'Easy Day', 'Vishal Mega Mart’ and 'Big Bazaar' are the examples of which type of fixed shops?

‘Easy Day’, 'Vishal Mega Mart’ and ‘Big Bazaar’ are the examples of which type of fixed shops?
Give any two merits and demerits of these types of stores also.

‘Easy Day’, ‘Vishal Mega Mart’ and ‘Big Bazaar’ are the examples of departmental stores.
Merits
(i) A departmental store keeps very wide variety of goods with different designs, colours, styles, etc.
(ii) Departmental stores provide various types of services to customers they extend liberal credit,
accept telephone order, provide for free home delivery services, etc. '
Demerits
(i) Only rich persons can afford to buy goods from a departmental store.
(ii) No person attention is given to the customers.