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This lesson introduces the basic lambda expression structure with tips to write efficient code.

This is an introductory lesson on lambda expressions. You will learn about the lambda operator, expression, syntaxes and more!

This is an exercise problem for your practice. Try to come up with an approach and solve it by yourself. Good Luck!

Unary and Binary operators are the other two functional interfaces that most developers are interested in.

This lesson talks about the third functional interface, which is the BiFunction.

This lesson talks about the third functional interface, which is the Predicate.

This lesson talks about the third functional interface, which is the Function.

This lesson talks about the second functional interface, which is the Supplier.

This lesson talks about the first functional interface, which is the Consumer.

This lesson details about the various functional interfaces that fall under major 4 categories.

This is the introductory lesson on functional interfaces. Introduced in Java SE 8, these are powerful and most useful as either lambdas or method reference can use it.

In this lesson, you will learn how immutability is achieved through functional programming.

In this lesson, you will learn how immutability is achieved through functional programming.

This lesson details pure and impure functions with various examples for understanding.

Functional programming solves almost all of the business use cases OOP solves. In fact, functional programming reduces bugs due to its immutability in nature.

In this lesson, you will learn about functional programming and the fundamental differences between object-oriented and functional programming.

In this lesson, you will learn declarative programming and the steps to achieve it. You will also be introduced to some real-world use cases for easy understanding.

In this lesson, you will learn imperative programming and the steps to achieve it. You will also be introduced to some real-world use cases for easy understanding.

In this lesson, you will learn various programming paradigms in computer science.

Functional programming is a paradigm that treats computation as the evaluation of functions, avoiding shared mutable state and side effects. It is far older than Java — Lisp introduced these ideas in 1958 — but Java only gained first-class support for it in Java SE 8 (March 2014), when lambda expressions,

This course has taught you how to re-write arithmetic operators like +, -, /, * into left, right shift, and other bit-level operations. I hope the knowledge you gain in this course will be useful in solving Leetcode, Hackerrank, HackerEarth, Codeforces, Codechef, and other online coding challenges. It will also help you

In the kth bit set/unset problem, we first write the algorithm, then some pseudocode, and then implement the solution. In this lesson, we try to solve this algorithm using the left shift operator. Try solving it on your own. Solution review Imagine we check the right-most significant bit

This problem is similar to the last lesson we discussed. If you need a clue, return to the previous lesson to further your understanding. Introduction In this question, we need to find the first set-bit position from the right. Problem statement Given an input number, find the first set-

In the kth bit set/unset problem, we need to write a program that checks whether the kth bit of a number is 1 or 0. In this lesson, we try to find a bit in the binary representation of a number at the kth position and check if it

In the kth bit set/unset problem, we first write the algorithm, then some pseudocode, and then implement the solution. In this lesson, we try to solve this algorithm using the left shift operator. Try solving it on your own. Solution review Imagine we check the right-most significant bit

This problem is similar to the last lesson we discussed. If you need a clue, return to the previous lesson to further your understanding. Introduction In this question, we need to find the first set-bit position from the right. Problem statement Given an input number, find the first set-

Prepare for Maven interviews with 10 common questions and scenario-based answers. Learn about POM, lifecycles, dependencies, plugins, multi-module projects, and best practices for Java developers.

Discover the best practices for Apache Maven: update dependencies regularly, use <dependencyManagement> for version consistency, and minimize snapshot usage in production for stable builds.

Learn how to integrate Maven with CI/CD pipelines using Jenkins and GitHub Actions. Understand skipping tests with -DskipTests and deploying Maven artifacts to Nexus or Artifactory.

Learn Maven multi-module projects with examples. Understand parent POM vs child modules, aggregator vs inheritance, and see a complete multi-module setup for Java applications.

Learn how to use Maven profiles for environment-specific builds. Activate profiles by command-line, property, or OS, and see a practical dev vs prod build example.

Learn how to use Maven plugins like the Compiler Plugin, Surefire Plugin, and Shade Plugin. Configure Maven to compile code, run tests, and create fat JARs in Java projects.

Learn how to handle dependency conflicts in Maven. Use <dependencyManagement> for version consistency, override transitive dependencies, and analyze conflicts with mvn dependency:analyze.

Learn how to manage dependencies in Maven. Understand how to add dependencies in pom.xml, explore dependency scopes (compile, provided, runtime, test), and see how Maven resolves transitive dependencies.

Apache Maven is one of the most popular build automation and dependency management tools in the Java ecosystem. While Maven offers a wide range of commands, a handful of them are used daily by Java developers when building, testing, and managing projects. In this lesson, we’ll cover the most

When working with Apache Maven, every command you execute follows a predefined sequence of steps known as the build lifecycle. Understanding this lifecycle is essential for any Java developer who wants to build, test, and deploy applications efficiently. In this guide, we’ll explore: * Maven’s three standard lifecycles * The

Introduction Now that you understand Maven’s installation and project structure, it’s time to create your first Maven project. In this lesson, you’ll learn how to: * Create a Maven project using archetypes * Use the mvn archetype:generate command * Open your Maven project in IntelliJ IDEA or Eclipse By

Learn Maven's standard project structure and directory layout for Java development. Master src/main/java, src/test/java, resources folders, and target build outputs. Follow Maven conventions for better IDE compatibility, team collaboration, and automated builds.

Master Maven pom.xml: Learn GAV coordinates, dependencies, plugins, and build configuration. Complete guide to Project Object Model structure for Java developers. Essential Maven tutorial.

Learn how to install Apache Maven on Windows, macOS & Linux. Step-by-step guide covers downloading, setting JAVA_HOME/MAVEN_HOME environment variables & verifying installation with mvn -v command.

The logical right shift means shifting the bits to the right, and MSB(most significant bit) becomes 0. The arithmetic right shift means shifting the bits to the right, and MSB is the same as in the original number.

The left-shift operator causes the bits in shift-expression to be shifted to the left by the number of positions specified by additive-expression. The bit positions that have been vacated by the shift operation are zero-filled.

A bit shift is a Bitwise operation where the order of a series of bits is moved, either to the left or right, to efficiently perform a mathematical operation.

We solved the problem using lookup (hashtable), using the mathematical formula. Let's solve this more efficiently using bit-level operations with XOR and then optimize the solution.

In this article, we'll learn various ways to find the missing number in an array. We use a memoization approach, a mathematical approach, and the most optimized way using the XOR operator.

Single Number coding question, can be easily solved with XOR bitwise technique with linear time complexity.

In this lesson, every element appears twice except one element. We solve this using naive, and then we move to solve it more optimally using XOR operator.

Hamming distance talks about two integers where the bit positions where the corresponding bits are different.

In this question, input two numbers and detect if they have opposite signs. We solve using bitwise XOR operator

In this coding question, we find the odd-appearing element using bitwise xor. This algorithm is simple yet powerful.

In the kth bit set/unset problem, we need to write a program that checks whether the kth bit of a number is either 1 or 0. In this lesson, we try to find a bit in the binary representation of a number at the kth position and check if

In this lesson, we use the Left Shift operator to find the bit length of a number. Introduction In this question, we take input and find its bit length. Problem Statement Given an input, find its bit length. Input: 8 Output: 4 (1000) Input: 2 Output: 2 (10) Input: 7

Learn Apache Maven essentials for Java developers. Master automated dependency management, standardized project structure, and build lifecycle. Discover why Maven is the preferred build tool for enterprise Java projects with hands-on examples.

In this lesson, we use the XOR operator to swap the values of two inputs. Introduction In this question, input two numbers and swap them without using the swapping logic. Problem statement We need to write a program to swap two numbers. Input: a = 10, b = 121 Output: a = 121,

Introduction A Bitwise XOR is a binary operation that takes two-bit patterns of equal length and performs the logical exclusive OR operation on each corresponding bits pair. Each position’s result is 0 if both bits are 0 or if both bits are 1. Otherwise, the result is 1.

The Bitwise XOR operator is denoted by ^. When an XOR gate is given with 2 inputs, the corresponding outputs will be: If two input bits are different, the output is 1. In all other cases, it is 0. This is an introductory lesson on XOR. Introduction This operator is the

We make use of bit manipulation to solve this problem. using a NOT operator. In this coding question, we use the NOT operator to switch the sign of a number. Problem Statement We need to write a program to switch the sign of a number. Input: 10 Output: -10 Intuition

Bitwise NOT, takes the input number, considers its binary representation, and inverts every bit, which means the 0 bit becomes 1, and the 1 bit becomes 0. Introduction This article teaches us more about the NOT operator and how it will be used in computers. We also learn the 2&

The Bitwise NOT operator evaluates the binary representation of the value of a single input. If the bit contains 1, the output will be 0 for that bit location. If the bit contains 0, the output will be 1. Introduction This lesson introduces the tilde '~' character. This is