Disadvantages of Hierarchical Data Model

Not as flexible as other types of databases, not suited for handling complex data relationships, and not compatible with other database models.

One-to-many (1:M) relationship.

Dependent segments falling under it are also deleted.

<p>Using links between records and allowing child records to have more than one parent.</p> Signup and view all the answers

<p>It allows to define user-defined data types and operators and to access them using SQL.</p> Signup and view all the answers

<p>The information related to user-defined types and operators should be kept in the system catalog, requiring redesigning of the system catalog.</p> Signup and view all the answers

<p>Internal level, Conceptual level, External level</p> Signup and view all the answers

<p>It is the storage where data are actually stored and is also known as the physical level.</p> Signup and view all the answers

<p>$300</p> Signup and view all the answers

<p>$150</p> Signup and view all the answers

<p>Isolation is the property of a database where no data should affect the other one and may occur concurrently.</p> Signup and view all the answers

<p>Durability ensures the permanency of something.</p> Signup and view all the answers