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What three major types of actions includes databases? Briefly discuss these
The three major types of actions including databases are:
(i) Defining: It includes specifying the data types, structures and constraints of data types, structures and constraints the data to be stored within the database.
(ii) Manipulating: It involves functions such as querying the database to retrieve specific data updating the database to reflect changes within the miniworld and generating reports form data.
(iii) Sharing: It permits multiple users and programs to access the database at the same time.
What is storage manager? A storage manager is a program module that gives the interface between the Low level data kept in a database and the application programs
What is Thread splitting A thread of control is a path by which a set of state diagrams on that a single object is active at a time. Objects are shared between threads
How many levels can be viewed in Architecture of the database ? Architecture of the database can be viewed as three levels.
Define data model? A data model is a collection of conceptual tools for explaining data, data relationships, data semantics and consistency constraints.
What is an ERD?
Problem Explain at least five relational algebraic operators with a suitable example. Note: All the above descriptions should be done by taking at least two examples from ou
Consider the subsequent relations for a database which keeps track of business trips of salespersons in a sales office: SALESPERSON (SSN, Name, start_year, Dept_no) TRIP (SSN, Fr
What are the drawbacks of shadow-paging technique? The drawbacks of shadow paging is:- a) Commit Overhead b) Data fragmentation c) Garbage collection
ERD Diagram of Medical Recruitment Agency?
Describe logical data independence ? Logical Data Independence - It is the capacity to modify the conceptual schema without having to change external schemas or application p
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