TAKE MySQL Developer 1z1-909 PRACTICE QUESTIONS FOR AMAZING RESULTS [Q25-Q41]

1z1-909 Oracle

admin • October 17, 2022

TAKE MySQL Developer 1z1-909 PRACTICE QUESTIONS FOR AMAZING RESULTS [Q25-Q41]

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TAKE MySQL Developer 1z1-909 PRACTICE QUESTIONS FOR AMAZING RESULTS

Oracle 1z1-909 Exam Dumps Are Essential To Get Good Marks

Oracle 1z1-909 Exam Syllabus Topics:

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

NEW QUESTION 25
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

Change DATE () to DAY ().

Change “O’Hagen” to ‘o’Hagen’.

Change date () to CURRENT_TIMESTAMP () .

Change ” NULL ” to NULL.

Change ” NULL ” to ‘ NULL ‘ .

Change “O’Hagen” to “O’Hagen”.

NEW QUESTION 26
Examine the structure of the emp table:

Examine the structure of the emp_vu1 view based on the emp table:

Now, examine this statement:
mysq1> INSERT INTO emp_vul VALUES (‘Alice’,20000) ;
What is true about executing the statement?

It inserts a row in the emp table.

It returns an error because an insert operation is not allowed on views.

It inserts a row in the view only.

It returns an error because the PRIMARY ACCOUNT column is not selected for the view definition.

NEW QUESTION 27
Examine these commands which execute successfully in the sequence shown in Sessions S1 and S2:

Now, examine this statement that execute successfully in s1:
S1> SELECT * FROM emp;
Which is true about the result of the select statement?

The inserted row is returned because the transaction is auto committed in S2.

The inserted row is not returned because the isolation level is READ COMMITTED in S2.

The inserted row is not returned because the transaction still active in s2.

The inserted row is returned because the isolation level is RPEATABLE READ in S1.

NEW QUESTION 28
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?

Disable TLS/SSL authentication.

Place this in the root directory of your shell account:
[mysqld] require__secure_transport=OFF

Use blank RSA or SSL certificates.

Upgrade the connector to a version that supports caching_sha2_password.

Change the user account to use mysql_native_password.

NEW QUESTION 29
Which two statements are true about AUTO_INCREMENT?

AUTO_INCREMENT values allocated to a transaction that is rolled back are not reused.

A table can have multiple AUTO_INCREMENT columns.

A server restart always resets the AUTO_INCREMENT value to largest value in the AUTO_INCREMENT column plus 1.

The decimal data type supports AUTO_INCREMENT.

An AUTO_INCREMENT column must be indexed.

NEW QUESTION 30
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?

The row will be updated immediately.

The statement will wait for the transaction in Session 1 to finish.

A deadlock will occur.

The transaction in Session 1 will be rolled back automatically.

NEW QUESTION 31
Which two are true about MySQL Document Store?

It helps to store data items in a schema-less key-value store.

It can store documents greater than 4 GB.

It depends heavily on strictly typed data.

It allows one to bypass the SQL layer of the server.

There is no access to relational tables.

NEW QUESTION 32
Which two differences exist between the timestamp and date time data types?

timestamp has larger range of values.

timestamp uses less storage space.

timestamp stores more decimal points in seconds

timestamp converts the value based on the session time zone.

timestamp stores the interval between two dates.

NEW QUESTION 33
Which two statements are true about aggregate functions?

SUM () returns o if there are no rows to aggregate.

MAX () returns null if there are no rows to aggregate.

COUNT (distinct) returns a count of the number of rows with different values including Null.

MIN () cannot use distinct when it executes as a Windows function.

AVG () does not allow use of the distinct option.

NEW QUESTION 34
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?

Session 1 takes a shared lock on all the rows in the band table.

Session 1 must commit before the update in Session 2 can complete.

Session 1 does not block Session 2.

Statements in Session 2 are committed.

Session 2 takes an exclusive lock on all the rows in the band table.

Session 2 does not start a transaction.

NEW QUESTION 35
Which statement is true about the show errors command?

It displays the total number of errors, warnings, and notes since the beginning of the current session.

It displays the total number of errors, warnings, and notes since the server last restarted.

It cannot display information for more than max_errot_count server system variable setting.

It displays errors messages only, since the start time of the current session.

It displays errors messages only, since the server last restarted.

It displays similar diagnostics results as get diagnostics.

NEW QUESTION 36
Examine these statements which execute successfully:

Which two changes will improve this query performance?

CREATE INDEX 1X7 ON users (user_name) USING HASH;

CREATE INDEX 1X4 ON Locations (site_id, loc_shared);

CREATE INDEX IX1 ON locations (loc_shareci) ;

CREATE INDEX 1X6 ON users (user_name);

CREATE INDEX 1X3 ON locations <loc_site_id) ;

CREATE INDEX 1X2 ON locations (loc_mapping) USING HASH; fH

CREATE INDEX 1X5 ON users (loc_id);

NEW QUESTION 37
Examine this bar graph based on columns from the players table:

Which two statements would generate this bar graph?

SELECT Name, Gender, Sport, REPEAT(‘# ‘Y GPA*10) AS GPA_Graph FROM players ORDER BY GPA DESC;

SELECT Name, Gender, Sport, LENGTH (GPA*10, ‘# ‘) AS GPA_Graph FROM players ORDER BY GPA DESC;

SELECT Name, Gender, Sport, CHAR_LENGTH (‘# ‘ GPA*10) AS GPA_Graph FROM players ORDER BY GPA DESC;

SELECT Name, Gender, Sport, RPAD (‘# ‘ GPA*10) AS GPA_Graph FROM players ORDER BY GPA DESC;

SELECT Name, Gender, Sport, CONCAT (‘# ‘ GPA*10) AS GPA_Graph FROM players ORDER BY GPA DESC;

NEW QUESTION 38
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?

The trigger activates after any row has been inserted into the table.

The trigger body set causes trigger activation.

The trigger activates after any row in the table has been updated.

Execution of an insert statement causes the trigger to activate.

NEW QUESTION 39
Examine this statement: