An adjective is a word that describes the quality of a noun or a pronoun.
She has a beautiful house. Sachin is a great cricketer. He is a tall boy. This book is mine.
In the above sentence, the word in bold letter is an adjective.
A descriptive adjective is a word that helps to describe nouns and pronoun. Example: I am hungry. He is a good player. She has pleasing manners. He has smiling face. She is very beautiful. (In the above sentence, the word hungry, good, pleasing, smiling, and very is descriptive adjective.)
Possessive adjective is a word that indicates a relationship of ownership. Example: It is my shirt. His car is fast. She is going to her home. Our job is to look after correspondence. Her dressing sense is mesmerizing. (In the above sentence, the word, my, his, her, our, and her is possessive adjectives.)
The demonstrative adjective is a word that refers to a specific person, place, or thing. Example: I love this shirt. That horse is really fast. These pictures are lovely. Who are those people? (In the above sentence, the word this, that, these, and those are demonstrative adjectives.
An interrogative adjective is a kind of word that request specific information about the noun. Example: What kind of person you are? Which company do you want to work with? Whose car is that? (In the above sentence, the word what, which, and whose is interrogative adjectives.)
And indefinite adjective is a king of word that is something identifiable but not definite. It is a vague word like "some" or "many". Example: I gave some candy to him. Many people wanted to party. A few people wanted to visit shopping malls. Some people wanted to invest in gold. Each student will have to submit their homework on Friday. (In the above sentence, the word some, many, few, some, and each is an indefinite adjective.)