The tree has oblong rounded leaves with singled green blue looking berries on it
Majority of fruit tree have large leaves and you will notice that buds grow on such trees before making actual fruits on these trees so this is the way you can identify such trees.
I have a fruit ree in my back yard, the tree had pink flowers in blossom and now the tree is red with little red cherry looking fruits....just not in a bundle like cherry's? What is this tree?