India has a single integrated judicial system, with the Supreme Court at the apex and followed by the High Courts in the States. The Supreme Court controls all courts and tribunals in the territory of India. The High Court controls and supervises the functioning of the subordinate courts e.g., District Courts, in its territorial jurisdiction. The High Courts have Appellate jurisdiction, regarding decisions of the lower courts while Supreme Court can hear appeals in civil, criminal, and constitutional cases against decisions of the High Courts.
Supreme Court has original Jurisdiction such as in disputes about the election of the President or Vice President which are it’s exclusive jurisdiction. Both, Supreme Court and High Court have Writ Jurisdiction i.e., they can issue directives or writs such as Habeas Corpus in case of violation of a person’s fundamental rights. In case of appointment of judges of High Courts, the President also consults the Chief Justice of the Supreme Court.
