Grid architecture (hub and node) in Selenium Python - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to start a Selenium Grid hub using the command line.

Selenium Python

java -jar selenium-server-[1].jar hub

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

Aserver

Bstandalone

Cgrid

Dnode

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'standalone' instead of 'server' in the jar file name.

Using 'node' which is for starting nodes, not the hub.

The correct command to start the Selenium Grid hub uses the server jar file: selenium-server.jar.

2fill in blank

medium

Complete the code to register a node to the Selenium Grid hub.

Selenium Python

java -jar selenium-server-[1].jar node --hub http://localhost:4444/grid/register

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

Astandalone

Bnode

Cgrid

Dserver

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'standalone' or 'node' as jar file name instead of 'server'.

Forgetting to specify the hub URL.

Nodes are started using the same server jar file as the hub, so the correct jar is selenium-server.jar.

3fill in blank

hard

Fix the error in the Python code to create a remote WebDriver session on the Selenium Grid hub.

Selenium Python

from selenium import webdriver
from selenium.webdriver.common.desired_capabilities import DesiredCapabilities

driver = webdriver.Remote(
    command_executor='http://localhost:4444/wd/hub',
    desired_capabilities=[1]
)

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

ADesiredCapabilities.chrome

BDesiredCapabilities.CHROME

CDesiredCapabilities.Firefox

DDesiredCapabilities.firefox

Attempts:

3 left

💡 Hint

Common Mistakes

Using lowercase attribute names which do not exist.

Using Firefox capabilities when Chrome is intended.

The correct attribute for Chrome capabilities is DesiredCapabilities.CHROME in uppercase.

4fill in blank

hard

Fill both blanks to create a dictionary of desired capabilities for Firefox with JavaScript enabled.

Selenium Python

capabilities = {
    'browserName': [1],
    'javascriptEnabled': [2]
}

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

A'firefox'

BTrue

CFalse

D'chrome'

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'chrome' instead of 'firefox' for browserName.

Setting javascriptEnabled to False which disables scripts.

The browser name for Firefox is 'firefox' and JavaScript should be enabled with True.

5fill in blank

hard

Fill all three blanks to create a Selenium Grid node configuration dictionary with max sessions 5, port 5555, and hub URL.

Selenium Python

node_config = {
    'maxSession': [1],
    'port': [2],
    'hub': '[3]'
}

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

A5

B5555

Chttp://localhost:4444/grid/register

D4444

Attempts:

3 left

💡 Hint

Common Mistakes

Using port 4444 which is the hub port, not node port.

Using incomplete or wrong hub URL.

The maxSession should be 5, port 5555, and the hub URL is http://localhost:4444/grid/register for node registration.