Accessing arguments in Java - Practice Problems & Coding Challenges

trophy

Challenge - 5 Problems

💻 code output

intermediate

What is the output of this Java program?

Consider the following Java program that accesses command-line arguments. What will it print when run with arguments: java Main Hello World?

Java

public class Main {
    public static void main(String[] args) {
        System.out.println(args[0] + " " + args[1]);
    }
}

A HelloWorld

B args[0] args[1]

C Hello World

D ArrayIndexOutOfBoundsException

💻 code output

intermediate

What happens if no arguments are passed?

What will be the output or result of running this Java program with no command-line arguments?

Java

public class Main {
    public static void main(String[] args) {
        System.out.println(args.length);
        System.out.println(args[0]);
    }
}

A 0 followed by null

B Compilation error

C 0 followed by 0

D 0 followed by ArrayIndexOutOfBoundsException

🔧 debug

advanced

Identify the error in accessing arguments

This Java program tries to print all command-line arguments but throws an error. What is the cause?

Java

public class Main {
    public static void main(String[] args) {
        for (int i = 1; i <= args.length; i++) {
            System.out.println(args[i]);
        }
    }
}

A ArrayIndexOutOfBoundsException because loop index goes out of bounds

B NullPointerException because args is null

C Compilation error due to wrong loop syntax

D No error, prints all arguments

📝 syntax

advanced

Which option correctly accesses the last argument?

Given a Java program with command-line arguments, which code snippet correctly prints the last argument?

A System.out.println(args[-1]);

B System.out.println(args[args.length - 1]);

C System.out.println(args[args.length + 1]);

D System.out.println(args[args.length]);

🚀 application

expert

What is the output of this program with arguments: java Main 5 10 15?

This Java program sums integer command-line arguments. What does it print when run with arguments 5 10 15?

Java

public class Main {
    public static void main(String[] args) {
        int sum = 0;
        for (String arg : args) {
            sum += Integer.parseInt(arg);
        }
        System.out.println(sum);
    }
}

A 30

B NumberFormatException

C Compilation error

D 51015