Java Interview Programs

A curated collection of frequently asked Java programming interview questions with clean, well-structured solutions. Covers the most common algorithmic patterns tested in technical interviews.

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📁 Programs

Program	Concept
Factorial.txt	Compute factorial of a number
Fibonacci series upto given range.txt	Generate Fibonacci sequence up to N
Prime number.txt	Check if a number is prime
Prime Factor.txt	Find all prime factors of a number
Palindrom number.txt	Check if a number is a palindrome
String palindrom.txt	Check if a string is a palindrome
Reverse.txt	Reverse a number or string
GCD.txt	Greatest Common Divisor using Euclidean algorithm
LCM.txt	Least Common Multiple
Sum of digits.txt	Sum all digits of a number
No.of digits.txt	Count digits in a number
Split number into digit.txt	Extract individual digits
Power of a number.txt	Compute power/exponentiation
Swap two numbers.txt	Swap values with and without temp variable
Even odd.txt	Determine even or odd

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🛠️ Language

Java — all solutions are written in Java.

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💡 Topics Covered

• Number theory — prime, factorial, GCD, LCM, power
• String manipulation — palindrome, reverse
• Digit operations — sum, count, split
• Series generation — Fibonacci
• Basic logic — swap, even/odd

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📌 Who Is This For?

Anyone preparing for Java technical interviews looking for quick reference solutions to the most commonly asked programming problems.