Catechism of the Catholic church provide user with all question and answer as regard their believes

A catechism has been defined as "a book that explains the beliefs of the Christian religion by using a list of questions and answers". Documents of religious instruction have been written since the beginning of Christianity and a catechism is typically an assemblage of these smaller documents into one large compilation of Church doctrine and teachings.

The Catechism is arranged in four principal parts:

The Profession of Faith (the Apostle's Creed)
The Celebration of the Christian Mystery (the Sacred Liturgy and especially the sacraments)
Life in Christ (including the Ten Commandments)
Christian Prayer (including the Lord's Prayer)