The Edison Individual Contributor Workstyles Assessment is a pre-employment personality test that is required to take for most Southern California Edison jobs.
The test includes 100 questions which you'll have to finish in 25 minutes. That means you'll have 15 seconds per question on average.
In each question, a statement will be presented, and you'll be asked to determine if you "Strongly Agree" or "Slightly Agree" with it.
This specific test is tricky - those types of tests are called Forced-Choice Personality Tests, a format for question responses requiring respondents to provide an answer, forcing you to make judgments about each response option, even though it will make you "look bad" sometimes.
Here's a sample question so you can see what it is all about: