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The process of applying multiple column filters on a table using java script when a keyup event occurs typically involves the following steps:

1. Retrieve the value entered in the search box or filter field.

2. Loop through each row in the table.

3. For each row, loop through each column to check if the value entered in the search box or filter field matches any value in that column.

4. If the value matches a value in a column, set a flag to indicate that the row should be included in the filtered results.

5. After looping through all rows and columns, hide any rows that do not match the filter criteria (as indicated by the flag).

6. Show any rows that do match the filter criteria.

7. Repeat this process every time a keyup event occurs in the search box or filter field, updating the filtered results in real-time.

Additional steps may be necessary depending on the specific implementation, such as handling case-insensitivity or other special characters.