Deck 16: Databases

Question 1

What string lists the protocol that should be used to access a database, the name of the database, and potentially other items?

A) JDBC driver
B) Database URL
C) JDBC locator
D) Database specifier

Answer 1

B

Question 2

Of the following column names, which one is most likely a primary key column?

A) Price
B) Description
C) ItemNumber
D) Quantity

Answer 2

C

Question 3

This type of SQL statement is used to retrieve the rows from a table.

A) GET
B) SELECT
C) READ
D) RETRIEVE

Answer 3

B

Question 4

Which of the following shows how a single quote is represented as part of a string in SQL?

A) _'
B) "'"
C) /'
D) ''

Question 5

This is the standard language for working with database management systems.

A) SQL
B) BASIC
C) ADA
D) COBOL

Question 6

What SQL operator can be used to perform a search for a substring?

A) STR
B) LIKE
C) WHERE
D) SUB

Question 7

You use this statement in SQL to insert a new row into a table.

A) UPDATE
B) ADD
C) NEW
D) INSERT

Question 8

In SQL, this character can be used as a wildcard to represent a single character.

A) %
B) $
C) _
D) *

Question 9

What do most developers prefer to use when developing applications that work with an intensive amount of data?

A) text files
B) binary files
C) a database management system
D) Java DB

Question 10

A result set is an object that is somewhat similar to a collection and

A) contains the results of an SQL statement.
B) allows the program to execute an SQL statement.
C) predicts the outcome of an SQL statement.
D) provides rules for how an SQL statement should be executed.

Question 11

What does JDBC stand for?

A) Java data binary collection
B) Java database connectivity
C) Java database collection
D) Java data basic computation

Question 12

Which Statement interface method should be used to execute an INSERT statement?

A) executeUpdate
B) executeStatement
C) executeQuery
D) executeSQL

Question 13

The DBMS works directly with the data, and sends the results of operations

A) back to the application.
B) along the encrypted data path.
C) to the unified data component.
D) back to the Web server.

Question 14

What will happen if you try to store duplicate data in a primary key column?

A) The column is duplicated.
B) An error will occur.
C) The duplicate data will have concurrency issues.
D) The primary key column will not display the duplicate data.

Question 15

SQL stands for

A) structured query language.
B) standard equivalent language.
C) semiconductor qualified language.
D) simple equation library.

Question 16

Which Statement interface method should be used to execute a SELECT statement?

A) executeSQL
B) executeStatement
C) executeUpdate
D) executeQuery

Question 17

The data that is stored in a row is divided into which of the following?

A) sections
B) tables
C) bytes
D) columns

Question 18

If you wish to sort the results of an SQL query, you can use the ________ clause.

A) SORT BY
B) ALIGN ROW
C) ORDER BY
D) ASCEND

Question 19

In SQL, this is the not-equal-to operator.

A) !=
B) NOT
C) ||
D) <>

Question 20

What SQL operator can be used to disqualify search criteria in a WHERE clause?

A) AND
B) NOT
C) EXCLUDE
D) NOR

Question 21

What is the default concurrency level of a ResultSet object?

A) Public
B) Updatable
C) Private
D) Read-only

Question 22

No two rows in a table can have the same value in the primary key column.

Question 23

In an entity relationship diagram, the primary keys are denoted with

A) (PK).
B) (1).
C) (KEY).
D) (PRIME).

Question 24

A qualified column name takes the following form:

A) ColumnName.TableName
B) TableName.ColumnName
C) RowName.TableName
D) DatabaseURL.ColumnName

Question 25

Which of the following is a Swing component that displays data in a two-dimensional table?

A) JTable
B) JFrame
C) JPanel
D) JTable2D

Question 26

SQL statements that are stored in the DBMS are called resident queries.

Question 27

In SQL, the equal to operator is ==, which is the same as Java.

Question 28

In SQL, this statement is used to change the contents of an existing row in a table.

A) SET ROW
B) CHANGE
C) UPDATE
D) REFRESH

Question 29

A column in one table that references a primary key in another table is known as what?

A) Secondary key
B) Foreign key
C) Referential key
D) Meta key

Question 30

In SQL, the REFERENCES qualifier ensures referential integrity between tables.

Question 31

System designers commonly use UML diagrams to show the relationships between database tables.

Question 32

This SQL statement can be used to create a database table.

A) NEW TABLE
B) MAKE TABLE
C) BUILD TABLE
D) CREATE TABLE

Question 33

Which SQL statement is used to delete a table from a database?

A) REM TABLE
B) DEL TABLE
C) DROP TABLE
D) ERASE TABLE

Question 34

The columns in a table are assigned SQL data types.

Question 35

In a transaction, all updates to database must be successfully executed.

Question 36

In SQL, you use this statement to delete one or more rows from a table.

A) DELETE
B) DROP ROW
C) REMOVE
D) PURGE

Question 37

The term commit refers to undoing changes to a database.

Question 38

What term refers to data that describes other data?

A) Pseudo-data
B) Micro data
C) Abstract data
D) Meta data

Question 39

Although SQL is a language, you don't use it to write applications.

Question 40

SQL does not provide functions for performing calculations.