findElement by className in Selenium Java - Practice Problems & Coding Challenges

Challenge - 5 Problems

❓ Predict Output

intermediate

Output of findElement by className with multiple matches

What will be the output of the following Selenium Java code snippet when multiple elements share the same class name?

Selenium Java

WebDriver driver = new ChromeDriver();
driver.get("https://example.com");
WebElement element = driver.findElement(By.className("btn"));
System.out.println(element.getText());

A Throws NoSuchElementException if more than one element has class 'btn'

B Prints the text of the first element with class 'btn' on the page

C Throws InvalidSelectorException because className cannot be used with multiple elements

D Prints the text of all elements with class 'btn' concatenated

💡 Hint

Remember that findElement returns only the first matching element.

The findElement method returns the first WebElement matching the locator. Even if multiple elements share the class name, only the first is returned and its text printed.

❓ assertion

intermediate

Correct assertion for element found by className

Which assertion correctly verifies that the element found by className "header" is displayed on the page?

Selenium Java

WebElement header = driver.findElement(By.className("header"));

A assertNotNull(driver.findElement(By.className("header")));

B assertEquals(header.getText(), "header");

C assertTrue(header.isDisplayed());

D assertFalse(header.isEnabled());

💡 Hint

Check if the element is visible to the user.

The isDisplayed() method returns true if the element is visible. Using assertTrue with isDisplayed() confirms the element is shown on the page.

❓ locator

advanced

Identify invalid className locator usage

Which of the following className locators is invalid and will cause an error in Selenium Java?

A By.className("btn-primary")

B By.className("nav-item")

C By.className("header")

D By.className("btn primary")

💡 Hint

Class names with spaces are not valid for By.className locator.

The By.className locator accepts only a single class name without spaces. "btn primary" contains a space and will cause an InvalidSelectorException.

🔧 Debug

advanced

Debugging NoSuchElementException with className

Given the code below, why does it throw NoSuchElementException?

Selenium Java

WebElement menu = driver.findElement(By.className("menu-item"));

A The element with class 'menu-item' does not exist on the current page

B The driver was not initialized before calling findElement

C The className locator cannot find elements with hyphens in class names

D The findElement method requires an XPath locator, not className

💡 Hint

Check if the page contains the element with the specified class.

NoSuchElementException occurs when no element matches the locator. If the class 'menu-item' is not present on the page, this exception is thrown.

❓ framework

expert

Best practice for waiting for element by className

Which code snippet correctly waits up to 10 seconds for an element with className "submit-btn" to be visible before interacting with it?

A new WebDriverWait(driver, Duration.ofSeconds(10)).until(ExpectedConditions.visibilityOfElementLocated(By.className("submit-btn")));

B Thread.sleep(10000); driver.findElement(By.className("submit-btn"));

C driver.manage().timeouts().implicitlyWait(Duration.ofSeconds(10)); driver.findElement(By.className("submit-btn"));

D driver.findElement(By.className("submit-btn")).isDisplayed();

💡 Hint

Use explicit waits to wait for specific conditions.

Using WebDriverWait with ExpectedConditions.visibilityOfElementLocated waits up to 10 seconds for the element to be visible, avoiding timing issues.