All Hard Articles

Adcuratio Interview experience for Software Engineer Intern

There were two rounds of interviews. Both were technical. Round-1 (Technical): There were two algorithmic questions asked in this interview, and we can implement the… Read More

Adcuratio

Marketing

Experiences

Interview Experiences

Storage of String in Java

In Java, we know both Stack and Heap space are part of Java Virtual Machine (JVM). However, these memory spaces are used for different purposes.… Read More

Java-Strings

Java

Split Pandas Dataframe by Column Index

Pandas support two data structures for storing data the series (single column) and dataframe where values are stored in a 2D table (rows and columns).… Read More

Python pandas-dataFrame

Python Pandas-exercise

Python-pandas

Python

Python – All substrings Frequency in String

Given a String, extract all unique substrings with their frequency. Input : test_str = “ababa” Output : {‘a’: 3, ‘ab’: 2, ‘aba’: 2, ‘abab’: 1,… Read More

Python dictionary-programs

Python string-programs

Python

Python Programs

PostgreSQL – Connecting to the database using Python

PostgreSQL API for Python allows user to interact with the PostgreSQL database using the psycopg2 module. In this article we will look into the process… Read More

postgreSQL-administration

postgreSQL-managing-database

PostgreSQL

Python

Maximum sum of Bitwise XOR of all elements of two equal length subsets

Given an array arr[] of N integers, where N is an even number. The task is to divide the given N integers into two equal… Read More

Bitwise-XOR

subsequence

subset

Arrays

Bit Magic

Combinatorial

DSA

Dynamic Programming

Applications of Dijkstra’s shortest path algorithm

Dijkstra’s algorithm is one of the most popular algorithms for solving many single-source shortest path problems having non-negative edge weight in the graphs i.e., it… Read More

Algorithms-Graph Shortest Paths Quiz

Dijkstra

Picked

Algorithms

DSA

Graph

Count of replacements required to make the sum of all Pairs of given type from the Array equal

Given an integer array arr of length N and an integer K, the task is to find the number of array elements to be replaced… Read More

Binary Search

frequency-counting

Arrays

DSA

Mathematical

Searching

How to compute the cross product of two given vectors using NumPy?

Let’s see the program to compute the cross product of two given vectors using NumPy. For finding the cross product of two given vectors we… Read More

Python numpy-Mathematical Function

Python-numpy

Python

How to add one polynomial to another using NumPy in Python?

In this article, Let’s see how to add one polynomial to another. Two polynomials are given as input and the result is the addition of… Read More

Python numpy-Mathematical Function

Python-numpy

Python

Flatten a Matrix in Python using NumPy

Let’s discuss how to flatten a Matrix using NumPy in Python. By using ndarray.flatten() function we can flatten a matrix to one dimension in python.… Read More

Python numpy-arrayManipulation

Python-numpy

Python

Count of all possible ways to reach a target by a Knight

Given two integers N, M denoting N×M chessboard, the task is to count the number of ways a knight can reach (N, M) starting from… Read More

chessboard-problems

combinatorics

Combinatorial

DSA

Greedy

Mathematical

Pattern Searching

Finding Data Type of User Input using Regular Expression in Java

Given a string, the task is to find its corresponding datatype using regular expression in java. We can broadly classify all data types into following… Read More

java-regular-expression

Java

Java Programs

Node.js agent.createConnection() Method

The Node.js HTTP API is low-level so that it could support the HTTP applications. In order to access and use the HTTP server and client,… Read More

Node.js-HTTP-Module

Node.js-Methods

Node.js

Web Technologies

Find Day of Week using SimpleDateFormat class in Java

Given the day, month, and year, the task is to find the corresponding day of the week using SimpleDateFormat class in Java. Examples Input: 11-08-2020… Read More

Java-SimpleDateFormat

Java

Java Programs

Print the Vowels in the Order of their occurrence in the given Matrix

Given a character matrix arr[][] of dimensions 3 * N, consisting of three characters {#, *, . }, the task is to find the vowels(A,… Read More

interview-preparation

TCS-coding-questions

C++ Programs

DSA

Matrix

Pattern Searching

Searching

Strings

Count of Equilateral Triangles of unit length possible from a given Hexagon

Given an array S[] consisting of the lengths of the 6 sides of a Hexagon, the task is to calculate the number of equilateral triangles… Read More

triangle

Aptitude

CAT Quiz

DSA

Geometric

Mathematical

Misc

Puzzles

Commvault Interview Experience | On Campus Placement (SDE)

The entire placement procedure for Commvault took place in 4 rounds for which 1500+ students were shortlisted. In the beginning, they asked us to choose… Read More

CommVault

Marketing

On-Campus

Experiences

Interview Experiences

DE Shaw Interview Experience

VIT Vellore 2021 Batch , I recently got Placed in D.E. Shaw & Co. through an On Campus Drive. Here I am Sharing My complete… Read More

D-E-Shaw

DE Shaw

On-Campus

Experiences

Interview Experiences

Covariance and Contravariance in PHP

Covariance: In PHP, the return type of method which belongs to the child can be more specific compared to the return type of method of… Read More

PHP-basics

PHP-Misc

PHP

PHP Programs

Web Technologies