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Difference between Hierarchical and Relational data model

1. Hierarchical Data Model : Hierarchical data model is the oldest type of data model. It was developed by IBM in 1968. It organizes data in… Read More

DBMS

Difference Between

GATE CS

Amazon Interview Experience- System Dev Intern

Written Test There were 30 MCQs based on DBMS, OS, output questions, OOP concepts. And there were 2 coding questions One simple question based… Read More

Amazon

Marketing

Experiences

Internship

Interview Experiences

Auto comment on a facebook post using JavaScript

In this article, we are going to learn how to comment automatically on a Facebook post. You can use this method to wish your friends… Read More

JavaScript-Questions

JavaScript

TechTips

Web Technologies

Python – Test if all Values are Same in Dictionary

Given a dictionary, test if all its values are the same. Input : test_dict = {"Gfg" : 8, "is" : 8, "Best" : 8} Output… Read More

Python dictionary-programs

Python

Python Programs

MongoDB $subtract Operator

MongoDB provides different types of arithmetic expression operators that are used in the aggregation pipeline stages and an $subtract operator is one of them. This… Read More

MongoDB-operators

MongoDB

How to Clone webpage Using pywebcopy in Python?

Sometimes we need a handy web page on your local hard drive. So, here we are going to write a simple Python script to Scrap… Read More

python-modules

python-utility

Python

Create a Python Script Notifying to take a break

We generally do not take breaks when we are using our laptop or PC. It might affect our eyesight as well as mind. So with… Read More

Python-projects

python-utility

Python

Basic Frame Structure of SDLC

Synchronous Data Link Control (SDLC) is generally linked layer protocol that is used with Systems Network Architecture (SNA) environment. SNA is proprietary networking architecture of… Read More

Computer Networks

turtle.mode() function in Python

The turtle module provides turtle graphics primitives, in both object-oriented and procedure-oriented ways. Because it uses Tkinter for the underlying graphics, it needs a version… Read More

Python-turtle

Python

DE Shaw Off-Campus Fresher Interview Experience

How I Applied? I applied through their careers page https://www.deshawindia.com/OpenPositions.shtml . I got to know about their recruiting through a friend. Then got an invitation for their… Read More

D-E-Shaw

DE Shaw

Marketing

Off-Campus

Experiences

Interview Experiences

Number of spanning trees of a weighted complete Graph

Prerequisites: Graph Theory Basics, Spanning tree. Complete Weighted Graph: A graph in which an edge connects each pair of graph vertices and each edge has… Read More

Graph Minimum Spanning Tree

Data Structures

DSA

Graph

Tree

Matrix operations using operator overloading

Pre-requisite: Operator OverloadingGiven two matrix mat1[][] and mat2[][] of NxN dimensions, the task is to perform Matrix Operations using Operator Overloading.Examples: Input: arr1[][] = {… Read More

Operator Overloading

C++

DSA

Matrix

Programming Language

How to use unordered_map efficiently in C++

Pre-requisite: unordered_set, unordered_map C++ provides std::unordered_set and std::unordered_map to be used as a hash set and hash map respectively. They perform insertion/deletion/access in constant average… Read More

cpp-unordered_map

C++

Minimum number of operations required to obtain a given Binary String

Given a binary strings S of length N, the task is to obtain S from a string, say T, of length N consisting only of… Read More

binary-string

Competitive Programming

DSA

Greedy

Mathematical

Searching

Strings

Basic Frame Structure of HDLC

High-Level Data Link Control (HDLC) generally uses term “frame” to indicate and represent an entity of data or a protocol of data unit often transmitted… Read More

Computer Networks

Count of pairs of Array elements which are divisible by K when concatenated

Given an array arr[] and an integer K, the task is to count the pair of indices (i, j) such that i !=j and concatenation… Read More

cpp-map

frequency-counting

Modular Arithmetic

number-digits

Arrays

DSA

Greedy

Hash

Mathematical

Sum of all differences between Maximum and Minimum of increasing Subarrays

Given an array arr[] consisting of N integers, the task is to find the sum of the differences between maximum and minimum element of all… Read More

subarray

Arrays

DSA

Mathematical

JavaScript TypeError – ‘X’ is not iterable

This JavaScript exception is not iterable occurs if the value present at the right-hand-side of for…of or as argument of a function such as Promise.all… Read More

JavaScript-Errors

JavaScript

Web Technologies

Rename specific column(s) in Pandas

Given a pandas Dataframe, let’s see how to rename specific column(s) names using various methods. First, let’s create a Dataframe: Python3 # import pandas package… Read More

Python pandas-dataFrame

Python Pandas-exercise

Python-pandas

Python

How to Create custom Turtle shapes in Python?

In Turtle, by default, we have an arrowhead-shaped cursor for drawing on the canvas. This can be changed to some other predefined shape or we… Read More

Python-turtle

Python