Probing QCD with the ATLAS Detector

Perturbative QCD calculations at next-to-next-to leading order (NNLO) are available for many processes since several years and can be rigorously tested with a large variety of final states. The latest results from the ATLAS Collaboration involving jets, dijets, photons in association with heavy flavors and vector bosons in association with jets, measured at center of mass energies of 8 and 13 TeV are presented. All measured cross-sections are compared to state-of-the art theory Monte Carlo predictions. The paper concludes with the results of jet-substructure studies at 13 TeV, in particular the measurement of the jet soft-drop mass.