Removing a Character from a String
What method can be used to pick or remove any given character from a string? 2026 Update: String Removal and […]
String Manipulation
Algorithms, Dynamic Programming, String Manipulation
Find Longest Palindrome In A String
How will you find out the longest palindrome in a given string. 2026 Update: Longest Palindromic Substring — Expand Around
Bit Manipulation, Data Structures
Find The Depth of a Binary Tree
How will you find the depth of a binary tree? 2026 Update: Binary Tree Depth — DFS, BFS, and the
Bit Manipulation
Check If a Number is Power of Two
What code will you write to check if a number is power of two or not? 2026 Update: Powers of
Algorithms, Data Structures
Check if a Linked list is a Palindrome or Not
Write code that will check if a linked list is a palindrome or not. 2026 Update: Linked List Palindrome —
Data Structures
Write a program for producer-consumer problem
Write a program for producer-consumer problem. Use a blocking queue. 2026 Update: Producer-Consumer — From Semaphores to Modern Async Queues
Bit Manipulation, Data Structures
Serialize and Deserialize a Binary Tree
Write code to serialize and deserialize a given binary tree. 2026 Update: Serialize/Deserialize Binary Tree — Complete Implementation Serializing a
Coding Interview Questions
Compute X^Y For Floats and Negative Values
How will you compute x^y such that it will work for floats and negative values? 2026 Update: Power Function —
Algorithms, Data Structures
Reverse a doubly linked list
How can you reverse a double linked list? 2026 Update: Reversing a Doubly Linked List — Full Implementation Reversing a
Arrays, Data Structures
Sum Up a Pair in Array
Can you find a pair in array that will sum up to particular number? 2026 Update: Two Sum — The
Coding Interview Questions
paradox dragon
I met three dragons. One always tells the truth, other one always lies and the last one alternates between lie
Algorithms, Arrays, Data Structures
Right Rotate an array by k elements
An array of elements is given arr arr is of length n Right rotate array by k elements Time complexity
Coding Interview Questions
Can you forecast weather?
It is raining at midnight – will we have sunny weather in 72 hours? 2026 Update: Weather Forecasting — Machine
Coding Interview Questions
Half full
A half is a third of it. What is it? 2026 Update: The Half-Full Glass — Estimation and Fermi Problems
Coding Interview Questions
Upside down years
When was the last year that looked the same upside down? (1961) 2026 Update: Strobogrammatic Numbers — Rotation Invariant Digits