Does CCA175 need Hive and pig or mapreduce concepts? If yes in which CCA175 topic it is covered .
Have you looked over the CCA Spark and Hadoop Developer Exam (CCA175) page on Cloudera.com that explains the exam and the skill requirements? We also have a Cloudera Certification FAQ here on the community based on questions asked here.
When you look over the exam page skill requirements, I suggest thinking about how you would accomplish each task. If your plan involves Hive or Pig, be prepared to use them.