Exception handling in Selenium refers to the process of identifying and handling errors or exceptions that can occur during test automation using Selenium WebDriver. Exceptions can occur due to a variety of reasons such as invalid input, incorrect configuration, network connectivity issues, server errors, etc.

In Selenium, exceptions are represented by the WebDriverException class, which is a subclass of the RuntimeException class. When an exception occurs during test execution, Selenium WebDriver throws an instance of the WebDriverException class. You can even check in-depth and Upskill yourself Software Testing Fundamentals concepts from Selenium Certification.

To handle exceptions in Selenium, you can use try-catch blocks in your test code. By catching exceptions, you can gracefully handle the error and take appropriate action to recover from the error. For example, you can retry the failed step, take a screenshot of the error, log the error, or terminate the test gracefully.

In Selenium, you can handle web tables using the following steps:

1. Locate the web table on the page using an appropriate selector such as ID, name, class name, or xpath.

2. Use the find_elements method to find all the rows in the table.

3. Iterate over the rows using a for loop and find all the cells in each row using the find_elements method.

4. Extract the text from each cell using the text property.

Here is an example of how to extract data from a simple table with two rows and three columns:

# locate the table using its ID
table = driver.find_element_by_id("myTable")

# find all the rows in the table
rows = table.find_elements_by_tag_name("tr")

# iterate over the rows
for row in rows:
# find all the cells in each row
cells = row.find_elements_by_tag_name("td")
# extract the text from each cell
for cell in cells:
print(cell.text)

This code will output the text from each cell in the table.

You can also use the row_index and col_index properties of the cells to extract data from specific cells in the table. For example, to extract the text from the second cell in the first row of the table:

# locate the table using its ID
table = driver.find_element_by_id("myTable")

# find the first row in the table
row = table.find_elements_by_tag_name("tr")[0]

# find the second cell in the row
cell = row.find_elements_by_tag_name("td")[1]

# extract the text from the cell
print(cell.text)

This code will output the text from the second cell in the first row of the table.