Not only can UKU play both strum and solo notes but you can also play any chord, any voicing, and even create your own chords. You can strum them, finger pick them or use the pattern functionnality.
Acoustic Samples used a very common Kala Mahogany 4 strings concert ukulele (GCEA tuning) and sampled it very thoroughly, every fret of each string with upstrokes, downstrokes, round robins, releases, staccatos, mutes, palm mutes, hand blocks, slides, hammer ons, pull offs, retriggers, fretnoises, percussions and other articulations. All of these details allow them to reproduce the real sound of playing of a ukulele.
Just like the guitar libraries, there are 4 modes (that you can choose using key-switches, G5 to C6), the solo mode that allows to play melodies, the chord mode that helps playing strums or picking very easily, the patterns mode that does all of the strumming or picking for you and finally the MIDI mode that allows you to use your preferred midi guitar controller.