The purpose of this study is to assess the efficacy and safety of treatment with olaparib (MK-7339) in combination with pembrolizumab (MK-3475) in adults with previously treated, advanced (metastatic and/or unresectable) Homologous Recombination Repair Mutation (HRRm) and/or Homologous Recombination Deficiency (HRD)-positive solid tumors.