All Hard Articles

EDA | Exploratory Data Analysis in Python

In Python, exploratory data analysis, or EDA, is a crucial step in the data analysis process that involves studying, exploring, and visualizing information to derive… Read More

AI-ML-DS With Python

Python-Data-Analysis

AI-ML-DS

Data Analysis

UGC-NET | UGC NET CS 2015 Jun – III | Question 36

The number of nodes of height h in any n – element heap is __________. (A) h (B) 2h (C) ceil(n/2h)/ (D) ceil(n/2h+1) Answer: (D)Explanation:Quiz… Read More

UGC-NET

AVI Networks Interview Experience

Round 1: It was the written test comprising of Aptitude, Technical questions on OS and Compunter Networks. Round 2: this is technical round. duration will… Read More

Experiences

Interview Experiences

Algorithm for Dynamic Time out timer Calculation

Prerequisite – Computer Network | TCP Timers Calculating Time out timer (TOT) at transport layer is tricky as propagation delay is not constant i.e. path… Read More

Computer Networks

GATE CS

Technical Scripter

Strassen’s Matrix Multiplication Algorithm | Implementation

The Strassen’s method of matrix multiplication is a typical divide and conquer algorithm. We have discussed Strassen’s Algorithm here. However, let’s get again on what’s… Read More

C++ Programs

DSA

Matrix

Draw a ellipse and a rectangle in Java Applet

Java applets are application that can be executed in web browsers or applet viewers . We can draw shapes on the Java applet. In this… Read More

java-applet

Java

Java Programs

Queries to find distance between two nodes of a Binary tree – O(logn) method

Given a binary tree, the task is to find the distance between two keys in a binary tree, no parent pointers are given. Distance between… Read More

Binary Tree

LCA

Advanced Data Structure

Competitive Programming

DSA

Hash

Mathematical

Tree

Amazon Interview Experience | Set 432 (For SDE-2)

This interview was for the SDE-2 position for logistic management department of amazon. I had applied for this job on naukari.com. Round 1: There was… Read More

Experiences

Interview Experiences

Word Wrap problem ( Space optimized solution )

Given a sequence of words, and a limit on the number of characters that can be put in one line (line width). Put line breaks… Read More

DSA

Dynamic Programming

Strings

ISRO | ISRO CS 2008 | Question 25

The logic operations of two combinational circuits in Figure-I and Figure-II are (A) entirely different (B) identical (C) complementary (D) dual Answer: (A) Explanation: The… Read More

ISRO

Informatica Interview Experience | Set 6

Round 1: This round was paper based test. It includes Data Structure, Algorithms, C output, Operating System, DBMS, Unix, Aptitude, Puzzles Tip : If you are preparing… Read More

Experiences

Interview Experiences

Ordering Class | Guava | Java

A comparator, with additional methods to support common operations. This is an “enriched” version of Comparator. The common ways to get an instance of Ordering… Read More

Misc

8085 program to find the sum of first n natural numbers

Problem – Write an assembly language program for calculating the sum of first n natural numbers using 8085 microprocessor. Example – Input : 04H Output… Read More

microprocessor

system-programming

Computer Organization & Architecture

Queries to find distance between two nodes of a Binary tree

Given a binary tree, the task is to find the distance between two keys in a binary tree, no parent pointers are given. The distance… Read More

Binary Tree

LCA

Advanced Data Structure

Competitive Programming

DSA

Dynamic Programming

Hash

Tree

Check for balanced parentheses in an expression | O(1) space

Given a string of length n having parentheses in it, your task is to find whether given string has balanced parentheses or not. Please note… Read More

Data Structures

DSA

Stack

Java Swing | JDialog with examples

JDialog is a part Java swing package. The main purpose of the dialog is to add components to it. JDialog can be customized according to… Read More

java-swing

Java

Programming Language

Amazon Interview Experience | Set 430 (For SDE2)

Round 1: Given an array and an operation -> foo(index, value), the value can be either 1 or -1, if foo(index, value) is called, it will… Read More

Experiences

Interview Experiences

Maximum adjacent difference in an array in its sorted form

Given an array arr[] of size N, find the maximum difference between its two consecutive elements in its sorted form. Examples: Input: N = 3,… Read More

Pigeonhole Principle

Arrays

DSA

Searching

Solve the Crossword Puzzle

A 10 x 10 Crossword grid is provided, along with a set of words (or names of places) which need to be filled into the… Read More

cpp-string

programming-puzzle

DSA

Matrix

Recursion

BigIntegerMath Class | Guava | Java

BigIntegerMath is used to perform mathematical operations on BigInteger values. Basic standalone math functions are divided into the classes IntMath, LongMath, DoubleMath, and BigIntegerMath based… Read More

Misc