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

Challenge - 5 Problems

❓ locator

intermediate

Identify the correct Selenium locator for element by ID

Which of the following Selenium Python commands correctly finds an element by its ID "submit-btn"?

A driver.find_element(By.NAME, "submit-btn")

B driver.find_element_by_id("submit-btn")

C driver.find_element(By.CLASS_NAME, "submit-btn")

D driver.find_element(By.ID, "submit-btn")

💡 Hint

Use the modern Selenium syntax with By.ID for locating by ID.

In Selenium 4+, the recommended way to find elements by ID is using driver.find_element(By.ID, "id_value"). The older method find_element_by_id is deprecated. Using CLASS_NAME or NAME will not find by ID.

❓ assertion

intermediate

Check if element found by ID is visible

Given you found an element by ID "login-input", which assertion correctly verifies the element is visible on the page?

Selenium Python

element = driver.find_element(By.ID, "login-input")

A assert element.is_displayed() == True

B assert element.is_enabled() == False

C assert element.text == ""

D assert element.get_attribute('visible') == 'true'

💡 Hint

Use the Selenium method that checks if an element is visible.

The is_displayed() method returns True if the element is visible. is_enabled() checks if element is enabled for interaction, not visibility. text and get_attribute('visible') do not reliably indicate visibility.

❓ Predict Output

advanced

Output of Selenium find_element by ID with missing element

What error will this Selenium Python code raise if no element with ID "nonexistent" is found?

Selenium Python

element = driver.find_element(By.ID, "nonexistent")

A selenium.common.exceptions.NoSuchElementException

B AttributeError

C No error, returns None

D TimeoutException

💡 Hint

Think about what Selenium does when it cannot find an element immediately.

find_element throws NoSuchElementException if the element is not found. It does not return None or raise AttributeError or TimeoutException by default.

🔧 Debug

advanced

Debug why find_element by ID fails

You wrote this code but it fails to find the element by ID "search-box". What is the most likely reason?

Selenium Python

element = driver.find_element(By.ID, "search-box")
element.send_keys("test")

A The element is disabled, so find_element cannot find it

B The element is inside an iframe and driver did not switch to it

C The ID "search-box" is misspelled in the code

D The page has not fully loaded, so the element is not present yet

💡 Hint

Think about elements inside frames and how Selenium handles them.

If the element is inside an iframe, Selenium cannot find it unless you switch to that iframe first. Misspelling or page load issues can cause failure but the most common cause is iframe context.

❓ framework

expert

Best practice for waiting for element by ID before interaction

Which Selenium Python code snippet correctly waits up to 10 seconds for an element with ID "submit" to be clickable before clicking it?

A driver.find_element(By.ID, "submit").click() # No wait

B

time.sleep(10)
driver.find_element(By.ID, "submit").click()

C WebDriverWait(driver, 10).until(EC.element_to_be_clickable((By.ID, "submit"))).click()

D

driver.implicitly_wait(10)
driver.find_element(By.ID, "submit").click()

💡 Hint

Use explicit waits with expected conditions for reliable interaction.

Explicit wait with WebDriverWait and expected_conditions ensures the element is clickable before clicking. time.sleep is unreliable and slows tests. Implicit wait waits for presence but not clickability.