All Hard Articles

SquadStack Interview Experience for Product Engineer

I applied through SquadStacks’s job portal. And got a link for the first round in about 5 days. They took 5 rounds in total. Due… Read More

SquadStack

Experiences

Interview Experiences

Queries to count minimum flips required to fill a binary submatrix with 0s only

Given a binary matrix mat[][] of size M * N and Q queries of the form {pi, pj, qi, qj}, the task for each query… Read More

array-rearrange

prefix

prefix-sum

submatrix

DSA

Mathematical

Matrix

Count ways to split array into two equal sum subarrays by changing sign of any one array element

Given an array arr[] consisting of N integers, the task is to count ways to split array into two subarrays of equal sum by changing… Read More

frequency-counting

partition

prefix

prefix-sum

subarray

Suffix

suffix-sum

Arrays

DSA

Greedy

Mathematical

Searching

Amazon Interview Experience for SDE-1

I got this opportunity during the COVID time and hence all the interview rounds were conducted on Amazon Chime (video call) and I had to… Read More

Amazon

Experiences

Interview Experiences

Minimize given flips required to reduce N to 0

Given an integer N, the task is to reduce the value of N to 0 by performing the following operations minimum number of times: Flip… Read More

maths-power

setBitCount

Bit Magic

DSA

Dynamic Programming

Mathematical

Recursion

Replace even-indexed characters of minimum number of substrings to convert a string to another

Given two strings, str1 and str2 of length N, the task is to convert the string str1 to string str2 by selecting a substring and… Read More

substring

DSA

Searching

Strings

Program to find the Nth natural number with exactly two bits set | Set 2

Given an integer N, the task is to find the Nth natural number with exactly two set bits. Examples: Input: N = 4Output: 9Explanation: Numbers… Read More

setBitCount

Algorithms

Bit Magic

DSA

Mathematical

Searching

Print all possible K-length subsequences of first N natural numbers with sum N

Given two positive integers N and K, the task is to print all possible K-length subsequences from first N natural numbers whose sum of elements… Read More

subsequence

Backtracking

DSA

Mathematical

Data Visualization with Python Seaborn

Data Visualization is the presentation of data in pictorial format. It is extremely important for Data Analysis, primarily because of the fantastic ecosystem of data-centric… Read More

AI-ML-DS With Python

Python Data Visualization

Python-pandas

Python-Seaborn

Technical Scripter 2020

AI-ML-DS

Data Visualization

Technical Scripter

How to Add Outline or Edge Color to Histogram in Seaborn?

Seaborn is an amazing visualization library for statistical graphics plotting in Python. It provides beautiful default styles and color palettes to make statistical plots more… Read More

Python-Seaborn

Technical Scripter 2020

Python

Technical Scripter

Class Loading and Static Blocks Execution Using Static Modifier in Java

Static is a keyword which when attached to the method, variable, Block makes it Class method, class variable, and class Block. You can call a… Read More

Picked

Static Keyword

Technical Scripter 2020

Java

Technical Scripter

How to Generate a Random Directed Acyclic Graph for a Given Number of Edges in Java?

A Directed Acyclic Graph is a directed graph with no directed cycles. In a directed graph, the edges are connected so that each edge only… Read More

Picked

Java

Java Programs

Types of Functions

Functions are defined as the relations which give a particular output for a particular input value. A function has a domain and codomain (range). f(x)… Read More

Maths-Class-12

Relations and Functions

Class 12

Mathematics

School Learning

Flutter – BoxConstraints Widget

BoxConstraints is a built-in widget in flutter SDK. Its functionality is to add sized constraints on its child widget. It is usually taken as the… Read More

Flutter-widgets

Android

Dart

Flutter

Flutter – Banner Widget

Banner widget comes built-in with flutter API. It is somewhat similar to the debug banner that we are used to seeing on the top-right corner… Read More

Flutter-widgets

Android

Dart

Flutter

How to detect if a specific key pressed using Python?

In this article, we will learn how can we detect if a specific key is pressed by the user or not. The whole Module is… Read More

python-utility

Python

Top Online Courses to Learn Data Science with Certifications

Data Science is a big deal these days! So it stands to reason that you might want to learn it because of its amazing potential… Read More

data-science

GBlog

YouTube Automation using UIPath

In this article, we are going to learn how we can automatically play the most viewed video of an artist given by the user using… Read More

Misc

Check the Dependencies of a Table in SQL Server

As a SQL DBA, you might need to find the Dependencies of a Table in SQL Server using SQL Server Management Studio or SQL Query.… Read More

DBMS-SQL

SQL-Server

SQL

Class 11 NCERT Solutions – Chapter 1 Sets – Exercise 1.5

Question 1. Let U = {1, 2, 3, 4, 5, 6, 7, 8, 9}, A = {1, 2, 3, 4}, B = {2, 4, 6,… Read More

NCERT Solutions Class-11

Picked

Technical Scripter 2020

Class 11

Mathematics

NCERT

School Learning

Technical Scripter