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2018 Jan Oracle Official New Released 1z0-882
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Oracle Certified Professional, MySQL 5.6 Developer
Question No: 21
You have two tables: CREATE TABLE department (
Department_ID int unsigned NOT NULL auto_increment PRIMARY KEY, Department _Name varchar(12) NOT NULL
) ENGINE=InnoDB
CREATE TABLE employee (
Employee_Number int unsigned NOT NULL PRIMARY KEY, Employee_Name varchar(10) NOT NULL,
Department_ID int unsigned DEFAULT NULL,
FOREIGN KEY (Department ID) REFERENCES Department (Department_ID) ON UPDATE SET NULL ON DELETE CASCADE
) ENGINE= InnoDB
The tables have the data: Department
You execute the statement:
REPLACE INTO department (Department_ID, Department_Name) VALUES (1, ‘Admin’); What data is in the employee table after the statement?
-
Option A
-
Option B
-
Option C
-
Option D
Answer: C
Question No: 22
You want to query the VARCHAR column ‘ code’ values that match:
->Start with “p”
->End with “_”
->Contain more than 3 characters Assume that sql_mode is blank.
Which two queries select only those rows?
-
SELECT code FROM operations WHERE code LIKE “p%%_”;
-
SELECT code FROM operations WHERE code LIKE ” ‘%’%_’ “ESCAPE ” ‘ ”;
-
SELECT code FROM operations WHERE code LIKE “p%_\_”;
-
SELECT code FROM operations WHERE code LIKE “p_\%\_”;
-
SELECT code FROM operations WHERE code LIKE “p_%_%;_”ESCAPE “/”;
Answer: C,D
Question No: 23
You have been tasked to create a database that will store a list of all managers and the employees who report directly to them. The following is stipulated:
->No manage is managing more than three people.
->No employee can work for more than one manage.
Which of these designs represents a normalized schema that meets the project requirements?
-
CREATE TABLE ‘manager’ ‘manager’ varchar (50) DEFAULT NULL,
’employee2′ varchar (50) DEFAULT NULL, ’employee’ varchar (50) DEFAULT NULL,
UNIQUE ( ‘manager ‘, ’employee1′, ’employee2, ’employee3′)
)
-
CREATE TABLE ‘managers’ (
“id’ int(11) NOT NULL AUTO_INCREMENT,
‘manager’ varchar (50) DEFAULT NULL , PRIMARY KEY (‘id’)
)
CREATE TABLE “employees’ (
‘id’ int(11) NOT NULL AUTO _INCREMENT,
‘manager_id’ int(11) DEFAULT NULL, ’employee varchar (25) DEFAULT NULL, PRIMARY KEY (‘id’)
)
-
CREATE TABLE ‘manager’ ( ‘manager’ varchar (50) DEFAULT NULL,
’employee_list’varchar (150) DEFAULT NULL,
)
-
CREATE TABLE ‘message’ (
‘id’ int(11) NOT NULL AUTO_INCREMENT,
‘manager’ varchar(50) DEFAULT NULL, PRIMARY KEY (“id’)
)
CREATE TABLE ’employees’ (
‘id int (11) NOT NULL AUTO _INCREMENT,
‘ employees’ varchar(25) DEFAULT NULL,
)
Answer: A
Question No: 24
The people table contains the data as shown:
Which two statements return two rows each?
-
SELECT DISTINCT last_name, first_name FROM people
-
SELECT 1,2 FROM people GROUP BY last_name
-
SELECT first_name, last _name FROM people WHERE age LIKE ‘2’
-
SELECT 1, 2 FROM people WHERE last _name =’smith’
-
SELECT first _name, last_name FROM people LIMIT 1, 2
Answer: B,E
Question No: 25
Examine this table that contains over two million rows of data:
CREATE TABLE ‘news_feed’ (
.id’bigint (20) NOT NULL AUTO _INCREMENT,
.news _sources_id’varchar (11) NOT NULL,
.dataline’ datetime NOT NULL,
.headline’ varchar (256) NOT NULL,
.story’ text NOT NULL,.tag varchar (32768) DEFAULT NULL, PRIMARY KEY (‘id’)
KEY ‘dateline’ ( ‘dateline’)
)
Examine this query that returns 332 rows of date:
SELECT *
FROM news_feed
WHERE DATE(dateline)= ‘2013-01-01’
Which change would show the greatest improvement in the response time of the query?
-
Use the LIKE operator:
SELECT . . .WHERE dateline LIKE ‘2013-10-01amp;’
-
USE the DATEDIFF function:
SELECT . . . WHERE DATEDIFF (dateline, ‘2013-01-01’) = 0
-
Use numeric equivalents for comparing the two dates:
SELECT. . .WHERE MOD(UNIX_TIMESTAMP (dateline), 86400 =UNIX_TIMESTAMP (‘2013-01-01’)
-
Use a date range comparison:
SELECT . . . WHERE dateline gt;= ‘2013-01’ and dateline lt; ‘2013-01-02’
Answer: D
Question No: 26
Using the MYSQL command -line client you have received the error “Lost connection to MYSQL server query”
Which three are possible causes of the error?
-
The MYSQL server stopped working during query execution.
-
The network connection was interrupted during query execution.
-
The connection that issued the query was killed.
-
The client connection stayed idle for longer than interactive -timeout seconds and was closed.
-
The client sent an erroneous query to the server causing the connection to be closed.
-
The server interrupted client connection after max-connect-errors was achieved.
Answer: B,E,F
Question No: 27
A table (t1) contains 1000 random integer values in the first column (col1).The random values are in the range of 0-1000.
Examine this query:
SELECT col1 FROM t1 WHERE col1 lt;=100 UNION
SELECT col1 FROM t1 WHERE col1 gt;=900 ORDER BY col1 DESC
What is the expected output?
-
A list of all values, including duplicates, sorted in descending order in the ranges of 0- 100 and 900-1000
-
A list of all random unsorted values, including duplicates, in the range of 0-100 followed by the list of all values, including in the range of 900-1000 sorted in descending order
-
A list of unique random values in the range of 0-100 followed by the list of unique values in the range of 900-1000 sorted in descending order
-
A list of all unique values sorted in descending order within the ranges of 0-100 and 900- 1000
Answer: D
Explanation: https://dev.mysql.com/doc/refman/5.6/en/union.html
Question No: 28
Which three are valid identifiers for the user table in the mysq1 database?
-
myssq1. user
-
‘mysq1. user’
-
‘mysq1’. ‘user’
-
Mysq1. ‘user’
-
”mysq1. User”
Answer: A,C,D
Question No: 29
You have two tables: news_source and news_feed.
Here is some sample data from the news _feed table:
-
Option A
-
Option B
-
Option C
-
Option D
Answer: A
Question No: 30
Which two keywords cannot be used in multi-table deletes?
-
USING
-
ORDER BY
-
LIMIT
-
IGNORE
-
JOIN
Answer: B,C
Reference: http://dev.mysql.com/doc/refman/5.0/en/delete.html Explanation:
You can specify multiple tables in a DELETE statement to delete rows from one or more tables depending on the particular condition in the WHERE clause. However, you cannot use ORDER BY or LIMIT in a multiple-table DELETE.
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