Ask the company or test giver what the focus of the test will be. Get as many specifics as the tester will give. Write down what you are told, and in the order you were told, as this may give insight into what the tester considers most important. Prepare and plan for a timed, multiple-choice, thorough test.
Use what you have been told about test focus as a general guide for preparation. Give the most preparation to the units of study that the test will be built upon. Allocate time and effort in proportion to not only what the test focus is, but also to your areas of weakness.
Look at the entire body of electronics topics. Make your best, objective appraisal of your strengths and weaknesses. Do not presume that you know an area better than you actually do, but plan to at least review even your strongest areas.
Divide the entire body of knowledge that you looked at in Step 3 into its separate components. Plan and arrange your study attack so that you cover your weaknesses more than once on your countdown to test day. Work specifically to improve your reading skills as you study through the material, since your reading and language skills are the key skills for taking the test.
Study as many practice tests as possible leading up to the actual test. Make sure that the practice tests are as similar as possible to the real test that you already have information about. Score these tests to give yourself further preparation direction. Retake the already-scored tests to correct what you missed.
Continue to hone in on the troublesome units of study. Spend the majority of your time on the two or three most difficult concepts that you continue to have the most trouble with, as you study your way through the material. Adopt the strategy of strengthening your weaknesses while maintaining your strengths.
Arrange and rank your remaining, and by now, dwindling, most difficult units sequentially. List them from least to most difficult, just like Step 6. Continue to focus in on and re-study them regularly, even as you cover the other units.