Delve into the essence of Core Java, the cornerstone of robust software development. Master the fundamentals, object-oriented concepts, and essential features that pave the way for building powerful and scalable applications.
ByVed Maurya
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Java technical interviews focus heavily on problem-solving ability, core Java fundamentals, and clean coding practices.In this article, we will go through frequently asked Java coding questions in tech rounds, explaining each step clearly so beginners and experienced developers can both benefit. 1. Reverse a String Without Using reverse() 🔹 Problem…
ByVed Maurya
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Introduction The Stream API, introduced in Java 8, is one of the most important features for writing clean, functional, and readable code. Streams allow developers to process collections declaratively instead of using traditional loops.This article explains almost every important Stream API method, grouped logically, with clear examples—perfect for: What Is…
ByVed Maurya
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Java interview preparation should focus on core concepts like OOP principles (encapsulation, inheritance, polymorphism, abstraction), data types, control structures, exception handling, and collections. Understand JVM internals, memory management, garbage collection, and Java 8+ features like streams, lambdas, and functional interfaces. Be confident with multithreading, synchronization, and concurrency utilities. Master important…
ByVed Maurya
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In mathematics Fibonacci Sequence is the series of numbers as given below 0, 1, 1, 2, 3, 5, 8, 13, 21, 34, … The next number is found by adding up the two numbers before it: For Example : In above series 2 at index 4 is found by adding…
ByVed Maurya
Updated
In mathematics, the greatest common divisor (gcd) of two or more integers, which are not all zero, is the largest positive integer that divides each of the integers. The greatest common divisor (also known as greatest common factor, highest common divisor or highest common factor) of a set of numbers…
ByVed Maurya
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A string prefix is a character(s) at the beginning of a string. For Example: in apple, app or ap or apps etc are prefix Problem Find the common longest prefix for strings apple, apps and appster Approach Sort all the string in alphabetical order. Find the small string Loop through…
ByVed Maurya
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Reversing an array, number, string and word is very important for interview point of view for all level of expertise. Beginner and Experienced both are asked this question again and again in interview. I will explain each one by one with working code and running it as screenshot. Problem 1…
ByVed Maurya
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A number that can divide by own or one only. For Example: 13, can be dived by only 1 and 13 only. Other prime numbers are 2, 3, 5, 7 , 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47, 53, 59, 61, 67, 71, 73, … 947,…
ByVed Maurya
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We will draw half pyramids, inverted pyramids, full pyramids, inverted full pyramids, Pascal’s triangle, and Floyd’s triangle in Java Programming. Half Pyramid of * ** ** * ** * * ** * * * * Code Half Pyramid of Numbers 1 1 2 1 2 3 1 2 3 4…
ByVed Maurya
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As arraylist can contains duplicates element, so sometime there would be some requirement to remove the duplicate element from the list. For Example: { 10, 12, 23, 10, 2, 21, 78, 90, 12 } after removal it should like { 10, 12, 23, 2, 21, 78, 90 } We would…
ByVed Maurya
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Armstrong number is a number that is equal to the sum of cubes of its digits. For example 0, 1, 153, 370, 371 and 407 are the Armstrong numbers. let take an example of the armstrong number 153. Sum of the cube of each digit is equal to the same…
ByVed Maurya
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Find out each character in a word. For Example: In Programming each character count is p=1 a=1 r=2 g=2 i=1 m=2 n=1 o=1 Problem Write a java code that will print each character and their count. Code