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SER 322 FINAL EXAM QUESTIONS AND ANSWERS
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SER 322 FINAL EXAM QUESTIONS ANDANSWERS
Which type of driver provides JDBC access via one or more ODBC
drivers? - ANSWER Type 1 driver
Which of the following provides the application-to-JDBC Manager
connection. - ANSWER JDBC API
With the code below, indicate JDBC coding best practices that have
been violated (this code does compile and run!):
import java.sql.*;
public class StudentData{public static void main(String[] args) {ResultSet
rs = null;Statement stmt = null;Connection conn = null;try
{Class.forName("org.postgresql.Driver");conn =
DriverManager.getConnection(args[2], args[0], args[1]);stmt =
conn.createStatement();rs = stmt.executeQuery("SELECT * FROM
Student WHERE rollno='" + args[3] + "'");while (rs.next())
{System.out.print(rs.getInt(1) + "\t");System.out.print(rs.getString(2) + "\t
");System.out.print(rs.getInt(3) + "\t
");System.out.println(rs.getDate(4));}stmt.close();stmt = null;rs.close();rs
= null;}catch (Exception exc) {exc.printStackTrace();}}} - ANSWER
Answers 1-6 all apply
In JDBC, it is a good practice to use standard SQL statement and avoid
using db specific query until necessary. - ANSWER true
Which statement about JDBC is true? - ANSWER JDBC stands for
Java Database Connectivity
Match the resource type with the best description - ANSWER
Represents the socket between client and server
Connection
Represents a query to the database
Statement
Corresponds to a cursor in the database server
ResultSet
, Represents a pre-compiled and/or parameterized query
Prepared Statement
Which of the following are not benefits of XML over traditional relational
data modelling? - ANSWER Support for Large Objects (LOBs)
When XML is used as a DDL, we want to ensure the XML conforms to
this so structural constraints may be specified: - ANSWER DTD or XML
Schema
The type of XML Parsing that is parses an XML document based on
expression and is used extensively in conjunction with XSLT. -
ANSWER XPath Parsing
On the XML below, which XPath expression will return all of the values
of title attributes?
<slideshowtitle="Sample Slide Show"date="Date of
publication"author="Yours Truly"><!-- TITLE SLIDE --><slide
type="all"><title>Wake up to WonderWidgets!</title></slide><!--
OVERVIEW --><slide type="all"><title>Overview</title><item>Why
<em>WonderWidgets</em> are great</item><item>Who
<em>buys</em> WonderWidgets</item></slide></slideshow> -
ANSWER //@title
Well formed XML document means - ANSWER must contain one or
more elements and root element must contain all other elements
A transaction is delimited by statements (or function calls) of the form
__________. - ANSWER Begin transaction and End transaction
All functional dependencies must _________. - ANSWER have
attributes of the same table
Assume that a relation R has the following properties. What is the
normal form of R?
No multi-valued attributes
No partial key dependencies - ANSWER Second Normal Form
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