ChromeOptions configuration in Selenium Java - Practice Problems & Coding Challenges

Challenge - 5 Problems

❓ Predict Output

intermediate

What is the output of this ChromeOptions configuration code?

Consider the following Java Selenium code snippet configuring ChromeOptions. What will be the value of options.toString() after execution?

Selenium Java

import org.openqa.selenium.chrome.ChromeOptions;

public class Test {
    public static void main(String[] args) {
        ChromeOptions options = new ChromeOptions();
        options.addArguments("--headless");
        options.addArguments("--disable-gpu");
        System.out.println(options.toString());
    }
}

A ChromeOptions: {args=[]}

B ChromeOptions: {args=[--headless, --disable-gpu]}

C ChromeOptions: {args=[--disable-gpu, --headless]}

D ChromeOptions: {args=[--headless]}

💡 Hint

The order of addArguments calls is preserved in the args list.

The ChromeOptions object stores arguments in the order they are added. Here, '--headless' is added first, then '--disable-gpu'. The toString method reflects this order.

❓ assertion

intermediate

Which assertion correctly verifies that ChromeOptions has the 'incognito' argument?

Given a ChromeOptions object options with arguments added, which assertion correctly checks that '--incognito' is present in the arguments list?

Selenium Java

import org.openqa.selenium.chrome.ChromeOptions;
import static org.junit.jupiter.api.Assertions.assertTrue;

ChromeOptions options = new ChromeOptions();
options.addArguments("--incognito");

A assertTrue(options.getArguments().contains("--incognito"));

B assertTrue(options.toString().equals("--incognito"));

C assertTrue(options.getArguments().equals("--incognito"));

D assertTrue(options.getArguments().indexOf("incognito") > 0);

💡 Hint

Check the type returned by getArguments() and how to verify presence of an element.

The getArguments() method returns a List. Using contains("--incognito") correctly checks if the argument is present. Other options either compare to a string or use incorrect methods.

🔧 Debug

advanced

Why does this ChromeOptions code cause a runtime error?

Examine the following code snippet. Why does it throw a NullPointerException at runtime?

Selenium Java

ChromeOptions options = null;
options.addArguments("--start-maximized");

A Because options is null and calling addArguments on null causes NullPointerException.

B Because addArguments does not accept string arguments.

C Because --start-maximized is not a valid Chrome argument.

D Because ChromeOptions must be initialized with a WebDriver instance.

💡 Hint

Check the initialization of the options variable before method call.

The variable options is null, so calling any method on it causes a NullPointerException. The other options are incorrect because addArguments accepts strings, the argument is valid, and ChromeOptions does not require WebDriver to initialize.

❓ framework

advanced

Which ChromeOptions configuration disables extensions and runs in headless mode?

Select the correct Java Selenium ChromeOptions code snippet that disables browser extensions and runs Chrome in headless mode.

A

ChromeOptions options = new ChromeOptions();
options.addArguments("--disable-extensions");
options.setHeadless(false);

B

ChromeOptions options = new ChromeOptions();
options.addArguments("--disable-extensions", "--headless");

C

ChromeOptions options = new ChromeOptions();
options.addArguments("headless", "disable-extensions");

D

ChromeOptions options = new ChromeOptions();
options.setHeadless(true);
options.addArguments("--disable-extensions");

💡 Hint

Use the setHeadless method to enable headless mode properly.

Option D correctly uses setHeadless(true) to enable headless mode and adds the argument to disable extensions. Option D incorrectly passes two arguments in one call (which is invalid), C misses the required '--' prefix, and D disables extensions but sets headless to false.

🧠 Conceptual

expert

What is the effect of adding '--remote-debugging-port=9222' in ChromeOptions?

In Selenium ChromeOptions, what does adding the argument '--remote-debugging-port=9222' do?

A It sets the ChromeDriver to listen on port 9222 for WebDriver commands.

B It disables all network connections except on port 9222.

C It enables remote debugging on port 9222, allowing external tools to connect to Chrome for debugging.

D It forces Chrome to use port 9222 for all HTTP requests.

💡 Hint

Think about what remote debugging means in browser context.

The '--remote-debugging-port=9222' argument opens a debugging port on Chrome that external tools like DevTools or other debuggers can connect to. It does not affect WebDriver commands or network restrictions.