Database Programming Section 13 Quiz - Oracle iLearning

Database Programming Section 13 Quiz - Oracle iLearning

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Section 13 Quiz
(Answer all questions in this section)

1. 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


You CANNOT increase the width of the LAST_NAME column.


ALTER TABLE employee
MODIFY (last_name VARCHAR2(35));
(*)



ALTER employee TABLE
ALTER COLUMN (last_name VARCHAR2(35));


ALTER TABLE employee
RENAME last_name VARCHAR2(35);



2. The PLAYERS table contains these columns:
PLAYER_ID NUMBER(9) PRIMARY KEY
LAST_NAME VARCHAR2(20)
FIRST_NAME VARCHAR2(20)
TEAM_ID NUMBER(4)
SALARY NUMBER(9,2)

Which statement should you use to decrease the width of the FIRST_NAME column to 10 if the column currently contains 1500 records, but none are longer than 10 bytes or characters?

 Mark for Review
(1) Points


ALTER TABLE players
MODIFY (first_name VARCHAR2(10));
(*)


ALTER TABLE players
RENAME first_name VARCHAR2(10);


ALTER players TABLE
MODIFY COLUMN (first_name VARCHAR2(10));


ALTER players TABLE
MODIFY COLUMN first_name VARCHAR2(10);


3. You can use DROP COLUMN to drop all columns in a table, leaving a table structure with no columns. True or False? Mark for Review
(1) Points


True


False (*)



4. Comments can be added to a table by using the COMMENT ON TABLE statement. The comments being added are enclosed in: Mark for Review
(1) Points


Brackets { }


Single quotes ' ' (*)


Parentheses ( )


Double quotes " "



5. Comments on tables and columns can be stored for documentation by: Mark for Review
(1) Points


Using the ALTER TABLE CREATE COMMENT syntax


Embedding /* comment */ within the definition of the table.


Using an UPDATE statement on the USER_COMMENTS table


Using the COMMENT ON TABLE or COMMENT on COLUMN (*)
(Answer all questions in this section)

6. The BLOB datatype can max hold 128 Terabytes of data. True or False? Mark for Review
(1) Points


True (*)


False



7. Which data types stores variable-length character data? Select two. Mark for Review
(1) Points

(Choose all correct answers)


NCHAR


CHAR


CLOB (*)


VARCHAR2 (*)



8. A table has a column: RESPONSE_TIME. This is used to store the difference between the time the problem was reported and the time the problem was resolved. Data in the RESPONSE_TIME column needs to be stored in days, hours, minutes and seconds. Which data type should you use? Mark for Review
(1) Points


INTERVAL DAY TO SECOND (*)


DATETIME


TIMESTAMP


INTERVAL YEAR TO MONTH



9. The SPEED_TIME column should store a fractional second value.
Which data type should you use?

 Mark for Review
(1) Points


DATE


INTERVAL DAY TO SECOND


DATETIME


TIMESTAMP (*)


10. To store large amounts of text you should simply create a series of VARCHAR2 columns in a table. True or False? Mark for Review
(1) Points


True


False (*)
(Answer all questions in this section)

11. Which statement about creating a table is true? Mark for Review
(1) Points


If a schema is explicitly included in a CREATE TABLE statement and the schema does not exist, it will be created.


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 CREATE TABLE statement will fail.


If no schema is explicitly included in a CREATE TABLE statement, the table is created in the current user's schema. (*)



12. It is possible to create a table by using the CREATE TABLE command in conjunction with a subquery. True or False? Mark for Review
(1) Points


True (*)


False



13. Given this employee table:
(employee_id NUMBER(10) NOT NULL,
first_name VARCHAR2(25) NOT NULL,
last_name VARCHAR2(30) NOT NULL,
hire_date DATE DEFAULT sysdate)

What will be the result in the hire_date column following this insert statement:

INSERT INTO employees VALUES (10, 'Natacha', 'Hansen', DEFAULT);

 Mark for Review
(1) Points


The column for hire_date will be null.


Statement will fail, as you must list the columns into which you are inserting.


The character string SYSDATE.


Statement will work and the hire_date column will have the value of the date when the statement was run. (*)




14. Which column name is valid? Mark for Review
(1) Points


1NUMBER


NUMBER


NUMBER_1$ (*)


1_NUMBER#


15. Which SQL statement below will correctly create the EMP table based on the structure of the EMPLOYEES table? Include only the EMPLOYEE_ID, FIRST_NAME, LAST_NAME, SALARY, and DEPARTMENT_ID columns. Mark for Review
(1) Points


CREATE TABLE employee
AS SELECT employee_id, first_name, last_name, salary, department_id
FROM employees;


CREATE TABLE emp
SELECT (employee_id, first_name, last_name, salary, department_id FROM employees);


CREATE TABLE emp (employee_id, first_name, last_name, salary, department_id);


CREATE TABLE emp
AS SELECT employee_id, first_name, last_name, salary, department_id
FROM employees;
(*)


Oracle Ilearning for Database Design


Pelajar yang menyelesaikan Desain & Pemrograman Database Oracle Academy dengan kursus SQL dapat sebagai gantinya (atau juga) memilih untuk mempersiapkan dan mengikuti ujian sertifikasi SQL Server SQL Expert. Namun, ujian Oracle Database SQL Expert berisi topik tambahan yang akan membutuhkan lebih banyak belajar mandiri dan berlatih sendiri untuk mempersiapkan.



Membutuhkan penyelesaian yang berhasil sebelum Ujian Sertifikasi Oracle Database SQL Expert, Pengantar Oracle Ujian Sertifikasi SQL, atau Oracle Database : Ujian Sertifikasi SQL Fundamentals.



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Pembahasan didalam Oracle Ilearning - Oracle Academy



  • Oracle Ilearning for Database Design

  • Oracle Ilearning for Course Resources

  • Oracle Ilearning for Introduction

  • Oracle Ilearning for Entities and Attributes

  • Oracle Ilearning for Relationship Basics

  • Oracle Ilearning for Super/Sub Types and Business Rules

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  • Oracle Ilearning for Arcs, Hierarchies, and Recursive Modeling

  • Oracle Ilearning for Changes and Historical Modeling

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  • Oracle Ilearning for Creating Database Projects

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  • Oracle Ilearning quiz answers for Database Design English Quizzes and Exams

  • Oracle Ilearning quiz answers for Database Design Midterm Exam

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