Jul-2023 Free Oracle 1z1-909 Exam Question Practice Exams
Ace 1z1-909 Certification with 66 Actual Questions
Oracle 1z1-909 is a certification exam for MySQL 8.0 Database Developers. It is designed to test the knowledge and skills of candidates in developing and managing databases using MySQL 8.0, which is one of the most popular open-source databases in the world. This exam is ideal for developers who want to showcase their expertise and proficiency in MySQL 8.0 database development.
The Oracle 1Z0-909 (MySQL 8.0 Database Developer) Certification Exam is a professional certification exam designed to test and validate the knowledge and skills of database developers working with MySQL 8.0. This exam is intended for those who have a strong understanding of database concepts and are seeking to demonstrate their expertise in designing, developing, and implementing MySQL 8.0 databases.
NEW QUESTION # 38
Examine this statement and output:
What causes the error?
- A. The set local_infile option has not been enabled.
- B. The database user does not have sufficient privilege.
- C. The database client process does not have sufficient privilege.
- D. The database server process does not have sufficient privilege.
- E. The database server is running in read-only mode.
- F. The engine is disabled.
Answer: D
NEW QUESTION # 39
Examine this bar graph based on columns from the players table:
Which two statements would generate this bar graph?
- A. SELECT Name, Gender, Sport, CONCAT ('# ' GPA*10) AS GPA_Graph FROM players ORDER BY GPA DESC;
- B. SELECT Name, Gender, Sport, REPEAT('# 'Y GPA*10) AS GPA_Graph FROM players ORDER BY GPA DESC;
- C. SELECT Name, Gender, Sport, RPAD ('# ' GPA*10) AS GPA_Graph FROM players ORDER BY GPA DESC;
- D. SELECT Name, Gender, Sport, LENGTH (GPA*10, '# ') AS GPA_Graph FROM players ORDER BY GPA DESC;
- E. SELECT Name, Gender, Sport, CHAR_LENGTH ('# ' GPA*10) AS GPA_Graph FROM players ORDER BY GPA DESC;
Answer: B,C
NEW QUESTION # 40
Examine these commands and output:
Which is true?
- A. It returns an error because the CREATE TABLE statement automatically recreated the view.
- B. It returns an error because the DROP TABLE statement did not drop the view.
- C. Existing emp_vuL is dropped and a new emp_vu1 created with the new definition.
- D. A new view is created because the previous was dropped on execution of the drop table statement.
Answer: C
NEW QUESTION # 41
Examine these my.cnf settings:
Examine this entry from /data/slow.log
Which option is also set in my.cnf?
- A. log_queries_not_using_indexes
- B. log__slow_admin_statements=1
- C. log_queries_not_using_indexes=ON
- D. log_throttle_queries_not_using_indexes=100
Answer: B
NEW QUESTION # 42
Which two statements are true about aggregate functions?
- A. COUNT (distinct) returns a count of the number of rows with different values including Null.
- B. MAX () returns null if there are no rows to aggregate.
- C. MIN () cannot use distinct when it executes as a Windows function.
- D. SUM () returns o if there are no rows to aggregate.
- E. AVG () does not allow use of the distinct option.
Answer: E
NEW QUESTION # 43
Examine these commands which execute successfully:
mYsql> CREATE TABLE income (acct_num INT, amount DECIMAL(10,2));
mysql> CREATE TRIGGER subtotal BEFORE INSERT ON income
FOR EACH ROW SET @subtotal = subtotal + NEW.amount;
Which is true for the income table?
- A. The trigger activates after any row in the table has been updated.
- B. The trigger activates after any row has been inserted into the table.
- C. Execution of an insert statement causes the trigger to activate.
- D. The trigger body set causes trigger activation.
Answer: C
NEW QUESTION # 44
Examine the employee table structure:
Which set of statements immediately returns empname for a given emp_id by using a parameterized prepare statement?
A)
D)
- A. Option A
- B. Option D
- C. Option C
- D. Option B
Answer: D
NEW QUESTION # 45
Your program which uses a MySQL connector receives this error:
Client does not support authentication protocol request by server
The account running the program uses caching_sha2_password.
Which two resolve this conflict?
- A. Change the user account to use mysql_native_password.
- B. Use blank RSA or SSL certificates.
- C. Disable TLS/SSL authentication.
- D. Place this in the root directory of your shell account:
[mysqld] require__secure_transport=OFF - E. Upgrade the connector to a version that supports caching_sha2_password.
Answer: A,E
NEW QUESTION # 46
Examine the statement which executes successfully:
SET sql_mode=' NO_ENGINE_SUBSTITTJTION' ;
You try to create a table with a storage engine that is not available. What will happen?
- A. An error occurs and the create table statement fails.
- B. The server will create the table but it will be unusable until the specified storage engine is available.
- C. The server will create the table using the default storage engine.
- D. The server will create the table but report an error when the first attempt to insert a row is performed.
Answer: A
NEW QUESTION # 47
Examine these statements issued from Session 1 which execute successfully:
Now, examine these statements issued from Session 2 which execute successfully:
Session 2>
BEGIN;
UPDATE band SET song=CONCAT ("Here Comes the ", song) WHERE song LIKE ' %Sun ; Which two are true?
- A. Session 2 does not start a transaction.
- B. Session 1 does not block Session 2.
- C. Session 1 takes a shared lock on all the rows in the band table.
- D. Session 2 takes an exclusive lock on all the rows in the band table.
- E. Statements in Session 2 are committed.
- F. Session 1 must commit before the update in Session 2 can complete.
Answer: E,F
NEW QUESTION # 48
Examine the contents of these tables:
Now examine the expected results for a user with privileges to access the table:
Which query returns the expected results?
A)
B)
C)
D)
- A. Option A
- B. Option D
- C. Option C
- D. Option B
Answer: D
NEW QUESTION # 49
Examine the appointments table definition which contains one million rows:
Now, examine this statement which executes successfully:
Which statement will improve query performance?
- A. ALTER TABLE appointments add index IX_4<attendant_id, payment, credit)
- B. ALTER TABLE appointments add index IX_3(attendant_id, created_by)
- C. ALTER TABLE appointments add index IX_2(attendant_session_id, created_by)
- D. ALTER TABLE appointments add index IX_1(credit,payment)
Answer: A
NEW QUESTION # 50
A server hosts MySQL Server and Apache Webserver supporting a PHP/PDO based application.
The application must be migrated from PHP to their Java application server on another host. The MySQL instance remains on the original host.
Examine the PDO connection string used in the existing application:
Mysql:host-localhost;dbname=sales;unix_socket=/var/run/mysql.sock
Which two prevent Java from using the Unix socket?
- A. The socket is not implemented in Connector/J driver.
- B. Java treats the socket file as insecure.
- C. The X Dev API protocol must be enabled to use sockets in Connector/J driver.
- D. socket is a reserved word in Java.
- E. The socket can only be accessed from the local host.
Answer: A,B
NEW QUESTION # 51
Examine the Test.php script which is numbered for clarity, and its output:
PHP Fatal error: Uncaught Error: call to underined function mysqli_connect () in Test.php:2 Which action will fix this error?
- A. Install the PHP executable in the path used by the MySQL installation.
- B. Replace line 2 With: Slink = mysql_xdevapi\getSession
("mysqlx://username:password@localhost:3306","schema"); - C. Enable the mysqli extension in the php.ini file.
- D. Replace line 2 with Slink = mysql.connect {"localhost: 3306n, "username", "pas "schema") ;
Answer: C
NEW QUESTION # 52
Examine this statement which executes successfully:
CREATE TABLE 'fshop' ('product' JSON DEFAULT NULL ) ENGINE=InnoDB;
Now, examine a json value contained in the table:
{"name" : "orange", "varieties" : [{"VarietyName":"Clementine", "Origin" : ["PA", "BU"] }, {"VarietyName": "tangerine", "Origin" : ["CH","JP"]>]> Which will cause documents to be indexed over the 'name' key?
- A. ALTER TABLE fshop ADD COLUMN name VARCHAR(20) AS (product-
>* S .varieties. VarietyName ' ) VIRTUAL, ADD KEY idx_name (name.) ; - B. ALTER TABLE fshop ADD COLUMN name VARCHAR(20) AS (product->' S - name' ) VIRTUAL, ADD KEY idx_name (name) ;
- C. ALTER TABLE fshop ADD COLUMN name VARCHAR(100) AS (product->' S - varieties' ) VIRTUAL, ADD KEY idx_name (name) ;
- D. ALTER TABLE fshop ADD name VARCHAR(20) AS (JSON_ONQUOTE (product->"S.varieties.VarietyName")), ADD INDEX (name);
- E. ALTER TABLE fshop ADD COLUMN name VARCHAR(20), ADD KEY idx_name (name) ;
Answer: C
NEW QUESTION # 53
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