All Hard Articles

Amazon Interview Experience | Set 428 (For SDE-2)

I was interviewed for customer returns team for Hyderabad campus. I had 1 year and 9 month experience at the time of getting interviewed. Less… Read More

Experiences

Interview Experiences

Prime Number of Set Bits in Binary Representation | Set 1

Given two integers ‘L’ and ‘R’, write a program to find the total numbers that are having prime number of set bits in their binary… Read More

binary-representation

Prime Number

sieve

Bit Magic

DSA

Mathematical

Salesforce Interview Experience – MTS | Set 4 (6.5 Years Experience)

Round 1: Design a File System. The interviewer was looking more for the data structures I would use, if I have to build my own… Read More

Experiences

Interview Experiences

Guava Library in Java

Google Guava is an open-source(a decentralized software-development model that encourages open collaboration) set of common libraries for Java, mainly developed by Google engineers. It helps… Read More

Java

PHP | Uploading File

Have you ever wondered how websites build their system of file uploading in PHP? Here we will come to know about the file uploading process.… Read More

PHP

Web Technologies

Maximum average sum partition of an array

Given an array, we partition a row of numbers A into at most K adjacent (non-empty) groups, then the score is the sum of the… Read More

Arrays

DSA

Java Swing | JTextArea

JTextArea is a part of java Swing package . It represents a multi line area that displays text. It is used to edit the text… Read More

java-swing

Java

Java Programs

Misc

Programming Language

Construct a Turing Machine for language L = {wwr | w ∈ {0, 1}}

Prerequisite – Turing Machine The language L = {wwr | w ∈ {0, 1}} represents a kind of language where you use only 2 character,… Read More

GATE CS

Theory of Computation

A single neuron neural network in Python

Neural networks are the core of deep learning, a field that has practical applications in many different areas. Today neural networks are used for image… Read More

Misc

Disjoint Set Union on trees | Set 2

Given a tree, and the cost of a subtree is defined as |S|*AND(S) where |S| is the size of the subtree and AND(S) is bitwise… Read More

DSA

Tree

Program to print Reverse Floyd’s triangle

Floyd’s triangle is a triangle with first natural numbers. Task is to print reverse of Floyd’s triangle.Examples: Input : 4 Output : 10 9 8… Read More

Basic Coding Problems

pattern-printing

Reverse

DSA

DNA Cryptography

Cryptography is the branch of science which deals with the encoding of information for the purpose of hiding messages. It plays a vital role in… Read More

cryptography

Genetic Algorithms

Computer Networks

Technical Scripter

ML | Handling Missing Values

Missing values are a common issue in machine learning. This occurs when a particular variable lacks data points, resulting in incomplete information and potentially harming… Read More

Data Science

ISRO | ISRO CS 2011 | Question 40

Consider the following pseudocode: x:=1; i:=1; while (x ≤ 500) begin x:=2x ; i:=i+1; end What is the value of i at the end of… Read More

ISRO

OYO Rooms Interview Experience | Set 10 (SDE-1)

Off-Campus hiring drive for SDE-1 Round 1: Two Coding Questions on Hackerrank ( 90 minutes ) https://www.hackerearth.com/practice/algorithms/string-algorithm/basics-of-string-manipulation/practice-problems/algorithm/decode-1-6eab2976/ Print a given matrix in spiral form Round… Read More

Misc

UGC-NET | UGC NET CS 2015 Dec – III | Question 21

what is the name of the below searching Algorithm? C++ int function(vector<int> arr,int x){ int n = arr.size(); if(n == 0) return -1; … Read More

UGC-NET

Image Compression using Huffman Coding

Huffman coding is one of the basic compression methods, that have proven useful in image and video compression standards. When applying Huffman encoding technique on… Read More

C Language

Parameters for Feature Selection

Prerequisite : Introduction to Dimensionality Reduction Dimensionality reduction is the process of reducing the number of random variables under consideration, by obtaining a set of… Read More

Computer Subject

Data Science

Machine Learning

Technical Scripter

UGC-NET | UGC NET CS 2015 Jun – II | Question 1

How many strings of 5 digits have the property that the sum of their digits is 7? (A) 66 (B) 330 (C) 495 (D) 99… Read More

UGC-NET

Exception Handling in PL/SQL

An exception is an error which disrupts the normal flow of program instructions. PL/SQL provides us the exception block which raises the exception thus helping… Read More

Technical Scripter