Which is the highest Court dealing with Criminal cases at the District level?

What is the distinction between the Court of the District Judge and the Sessions Judge?
Or
Mention the types of cases being heard by the Court of the District Judge and the Sessions Judge.
Or
What is the distinction between Civil and Criminal Courts?

The organisation of Subordinate Courts varies from State to State, but the essential features are the same. Describe the organisation of Civil Courts in a District under the following headings:

(a) The Court of the District Judge

(b) Appointment and Qualifications of a District Judge

Present day Criminal Courts in every district usually have a three-tier structure. In this context describe:

(a) Organisation of the Sessions Court

(b) Organisation of the Court of the Chief Judicial Magistrate