MCQ IN COMPUTER SCIENCE & ENGINEERING

Detailed explanation-1: -Data items that are divided into sub-items are called Group items. Ex: An Employee Name may be divided into three subitems-first name, middle name, and last name. Entity: An entity is something that has certain attributes or properties which may be assigned values. The values may be either numeric or non-numeric.

Detailed explanation-2: -A data item that does not have subordinate data items is called an elementary item . A data item that is composed of one or more subordinate data items is called a group item . A record can be either an elementary item or a group item.

Detailed explanation-3: -A data item describes an atomic state of a particular object concerning a specific property at a certain time point. A collection of data items for the same object at the same time forms an object instance (or table row). Any type of complex information can be broken down to elementary data items (atomic state).

Detailed explanation-4: -A data item is a container of data that is registered with the server. The set of data items registered with the server comprises the server’s data store. A data item contains all the information required by the server to connect to a folder or database while serving out one or more GIS services.

Detailed explanation-5: -A unit of data stored in a field. For example, “M000675” and “M000676” are data items in the “Account Number” field in two records (the data element “Account Number").