Weird question
Edit solved - it seems that in the context of the question about exhaust flow pic 1 is indeed ducted and pic 2 unducted. The passage the question in the asa oral and practical prep book came from page 3-25 of the 8083-32b if you want to read it for yourself. Its just a poor choice of descriptors. - page 1-56 explains it a lot more clearly and uses unmixed/separate or mixed/common nozzles instead of ducted or unducted.
Studying for my powerplant and came across this question. Maybe I just need sleep but I'm stuck on this one. Are these examples of ducted and unducted fan turbine engines? The 8083 book only shows an example of unducted(second image).
Q- How is exhaust flow different in a ducted fan turbine engine verses an unducted fan engine? (AM.III.L.K2)
A- Ducted fan engines take the fan airflow and direct it through closed ducts along the engine. Then, it flows into a common exhaust nozzle. The core exhaust flow and the fan flow mix and flow from the engine through this mixed nozzle. The unducted fan has two nozzles, one for the fan airflow and one for the core airflow. These both flow to ambient air separate from each other and have separate nozzles.