All Medium Articles

Number of unique paths in tree such that every path has a value greater than K

Given a tree as a set of edges such that every node has a unique value. We are also given a value k, the task… Read More

DFS

DSA

Tree

Designing Deterministic Finite Automata (Set 4)

Prerequisite: Designing finite automata , Designing Deterministic Finite Automata (Set 3) In this article, we will see some designing of Deterministic Finite Automata (DFA). Problem-1:… Read More

GATE CS

Theory of Computation

Pattern compile(String) method in Java with Examples

The compile(String) method of the Pattern class in Java is used to create a pattern from the regular expression passed as parameter to method. Whenever… Read More

Java 8

Java-Functions

Java-Pattern

Java

XOR of XORs of all sub-matrices

Given a ‘N*N’ matrix, the task is to find the XOR of XORs of all possible sub-matrices.Examples: Input :arr = {{3, 1}, {1, 3}} Output… Read More

Bitwise-XOR

Marketing

Algorithms

Bit Magic

DSA

Mathematical

Matrix

Find Nth positive number whose digital root is X

Given a number X ( 1<= X <= 9) and a positive number N, find the Nth positive number whose digital root is X.Digital Root:… Read More

Algorithms

C++ Programs

DSA

Mathematical

Python | Convert list of nested dictionary into Pandas dataframe

Given a list of the nested dictionary, write a Python program to create a Pandas dataframe using it. We can convert list of nested dictionary… Read More

pandas-dataframe-program

Python pandas-dataFrame

Python-nested-dictionary

Python-pandas

Python

Maximum length subarray with difference between adjacent elements as either 0 or 1

Given an array of n integers. The task is to find the maximum length of the sub-array such that absolute difference between all the consecutive… Read More

Java

School Programming

Reverse Level Order traversal in spiral form

Given a binary tree, the task is to print the reverse level order in spiral form. Examples: Input: 1 / \ 2 3 / \… Read More

Binary Tree

tree-level-order

Data Structures

DSA

Tree

Python – Create a dictionary using list with none values

Sometimes you might need to convert a list to dict object for some better and fast operation. Let’s see how to convert a list into… Read More

Python dictionary-programs

python-dict

Python

Python Programs

Microsoft Internship Interview Experience

I applied for Microsoft internship(TECH SET GO 2018) through mettl.com. There were few basic criteria to apply like min 7 cgpa, no backlogs..it was a… Read More

Experiences

Interview Experiences

Amazon Interview Experience (On-Campus for SDE-1) 2019

Amazon conducted a pool placement at our college in the month of feb 2019. We were shared the link for a test hosted on HackerEarth… Read More

Experiences

Interview Experiences

ML | Momentum-based Gradient Optimizer introduction

Gradient Descent is an optimization technique used in Machine Learning frameworks to train different models. The training process consists of an objective function (or the… Read More

Engineering Mathematics Questions

Python

ML | Stochastic Gradient Descent (SGD)

Gradient Descent is an iterative optimization process that searches for an objective function’s optimum value (Minimum/Maximum). It is one of the most used methods for… Read More

AI-ML-DS With Python

AI-ML-DS

Deep Learning

Machine Learning

XOR of a submatrix queries

Given an N * N matrix and q queries, each containing position of top-left and bottom-right corner of a rectangular sub-matrix, the task is to… Read More

matrix-range-queries

Algorithms

Bit Magic

DSA

Mathematical

Matrix

Python | Matplotlib Sub plotting using object oriented API

Plotting using Object Oriented(OO) API in matplotlib is an easy approach to plot graphs and other data visualization methods. The simple syntax to create the… Read More

AI-ML-DS With Python

Python-matplotlib

Python

Python Programs

Find whether only two parallel lines contain all coordinates points or not

Given an array that represents the y coordinates of a set of points on a coordinate plane, where (i, arr[i]) represent a single point. Find… Read More

DSA

Geometric

Mathematical

Longest sub-sequence of array containing Lucas numbers

Given an array arr[] of N elements, the task is to find the length of the longest sub-sequence in arr[] such that all the elements… Read More

Arrays

DSA

Hash

Mathematical

Find the number of solutions to the given equation

Given three integers A, B and C, the task is to find the count of values of X such that the following condition is satisfied, X… Read More

math

number-digits

DSA

Mathematical

Number of trailing zeroes in base 16 representation of N!

Given an integer N, the task is to find the number of trailing zeroes in the base 16 representation of the factorial of N. Examples: … Read More

factorial

Combinatorial

Competitive Programming

DSA

HTML Scientific Calculator

The HTML Scientific Calculator is a tool for performing advanced scientific calculations like finding exponents, logarithms, factorials, and more. This calculator comprises two sections: the… Read More

HTML-Questions

HTML

Web Technologies