Find element by class name in Selenium Python - Practice Problems & Coding Challenges

Challenge - 5 Problems

❓ locator

intermediate

Identify the correct Selenium locator for class name

Which of the following Selenium Python code snippets correctly finds an element by its class name btn-primary?

A driver.find_element(By.CLASS_NAME, "btn-primary")

B driver.find_element(By.CLASS, "btn-primary")

C driver.find_element_by_class_name("btn-primary")

D driver.find_element(By.CSS_SELECTOR, ".btn-primary")

💡 Hint

Use the modern Selenium syntax with By.CLASS_NAME for class selectors.

Option A uses the correct modern Selenium syntax with By.CLASS_NAME. Option A uses an invalid locator type 'By.CLASS'. Option A uses deprecated syntax no longer supported in Selenium 4+. Option A uses CSS selector which works but is not the direct class name locator.

❓ Predict Output

intermediate

Output of Selenium find_element by class name with multiple matches

Given the HTML below, what will driver.find_element(By.CLASS_NAME, "item") return?

Selenium Python

<div class="item">First</div>
<div class="item">Second</div>
<div class="item">Third</div>

A The last <div> element with class 'item' containing text 'Third'

B A list of all three <div> elements with class 'item'

C An error because multiple elements have the same class

D The first <div> element with class 'item' containing text 'First'

💡 Hint

find_element returns only one element, not a list.

find_element returns the first matching element found in the DOM. To get all matching elements, find_elements should be used.

❓ assertion

advanced

Correct assertion to verify element text found by class name

You found an element by class name message. Which assertion correctly verifies its text is exactly Success?

Selenium Python

element = driver.find_element(By.CLASS_NAME, "message")
text = element.text

A assert text.equals("Success")

B assert text == "Success"

C assert text.contains("Success")

D assert text is "Success"

💡 Hint

Use Python's equality operator to compare strings.

Option B correctly uses Python's equality operator '==' to compare strings. Option B is invalid syntax. Option B uses 'is' which checks identity, not equality. Option B uses a method not available on Python strings.

🔧 Debug

advanced

Identify the error in Selenium code using class name locator

What error will this code raise?

element = driver.find_element(By.CLASS_NAME, "btn primary")

Selenium Python

from selenium.webdriver.common.by import By

# Attempt to find element by class name with space
element = driver.find_element(By.CLASS_NAME, "btn primary")

A SyntaxError

B NoSuchElementException

C selenium.common.exceptions.InvalidSelectorException

D TypeError

💡 Hint

Class name locators cannot contain spaces because they represent a single class.

Using a class name with spaces is invalid because class names cannot contain spaces. Selenium raises InvalidSelectorException for this.

❓ framework

expert

Best practice for waiting for element by class name in Selenium

Which code snippet correctly waits up to 10 seconds for an element with class name loading-complete to appear before proceeding?

A WebDriverWait(driver, 10).until(EC.presence_of_element_located((By.CLASS_NAME, "loading-complete")))

B

time.sleep(10)
driver.find_element(By.CLASS_NAME, "loading-complete")

C driver.find_element(By.CLASS_NAME, "loading-complete") # No wait

D

driver.implicitly_wait(10)
driver.find_element(By.CLASS_NAME, "loading-complete")

💡 Hint

Explicit waits are preferred for waiting specific conditions.

Option A uses explicit wait with WebDriverWait and expected_conditions, which waits up to 10 seconds for the element. Option A blindly waits 10 seconds regardless of element presence. Option A does not wait at all. Option A sets implicit wait but explicit wait is more reliable for specific conditions.