You can access and consult online library resources but you are advised to do this in advance of the exam as part of your preparation, rather than relying on having access when the exam is live.

You should not rely on the availability of a particular e book, journal or database while the exam is live. Access to these resources is dependent on a number of factors, including limits on the number people who can read it at the same time, so you are advised to consult key library resources in advance of the live exam.