Why synchronization prevents flaky tests in Selenium Python - Test Your Understanding

Practice - 5 Tasks

1fill in blank

easy

Complete the code to wait for an element to be visible before clicking it.

Selenium Python

from selenium.webdriver.support.ui import WebDriverWait
from selenium.webdriver.support import expected_conditions as EC
from selenium.webdriver.common.by import By

wait = WebDriverWait(driver, 10)
element = wait.until(EC.[1]((By.ID, 'submit-button')))
element.click()

Drag options to blanks, or click blank then click option'

Apresence_of_element_located

Belement_to_be_clickable

Calert_is_present

Dvisibility_of_element_located

Attempts:

3 left

💡 Hint

Common Mistakes

Using presence_of_element_located which only checks if element is in DOM but not visible.

Using alert_is_present which waits for alerts, not elements.

The visibility_of_element_located condition waits until the element is visible on the page, ensuring it can be clicked without errors.

2fill in blank

medium

Complete the code to wait until a button is clickable before clicking it.

Selenium Python

from selenium.webdriver.support.ui import WebDriverWait
from selenium.webdriver.support import expected_conditions as EC
from selenium.webdriver.common.by import By

wait = WebDriverWait(driver, 15)
button = wait.until(EC.[1]((By.CSS_SELECTOR, '.btn-primary')))
button.click()

Drag options to blanks, or click blank then click option'

Avisibility_of_element_located

Bpresence_of_element_located

Celement_to_be_clickable

Dframe_to_be_available_and_switch_to_it

Attempts:

3 left

💡 Hint

Common Mistakes

Using presence_of_element_located which does not guarantee clickability.

Using frame_to_be_available_and_switch_to_it which is for frames, not buttons.

The element_to_be_clickable condition waits until the element is visible and enabled, so it can be clicked safely.

3fill in blank

hard

Fix the error in the code to properly wait for an element's text to be 'Loaded'.

Selenium Python

from selenium.webdriver.support.ui import WebDriverWait
from selenium.webdriver.support import expected_conditions as EC
from selenium.webdriver.common.by import By

wait = WebDriverWait(driver, 20)
wait.until(EC.text_to_be_present_in_element((By.CLASS_NAME, 'status'), [1]))

Drag options to blanks, or click blank then click option'

A'Loaded'

BLoaded

C['Loaded']

DLoaded()

Attempts:

3 left

💡 Hint

Common Mistakes

Passing Loaded without quotes causes a NameError.

Passing a list or function call instead of a string.

The text to check must be a string, so it needs quotes around it like 'Loaded'.

4fill in blank

hard

Fill both blanks to create a dictionary comprehension that waits for elements with text length greater than 5.

Selenium Python

elements = driver.find_elements(By.TAG_NAME, 'p')
lengths = {el.text: len(el.text) for el in elements if len(el.text) [1] [2]

Drag options to blanks, or click blank then click option'

A>

B5

C<

D10

Attempts:

3 left

💡 Hint

Common Mistakes

Using '<' instead of '>' reverses the condition.

Using 10 instead of 5 changes the filter threshold.

The condition len(el.text) > 5 filters elements whose text length is more than 5 characters.

5fill in blank

hard

Fill all three blanks to create a dictionary comprehension that maps uppercase texts to their lengths if length is less than 8.

Selenium Python

elements = driver.find_elements(By.CLASS_NAME, 'item')
result = { [1]: [2] for el in elements if len(el.text) [3] 8 }

Drag options to blanks, or click blank then click option'

Ael.text.upper()

Blen(el.text)

C<

Del.text.lower()

Attempts:

3 left

💡 Hint

Common Mistakes

Using lower() instead of upper() changes the key format.

Using '>' instead of '<' reverses the filter condition.

The comprehension maps the uppercase text to its length only if the length is less than 8.