Assad Javaid

701.Making a change to the conceptual schema of a database but not affecting the existing external schemas is an example … Read more

651.Which feature of database provides conversion from inconsistent state of DB to a consistent state ensuring minimum data los? User … Read more

601.Which  of the following constraint is used to limit the value range that can be placed Default Unique None Check … Read more

 555.Which TL command is used to permanently save any transaction into database? rollback save point commit None of the above … Read more

501.You want to create a composite PK using the first and third fields in the table. How is this done? … Read more

451.Which of the following is used with INSERT command to insert values in a DB table? Select correct option: ONTO … Read more

401.A hierarchical data model is : Partially ordered Not ordered Totally ordered Concept of ordering does not appear 402.A form … Read more

301.Which of the following is not true regarding DB transactions ? A set of database operations that are processed partly … Read more

251. DML commands are used for inserting data into databases   creating database destroying databases  creating DB objects .  252.Structural constraints … Read more