[Q14-Q35] Best Quality Oracle 1Z0-909 Exam Questions GuideTorrent Realistic Practice Exams [2023]

Best Quality Oracle 1Z0-909 Exam Questions GuideTorrent Realistic Practice Exams [2023]

Critical Information To MySQL 8.0 Database Developer Pass the First Time

Oracle 1Z0-909 Exam Syllabus Topics:

Topic	Details
Topic 1	Create and access a document store JSON and Document Store Store and process numeric data
Topic 2	Explain the programming constructs used in stored routines Choose between connectors for a given application
Topic 3	Schedule database operations Store and process temporal data
Topic 4	Explain application development with NoSQL and XDevAPI Handle and interpret errors and warnings
Topic 5	Create and execute stored routines MySQL Schema Objects and Data
Topic 6	Resolve consistency problems with isolation levels Set SQL Modes to change MySQL behavior
Topic 7	Rewrite queries for optimization Store and process string data
Topic 8	Store and process spatial data Design, create, and alter views
Topic 9	Demonstrate connector use, management and configuration Secure credentials and connections
Topic 10	Use MySQL Shell to access document stores Retrieve data from the database by using a connector
Topic 11	Understand locking mechanisms within MySQL Control transactions in applications

NEW QUESTION 14
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(100) AS (product->' S - varieties' ) VIRTUAL, ADD KEY idx_name (name) ;
B. ALTER TABLE fshop ADD COLUMN name VARCHAR(20), ADD KEY idx_name (name) ;
C. ALTER TABLE fshop ADD COLUMN name VARCHAR(20) AS (product-
>* S .varieties. VarietyName ' ) VIRTUAL, ADD KEY idx_name (name.) ;
D. ALTER TABLE fshop ADD COLUMN name VARCHAR(20) AS (product->' S - name' ) VIRTUAL, ADD KEY idx_name (name) ;
E. ALTER TABLE fshop ADD name VARCHAR(20) AS (JSON_ONQUOTE (product->"S.varieties.VarietyName")), ADD INDEX (name);

Answer: A

NEW QUESTION 15
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 16
Examine these statements which execute successfully:

The statements executed without exception. Which two are true?

A. No row is inserted into band.
B. The transaction is rolled back to the savepoint.
C. No transaction commits.
D. One row is inserted into band.
E. Two transactions commit.

Answer: C,D

NEW QUESTION 17
You must write a statement that combines the first_name and last_name columns from the employees table as "last_name, first_name." Which two statements will do this?

A. SELECT last_name, ' , ',first_name FROM employees;
B. SELECT CONCAT_WS(', ',last_name,first_name) FROM employees;
C. SELECT CONCAT(last name,', ',first_name) FROM employees;
D. SELECT last_name + ', ' + first_name FROM employees;
E. SELECT GROUP_CONCAT(last_name, first_name) FROM employees;

Answer: B,C

NEW QUESTION 18
Your session has sqi_mode set to default.
Examine this statement which executes successfully:

Now examine this statement:

Which two changes are required to the insert statement so that it inserts the correct data?
* std_id = 10301
* firstname = Mary
* lastname = O'Hagen
* birthdate = November 26, 1997
* reg_date = the current date

A. Change date () to CURRENT_TIMESTAMP () .
B. Change " NULL " to ' NULL ' .
C. Change DATE () to DAY ().
D. Change "O'Hagen" to "O\'Hagen".
E. Change " NULL " to NULL.
F. Change "O'Hagen" to 'o\'Hagen'.

Answer: C,E

NEW QUESTION 19
Examine the output:

Which explain command will obtain the output?

A. EXPLAIN PORMAT^TRADITIONAL
B. EXPLAIN FORMAT=TREE
C. EXPLAIN PARTITIONS
D. EXPLAIN PORMAT=JSON
E. EXPLAIN ANALYZE

Answer: C

NEW QUESTION 20
Which select statement returns true?

A. SELECT NULL <> NULL;
B. SELECT NULL := NULL;
C. SELECT NULL = NULL;
D. SELECT NULL <=> NULL;

Answer: B

NEW QUESTION 21
How does InnoDB choose deadlock victims in MySQL?

A. It chooses the transaction with the most accumulated CPU time.
B. It chooses the transaction randomly.
C. It chooses the transaction with the least accumulated CPU time.
D. It chooses the transaction with the most modified rows.
E. It chooses the transaction with the lowest transaction ID.
F. It chooses the transaction with the fewest modified rows.

Answer: B

NEW QUESTION 22
Examine these statements which execute successfully:

Now, examine this query:

What is the result?

A. It inserts a row with an error.
B. It inserts a row with a warning.
C. It inserts a row with no error or warning.
D. It fails with a warning.
E. It fails with an error.

Answer: C

NEW QUESTION 23
Which two statements are true about AUTO_INCREMENT?

A. A server restart always resets the AUTO_INCREMENT value to largest value in the AUTO_INCREMENT column plus 1.
B. AUTO_INCREMENT values allocated to a transaction that is rolled back are not reused.
C. A table can have multiple AUTO_INCREMENT columns.
D. An AUTO_INCREMENT column must be indexed.
E. The decimal data type supports AUTO_INCREMENT.

Answer: A,E

NEW QUESTION 24
Examine these commands and output:

Which is true about the execution of the insert statement?

A. It inserts a new row in the view only.
B. It inserts a row in the view and base table.
C. It inserts a new row in the base table only.
D. It returns an error.

Answer: A

NEW QUESTION 25
Which two are true about MySQL Document Store?

A. It depends heavily on strictly typed data.
B. It helps to store data items in a schema-less key-value store.
C. There is no access to relational tables.
D. It allows one to bypass the SQL layer of the server.
E. It can store documents greater than 4 GB.

Answer: B,D

NEW QUESTION 26
Examine this statement and output:

You execute this statement:
SELECT JSON_SEARCH(product,'one','IT') FROM fshop ;
What is the output?

A. product->''$.varieties [4]. origin[1];;
B. ''$.varieties[4]. origin[1]''
C. ''$.varieties [3]. origin[0]''
D. product->varieties[3]. origin[0]''

Answer: A

NEW QUESTION 27
You are using buffered queries with PHP mysqli in a browser-based web application. Which three are true?

A. Buffered queries are enabled by default.
B. Buffered queries must be explicitly enabled using mysqliuseresult.
C. Buffered queries should be used on large tables when the result size is unknown.
D. Large results can have a negative impact on performance.
E. Results are sent from the server to the browser for buffering.
F. Additional queries on the same session are blocked until the result set is released.
G. Results are sent to the calling PHP process for buffering.

Answer: B,C,D

NEW QUESTION 28
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 B
D. Option C

Answer: A

NEW QUESTION 29
Examine this SQL statement:

A. db.country. fields ( [ 'Name ' , 'Population* ] ) .where ( 'Name LIKE "United%',,) -select ()-limit(5)
B. db . country, select ( [ ' Name LIKE "united%" ' , ' Population>^0 ' ] ) - limit (5)
C. db . country. Select ([Name' , 'Population.'] ) -limit (5) .where('Name LIKE "United%"')
D. db. country-select(['Name','Population']) .where('Name LIKE :param') -bind ('param' , 'United*') -limit(5)
E. db . country. fields ( [ ' Name ' , 'Population']) . select (' limit=5 ' ) .where('Name LIKE "United%" ' )

Answer: D

NEW QUESTION 30
Which two are true about indexes?

A. Indexes contain rows sorted by key values.
B. Indexes are used to enforce unique constraints.
C. Secondary index access will always be faster than a table scan.
D. Indexing all of a table's columns improves performance.
E. Indexes reduce disk space used.

Answer: D,E

NEW QUESTION 31
Examine this statement that execute successfully in an interactive session:

The user running this session now goes to lunch for an hour.
Now, examine these statements executed independently in separate sessions while Session 0 is still active:

How many of them will complete while Session 0 is still active?

A. 0
B. 1
C. 2
D. 3
E. 4
F. 5

Answer: E

NEW QUESTION 32
Which two are true about MySQL connectors?

A. Connector/NET runs on the Windows platform only.
B. Connector/J is based on Connector/C.
C. Connector/Python is released in precompiled binary and source code.
D. Connector/ODBC is available on Unix, Windows, and MacOS X.
E. Connectors must be installed on both the client and server hosts.

Answer: B,E

NEW QUESTION 33
Examine the content of the employee table:

Now examine this PHP script:

Finally examine this desired output:

A. $options = [PDO:: ATTR_DEFAOLT_FETCH__MODE => PDO : : FETCH_BOTH] ;
B. $options = [PDO:: ATTR_DEFAULT_FETCH__MODE => PDO: : FETCH_ASSOC] ;
C. $options = [PDO:: ATTR__DEFAULT_FETCH MODE => PDO: :FETCH_CLASS] ;
D. $options = [PDO:: ATTR_DEFAUXT_FETCH__MODE => PDO: : PDO: :FETCH_OBJ] ;

Answer: A

NEW QUESTION 34
Examine these statements issued from Session 1 which execute successfully:

Now, examine this statement issued from Session 2:

What is the outcome of the update statement in Session 2?