trophyChallenge - 5 Problems

🎖️

Command Line Arguments Mastery

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🧠 conceptual

intermediate

2:00remaining

Purpose of Command Line Arguments in Java

Why do programmers use command line arguments in Java programs?

ATo make the program run faster by skipping input prompts

BTo allow users to provide input values when starting the program without changing the code

CTo store program output in a file automatically

DTo prevent the program from running without internet connection

Attempts:

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💻 code output

intermediate

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Output of Java Program Using Command Line Arguments

What will be the output of this Java program if run with arguments hello and world?

Java

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

Aworld hello

Bargs[0] args[1]

Chello world

DArrayIndexOutOfBoundsException

Attempts:

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💻 code output

advanced

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Handling Missing Command Line Arguments

What will happen if you run this Java program without any command line arguments?

Java

public class ArgsCheck {
    public static void main(String[] args) {
        if (args.length == 0) {
            System.out.println("No arguments provided");
        } else {
            System.out.println("First argument: " + args[0]);
        }
    }
}

ANo arguments provided

BFirst argument: null

CArrayIndexOutOfBoundsException

DCompilation error

Attempts:

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🧠 conceptual

advanced

2:00remaining

Advantages of Using Command Line Arguments

Which of the following is NOT an advantage of using command line arguments in Java programs?

AThey help in testing programs with various input values easily

BThey enable automation by running programs with preset inputs

CThey allow programs to accept different inputs without code changes

DThey improve program security by encrypting inputs automatically

Attempts:

2 left

🚀 application

expert

2:00remaining

Predict Output with Mixed Command Line Arguments

What will be the output when running this Java program with arguments 5 and 3?

Java

public class SumArgs {
    public static void main(String[] args) {
        int a = Integer.parseInt(args[0]);
        int b = Integer.parseInt(args[1]);
        System.out.println("Sum: " + (a + b));
    }
}

ASum: 8

BArrayIndexOutOfBoundsException

CNumberFormatException

DSum: 53

Attempts:

2 left