The Indian Constitution embodies the positive concept of secularism ie, all religions in our country (irrespective of their strength) have the same status and support from the state.
A democratic polity, as stipulated in the Preamble, is based on the doctrine of popular sovereignty, that is, possession of supreme power by the people.
The term ‘democratic’ is used in the Preamble in the broader sense embracing not only political democracy but also social and economic democracy.

Universal adult franchise, periodic elections, rule of law, independence of judiciary, and absence of discrimination on certain grounds are the manifestations of the democratic character of the Indian polity.

According to THE RIGHT TO INFORMATION (AMENDMENT) ACT, 2019:
The salaries and allowances payable to and other terms and conditions of service of the Chief Information Commissioner and the Information Commissioners shall be such as may be prescribed by the Central Government.

President may consult the Chief Minister of the state while appointing the Governor.
• It is not mandatory.
• Election Commission cannot take suo-moto decision to disqualify a Member of Parliament. Election Commission advises the president on matters relating to the disqualifications of the members of Parliament.

In a republic, the head of the state is always selected directly or indirectly for a fixed period, eg, USA. Therefore, the term ‘republic’ in our Preamble indicates that India has an elected head called the president. He is elected indirectly for a fixed period of five years.
A republic also means two more things: one, vesting of political sovereignty in the people and not in a single individual like a king; second, the absence of any privileged class and hence all public offices being opened to every citizen without any discrimination.