What is a Fa\u00e7ade Facade classes are the public classes in a package for public

What is a façade facade classes are the public

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75. What is a Façade? 76. Define DBMS?A database management system (DBMS) is a program that enables thecreation and maintenance of a collection of related data. 77. What is database model? 78. Name the two categories of database model? 79. Write the six categories for the life time of data Transient results to the evaluation of expressions, variables involves in procedure activation, global variables and variables that are dynamically allocated, data that exist between the execution of a program, data that exist between the versions of a program, data that outlive a program. 80. What is schema or metadata? 81. Name the three types of data base model? 82. Define data definition language. 83. Define data manipulation language. 84. When the transaction is said to commit. The transaction is said to commit if all changes can be made successfully to the database. 85. When the transaction is said to abort.
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The transaction is said to abort if all changes to the database can not be made successfully. 86. What is conservative or pessimistic policy? 87. Describe client server computing.
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