What are the main types of database end users,? Discuss the main activi-ties of each

How many different ways are there to order the eight jobs in the queue so that job usu comes somewhere before cdp in the queue (although not necessarily immediately before) and cdp comes somewhere before bbd (again, not necessarily immediately before)?

Write a program that asks for 'name' from the user and then asks for a number and stores the two in a dictionary (called 'the_dict') as key-value pair. the program then asks if the user wants to enter more data (more data (y/n)? ) and depending on user choice, either asks for another name-number pair or exits and stores the dictionary key, values in a list of tuples and prints the list. note: ignore the case where the name is already in the dictionary. example: name: pranshu number: 517-244-2426 more data (y/n)? y name: rich number: 517-842-5425 more data (y/n)? y name: alireza number: 517-432-5224 more data (y/n)? n [('alireza', '517-432-5224'), ('pranshu', '517-244-2426'), ('rich', '517-842-5425')]

Which feature was the first app available on a cell phone? a. game b.contact list c.email d.ringtone