Database Management Systems Mcqs

Page No. 55

Which of the following is the original purpose of SQL?


aTo specify the syntax and semantics of SQL data definition language


bTo specify the syntax and semantics of SQL manipulation language


cTo define the data structures


dAll of the mentioned


View Answer All of the mentioned

Which of the following statements is/are not true for SQL profiler?


aEnables you to monitor events


bCheck if rows are being inserted properly


cCheck the performance of a stored procedure


dALL of the mentioned



By default sql server has ___________ isolation level


aREAD COMMITTED


bREAD UNCOMMITTED


cSERIALIZABLE


dREPEATABLE READ


View Answer READ COMMITTED

Which of the following fixed database roles can add or remove user IDs?


adb_accessadmin


bdb_securityadmin


cdb_setupadmin


ddb_sysadmin


View Answer db_accessadmin

Problems occurs if we don’t implement a proper locking strategy


aDirty reads


bPhantom reads


cLost updates


dUnrepeatable reads


View Answer Unrepeatable reads

Constraint checking can be disabled in existing _______________ and _____________ constraints so that any data you modify or add to the table is not checked against the constraint.


aCHECK, FOREIGN KEY


bDELETE, FOREIGN KEY


cCHECK, PRIMARY KEY


dPRIMARY KEY, FOREIGN KEY


View Answer CHECK, FOREIGN KEY

Isolation of the transactions is ensured by


aTransaction management


bApplication programmer


cConcurrency control


dRecovery management


View Answer Concurrency control

SNAPSHOT is used for (DBA)


aSynonym


bTablespace


cSystem server


dDynamic data replication



Which of the following is not a property of transactions?


aAtomicity


bConcurrency


cIsolation


dDurability


View Answer Durability

A non-correlated subquery can be defined as ______


aA set of sequential queries, all of which must always return a single value


bA set of sequential queries, all of which must return values from the same table


cA SELECT statement that can be embedded in a clause of another SELECT statement only


dA set of one or more sequential queries in which generally the result of the inner query is used as the search value in the outer query



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