After you create a custom classifier you need to apply it to an interface within the class-of-service stanza. Other hand, the interface ge-1/0/5 is Gbps then the traffic is not exceeded normally; I think the information is uncompleted, however if we suppose there is a 100Mbps rate limit then the packets are classified based on the least significant bit of an incoming packet’s CoS field, (1 -> high, 0 -> low), then the traffic exceeding 100Mbps should be dropped.

The information is in question is not full, Interfaces & Scheduler-maps configurations are missing which is available on few other websites. From the schedulers config it shows "transmit-rate percent 10" for "med-pri-shceduler" which applies to ge-1/0/5 on exit interface. Percentage shows 10% of 1GIG interfaces which drops any traffic above 100m on Ge-1/0/5. So I stick with the answer "Dropped"

D is correct. It considering the available information we can assume that the default scheduler is in action and the traffic will be forwarded.

One can’t assume a rate limit of 100M, there’s no policer specified. And the question specifically states that no other traffic is transiting the router. So, all traffic should be forwarded (Answer D). See here: https://www.juniper.net/documentation/us/en/software/junos/cos-security-devices/topics/concept/cos-scheduler-default-security-setting.html «By default, each queue can exceed the assigned bandwidth if additional bandwidth is available from other queues.»

Yeah, also agree there is missing some information here.