All Hard Articles

Trigonometric Functions of Sum and Difference of Two Angles

Trigonometry is a branch of mathematics, which deal with the angles, lengths, and heights of triangles and their relationships. It had played an important role… Read More

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Trigonometry & Height and Distances

Class 11

Mathematics

School Learning

Different Ways to Copy Files in Java

There are mainly 3 ways to copy files using java language. They are as given below: Using File Stream (Naive method)Using FileChannel ClassUsing Files class.… Read More

Java-Files

Picked

Java

Job Scope for Android Developers

Android is an open-source operating system based on Linux Kernel and used in smart devices like Android Phones, Watches, T.V., Tablets, etc. Android was developed… Read More

Android

GBlog

Enhanced Binary Exponential Backoff Algorithm for Fair Channel Access in Ad Hoc Networks

The Binary Exponential Backoff Algorithm prevents packet collisions during simultaneous access by randomizing moments at stations attempting to access the wireless channels. However, this randomization… Read More

C Language

C++ Programs

Computer Networks

Computer Subject

Amazon Interview Experience for SDE-II (Virtual Rounds)

I got a call from an Amazon recruiter as I was referred by one of my friends for the role. She sent me the coding… Read More

Amazon

Experiences

Interview Experiences

Getting value after button click with BeautifulSoup

The library, BeautifulSoup in Python apart from extracting data out of HTML or XML files, helps in searching, modifying, and navigating the parse tree. Are… Read More

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Python BeautifulSoup

Python bs4-Exercises

Python

Pizza Puzzle

Problem Statement: At a restaurant, pizzas can be ordered in boxes of 6, 9, and 20. What is the highest number of Pizzas that cannot… Read More

Analytical Mathematical Puzzles

Aptitude

Puzzles

Slowloris DDOS Attack Tool in Kali Linux

Slowloris is a free and Open source tool available on Github. We can perform a denial of service attack using this tool. It’s a framework… Read More

Kali-Linux

Linux-Tools

Linux-Unix

How to make CSS Animations ?

Animation is a way using which we can create the illusion of motion by placing still images one after another in a typical format. For… Read More

CSS-Properties

CSS-Questions

Picked

Web technologies

CSS

Web Technologies

How to define a key-pair generator field in HTML5 ?

The HTML <keygen> element can help generate a key material as part of an HTML form and submit the public key. This mechanism is intended… Read More

HTML-Questions

HTML-Tags

HTML5

Picked

Web technologies

HTML

Web Technologies

Equation of a Circle

Equation of a circle is the algebraic way to define a circle. It is the locus of the point which is at a constant distance… Read More

Circles

Geometry

Math-Concepts

Maths-Class-11

Maths-Formulas

Picked

Class 11

Mathematics

School Learning

Left rotate digits of node values of all levels of a Binary Tree in increasing order

Given a Binary Tree, the task is to modify the Tree by left rotating every node any number of times such that every level consists… Read More

tree-traversal

DSA

Greedy

Queue

Searching

Tree

Java Program to Implement Triply Linked List

Unlike arrays, linked list elements are not stored at a contiguous location; the elements are linked using pointers. In this post, methods to insert a… Read More

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DSA

Java

Java Programs

Linked List

Amazon Interview Experience for SDE-2

Recently I was interviewed by Amazon for SDE-2, here is my experience. Current Status: 3.5 YOE with the product-based company. Online Assessment: 105 minutes including… Read More

Amazon

Experiences

Interview Experiences

Queries to calculate sum of squares of ASCII values of characters of a substring with updates

Given a string S of length N and a 2D array of strings Q[][] consisting of M queries of the following type: Query(“U”, “I”, “X”):… Read More

array-range-queries

ASCII

Segment-Tree

Advanced Data Structure

Competitive Programming

DSA

Mathematical

Strings

Java Program to Find Independent Sets in a Graph By Graph Coloring

Independent sets are set of vertices or edges in which the pair of any two vertices or edges are not adjacent to each other. Assuming… Read More

Picked

DSA

Graph

Java

Java Programs

Tailwind CSS Screen Readers

This class accepts lots of value in tailwind CSS in which all the properties are covered in class form. This class is used to improving… Read More

Tailwind CSS

CSS

Web Technologies

Java Program to Implement Playfair Cipher Algorithm

Cipher is an algorithm for encryption and decryption. The cipher text is a process that applies to different types of algorithms to convert plain text… Read More

Java

Java Programs

Java Program to Rotate Matrix Elements

Matrix is simply a two-dimensional array. So the goal is to deal with fixed indices at which elements are present and to perform operations on… Read More

Java

Java Programs

Construct a Tree whose sum of nodes of all the root to leaf path is not divisible by the count of nodes in that path

Given an N-ary tree consisting of N nodes numbered from 1 to N rooted at node 1, the task is to assign values to each… Read More

Arrays

Data Structures

Trees

Advanced Data Structure

Algorithms

Competitive Programming

Data Structures

DSA

Graph

Mathematical

Technical Scripter

Tree