Mar 28, 1) Define Database. A prearranged collection of figures known as data is called database. 2) What is DBMS? Database Management Systems. Commonly asked DBMS interview questions | Set 1. What are advantages of DBMS Source: bestthing.info Technical interview questions and answers section on "DBMS Basics" with freshers can download DBMS Basics quiz questions with answers as PDF files and.
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dbms interview questions and answers for freshers | database management system dbms interview questions with answers pdf, interview questions for dbms. Mar 27, interview questions? If not, then dig into some technical insights for DBMS. Interview Questions. Download DBMS Interview Questions PDF. + Dbms Interview Questions and Answers, Question1: What is a DBMS? Question2: What is Relationship set? Question3: What is Relationship type?.
Its syntax is: DROP objecttype objectname. Full recordings of two tables is Union All operator.
Why DBMS Basics Interview Questions?
A distinct recording of two tables is Union. A database object which helps in manipulating data row by row representing a result set is called cursor.
They are: Dynamic: it reflects changes while scrolling. Static: doesn't reflect changes while scrolling and works on recording of snapshot. Keyset: data modification without reflection of new data is seen.
They types of cursor are: Implicit cursor: Declared automatically as soon as the execution of SQL takes place without the awareness of the user. A query contained by a query is called Sub-query.
Group-clause uses aggregate values to be derived by collecting similar data.
Functions which operate against a collection of values and returning single value is called aggregate functions 24 Define Scalar functions. Scalar function is depended on the argument given and returns sole value.
Restrictions that are applied are: Only the current database can have views. You are not liable to change any computed value in any particular view.
DBMS Interview Questions.pdf
Full-text index definitions cannot be applied. Temporary views cannot be created. Temporary tables cannot contain views. A 'correlated subquery' is a sort of sub query but correlated subquery is reliant on another query for a value that is returned.
DBMS Interview Questions
In case of execution, the sub query is executed first and then the correlated query. Storage and access of data from the central location in order to take some strategic decision is called Data Warehousing. Enterprise management is used for managing the information whose framework is known as Data Warehousing.
Joins help in explaining the relation between different tables. They also enable you to select data with relation to data in another table.
Blank rows are left at the specified side by joining tables in other side.
Indexes help in improving the speed as well as the query performance of database. The procedure of boosting the collection of indexes is named as Index hunting. Index hunting helps in improving the speed as well as the query performance of database.
The followed measures are achieved to do that: The query optimizer is used to coordinate the study of queries with the workload and the best use of queries suggested based on this.
Index, query distribution along with their performance is observed to check the effect. Tuning databases to a small collection of problem queries is also recommended.
Ans: Identity or AutoNumber is a column that automatically generates numeric values. A start and increment value can be set, but most DBA leave these at 1. A GUID column also generates numbers; the value of this cannot be controlled. What is a view in SQL? We can create using create view syntax.
Views can represent a subset of the data contained in a table; consequently, a view can limit the degree of exposure of the underlying tables to the outer world: a given user may have permission to query the view, while denied access to the rest of the base table.
Views can join and simplify multiple tables into a single virtual table 3.
Views can act as aggregated tables, where the database engine aggregates data sum, average etc. Views can hide the complexity of data; for example a view could appear as Sales or Sales, transparently partitioning the actual underlying table 5.
Views take very little space to store; the database contains only the definition of a view, not a copy of all the data which it presents. Ans: A Trigger is a code that associated with insert, update or delete operations.
The code is executed automatically whenever the associated query is executed on a table. Triggers can be useful to maintain integrity in database. What is a stored procedure? Ans: A stored procedure is like a function that contains a set of operations compiled together.
It contains a set of operations that are commonly used in an application to do some common database tasks. What is the difference between Trigger and Stored Procedure?What Is File Manager? Index, query distribution along with their performance is observed to check the effect.
Ans: This is basically a constraint which is useful in describing the relationship among the different attributes in a relation. Q 2 What is meant by a Database?
It is used to minimize redundancy and also minimize insertion, deletion and update distractio Question Providing backup and recovery. Career-oriented Training.
December 20, at 2:
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