All questions in Class Notes – Database Management System
Following is a list of all the question in the section Class Notes: Database Management System. When new class notes will be added, links of those posts will be added to this list too.
April 5, 2016
Draw the database system architecture. DBMS
Following is a flowchart drawing of Database system architecture.
Who is Database administrator? Write some functions of DBA in DBMS
Database Administrator: One of the main reasons behind using DBMS is to have central control on both data and the applications access those data. The person who has such central control over the data is called a database administrator (DBA). Some of the functions of DBA are given below, Schema Definition: The DBA creates the …
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Describe different types of database users and their interfaces. DBMS
There are about 4 different types of database users differentiated by their way of interaction with the database system. Brief description has been given below, Naive Users: This type of users generally interacts with the system through previously created programs. Such as, a user may use the system to transfer some balance from one account …
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What is transaction? What is Transaction Management? DBMS
Transaction: A transaction is a collection of operations that performs a single logical function in a database application. Such as, when we want to add BDT 500 to account A and subtract BDT 500 from account B, that will be a transaction. Transaction Management: Transaction is a unit of both atomicity and consistency. Thus it …
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Briefly describe the two-tier and three-tier architecture. DBMS
Two-tier Architecture: In the two-tier architecture, the application is partitioned into a component that resides at the client machine and calls the database system functionality at the server machine using query language statements. Application program interface standards like ODBC and JDBC are used for interaction between the client and the server. Three-tier Architecture: In three-tier …
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Describe the components of the query processor. DBMS
Query Processor: As query is very much necessary to find out only the data user need from tons of data of the database, query processor is very important to process these query requests. Query processors come with the following components, DDL Interpreter: It interprets the DDL statements and records the definitions in data dictionary. DML …
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Describe the data structures implemented by the storage manager.
Data Structures Implemented by the Storage Manager: The storage manager implements several data structures as part of the physical system implementation. Data Files: It stores the database itself. Data Dictionary: It stores metadata about the structures of the database, in particular schema of the database. Indices: It can provide fast access to data items. It …
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What is storage manager? Describe the components of storage manager. DBMS
Storage Manager in a Database Management System in DBMS The Storage Manager is a crucial component of a Database Management System (DBMS) that handles the storage, retrieval, and management of data on secondary storage devices. It acts as a bridge between the higher-level components of the DBMS, such as the query processor and transaction manager, …
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In how many ways can database constraints be tested/evaluated? Describe briefly. DBMS
Database Constraints: Database constraints are like conditions given to the manipulation of values of a field or attribute. Such as, we may limit the values under the payment attribute of a table that its value can never be less than BDT 350. Constraints can be tested as follows, Domain Constraints: Using domain constraints one can …
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