3. System Architecture
There are several components implemented in the
platform. Figure2 shows the architecture of the
assessment platform. All components are classified
into two major subsystems, QTI Compliant Exam
Runtime Environment on DTV and Assessment
Management Server. The runtime environment is an
application executed on users’ set-top boxes. It is used
for presenting tests and other essential interfaces to
learners. This application also handles users’
interactions via remote control and transmits
information to server. The assessment management
server stores quizzes compliant with the IMS QTI
specification.