Download MySQL 5.6 Developer.1z0-882.TestKing.2020-01-24.60q.vcex

Vendor: Oracle
Exam Code: 1z0-882
Exam Name: MySQL 5.6 Developer
Date: Jan 24, 2020
File Size: 1 MB
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Demo Questions

Question 1
Which two functions can be used in a C program to retrieve information about warning? (Choose two.)
  1. mysql_info
  2. mysql_error
  3. mysql_warning_count
  4. mysql_errno
Correct answer: AB
Question 2
You wish to create a trigger on the ‘city’ table that will check the value of the ‘District’ field before any INSERT. The trigger needs to change it to” Unknown” for an empty string or NULL. 
CREATE TRIGGER City_bi 
BEFORE INSERT ON CITY 
FOR EACH ROW 
BEGIN 
IF OLD. District IS NULL OR OLD.District= . . 
THEN 
SET NEW.District=’Unknown’; 
END IF :
END;  
Does the CREATE TRIGGER statement accomplish this goal?
  1. Yes; the trigger works correctly.
  2. No; FOR EACH ROW is invalid syntax.
  3. No; the syntax should be CREATE TRIGGER city-bi ON city BEFORE INSERT….
  4. No; the OLD keyword cannot be used in an INSERT trigger.
Correct answer: A
Question 3
What are two ways in which normalizing your tables helps improve performance In MySQL?
  1. Smaller table sizes and row lengths improve sorting operations.
  2. Separate tables allow indexing more columns.
  3. Fewer nullable column improve index usage.
  4. Normalizing Improves the performance of innodb_file_per _table.
Correct answer: BC
Question 4
You have a transaction that queries a table at the beginning of the transaction and performs the same query later. 
Which two transaction isolation levels guarantee that you get the same results both times? (Choose two.)
  1. Repeatable read
  2. Read committed
  3. Read uncommitted
  4. Single user
  5. Serializable
Correct answer: AE
Explanation:
Reference: http://dev.mysql.com/doc/refman/5.0/en/commit.html
Reference: http://dev.mysql.com/doc/refman/5.0/en/commit.html
Question 5
Which three database objects have non-case-sensitive names on all operating system? (Choose three.)
  1. Table
  2. Column
  3. Index
  4. Stored procedure
  5. Trigger
Correct answer: BCD
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
Your application is running slow. 
Which two features provide information that help to identify problems? (Choose two.)
  1. The MYSQL error log
  2. The slow query log
  3. The performance schema
  4. The GET DIAGNOSTICS statement
Correct answer: BC
Question 8
Cormcctor/Net supports a decoupled database connection mode, where a database Connection is established only when needed. 
     
Choose three parts that are involved when working with decoupled data.
  1. OpenConnect.MySql, DataTTiread.MySql, CommandExecutor.MySql
  2. MySqlQueryBuIld, MySqlQuerytxer. MySq I Query Results
  3. DecoupODBCConn, DecoupMyScjlruiiimanrt, DecoupMySqlRetum
  4. DataSet, MySqlDataAdapter, MySql Command Builder
Correct answer: D
Explanation:
Reference: http://dev.mysql.com/doc/connector-net/en/connector-net-tutorials-data-adapter.html
Reference: http://dev.mysql.com/doc/connector-net/en/connector-net-tutorials-data-adapter.html
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.   
  2.   
  3.   
  4.   
Correct answer: C
Question 10
Which two code samples demonstrate valid methods for working with loops? (Choose two.)
  1. DECLARE I  INT DEFAULT 0; 
    Test_loop: LOOP
    SET i  =i  +1; 
    IF i> =5 THEN 
    LEAVE test_loop; 
    END  IF; 
    END LOOP test_loop;
  2. DECLARE i INT DEFAULT 0; 
    WHILE I < 5ITERATE 
    SET i = i  +1; 
    END WHILE;
  3. DECLARE i  INT DEFAULT 0; 
    WHILE i < 5 Do 
    SET  i = i + 1; 
    END WHILE;
  4. DECLARE i  INT DEFAULT 0; 
    Test _loop; LOOP 
    SET i =i +1; 
    IF i >=5 THEN LEAVE; 
    END IF; 
    END LOOP test_loop;
Correct answer: C
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