Database Systems Practice Test 53

Java Database Connectivity (JDBC) Quiz Questions and Answers PDF - 53

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Java Database Connectivity (JDBC) Questions and Answers PDF Download: Quiz 53

MCQ 261: The first step in accessing a database from a Java program is to

Open a connection
Open a query
Open a statement
Open a database

MCQ 262: We are often interested in superkeys for which no proper subset is a

Superset key
Superkey
Primary key
Unique key

MCQ 263: Scalar subqueries are also useful in SQL

Insertion statements
Deletion statement
Update statements
Retrieval statement

MCQ 264: The aggregate operations, when an empty collection is applied on the function, return a

0
1
Undefined value
Null value

MCQ 265: ODBC defines the types

HENV
HDBC
RETCODE
All of the Above

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