Window management (maximize, size) in Selenium Java - Practice Problems & Coding Challenges

Challenge - 5 Problems

❓ Predict Output

intermediate

What is the output of this Selenium Java code snippet?

Consider the following Selenium WebDriver code that opens a browser window and maximizes it. What will be the output of the printed window size?

Selenium Java

WebDriver driver = new ChromeDriver();
driver.manage().window().maximize();
Dimension size = driver.manage().window().getSize();
System.out.println(size.getWidth() + "," + size.getHeight());
driver.quit();

A The default browser window size before maximizing, e.g., "800,600"

B The width and height of the screen resolution, e.g., "1920,1080"

C Throws a NullPointerException because size is null

D Prints "0,0" because the window size is not set

💡 Hint

Maximizing the window sets it to the full screen size.

When you call maximize(), the browser window expands to the full screen size. Therefore, getSize() returns the screen's width and height.

❓ assertion

intermediate

Which assertion correctly verifies the browser window is maximized?

You want to write a test assertion in Java using Selenium to check if the browser window is maximized. Which option correctly asserts this?

A assertNotNull(driver.manage().window().getSize());

B assertEquals(driver.manage().window().getSize(), new Dimension(1920, 1080));

C assertFalse(driver.manage().window().getSize().getWidth() < 800);

D assertTrue(driver.manage().window().getSize().getWidth() >= 1920);

💡 Hint

Maximized window width should be at least the screen width.

Option D checks that the window width is at least 1920 pixels, which is a reasonable screen width for maximized windows. Exact equality (B) may fail on different screens.

🔧 Debug

advanced

Why does this Selenium Java code fail to maximize the window?

Given the code below, the browser window does not maximize as expected. What is the most likely cause?

Selenium Java

WebDriver driver = new ChromeDriver();
driver.manage().window().setSize(new Dimension(1024, 768));
driver.manage().window().maximize();
// Window remains 1024x768 instead of maximizing

A The browser is running in headless mode which disables maximize()

B The ChromeDriver version does not support maximize() properly

C The maximize() method must be called before setSize() to work

D The maximize() call is ignored because setSize() was called before it

💡 Hint

Headless mode often disables window resizing features.

When running ChromeDriver in headless mode, maximize() does not work because there is no visible window to resize.

🧠 Conceptual

advanced

What is the difference between maximize() and setSize() in Selenium WebDriver?

Choose the option that best explains the difference between maximize() and setSize() methods for browser windows in Selenium.

A maximize() sets the window to full screen size; setSize() sets to specific dimensions

B maximize() sets a fixed size; setSize() maximizes the window

C Both methods do the same but maximize() is deprecated

D maximize() only works on Firefox; setSize() only works on Chrome

💡 Hint

Think about full screen vs custom size.

maximize() expands the window to full screen size, while setSize() sets the window to the exact width and height you specify.

❓ framework

expert

How to reliably test window maximize behavior across different screen resolutions?

You want to write a Selenium Java test that verifies the browser window maximizes correctly on any screen resolution. Which approach is best?

A Assert window size equals fixed values like 1920x1080 after maximize()

B Skip maximize() and only test setSize() with fixed dimensions

C Compare window size after maximize() to Toolkit.getDefaultToolkit().getScreenSize()

D Use maximize() and assert window size is greater than 800x600

💡 Hint

Screen size varies by device; get it dynamically.

Using Java's Toolkit to get the actual screen size allows you to compare the window size after maximize() dynamically, making the test reliable on any device.