Java के इंटरव्यू सवाल

// Define the class Main
public class Main {
	// Program entry point: the JVM starts running here
	public static void main(String[] args) {
		// Declare text and set it to "hello"
		String text = "hello";
		// Print a line to the console
		System.out.println(new StringBuilder(text).reverse());
	}
}

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// Define the class Main
public class Main {
	static boolean isPalindrome(String s) {
		return s.equals(new StringBuilder(s).reverse().toString());
	}
	// Program entry point: the JVM starts running here
	public static void main(String[] args) {
		// Print a line to the console
		System.out.println(isPalindrome("racecar"));
	}
}

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// Import java.util.HashSet so it can be used by its short name
import java.util.HashSet;
// Define the class Main
public class Main {
	// Program entry point: the JVM starts running here
	public static void main(String[] args) {
		// Declare nums and set it to {1, 2, 3, 2}
		int[] nums = {1, 2, 3, 2};
		// Create a new HashSet object and store it in seen
		HashSet<Integer> seen = new HashSet<>();
		for (int n : nums) {
			// Check whether !seen.add(n)
			if (!seen.add(n)) {
				// Print a line to the console
				System.out.println("Duplicate: " + n);
			}
		}
	}
}

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// Define the class Main
public class Main {
	// Program entry point: the JVM starts running here
	public static void main(String[] args) {
		// Loop: repeat while the condition holds
		for (int i = 1; i <= 15; i++) {
			if (i % 15 == 0) System.out.println("FizzBuzz");
			else if (i % 3 == 0) System.out.println("Fizz");
			else if (i % 5 == 0) System.out.println("Buzz");
			else System.out.println(i);
		}
	}
}

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// Import java.util.HashMap so it can be used by its short name
import java.util.HashMap;
// Define the class Main
public class Main {
	// Program entry point: the JVM starts running here
	public static void main(String[] args) {
		// Declare text and set it to "hello"
		String text = "hello";
		// Create a new HashMap object and store it in freq
		HashMap<Character, Integer> freq = new HashMap<>();
		for (char c : text.toCharArray()) {
			freq.merge(c, 1, Integer::sum);
		}
		// Print a line to the console
		System.out.println(freq);
	}
}

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