the movement pattern of the fast pointer in the fast–slow pointer technique?

A
Two steps per iteration
B
One step per iteration
C
Three steps per iteration
D
Variable speed based on value
8

Question 8

Why must null checks be performed when using fast–slow pointers?

A
Fast may reach the end earlier
B
Slow may move too fast
C
Nodes become automatically reversed
D
Values get deleted during traversal
9

Question 9

In cycle detection, what condition indicates a cycle?

A
Fast and slow pointers eventually meet
B
Fast reaches the tail
C
Slow becomes null
D
Head changes automatically
10

Question 10

Why is the fast–slow method space efficient?

A
It requires only two pointers
B
It stores nodes in arrays
C
It deletes unused nodes
D
It compresses memory blocks
11

Question 11

Which pointer determines when the loop ends in middle-finding?

A
Fast pointer
B
Slow pointer
C
Tail pointer
D
Head pointer
12

Question 12

How many passes does the fast–slow technique require to find the middle?

A
One pass
B
Two passes
C
Depends on list size
D
It needs recursion
13

Question 13

In an odd-length list, where does the slow pointer end when fast reaches null?

A
Exactly at the middle node
B
At the last node
C
At the first node
D
Before the middle node always
14

Question 14

In an even-length list, where does the slow pointer end?

A
At the second of the two central nodes
B
At the first of the two central nodes
C
At the last node
D
At null always
15

Question 15

Why is the middle-finding technique efficient?

A
It does not require knowing the list length
B
It sorts the list first
C
It uses reverse traversal
D
It processes multiple lists at once
16

Question 16

What happens if the fast pointer moves three steps per iteration?

A
The slow pointer will no longer reach the correct middle
B
The traversal becomes impossible
C
The list becomes unsorted
D
The slow pointer moves faster automatically
17

Question 17

Which list property does the fast–slow pointer technique help identify besides the middle?

A
Existence of a cycle
B
Duplicate values
C
Sorted order
D
Node memory addresses
18

Question 18

What does slow pointer's pace represent in middle-finding?

A
Half the traversal progress compared to fast
B
The same speed as fast
C
Random movement
D
Length calculation
19

Question 19

What is required to safely advance the fast pointer two steps?

A
Checking fast and fast.next for null
B
Setting slow to null first
C
Ensuring sorted order
D
Removing duplicates
20

Question 20

How does the slow pointer move during middle-finding?

A
One step per iteration
B
Two steps per iteration
C
Variable based on value
D
It does not move
21

Question 21

What does this pattern represent?

plaintext
slow = slow.next
      fast = fast.next.next
A
Fast–slow pointer movement
B
Tail insertion
C
Node swapping
D
Head deletion
22

Question 22

Which node is the slow pointer pointing to in this diagram?

plaintext
[A] -> [B] -> [C] -> [D] -> [E]
                ^
               slow
A
B
B
A
C
C
D
D
23

Question 23

What is the termination condition for middle-finding?

plaintext
while fast != null and fast.next != null:
          slow = slow.next
          fast = fast.next.next
A
Fast becomes null or reaches end
B
Slow becomes null
C
Head changes
D
Values match
24

Question 24

What does this diagram show?

plaintext
[A] -> [B] -> [C] -> [D]
      slow: B   fast: C
A
An intermediate state of middle-finding
B
Tail deletion
C
Cycle creation
D
List reversal
25

Question 25

What search operation is this pseudocode performing?

plaintext
curr = head
      while curr != null:
          if curr.data == value:
              return curr
A
Linear search
B
Binary search
C
Skip list search
D
Middle-finding
26

Question 26

What is the role of slow here?

plaintext
while fast and fast.next:
          slow = slow.next
          fast = fast.next.next
      return slow
A
Returning the middle node
B
Returning the last node
C
Performing deletion
D
Counting nodes
27

Question 27

Why is the fast–slow method preferable over counting length first?

A
It avoids two separate passes
B
It sorts the list faster
C
It reduces space complexity dramatically
D
It deletes nodes automatically
28

Question 28

Which of the following may cause incorrect middle calculations?

A
Advancing fast without checking fast.next
B
Duplicate values
C
Large list size
D
Sorted or unsorted data
29

Question 29

Which action is required before performing any pointer technique?

A
Checking if the list is empty
B
Computing memory offsets
C
Sorting nodes in ascending order
D
Removing duplicate nodes
30

Question 30

What advantage does pointer-based middle-finding offer?

A
No need for stored length or secondary passes
B
It makes the list circular
C
It automatically detects duplicates
D
It converts the list to an array

Other Quiz Categories

JavaScript
47 quizzes
Basics
Variables & Data Types
Operators & Expressions
Rust
30 quizzes
Cargo and Project Setup
Variables and Mutability
Data Types
Python
29 quizzes
Introduction & Core Fundamentals
Data Types Overview
Type Casting
Golang
29 quizzes
Basics & Syntax
Data Types & Zero Values
Operators & Expressions
C++
26 quizzes
Basics
Variables & Data Types
Operators & Expression
Java
22 quizzes
Java Basics & JVM Fundamentals
Variables, Data Types & Type Casting
Operators & Expressions
Matlab
21 quizzes
Basics & Environment
Variables and Data Type
Arrays and Matric
TypeScript
19 quizzes
Introduction and Overview
Installation and Configuration
Basic Types and Type Annotations
SQL Database
15 quizzes
Foundations and Basics
Basic Query Selection
Filter, Sort, and Alias Essentials
PHP
15 quizzes
Syntax Building Blocks
Variable Naming
Data Types Overview

QUIZZES IN Linked List

1

Introduction

50

A 50-question quiz introducing linked list fundamentals, node structures, operations, complexity, variants, traversal logic, and conceptual behavior.

2

Node Structure and Pointer Fundamentals

40

A 40-question quiz covering how linked list nodes store data and pointers, node relationships, pointer manipulation, node diagrams, memory links, and conceptual pointer mechanics.

3

Singly Linked List

30

A 30-question quiz covering singly linked list fundamentals, node linking, traversal, insertion, deletion, and pointer behavior.

4

Doubly Linked List

30

A 30-question quiz exploring doubly linked list structure, node connections, pointer behavior, traversal, insertion, deletion, and edge cases.

5

Circular Linked List

30

A 30-question quiz covering circular linked list structure, node linking, traversal challenges, insertion, deletion, and behavior of circular pointer loops.

6

Doubly Circular Linked List

20

A 20-question quiz covering the structure and behavior of doubly circular linked lists, including bidirectional looping, pointer updates, insertion, deletion, and traversal logic.

7

Linked List Traversal

25

A 25-question quiz about traversal patterns in linked lists, covering forward traversal, backward traversal in DLLs, circular traversal control, stopping conditions, pointer movement, and loop detection.

8

Linked List Insertion Operations

30

A 30-question quiz covering insertion at the head, insertion at the tail, and insertion at a specific position in linked lists.

9

Linked List Deletion Operations

30

A 30-question quiz covering deletion at head, deletion at tail, deletion by value, and deletion by position in linked lists.

10

Linked List Searching and Pointer Techniques

30

A 30-question quiz covering searching in linked lists, the fast–slow pointer technique, and finding the middle node.

11

Palindrome Linked List

25

A 25-question quiz covering detection of palindrome linked lists using pointers, reversal, comparison, and traversal logic.