(2023) 1z1-909 Dumps and Practice Test (66 Questions)
Guide (New 2023) Actual Oracle 1z1-909 Exam Questions
NEW QUESTION # 16
Examine the layout of the my_values table.
Examine the data in the my_value3 table.
Examine this statement:
A)
B)
D)
- A. Option A
- B. Option D
- C. Option C
- D. Option B
Answer: D
NEW QUESTION # 17
The employee table includes these columns:
e_id INT, e_name VARCHAR (45), dept_id INT salart INT
You must create a stored function, getMaxSalary(), which returns the maximum salary paid for a given department id.
Which statement will create the function?
- A.
- B.
- C.
- D.
Answer: B
NEW QUESTION # 18
The continent column in the country table contains no null values.
Examine this output:
A)
B)
C)
D)
- A. Option B
- B. Option D
- C. Option C
- D. Option A
Answer: D
NEW QUESTION # 19
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?
- A. The inserted row is returned because the transaction is auto committed in S2.
- B. The inserted row is not returned because the transaction still active in s2.
- C. The inserted row is returned because the isolation level is RPEATABLE READ in S1.
- D. The inserted row is not returned because the isolation level is READ COMMITTED in S2.
Answer: A
NEW QUESTION # 20
Which two statements are true about AUTO_INCREMENT?
- A. A table can have multiple AUTO_INCREMENT columns.
- B. The decimal data type supports AUTO_INCREMENT.
- C. AUTO_INCREMENT values allocated to a transaction that is rolled back are not reused.
- D. A server restart always resets the AUTO_INCREMENT value to largest value in the AUTO_INCREMENT column plus 1.
- E. An AUTO_INCREMENT column must be indexed.
Answer: B,D
NEW QUESTION # 21
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. The server will create the table using the default storage engine.
- B. The server will create the table but report an error when the first attempt to insert a row is performed.
- C. An error occurs and the create table statement fails.
- D. The server will create the table but it will be unusable until the specified storage engine is available.
Answer: C
NEW QUESTION # 22
Examine this statement which has executed successfully:
- A. Execution performance can be improved by using like instead of RLIKE.
- B. No index will improve statement performance.
- C. The statement takes advantage of index description_idx.
- D. Execution performance can be improved by, using a composite index with column description as the leftmost prefix column description.
- E. Execution performance can be improved by adding an index on column description.
Answer: D
NEW QUESTION # 23
Which two are true about indexes?
- A. Indexes reduce disk space used.
- B. Indexes contain rows sorted by key values.
- C. Indexes are used to enforce unique constraints.
- D. Secondary index access will always be faster than a table scan.
- E. Indexing all of a table's columns improves performance.
Answer: A,E
NEW QUESTION # 24
Examine these statements:
SET collation_connection=utf8mb4_0900_as_cs;
SELECT STRCMPCAlice', UCASE ('Alice* )) ;
What is displayed?
- A. 0
- B. 1
- C. ERROR: 1267 (HYOOO): Illegal mix of collations
- D. NULL
- E. 2
Answer: D
NEW QUESTION # 25
Examine this statement and output:
CREATE TABLE geom (g GEOMETRY NOT NOLL, SPATIAL INDEX(g) ) ; Query OK, 0 rows affected, 1 warning (0.01 sec) An attempt is made to add an SRID attribute to the column using the statement:
ALTER TABLE geom MODIFY COLUMN g geometry NOT NULL SRID 0;
Which is true?
- A. An error is generated because srid o is an invalid identifier value.
- B. An error is generated because the index prevents changes to the column.
- C. Execution succeeds and allows the use of the index by the optimizer.
- D. Execution succeeds with a warning.
Answer: B
NEW QUESTION # 26
Examine this statement:
DECLARE not_found CONDITION FOR SQLSTATE '02000';
In which two statements can not found be used?
- A. in a signal statement
- B. in an if statement
- C. in a leave statement to exit a loop
- D. in a while loop
- E. in a handler declaration
Answer: A,D
NEW QUESTION # 27
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 # 28
Which two are true about MySQL Document Store?
- A. It depends heavily on strictly typed data.
- B. There is no access to relational tables.
- C. It can store documents greater than 4 GB.
- D. It allows one to bypass the SQL layer of the server.
- E. It helps to store data items in a schema-less key-value store.
Answer: D,E
NEW QUESTION # 29
Which two are true about MySQL connectors?
- A. Connector/NET runs on the Windows platform only.
- B. Connector/Python is released in precompiled binary and source code.
- C. Connector/J is based on Connector/C.
- D. Connector/ODBC is available on Unix, Windows, and MacOS X.
- E. Connectors must be installed on both the client and server hosts.
Answer: C,E
NEW QUESTION # 30
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_queries_not_using_indexes=ON
- C. log_throttle_queries_not_using_indexes=100
- D. log__slow_admin_statements=1
Answer: D
NEW QUESTION # 31
Examine these statements which execute successfully:
Which two changes will improve this query performance?
- A. CREATE INDEX 1X4 ON Locations (site_id, loc_shared);
- B. CREATE INDEX 1X5 ON users (loc_id);
- C. CREATE INDEX IX1 ON locations (loc_shareci) ;
- D. CREATE INDEX 1X2 ON locations (loc_mapping) USING HASH; fH
- E. CREATE INDEX 1X7 ON users (user_name) USING HASH;
- F. CREATE INDEX 1X6 ON users (user_name);
- G. CREATE INDEX 1X3 ON locations <loc_site_id) ;
Answer: E,F
NEW QUESTION # 32
Examine this statement and output:
Now, examine these desired output values:
Which statement updates the table data as require
- A. UPDATE exam_result SET score=TRUNCATE(score,1);
- B. UPDATE exam_result SET score=TRUNCATE
- C. UPDATE exam_result SET score=CEIL(ROUND(score,1));
- D. UPDATE examresult SET score=ROUND(CEIL(score
- E. UPDATE exam_result SET score=ROUND(score,1);
- F. UPDATE exam_result SET score=CEIL(TRUNCATE(sco
Answer: 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_DEFAUXT_FETCH__MODE => PDO: : PDO: :FETCH_OBJ] ;
- B. $options = [PDO:: ATTR__DEFAULT_FETCH MODE => PDO: :FETCH_CLASS] ;
- C. $options = [PDO:: ATTR_DEFAOLT_FETCH__MODE => PDO : : FETCH_BOTH] ;
- D. $options = [PDO:: ATTR_DEFAULT_FETCH__MODE => PDO: : FETCH_ASSOC] ;
Answer: C
NEW QUESTION # 34
You are using buffered queries with PHP mysqli in a browser-based web application. Which three are true?
- A. Buffered queries must be explicitly enabled using mysqliuseresult.
- B. Results are sent to the calling PHP process for buffering.
- C. Additional queries on the same session are blocked until the result set is released.
- D. Buffered queries are enabled by default.
- E. Buffered queries should be used on large tables when the result size is unknown.
- F. Results are sent from the server to the browser for buffering.
- G. Large results can have a negative impact on performance.
Answer: A,E,G
NEW QUESTION # 35
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To prepare for the Oracle 1Z0-909 (MySQL 8.0 Database Developer) Certification Exam, candidates should have experience working with MySQL databases and be familiar with the MySQL command-line client. They should also have a strong understanding of SQL and be able to write complex queries using advanced features such as subqueries, joins, and group functions. Candidates may also benefit from studying database design principles, performance tuning techniques, and MySQL security concepts. Overall, passing the Oracle 1Z0-909 (MySQL 8.0 Database Developer) Certification Exam can help individuals demonstrate their expertise in MySQL database development and advance their careers in this field.
The Oracle 1Z0-909 exam is a certification exam designed for MySQL 8.0 database developers. The exam is intended to test the knowledge, skills, and abilities of candidates in the areas of database design and development, SQL programming, and database administration. This exam is a requirement for obtaining the Oracle Certified Professional, MySQL 8.0 Database Developer certification.
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