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

A) Open a connection

B) Open a query

C) Open a statement

D) Open a database

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

A) Superset key

B) Superkey

C) Primary key

D) Unique key

MCQ 263: Scalar subqueries are also useful in SQL

A) Insertion statements

B) Deletion statement

C) Update statements

D) Retrieval statement

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

A) 0

B) 1

C) Undefined value

D) Null value

MCQ 265: ODBC defines the types

A) HENV

B) HDBC

C) RETCODE

D) All of the Above

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