1. Look at the language:

The official language of India is English, but in fact, many Indian low castes and Dalits can't speak English. English is the language of communication between the high castes in India, and it is a kind of glory that can reflect the identity of the high castes in India.

A person who can't speak English can never be integrated into the circle that can speak English, so being able to speak English can also be regarded as a way to distinguish between high caste and low caste in India.

2. Look at the skin color:

Generally, the whiter the skin color, the higher caste is likely, and those with brown skin are also indigenous inhabitants, that is, the lower caste.

3. Look at marriage:

It is a habit for a high caste to marry a low caste in India, but it is a sin for a high caste to marry a low caste. It is forbidden to get married between high-caste and low-caste in India, but in fact, this regulation is only limited to high-caste women and low-caste men in India. If a high-caste man in India wants to marry a low-caste man, it is acceptable.

Extended information:

The caste system was used in India, Bangladesh, Sri Lanka and other countries [1]? A universal social system based on bloodline theory, in which India is the most serious. Also known as the base membership system.

This system divides people into four grades, namely Brahman, Khrushchev, Vedas, sudra and Da Park Jung Su.

Brahmins of the first rank are mainly monks and nobles, who have the privilege of explaining religious classics and offering sacrifices to the gods, and enjoy the right of dedication. They are the main education and audience of Khrushchev, and are responsible for monopolizing cultural education, reporting agricultural seasons and interpreting religious discourse.

The second-level Khrushchev is a military aristocrat, an administrative aristocrat, and an audience of Brahman thought. They have the privilege of collecting various taxes, take charge of the army, and are responsible for guarding the Brahman class from generation to generation;

The third-grade Vedas are ordinary Aryans, who have no political privileges, and must support the first two grades in the form of giving and paying taxes, which are the main businesses;

The majority of sudra in the fourth class are conquered indigenous people, belonging to non-Aryans, and composed of senior servants and craftsmen who serve meals and cook, making it the most populous caste. A profession considered low.

In the caste system, offspring born to parents from different castes are called hybrid surnames.

Reference: Baidu Encyclopedia-Caste System