Out of the following, which crime(s) will come under cyber crime category ?

1. Identify theft
2. Invasion of privacy
3. Online harassment
4. All of the above

E-waste is harmful to the environment and human health if not properly treated or disposed of, therefore they must be handled with care. What are the health hazard which can be caused by E-waste ?

1. Lung cancer
2. DNA damage
3. Brain damage
4. All of the above

What will be returned by the given query?

SELECT RIGHT("LEFT", 2) ; 

In the table 'Student' in MySQL, if column 'Fees' contains the data (5000, 8000, 7500, NULL, 5000, 8000), what will be the output after the execution of the given query?

SELECT COUNT(DISTINCT Fees) FROM student;