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

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bTo specify the syntax and semantics of SQL manipulation language

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cTo define the data structures

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dAll of the mentioned

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View Answer All of the mentioned

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


aEnables you to monitor events

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bCheck if rows are being inserted properly

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cCheck the performance of a stored procedure

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dALL of the mentioned

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By default sql server has ___________ isolation level


aREAD COMMITTED

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bREAD UNCOMMITTED

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cSERIALIZABLE

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dREPEATABLE READ

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View Answer READ COMMITTED

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


adb_accessadmin

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bdb_securityadmin

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cdb_setupadmin

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ddb_sysadmin

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View Answer db_accessadmin

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


aDirty reads

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bPhantom reads

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cLost updates

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dUnrepeatable reads

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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

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bDELETE, FOREIGN KEY

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cCHECK, PRIMARY KEY

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dPRIMARY KEY, FOREIGN KEY

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View Answer CHECK, FOREIGN KEY

Isolation of the transactions is ensured by


aTransaction management

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bApplication programmer

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cConcurrency control

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dRecovery management

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View Answer Concurrency control

SNAPSHOT is used for (DBA)


aSynonym

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bTablespace

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cSystem server

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dDynamic data replication

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Which of the following is not a property of transactions?


aAtomicity

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bConcurrency

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cIsolation

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dDurability

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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

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

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

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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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