They bluff to clients, saying "We can do all of these," or make unfounded promises to provide clients with certain information (the company doesn't actually have those resources), and then come back and ask you to do it.
When you go for an internship, no one really teaches you anything. They expect you to be ready to contribute immediately; otherwise, they tell you to get lost.
Or they tell you there’s a one-week trial (meaning they don’t pay you), then make you work overtime for a week before telling you that you’re not suitable. Bye-bye.
Not only do you work more than twelve hours a day, but you also have to accommodate the boss’s “mood” and work overtime on weekends. There is no overtime pay, no compensatory leave, and the salary is pitifully low.