Hey everyone,

I’m currently learning Python because my main goal is to get into AI Engineering. However, with campus placements coming up, I know I need to focus heavily on DSA and problem-solving to clear the coding rounds.

I’m stuck on one major decision and want some real-world advice from people who have been through placements:

• Option 1: Stick to Python for both DSA and AI Engineering so I only have to focus on one language.

• Option 2: Learn Java specifically for DSA (since many say it builds stronger fundamentals and is preferred in campus placements) while keeping Python strictly for AI/ML.

For those working in AI/ML or who recently sat for placements, is doing DSA in Python completely fine for online assessments and interviews? Or is learning Java for DSA actually worth the extra effort?

Would love to hear your honest thoughts and experiences

Turn real backend problems into coding exercises. Write a reference solution and tests for each one, including edge cases. The role is remote, around 15 flexible hours a week. Experience building Java APIs or services is a good fit.

Interested? Email [email protected] with “Backend Java” in the subject and a sentence about a Java service you built and how you tested it.

I know this is most asked question but I'm 4th year btech and I want to start dsa and confused to start with which program .

Some saying u can write complex topics code easily in python and others are saying java give job opportunities more .

“This package must not depend on persistence” is more useful as a failing test than a review reminder.

I work on ArchUnitJava. Version 1.0 is published on Maven Central:

`io.github.tristankruse:archunitjava:1.0.0`.

- Reads class directories and JARs without initializing the target classes.

- Checks dependency and cycle policies, with structured evidence behind failures.

- Runs through JUnit and can emit JSON, SARIF or JUnit XML for CI.

It requires DK 25 to run; compile the target before analyzing it. This is an independently

implemented project, not the original ArchUnit, not affiliated with it, and not a drop-in replacement.

[Source, quickstart and release record](https://github.com/dragonsec-ai/ArchUnitJava)

Writing assisted by AI.

so currently I am trying to learn java and I'm trying to encase everything in a do while loop. but then when I try to do so, it throws an error 'while' expected. Even though I have put in a "while" condition I've put the "do" code in curly brackets. but then when I go to type in the do condition it throws a code at me!? I have no clue what I'm doing wrong!

Not to mention, it keeps telling me my "continue" statement is outside of a loop. The compiler knows both curly brackets for the "do while" loop are valid but it still thinks that the "do" statement is missing a "while" condition.

import java.util.Random;
import java.util.Scanner;

public class main {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.
in
);
        Random random = new Random();
        String[] choices = {"rock", "paper", "scissors",
                "rock", "paper", "scissors",
                "rock", "paper", "scissors", "gun"};
        String playerChoice;
        String computerChoice;
        String playAgain = "yes";
        int misFire = random.nextInt();
        do() {
            System.
out
.print("Enter your move:");
            playerChoice = scanner.nextLine().toLowerCase();
            if (!playerChoice.equals("rock") &&
                    !playerChoice.equals("paper") &&
                    !playerChoice.equals("scissors") &&
                    !playerChoice.equals("gun")) {
                System.
out
.println("invalid Choice");
                continue;
            }
            computerChoice = choices[random.nextInt(10)];
            System.
out
.println(computerChoice);
            if (playerChoice.equals(computerChoice)) {
                System.
out
.println("It's a tie");
                //player wins
            } else if (playerChoice.equals("rock") && computerChoice.equals("scissors")) {
                System.
out
.println("You Win!");
            } else if (playerChoice.equals("scissors") && computerChoice.equals("paper")) {
                System.
out
.println("You Win!");
            } else if (playerChoice.equals("paper") && computerChoice.equals("rock")) {
                System.
out
.println("You Win!");
                // computer wins
            } else if (computerChoice.equals("rock") && playerChoice.equals("scissors")) {
                System.
out
.println("You. Get. Nothing. You lose, good day sir!");
            } else if (computerChoice.equals("scissors") && playerChoice.equals("paper")) {
                System.
out
.println("You. Get. Nothing. You lose, good day sir!");
            } else if (computerChoice.equals("paper") && playerChoice.equals("rock")) {
                System.
out
.println("You. Get. Nothing. You lose, good day sir!");
                //gun
            } else if (playerChoice.equals("gun") && misFire == 3) {
                System.
out
.println("You Win!");
            } else if (computerChoice.equals("gun") && misFire == 3) {
                System.
out
.println("You. Get. Nothing. You lose, good day sir!");
            } else if (computerChoice.equals("gun") && misFire <= 0 || misFire >= 4) {
                System.
out
.println("You Win!");
            } else if (playerChoice.equals("gun") && misFire <= 0 || misFire >= 4) {
                System.
out
.println("You. Get. Nothing. You lose, good day sir!");
            }
        }while (playAgain.equals("yes"))
        scanner.close();
    }
}

This is the program. I built it off of a couple for loops and some array tinkering Although, it is working properly, I'd like to be able to type the suit of the card along with the number. AI has helped me a little bit, but the idea of how the cards are displayed in the array is my idea.

import java.util.Scanner;
import java.util.ArrayList;
import java.util.Collections;

public class Main {
public static void main(String[] args) {

Scanner scanner = new Scanner(System.in);

// creation of the deck

ArrayList<String> deck = new ArrayList<>();

String[] suits = {"Hearts", "Diamonds", "Clubs", "Spades"};
String[] ranks = {
"A", "2", "3", "4", "5", "6", "7", "8", "9", "10", "J", "Q", "K"
};

//Generation of the 52 cards

for (int i = 0; i < suits.length; i++) {
for (int j = 0; j < ranks.length; j++) {
deck.add(ranks[j] + " of " + suits[i]);

}
}

// Shuffle the deck

Collections.shuffle(deck);

// creaation of the card grid

//2D array

String[][] cards = new String[3][3];
String table[][] = {

{"?", "?", "?"},
{"?", "?", "?"},
{"?", "?", "?"}};
boolean[][] drawn = new boolean[3][3];

// Place 9 random cards into the grid
int cardIndex = 0;

for (int i = 0; i < 3; i++) {
for (int j = 0; j < 3; j++) {
cards[i][j] = deck.get(cardIndex);
cardIndex++;

}
}
int totalDraws = 0;
System.out.print("=== DRAW A CARD GAME ===");

// Game Loop
while (totalDraws < 9) {
System.out.println("\nYour card table:");

//Display the table\
for (int i = 0; i < 3; i++) {
for (int j = 0; j < 3; j++) {
System.out.print(table[i][j] + "\t");
}
System.out.println();
}
System.out.print("\nChoose a card (1-9 and put the suit)");

int choice = scanner.nextInt();

// Validate choice

if (choice < 1 || choice > 9) {
System.out.println("Choose a number between 1 nd 9!");
}
// Convert choice into row and column

int row = (choice - 1) / 3;
int column = (choice - 1) % 3;

// Check if card was already drawn

if (drawn[row][column]) {
System.out.println("You already drew that card!");
continue;
}
// Reveal the card
table[row][column] = cards[row][column];

drawn[row][column] = true;

totalDraws++;

System.out.println("You drew: " + cards[row][column]);
}
System.out.println("\n===== Game Over ======");
System.out.println(("You drew all 9 cards"));

scanner.close();
}
}

Original code looks a little bit like this; there was some more to it, but that's the jist of it.

import java.util.Scanner;

public class Main {

    public static void main(String[] args) {

        String[][] twoDarray = {
                {"x", "x", "x"},
                {"x", "x", "x"},
                {"x", "x", "x"}
        };

        Scanner scanner = new Scanner(System.
in
);

        System.
out
.print("Enter something: ");
        String userinput = scanner.nextLine();

        twoDarray[0][0] = userinput;

        for (int i = 0; i < 3; i++) {
            for (int j = 0; j < 3; j++) {
                System.
out
.print(twoDarray[i][j] + "  ");
            }

            System.
out
.println();
        }

        scanner.close();
    }
}

Tell the tips guys, it helps me.

love.java

what aspects lack in the code?