Deck 15: Databases

Question 1

The term commit refers to undoing changes in a database.

Answer 1

False

Question 2

Which type of SQL statement is used to retrieve the rows from a table?

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

Answer 2

B

Question 3

SQL does not provide functions for performing calculations.

Answer 3

False

Question 4

Of the following, which shows how a single quote (') is represented as part of a string in SQL?

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

Question 5

The columns in a table are assigned SQL data types.

Question 6

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

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

Question 7

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

A) The column will be 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 8

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

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

Question 9

SQL stands for

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

Question 10

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

Question 11

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

Question 12

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 13

The standard lanuage for working with database management systems is __________.

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

Question 14

The data that is stored in a row of a database is divided into

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

Question 15

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

Question 16

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

Question 17

Which of the following 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 18

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

Question 19

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

Question 20

In SQL the REFERENCES qualifier ensures referential integrity between tables.

Question 21

What string lists the protocol rhat 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

Question 22

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

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

Question 23

In an entity relationship diagram, the primary key is denoted with

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

Question 24

What does JDBC stand for?

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

Question 25

Which of the following can be used as a wildcard to represent a single character in SQL?

A) %
B) $
C) the underscore (_)
D) *

Question 26

Of the following, which is the not-equal-to operator in SQL?

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

Question 27

To sort the results of a SQL query, you can use the __________ clause.

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

Question 28

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

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

Question 29

What term refers to data that describes other data?

A) pseudodata
B) microdata
C) abstract data
D) metadata

Question 30

In SQL, which statement can be used to create a database table?

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

Question 31

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

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

Question 32

A qualified column name takes the form

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

Question 33

What is the default concurrency level of a ResultSet object?

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

Question 34

Which term refers to undoing changes to a database?

A) uncommit
B) reverse
C) rollback
D) undo

Question 35

In SQL, which statement is used to delete one or more rows from a table?

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

Question 36

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

A) secondary key
B) foreign key
C) referential key
D) meta key

Question 37

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

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

Question 38

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

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

Question 39

In SQL, which statement is used to delete a table from a database?

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

Question 40

Which statement is used in SQL to insert a new row into a table?

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