Question 1

Which of the following commands does Oracle Database not support?

Accepted Answer

Oracle Database does not support the "ON UPDATE CASCADE" clause for foreign keys, while it does support "ON DELETE CASCADE".

Question 2

Which of the following is a GUI tool for application development with Oracle Database?

Accepted Answer

The Oracle SQL Developer is a graphical user interface (GUI) tool for application development with Oracle Database. It provides a visual interface for creating, testing, and debugging SQL and PL/SQL code, as well as managing database objects and data. The Oracle Enterprise Manager Database Express and the Oracle Database Configuration Assistant are also GUI tools for managing and configuring the Oracle Database, but they are not specifically designed for application development. The Oracle SQL*Plus command utility program is a command-line tool for executing SQL and PL/SQL commands and scripts.

Question 3

Which of the following statements would cause Oracle Database to include a new column named C5,which is a two-digit whole number,to a table named T2?

Accepted Answer

To add a new column to a table, we use the ALTER TABLE command, and specify the table name, followed by the ADD COLUMN keywords, and the column name and data type. Therefore, the correct syntax to add a new column named C5, which is a two-digit whole number, to a table named T2 is:
ALTER TABLE T2 ADD C5 NUMBER(2);

Question 4

Which of the following tasks cannot be done using the Oracle SQL Developer GUI features?

Accepted Answer

Creating a new tablespace requires administrative privileges and cannot be done using SQL Developer GUI features. This task must be done using SQL commands through a DBA account. Task A, B, and C are all possible using SQL Developer GUI features.

Question 5

The Oracle Database PL/SQL statement used to define a set of PL/SQL statements is ________.

Accepted Answer

The "BEGIN" keyword in PL/SQL is used to start the executable section where a set of PL/SQL statements are defined. This section is enclosed between the "BEGIN" and "END;" keywords.

Question 6

The Oracle database PL/SQL statement used to test for a condition and then direct when blocks of code should be run depending on the outcome of the test is ________.

Accepted Answer

The IF...THEN...ELSE...END IF statement in PL/SQL allows for conditional branching based on a particular condition. It tests for a condition and directs which blocks of code should be run depending on the outcome of the test.

Question 7

Which of the following Oracle Database structures is a logical subdivision of an Oracle Database database instance that is used to group related tables,views,and other similar objects?

Accepted Answer

A tablespace is a logical subdivision of an Oracle Database database instance that is used to group related tables, views, and other similar objects. A namespace is a reserved area in a computer's memory where variables are stored. A filespace is a logical representation of disk space that defines where files are stored on a computer's file system. A dataspace does not exist in Oracle Database.

Question 8

The Oracle Database PL/SQL block structure begins with ________.

Accepted Answer

The Oracle Database PL/SQL block structure begins with the DECLARE section, where variables and constants are defined. This section is optional for anonymous blocks if no declarations are needed.

Question 9

The Oracle Database PL/SQL statement used to repeat a set of PL/SQL statements as long as some condition is true is ________.

Accepted Answer

The LOOP statement is used to repeat a set of PL/SQL statements as long as some condition is true.

Question 10

If T3 is a table with three columns C1,C2,and C3,where C1 is integer data,C2 is character data,and C3 is date data,which of the following would be the proper statement to have Oracle Database enter the date 02/10/03 into a row in table T3 while making sure that it is formatted correctly as shown?

Accepted Answer

The correct syntax for inserting a date into an Oracle Database table with a specific format is to use the TO_DATE function along with the INSERT INTO statement. The TO_DATE function converts a string to a date, using the format specified ('DD/MM/YY' in this case). Option D correctly uses both the INSERT INTO statement and the TO_DATE function to insert the date in the desired format.

Question 11

Which of the following is a tool for managing an existing Oracle Database database?

Accepted Answer

Oracle Enterprise Manager Database Express is a web-based tool specifically designed for managing Oracle Databases.

Question 12

The Oracle tool used to copy data into a database table from a spreadsheet is called the ________.

Accepted Answer

The Data Import Wizard is the tool specifically designed for importing data from a spreadsheet into an Oracle database table. The Spreadsheet Wizard does not exist in Oracle, while the Database Configuration Assistant and Enterprise Manager Database Express are not the correct tools for this task.

Question 13

One limitation of the Oracle Data Import Wizard is that it ________.

Accepted Answer

The Oracle Data Import Wizard does not allow the addition of a new primary key column during the import process. It only allows selecting an existing primary key column to match the data.

Question 14

If the SQL statement SELECT C1,C2,C3
FROM T4
WHERE C2 = 'Smith';
Is frequently executed,which column(s)should be considered for indexing based only on the statement itself?

Accepted Answer

Based on the statement, the WHERE clause is checking for a value in the C2 column. Therefore, indexing should be considered on the C2 column to improve the query's performance. Indexing other columns (C1 or C3) may not improve performance in this case.

Question 15

During the data import process in Oracle,if some of the spreadsheet cells in a column of the source data are empty,________.

Accepted Answer

If some cells in a column of the source data are empty, it means that the column allows null values. In Oracle, to allow a column to accept null values, the "Nullable" box must be checked in the data import wizard. Therefore, D is the correct choice.

Question 16

The GUI tool for creating a new index is the Oracle SQL Developer ________.

Accepted Answer

Oracle SQL Developer provides a GUI tool for creating a new index through its "Edit Table" table editor, where users can manage indexes among other table-related tasks.

Question 17

Which method returns the next value in a sequence?

Accepted Answer

The method "NextVal" is used to return the next value in a sequence, typically in database systems like Oracle.

Question 18

When creating tables,Oracle Database automatically converts the SQL standard data type "int" into ________.

Accepted Answer

Oracle Database automatically converts the SQL standard data type "int" into "number (38,0)". This is because the "number" data type in Oracle can store integers with up to 38 digits.

Question 19

The Oracle Database variant of SQL with additional procedural language components is ________.

Accepted Answer

PL/SQL (Procedural Language/Structured Query Language) is the procedural language extension for Oracle Database SQL. T-SQL is the procedural language extension for Microsoft SQL Server, My/SQL is a different database management system, and MS/SQL is not a valid option.

Question 20

Copying spreadsheet data into a database is part of a larger data warehousing process known as ________.

Accepted Answer

Extract, transform, and load (ETL) is a process that involves extracting data from various sources (such as spreadsheets), transforming the data to meet business needs, and then loading it into a data warehouse or other target system. This process is commonly used in data warehousing to consolidate and organize data from multiple sources for more effective analysis and reporting. The other options, import/export, spreadsheet conversion, and data verification may be components of the ETL process but do not fully describe the process.

Quiz 11: Managing Databases With Oracle Database