findElement by className in Selenium Java - Cheat Sheet & Quick Revision

Recall & Review

beginner

What does findElement(By.className("className")) do in Selenium?

It finds the first web element on the page that has the specified CSS class name.

intermediate

Why should you avoid using findElement(By.className()) with multiple classes separated by spaces?

Because <code>By.className</code> accepts only a single class name, not multiple classes separated by spaces. Using multiple classes will cause an error.

beginner

How do you handle the situation if findElement(By.className()) does not find any matching element?

It throws a NoSuchElementException. You can handle it by using try-catch or by checking if elements exist before accessing.

beginner

Write a simple Java code snippet using Selenium to find an element by class name "button-primary" and click it.

WebElement button = driver.findElement(By.className("button-primary")); button.click();

intermediate

What is a better alternative locator if you want to find an element with multiple classes?

Use By.cssSelector with a CSS selector combining classes, e.g., By.cssSelector(".class1.class2").

What will happen if you use findElement(By.className("btn primary")) in Selenium?

A It throws an error because multiple classes are not allowed.

B It finds the element with class name 'btn primary' as a single class.

C It finds the element with both classes 'btn' and 'primary'.

D It returns null without error.

By.className accepts only a single class name without spaces. Using multiple classes separated by spaces causes an error.

Which Selenium method is best to find an element by a single CSS class?

A findElement(By.xpath())

B findElement(By.id())

C findElement(By.tagName())

D findElement(By.className())

By.className is designed to find elements by a single CSS class.

If findElement(By.className("menu")) finds multiple elements, which one is returned?

A All elements with class 'menu'.

B The first element with class 'menu'.

C A random element with class 'menu'.

D No element, it throws an exception.

findElement returns the first matching element found in the DOM.

What exception does Selenium throw if findElement(By.className()) finds no element?

A NoSuchElementException

B ElementNotVisibleException

C TimeoutException

D StaleElementReferenceException

NoSuchElementException is thrown when no matching element is found.

Which locator is better to find an element with multiple classes 'btn' and 'active'?

A By.className("btn active")

B By.tagName("btn active")

C By.cssSelector(".btn.active")

D By.id("btn active")

By.cssSelector with combined classes is the correct way to find elements with multiple classes.

Explain how to use findElement(By.className()) in Selenium and mention its limitations.

Think about how CSS classes work and Selenium's locator rules.

Describe how you would handle a situation where findElement(By.className()) does not find any element during test execution.

Consider exception handling best practices in Selenium.