You can get help from the live content support. For details see https://www.udacity.com/wiki/sjsuhelp.
No, not credit will be given for late submissions.
When all the problem set due dates have passed, your best 9 results will be used to calculate your overall score on the problem sets.
No, it doesn't matter how many attempts you take. Taking multiple attempts to solve a question is part of the learning process so we encourage it on practice and problem sets.
Check the navigation bar above the problems. If all the dots are filled in, you have all the questions correctly answered. You may submit your answers as many times as you like without penalty up to the due date.
Do your best! You'll still get credit for the questions you do complete even if you are don't manage to complete all the questions.
No, only the problem sets and three exams contribute to your grade. The practice questions and lectures are to help you develop your understanding and familiarity with the material.
Your grade is based only on your performance on the problem sets, the midterms exams and the final exam. However, anything covered in the lectures could appear on the exams so it is your responsibility to make sure you are familiar with all material presented.
No, it means that you can arrange to take your exam on one of the days within that period. The exams last around 2- 2 1/4 hours each.
No, you will receive no feedback on your answers during examinations. You may submit your answer more than once but only your last submission will be graded.
When we say the exams are proctored, it means that they are supervised. This will happen via a webcam and microphone on your computer. The company that will do the proctoring is called ProctorU. For further details see the for-credit FAQ.