final pt I 1. You are creating the EMPLOYEES table.
This table should contain the COMMISSION_PCT column and use a value of 10 percent if no commission value is provided when a record is inserted. Which line should you include in the CREATE TABLE statement to accomplish this task? Mark for Review (1) Points
commission_pct NUMBER(4,2) DEFAULT 0.10 (*)
commission_pct NUMBER(4,2) DEFAULT = 0.10
commission_pct NUMBER(4,2) DEFAULT (0.10)
commission_pct NUMBER(4,2) (DEFAULT, 0.10)
Correct
Correct
2. You want to create a table named TRAVEL that is a child of the EMPLOYEES table. Which of the following statements should you issue? Mark for Review (1) Points
CREATE TABLE travel (destination_id primary key, departure_date date, return_date date, emp_id REFERENCES employees (emp_id));
CREATE TABLE travel (destination_id number primary key, departure_date date, return_date date, t.emp_id = e.emp_id);
CREATE TABLE travel (destination_id number primary key, departure_date date, return_date date, JOIN emp_id number(10) ON employees (emp_id));
CREATE TABLE travel (destination_id number primary key, departure_date date, return_date date, emp_id number(10) REFERENCES employees (emp_id));
(*)
Correct
Correct
3. You want to create a database table that will contain information regarding products that your company released during 2001. Which name can you assign to the table that you create? Mark for Review (1) Points
2001_PRODUCTS
PRODUCTS_2001 (*)
PRODUCTS_(2001)
PRODUCTS--2001
Correct
Correct
4.
Evaluate this CREATE TABLE statement:
CREATE TABLE line_item ( line_item_id NUMBER(9), order_id NUMBER(9), product_id NUMBER(9));
You are a member of the SYSDBA role, but are not logged in as SYSDBA. You issue this CREATE TABLE statement. Which statement is true? Mark for Review (1) Points
You created the LINE_ITEM table in the public schema.
You created the LINE_ITEM table in the SYS schema.
You created the table in your schema. (*)
You created the table in the SYSDBA schema.
Correct
Correct
5. Which of the following SQL statements will create a table called Birthdays with three columns for storing employee number, name and date of birth? Mark for Review
(1) Points
CREATE table BIRTHDAYS (EMPNO, EMPNAME, BIRTHDATE);
CREATE table BIRTHDAYS (employee number, name, date of birth);
CREATE TABLE Birthdays (Empno NUMBER, Empname CHAR(20), Birthdate DATE); (*)
CREATE TABLE Birthdays (Empno NUMBER, Empname CHAR(20), Date of Birth DATE);
Correct
Correct
6. for Review (1) Points
Which statement about creating a table is true?
Mark
With a CREATE TABLE statement, a table will always be created in the current user's schema.
If no schema is explicitly included in a CREATE TABLE statement, the table is created in the current user's schema. (*)
If no schema is explicitly included in a CREATE TABLE statement, the CREATE TABLE statement will fail.
If a schema is explicitly included in a CREATE TABLE statement and the schema does not exist, it will be created.
Correct
Correct
7. Comments on tables and columns can be stored for documentation by: Mark for Review (1) Points
Embedding /* comment */ within the definition of the table.
Using the ALTER TABLE CREATE COMMENT syntax
Using the COMMENT ON TABLE or COMMENT on COLUMN (*)
Using an UPDATE statement on the USER_COMMENTS table
Correct
Correct
8.
Evaluate this statement:
ALTER TABLE inventory MODIFY backorder_amount NUMBER(8,2);
Which task will this statement accomplish? Mark for Review (1) Points
Alters the definition of the BACKORDER_AMOUNT column to NUMBER(8 2)
Alters the definition of the BACKORDER_AMOUNT column to NUMBER
Alters the definition of the BACKORDER_AMOUNT column to NUMBER(2,8)
Alters the definition of the BACKORDER_AMOUNT column to NUMBER(8.2)
Changes the definition of the BACKORDER_AMOUNT column to NUMBER(8,2) (*)
Correct
Correct
9.
Evaluate this statement:
ALTER TABLE employees SET UNUSED (fax);
Which task will this statement accomplish? Mark for Review (1) Points
Deletes the FAX column
Frees the disk space used by the data in the FAX column
Prevents data in the FAX column from being displayed, by performing a logical drop of the column. (*)
Prevents a new FAX column from being added to the EMPLOYEES table
Correct
Correct
10.
The TEAMS table contains these columns:
TEAM_ID NUMBER(4) Primary Key TEAM_NAME VARCHAR2(20) MGR_ID NUMBER(9)
The TEAMS table is currently empty. You need to allow users to include text characters in the manager identification values. Which statement should you use to implement this? Mark for Review (1) Points
ALTER teams MODIFY (mgr_id VARCHAR2(15));
ALTER TABLE teams MODIFY (mgr_id VARCHAR2(15));
(*)
ALTER TABLE teams REPLACE (mgr_id VARCHAR2(15));
ALTER teams TABLE MODIFY COLUMN (mgr_id VARCHAR2(15));
You CANNOT modify the data type of the MGR_ID column.
Correct 11.
Correct Mark for Review
Which statement about a column is NOT true?
(1) Points
You can increase the width of a CHAR column.
You can modify the data type of a column if the column contains nonnull data. (*)
You can convert a CHAR data type column to the VARCHAR2 data type.
You can convert a DATE date type column to a VARCHAR2 column.
Correct
Correct
12.
Evaluate the structure of the EMPLOYEE table:
EMPLOYEE_ID NUMBER(9) LAST_NAME VARCHAR2(25) FIRST_NAME VARCHAR2(25)
DEPARTMENT_ID NUMBER(9) MANAGER_ID NUMBER(9) SALARY NUMBER(7,2)
Which statement should you use to increase the LAST_NAME column length to 35 if the column currently contains 200 records? Mark for Review (1) Points
ALTER employee TABLE ALTER COLUMN (last_name VARCHAR2(35));
ALTER TABLE employee RENAME last_name VARCHAR2(35);
ALTER TABLE employee MODIFY (last_name VARCHAR2(35));
(*)
You CANNOT increase the width of the LAST_NAME column.
Incorrect
Incorrect. Refer to Section 8 Lesson 3.
13. You need to remove all the data in the SCHEDULE table, the structure of the table, and the indexes associated with the table. Which statement should you use? Mark for Review (1) Points
DROP TABLE (*)
TRUNCATE TABLE
ALTER TABLE
DELETE TABLE
Correct
Correct
14.
Examine the structure of the DONATIONS table.
DONATIONS: PLEDGE_ID NUMBER DONOR_ID NUMBER PLEDGE_DT DATE AMOUNT_PLEDGED NUMBER (7,2) AMOUNT_PAID NUMBER (7,2) PAYMENT_DT DATE
You need to reduce the precision of the AMOUNT_PLEDGED column to 5 with a scale of 2 and ensure that when inserting a row into the DONATIONS table without a value for the AMOUNT_PLEDGED column, a price of $10.00 will automatically be inserted. The DONATIONS table currently contains NO records. Which statement is true? Mark for Review (1) Points
You CANNOT decrease the width of the AMOUNT_PLEDGED column.
Both changes can be accomplished with one ALTER TABLE statement. (*)
You must drop and recreate the DONATIONS table to achieve these results.
You must use the ADD OR REPLACE option to achieve these results.
Correct
Correct
15. You need to truncate the EMPLOYEES table. The EMPLOYEES table is not in your schema. Which privilege must you have to truncate the table? Mark for Review (1) Points
The DROP ANY TABLE system privilege (*)
The TRUNCATE ANY TABLE system privilege
The CREATE ANY TABLE system privilege
The ALTER ANY TABLE system privilege
Correct
Correct
16. You want to issue the following command on a database that includes your company's inventory information: ALTER TABLE products SET UNUSED COLUMN color;
What will be the result of issuing this command? Mark for Review (1) Points
The column named COLOR in the table named PRODUCTS will be assigned default values.
The column named COLOR in the table named PRODUCTS will be created.
The column named COLOR in the table named PRODUCTS will be deleted.
The column named COLOR in the table named PRODUCTS will not be returned in subsequent reads of the table by Oracle, as is has been deleted logically. (*)
Correct
Correct
17.
Evaluate this statement:
TRUNCATE TABLE employees;
Which statement about this TRUNCATE TABLE statement is true? Mark for Review (1) Points
You can produce the same results by issuing the 'DROP TABLE employee' statement.
You can issue this statement to retain the structure of the employees table. (*)
You can reverse this statement by issuing the ROLLBACK statement.
You can produce the same results by issuing the 'DELETE employees' statement.
Correct
Correct
18. NUMBER(6,4)
The ELEMENTS column is defined as:
How many digits to the right of the decimal point are allowed for the ELEMENTS column? Mark for Review (1) Points
Zero
Two
Four (*)
Six
Correct
Correct
19. Review (1) Points
Which statement about data types is true?
Mark for
The BFILE data type stores character data up to four gigabytes in the database.
The TIMESTAMP data type is a character data type.
The VARCHAR2 data type should be used for fixed-length character data.
The CHAR data type requires that a maximum size be specified when defining a column of this type. (*)
Correct
Correct
20.
Evaluate this CREATE TABLE statement:
CREATE TABLE sales ( sales_id NUMBER(9), customer_id NUMBER(9), employee_id NUMBER(9), description VARCHAR2(30), sale_date TIMESTAMP WITH LOCAL TIME ZONE DEFAULT SYSDATE, sale_amount NUMBER(7,2));
Which business requirement will this statement accomplish? Mark for Review (1) Points
Sales identification values could be either numbers or characters, or a combination of both.
All employee identification values are only 6 digits so the column should be variable in length.
Description values can range from 0 to 30 characters so the column should be fixed in length.
Today's date should be used if no value is provided for the sale date. (*)
Correct 21.
Correct Mark for Review
The TIMESTAMP data type allows what?
(1) Points
Time to be stored as an interval of years and months.
Time to be stored as a date with fractional seconds. (*)
Time to be stored as an interval of days to hours, minutes and seconds.
None of the above.
Correct
Correct
22. A column that will be used to store binary data up to 4 Gigabyes in size should be defined as which datatype? Mark for Review
(1) Points
LONG
NUMBER
BLOB (*)
LONGRAW
Correct
Correct
23. You need to store the SEASONAL data in months and years. Which data type should you use? Mark for Review (1) Points
DATE
TIMESTAMP
INTERVAL YEAR TO MONTH (*)
INTERVAL DAY TO SECOND
Correct
Correct
24. You need to store the HIRE_DATE value with a time zone displacement value and allow data to be returned in the user's local session time zone. Which data type should you use? Mark for Review (1) Points
DATETIME
TIMESTAMP
TIMESTAMP WITH TIME ZONE
TIMESTAMP WITH LOCAL TIME ZONE (*)
Correct
Correct
Section 10
25.
Evaluate this CREATE TABLE statement:
1. CREATE TABLE part( 2. part_id NUMBER, 3. part_name VARCHAR2(25), 4. manufacturer_id NUMBER(9), 5. retail_price NUMBER(7,2) NOT NULL, 6. CONSTRAINT part_id_pk PRIMARY KEY(part_id), 7. CONSTRAINT cost_nn NOT NULL(cost), 8. CONSTRAINT FOREIGN KEY (manufacturer_id) REFERENCES manufacturer(id));
Which line will cause an error? Mark for Review (1) Points
7 (*)
Incorrect
Incorrect. Refer to Section 10 Lesson 2.
26. When creating the EMPLOYEES table, which clause could you use to ensure that salary values are 1000.00 or more? Mark for Review (1) Points
CONSTRAINT CHECK salary > 1000
CHECK CONSTRAINT (salary > 1000)
CONSTRAINT employee_salary_min CHECK salary > 1000
CONSTRAINT employee_salary_min CHECK (salary >= 1000) (*)
CHECK CONSTRAINT employee_salary_min (salary > 1000)
Correct
Correct
27. You need to create the PROJECT_HIST table. The table must meet these requirements:
1. The table must contain the EMPLOYEE_ID and TASKED_HOURS columns for numeric data. 2. The table must contain the START_DATE and END_DATE column for date values. 3. The table must contain the HOURLY_RATE and PROJECT_COST columns for numeric data with precision and scale of 5,2 and 10,2 respectively. 4. The table must have a composite primary key on the EMPLOYEE_ID and START_DATE columns.
Evaluate this CREATE TABLE statement:
CREATE TABLE project_hist ( employee_id NUMBER, start_date DATE, end_date DATE, tasked_hours NUMBER, hourly_rate NUMBER(5,2), project_cost NUMBER(10,2), CONSTRAINT project_hist_pk PRIMARY KEY(employee_id, start_date));
How many of the requirements does the CREATE TABLE statement satisfy? Mark for Review (1) Points
None of the four requirements
All four of the requirements (*)
Only three of the requirements
Only two of the requirements
Correct
Correct
28. You need to enforce a relationship between the LOC_ID column in the FACILITY table and the same column in the MANUFACTURER table. Which type of constraint should you define on the LOC_ID column? Mark for Review (1) Points
UNIQUE
NOT NULL
FOREIGN KEY (*)
PRIMARY KEY
Correct
Correct
29. Which of the following FOREIGN KEY Constraint keywords identifies the table and column in the parent table? Mark for Review (1) Points
RESEMBLES
ON DELETE CASCADE
REFERENTIAL
REFERENCES (*)
Correct
Correct
30. You need to create a composite primary key constraint on the EMPLOYEES table. Which statement is true? Mark for Review (1) Points
The PRIMARY KEY constraint must be defined at the table level. (*)
A PRIMARY KEY constraint must be defined for each column in the composite primary key.
The PRIMARY KEY constraint must be defined for the first column of the composite primary key.
The PRIMARY KEY constraint must be defined at the table level and for each column in the composite primary key.
Correct
Correct
31. Which clause could you use to ensure that cost values are greater than 1.00? Mark for Review (1) Points
CONSTRAINT CHECK cost > 1.00
CONSTRAINT part_cost_ck CHECK (cost > 1.00) (*)
CHECK CONSTRAINT part_cost_ck (cost > 1.00)
CONSTRAINT CHECK part_cost_ck (cost > 1.00)
Correct
Correct
32. Which statement about a FOREIGN KEY constraint is true? Mark for Review (1) Points
An index is automatically created for a FOREIGN KEY constraint.
A FOREIGN KEY constraint requires the constrained column to contain values that exist in the referenced Primary or Unique key column of the parent table. (*)
A FOREIGN KEY constraint allows that a list of allowed values be checked before a value can be added to the constrained column.
A FOREIGN KEY column can have a different data type from the
primary key column that it references.
Correct
Correct
33. What must exist on the Parent table before Oracle will allow you to create a FOREIGN KEY constraint from a Child table? Mark for Review (1) Points
A FOREIGN KEY constraint allows the constrained column to contain values that exist in the primary key column of the parent table.
A PRIMARY or UNIQUE KEY constraint must exist on the Parent table. (*)
An index must exist on the Parent table
A CHECK constraint must exist on the Parent table.
Correct
Correct
34.
Evaluate this statement
ALTER TABLE employees ENABLE CONSTRAINT emp_id_pk;
For which task would you issue this statement? Mark for Review (1) Points
To add a new constraint to the EMPLOYEES table
To disable an existing constraint on the EMPLOYEES table
To activate a new constraint while preventing the creation of a PRIMARY KEY index
To activate the previously disabled constraint on the EMPLOYEE_ID column while creating a PRIMARY KEY index (*)
Correct
Correct
35. tables.
Examine the structures of the PRODUCT and SUPPLIER
PRODUCT PRODUCT_ID NUMBER NOT NULL, PRIMARY KEY PRODUCT_NAME VARCHAR2 (25) SUPPLIER_ID NUMBER FOREIGH KEY to SUPPLIER_ID of the SUPPLIER table LIST_PRICE NUMBER (7,2) COST NUMBER (7,2) QTY_IN_STOCK NUMBER QTY_ON_ORDER NUMBER REORDER_LEVEL NUMBER REORDER_QTY NUMBER
SUPPLIER SUPPLIER_ID NUMBER NOT NULL, PRIMARY KEY SUPPLIER_NAME VARCHAR2 (25) ADDRESS VARCHAR2 (30) CITY VARCHAR2 (25) REGION VARCHAR2 (10) POSTAL_CODE VARCHAR2 (11)
Evaluate this statement:
ALTER TABLE suppliers DISABLE CONSTRAINT supplier_id_pk CASCADE;
For which task would you issue this statement? Mark for Review (1) Points
To remove all constraint references to SUPPLIERS table
To drop the FOREIGN KEY constraint on the PRODUCTS table
To remove all constraint references to the PRODUCTS table
To disable any dependent integrity constraints on the SUPPLIER_ID column in the PRODUCTS table
To disable any dependent integrity constraints on the SUPPLIER_ID column in the SUPPLIERS table (*)
Correct
Correct
36. You need to remove the EMP_FK_DEPT constraint from the EMPLOYEE table in your schema. Which statement should you use? Mark for Review (1) Points
DROP CONSTRAINT EMP_FK_DEPT FROM employees;
DELETE CONSTRAINT EMP_FK_DEPT FROM employees;
ALTER TABLE employees DROP CONSTRAINT EMP_FK_DEPT; (*)
ALTER TABLE employees REMOVE CONSTRAINT EMP_FK_DEPT;
Correct
Correct
37. You can view the columns used in a constraint defined for a specific table by looking at which data dictionary table? Mark for Review
(1) Points
USER_CONS_COLUMNS (*)
CONSTRAINTS_ALL_COLUMNS
SYS_DATA_DICT_COLUMNS
US_CON_SYS
Correct
Correct
38. You disabled the EMPLOYEE_ID_PK PRIMARY KEY constraint on the ID column in the EMPLOYEES table and imported 100 records. You need to enable the constraint and verify that the new and existing ID column values do not violate the PRIMARY KEY constraint. Evaluate this statement:
ALTER TABLE employees ENABLE employee_id_pk;
Which statement is true? Mark for Review (1) Points
The statement will achieve the desired result.
The statement will execute, but will ensure that the new ID values are unique.
The statement will execute, but will not verify that the existing values are unique.
The statement will NOT execute because it contains a syntax error. (*)
Correct
Correct
39.
This SQL command will do what?
ALTER TABLE employees ADD CONSTRAINT emp_manager_fk FOREIGN KEY(manager_id) REFERENCES
employees(employee_id); Mark for Review (1) Points
Alter the table employees and disable the emp_manager_fk constraint.
Add a FOREIGN KEY constraint to the EMPLOYEES table indicating that a manager must already be an employee. (*)
Add a FOREIGN KEY constraint to the EMPLOYEES table restricting manager ID to match every employee ID.
Alter table employees and add a FOREIGN KEY constraint that indicates each employee ID must be unique.
Correct
Correct
40.
The LINE_ITEM table contains these columns:
LINE_ITEM_ID NUMBER PRIMARY KEY
PRODUCT_ID NUMBER(9) FOREIGN KEY references the ID column of the PRODUCT table QUANTITY NUMBER(9) UNIT_PRICE NUMBER(5,2)
You need to disable the FOREIGN KEY constraint. Which statement should you use? Mark for Review (1) Points
ALTER TABLE line_item DISABLE CONSTRAINT product_id_fk;
(*)
ALTER TABLE line_item DROP CONSTRAINT product_id_fk;
ALTER TABLE line_item ENABLE CONSTRAINT product_id_fk;
ALTER TABLE line_item DELETE CONSTRAINT product_id_fk;
Correct
Correct
The PO_DETAILS table contains these columns:
PO_NUM NUMBER NOT NULL, Primary Key PO_LINE_ID NUMBER NOT NULL, Primary Key PRODUCT_ID NUMBER Foreign Key to PRODUCT_ID column of the PRODUCTS table QUANTITY NUMBER UNIT_PRICE NUMBER(5,2)
Evaluate this statement:
ALTER TABLE po_details DISABLE CONSTRAINT product_id_pk CASCADE;
For which task would you issue this statement? Mark for Review (1) Points
To create a new PRIMARY KEY constraint on the PO_NUM column
To drop and recreate the PRIMARY KEY constraint on the PO_NUM column
To disable the PRIMARY KEY and any FOREIGN KEY constraints that are dependent on the PO_NUM column (*)
To disable the constraint on the PO_NUM column while creating a PRIMARY KEY index
Correct
Correct
42. What actions can be performed on or with Constraints? Mark for Review (1) Points
Add, Drop, Enable, Disable, Cascade (*)
Add, Minus, Enable, Disable, Collapse
Add, Subtract, Enable, Cascade
Add, Drop, Disable, Disregard
Correct
Correct
43. Which statement should you use to add a FOREIGN KEY constraint to the DEPARTMENT_ID column in the EMPLOYEES table to refer to the DEPARTMENT_ID column in the DEPARTMENTS table? Mark for Review (1) Points
ALTER TABLE employees MODIFY COLUMN dept_id_fk FOREIGN KEY (department_id) REFERENCES departments(department_id);
ALTER TABLE employees ADD CONSTRAINT dept_id_fk FOREIGN KEY (department_id) REFERENCES departments(department_id);
(*)
ALTER TABLE employees ADD FOREIGN KEY CONSTRAINT dept_id_fk ON (department_id) REFERENCES departments(department_id);
ALTER TABLE employees ADD FOREIGN KEY departments(department_id) REFERENCES (department_id);
Correct
Correct
44. True or False? (1) Points
A table can only have one unique key constraint defined. Mark for Review
True
False (*)
Correct
Correct
45. You need to ensure that each value in the SEAT_ID column is unique or null. Which constraint should you define on the SEAT_ID column? Mark for Review (1) Points
CHECK
UNIQUE (*)
NOT NULL
PRIMARY KEY
Correct
Correct
46. Primary Key, Foreign Key, Unique Key and Check Constraints can be added at which two levels? (Choose two) Mark for Review (1) Points
(Choose all correct answers)
Null Field
Table (*)
Row
Dictionary
Column (*)
Correct
Correct
47. You need to add a NOT NULL constraint to the COST column in the PART table. Which statement should you use to complete this task? Mark for Review (1) Points
ALTER TABLE part MODIFY (cost part_cost_nn NOT NULL);
ALTER TABLE part MODIFY (cost CONSTRAINT part_cost_nn NOT NULL);
(*)
ALTER TABLE part MODIFY COLUMN (cost part_cost_nn NOT NULL);
ALTER TABLE part ADD (cost CONSTRAINT part_cost_nn NOT NULL);
Correct
Correct
48. You need to ensure that the LAST_NAME column only contains certain character values. No numbers or special characters are allowed. Which type of constraint should you define on the LAST_NAME column? Mark for Review (1) Points
CHECK (*)
UNIQUE
NOT NULL
PRIMARY KEY
Correct
Correct
49.
Evaluate this CREATE TABLE statement:
CREATE TABLE customers (customer_id NUMBER, customer_name VARCHAR2(25),  address VARCHAR2(25),  city VARCHAR2(25),  region VARCHAR2(25),  postal_code VARCHAR2(11),  CONSTRAINT customer_id_un UNIQUE(customer_id),  CONSTRAINT customer_name_nn NOT NULL(customer_name));
Why does this statement fail when executed? Mark for Review (1) Points
The NUMBER data types require precision values.
UNIQUE constraints must be defined at the column level.
The CREATE TABLE statement does NOT define a PRIMARY KEY.
NOT NULL constraints CANNOT be defined at the table level. (*)
Correct
Correct
50. What is the highest number of NOT NULL constraints you can have on a table? Mark for Review (1) Points
10
You can have as many NOT NULL constraints as you have columns in your table. (*)
Correct
Correct
