Download MySQL 5.6 Developer.1z0-882.ExamsKey.2018-11-28.59q.vcex

Vendor: Oracle
Exam Code: 1z0-882
Exam Name: MySQL 5.6 Developer
Date: Nov 28, 2018
File Size: 3 MB
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Demo Questions

Question 1
You try to add a foreign key to the InnoDB table employees:
Mysq1> ALTER TABLE employees ADD FOREIGN KEY (Department_ID) REFERENCES departments (Department_ID); 
ERROR 1215 (HY000): cannot add foreign key constraint
Which command will provide additional information about the error? 
  1. SHOW ERRORS
  2. Error 1215
  3. SHOW ENGINE INNODB STATUS
  4. SELECT FROM information_schema.INNODB_SYS_FOREIGN
Correct answer: A
Explanation:
Reference: http://zeering.com/LoadAnswers.aspx?q=Foreign%20Key%20constraint (see update)
Reference: http://zeering.com/LoadAnswers.aspx?q=Foreign%20Key%20constraint (see update)
Question 2
Identity two ways to configure a PHP application to use the UTF8 character set.
  1. mysqli: :query (‘’SET NAMES utfs’’);
  2. mysqli : :set_charset (‘utf8’)
  3. spdo = new PDO (‘’mysql:host=localhost;dbname=test;charset=utfs’’, user’’, ‘’pass’’);
  4. PDO: :set_charset(‘’utf8’’)
Correct answer: B
Explanation:
Reference: http://stackoverflow.com/questions/5842980/a-permanent-way-of-doing-mysqli-set-charset
Reference: http://stackoverflow.com/questions/5842980/a-permanent-way-of-doing-mysqli-set-charset
Question 3
The data from t1 table is:
  
Assuming You want to see this output: 
  
Which query achieves the preceding result?
  1. SELECT name FROM t1 WHERE name LIKE ,_e%
  2. SELECT name FROM t1 WHERE name LIKE,e%.;
  3. SELECT name FROM t1 GROUP BY name ORDER by name LIMIT 1,1;
  4. SELECT name FROM t1 GROUP BY name HAVING sun ( marks)=176 ORDER BY name;
Correct answer: C
Explanation:
Question 4
Which three database objects have non-case-sensitive names on all operating system?
  1. Table
  2. Column
  3. Index
  4. Stored procedure
  5. Trigger
Correct answer: ABC
Question 5
Which three connector/J connection strings can be used to connect to the MYSQL server?
  1. Jdbc:mysq1://localhost/test?user =xxx&password=xxx
  2. Jdbc :mysqli://localhost/test?user=xxx&password=xxx
  3. Jdbc :mysql:replication://master,slave1.slave2. /test?user=xxx&password=xxx
  4. Jdbc:mysql:proxy://localhost/test?user=xxx&password=xxx
  5. Jdbc :mysql:loadbalance://master.slave1,slave2/test?user=xxx&password=xxx
Correct answer: ACE
Question 6
In the office table, the city column is structured as shown:
Mysql> show columns from office like ‘city’\G 
---------------------------------------------------1. row ---------------------__________________ 
Field: city
Type: enum(‘paris’.’Amsterdam’.’New York’.’Tokyo’)
Null: Yes
Key:
Default:NULL
Extra:
Consider the output of the SELECT query executed on the office table:
Mysql> SELECT DISTINCT city FROM office ORDER BY city:
  
If the query is written as:
SELECT  DISTINCT  city FROM office ORDER BY CAST(city AS CHAR) 
In what order are the rows returned?
  1. Paris, Amsterdam. New York, Tokyo
  2. Tokyo, New York, Amsterdam, Paris
  3. Amsterdam, New York, Paris, Tokyo
  4. Tokyo, Paris, New York, Amsterdam
Correct answer: C
Question 7
In MYSQL 5.6 you have the table t1:
CREATE TABLE t1 ( 
id int unsigned NOT NULL PRIMARY key) ENGINE = InnoDB; 
There are two connections to the server. They execute in this order:
Connection 1> SET  TRANSACTION ISOLATION LEVEL REPEATABLE READ; 
Connection 1> START  TRANSACTION; 
Connection 1> SELECT * FROM t1 WHERE id =1; 
Connection 2> TRUNCATE TABLE  t1; 
What happens to the TRUNCATE TABLE command in connection 2?
  1. It immediately proceeds and causes an implicit commit of the transaction in connection1.
  2. It runs concurrently with the transaction in connection 1 as each connection has its own view of the data in the t1 table.
  3. It blocks waiting for a metadata lock until the transaction in connection 1 ends.
  4. It blocks waiting for a table lock until the transaction in connection 1 ends.
Correct answer: C
Question 8
Your application is running slow. 
Which two features provide information that help to identify problems? 
  1. The MYSQL error log
  2. The slow query log
  3. The performance schema
  4. The GET DIAGNOSTICS statement
Correct answer: BC
Question 9
You have two test tables:
  • Code_innodb as InnoDB engine 
  • Code_ myisam as MYISAM engine 
The tables have the same structure:
  
The tables have one row of data:
  
You execute an INSERT statement on both code_myisam tables and receive duplicate key errors:
mysql> INSERT  INTO code_innodb VALUES (1, ‘Alpha’), (2, ‘Beta’), (3, ‘charlie,),(4, ‘Delta’); 
ERROR 1062 (23000): Duplicate entry ‘3’ for key ‘PRIMARY’
Mysql> INSERT INTO code_myisam VALUES (1, ‘Alpha’), (2, ‘Beta’), (3, ‘charlie’), 
(4, ‘Delta’); 
ERROR 1062 (23000); Duplicate entry ‘3’ for key ‘PRIMARY’ 
What is the expected output of the SELECT statements? 
  
  1. Option A
  2. Option B
  3. Option C
  4. Option D
Correct answer: A
Explanation:
Question 10
A complex query consists of eight populated tables that are all connected via INNER JOIN operands as shown: 
  
You modify the query and replace the SELECT operand with SELECT  STRAIGHT JOIN. 
What is the effect of adding STRAIGHT JOINs to the query?
  1. The optimizer processes only the JOINs in the sequence listed in the query.
  2. The optimizer will only JOIN the tables by using their PRIMARY KEYS or UNIQUE constraints.
  3. The optimizer will only JOIN the tables in sequence from smallest to largest.
  4. The optimizer ignores all terms in the WHERE clause until all JOINs have been completed.
Correct answer: A
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