All Hard Articles

Maximize profit in buying and selling stocks with Rest condition

The price of a stock on each day is given in an array arr[] for N days, the task is to find the maximum profit… Read More

Analysis of Algorithms

Arrays

Data Structures

DSA

Express express.static() Function

The express.static() function is a built-in middleware function in Express. It serves static files and is based on serve-static. Syntax: express.static(root, [options]) Parameters: The root… Read More

Express.js

Node.js

Web Technologies

Maximum size subset with given sum using Backtracking

Given an array arr[] consisting of N integers and an integer K, the task is to find the length of the longest subsequence with a… Read More

interview-preparation

subsequence

subset

Arrays

Backtracking

C++

CS - Placements

DSA

Dynamic Programming

Recursion

Sorting

RFID Full Form

RFID or Radio Frequency Identification is an automatic identification method that uses wireless non-contact radio frequency waves in which data is digitally encoded in RFID… Read More

Computer Networks

Full Form

Find K for every Array element such that at least K prefixes are ≥ K

Given an array arr[] consisting of N non-negative integers, the task is to find an integer K for every index such that at least K… Read More

cpp-multiset

prefix

Red Black Tree

Arrays

Competitive Programming

DSA

Mathematical

Tree

Python – Convert Nested dictionary to Mapped Tuple

Sometimes, while working with Python dictionaries, we can have a problem in which we need to convert nested dictionaries to mapped tuple. This kind of… Read More

Python dictionary-programs

Python

Python Programs

IHS Markit Interview Experience | On-Campus Internship

Round 1: Online Round on AMCAT Platform The first round primarily consisted of Aptitude,Logical Reasoning,Verbal and Technical Multi Choice Questions.The Technical MCQs mostly contained OOPS,Data… Read More

IHS Markit

Marketing

On-Campus

Experiences

Internship

Interview Experiences

Features of Oracle Server

The Oracle Server is a relational database management system that provides an open, complete, and integrated approach to information management. An Oracle Server consists of… Read More

Oracle

DBMS

How to Publish Your Android App on Google Play Store?

Nowadays smartphones are among the most essential gadgets for users. Over 60% of people sleep with their phones by their side and check it first… Read More

android

GBlog

TechTips

Maximum sum by picking elements from two arrays in order | Set 2

Given two arrays A[] and B[], each of size N, and two integers X and Y denoting the maximum number of elements that can be… Read More

Arrays

Combinatorial

Competitive Programming

DSA

Dynamic Programming

Mathematical

Count of elements having odd number of divisors in index range [L, R] for Q queries

Given an array arr[] of N positive integers and the number of queries Q, each query contains two numbers L and R. The task is… Read More

array-range-queries

divisors

maths-perfect-square

prefix-sum

Algorithms

Arrays

DSA

Dynamic Programming

Mathematical

Count of groups among N people having only one leader in each group

Given N number of people, the task is to count the number of ways to form groups of size? N where, in each group, the… Read More

Permutation and Combination

Algorithms

Combinatorial

Divide and Conquer

DSA

Mathematical

Level order traversal in spiral form using stack and multimap

Given a binary tree of N nodes, the task is to print level order traversal in a spiral form. In spiral form, nodes at the… Read More

cpp-multimap

cpp-stack

spiral

Traversal

Algorithms

Competitive Programming

DSA

Recursion

Stack

Strings

Tree

What is Wallet Smart Contract?

Wallets are just like your bank account, through which we can receive money, send money, and can check the balance. Important terms:uint- unsigned integer.address- It… Read More

Solidity

How to get column and row names in DataFrame?

While analyzing the real datasets which are often very huge in size, we might need to get the rows or index names and columns names… Read More

Python pandas-dataFrame

Python-pandas

Python

Find number of pairs (x, y) in an Array such that x^y > y^x | Set 2

Given two arrays X[] and Y[] of positive integers, find the number of pairs such that x^y > y^x where x is an element from… Read More

frequency-counting

maths-power

Suffix

Algorithms

Arrays

DSA

Greedy

Mathematical

Searching

Visualizing representations of Outputs/Activations of each CNN layer

Convolutional neural networks are very powerful in image classification and recognition tasks. CNN models learn features of the training images with various filters applied at… Read More

Deep-Learning

Machine Learning

Python

Uber Interview Experience | Software Engineer 1

There were 4 rounds. Each of them was an elimination round. Round 1(Online test on Hackerrank platform – 90 mins): An easy Tree-based question. (straightforward… Read More

Marketing

Uber

Experiences

Interview Experiences

Min number of moves to traverse entire Matrix through connected cells with equal values

Given a matrix A[][] of dimension N*M, the task is to find the minimum number of moves required to traverse the entire matrix starting from… Read More

cpp-set

Traversal

Competitive Programming

DSA

Matrix

Searching

Random Forest Approach for Regression in R Programming

Random Forest approach is a supervised learning algorithm. It builds the multiple decision trees which are known as forest and glue them together to urge… Read More

Picked

R Machine-Learning

R regression

R Language