[May-2023] 1Z0-909 Certification with Actual Questions from PracticeDump
Updated 1Z0-909 Dumps PDF - 1Z0-909 Real Valid Brain Dumps With 66 Questions!
NEW QUESTION # 28
The meeting table stores meeting schedules with participants from five continents. The participants' details are stored in another table.
You need to adjust the start_time and duration columns for optimal storage. What datatype changes would achieve this?
- A. start__time DATETIME duration TIME
- B. start_time TIMESTAMP duration TIMESTAMP
- C. start_time TIMESTAMP duration TIME
- D. start_time DATETIME duration DATETIME
- E. start_time TIME duration TIME
Answer: D
NEW QUESTION # 29
Examine these statements which execute successfully:
Now, examine this query:
What is the result?
- A. It fails with a warning.
- B. It inserts a row with no error or warning.
- C. It inserts a row with an error.
- D. It inserts a row with a warning.
- E. It fails with an error.
Answer: B
NEW QUESTION # 30
Examine this statement which executes successfully:
The table is populated with a range of values including jobs for Robert, John, and Katie. Now, examine this statement and output:
Why is an empty result set returned?
- A. The virtual values in the name column must be accessed using functions.
- B. The select requires json_unquoteo in the where clause.
- C. The JSON datatype cannot be used in virtual columns.
- D. The json_extract() function requires a length value that matches the field length in the schema.
- E. Table statistics must be updated to generate values for the name column.
Answer: C
NEW QUESTION # 31
Which two statements are true about AUTO_INCREMENT?
- A. AUTO_INCREMENT values allocated to a transaction that is rolled back are not reused.
- B. An AUTO_INCREMENT column must be indexed.
- C. The decimal data type supports AUTO_INCREMENT.
- D. A server restart always resets the AUTO_INCREMENT value to largest value in the AUTO_INCREMENT column plus 1.
- E. A table can have multiple AUTO_INCREMENT columns.
Answer: C,D
NEW QUESTION # 32
Examine this statement which has executed successfully:
- A. The statement takes advantage of index description_idx.
- B. No index will improve statement performance.
- C. Execution performance can be improved by, using a composite index with column description as the leftmost prefix column description.
- D. Execution performance can be improved by using like instead of RLIKE.
- E. Execution performance can be improved by adding an index on column description.
Answer: D
NEW QUESTION # 33
Which two statements are true about aggregate functions?
- A. AVG () does not allow use of the distinct option.
- B. MIN () cannot use distinct when it executes as a Windows function.
- C. COUNT (distinct) returns a count of the number of rows with different values including Null.
- D. SUM () returns o if there are no rows to aggregate.
- E. MAX () returns null if there are no rows to aggregate.
Answer: A
NEW QUESTION # 34
The continent column in the country table contains no null values.
Examine this output:
A)
B)
C)
D)
- A. Option B
- B. Option C
- C. Option A
- D. Option D
Answer: C
NEW QUESTION # 35
Examine these statement which execute successfully:
Now, examine the statements executed in the mysqi command-line client:
What is true?
- A.
- B.
- C.
- D.
Answer: C
NEW QUESTION # 36
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 B
- B. Option A
- C. Option C
- D. Option D
Answer: D
NEW QUESTION # 37
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 using the default storage engine.
- C. The server will create the table but it will be unusable until the specified storage engine is available.
- 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 # 38
Examine this table definition:
The table must always remain a valid document store collection. What restriction does this impose on any added column?
- A. The column must be indexed.
- B. The column must have a default value.
- C. The column must be a generated column referencing only an existing attribute of doc.
- D. The column must be a generated column referencing any attribute of doc.
- E. The column must be used in a unique constraint.
Answer: D
NEW QUESTION # 39
Examine these statements which execute successfully:
The statements executed without exception. Which two are true?
- A. No transaction commits.
- B. One row is inserted into band.
- C. No row is inserted into band.
- D. Two transactions commit.
- E. The transaction is rolled back to the savepoint.
Answer: A,B
NEW QUESTION # 40
Examine these statements and output:
Now, examine this command:
Mysql> ROLLBACK;
What is true about the effect of the command?
- A. It returns an error because there is no active transaction.
- B. It has no effect.
- C. It undoes both insert and update commands.
- D. It undoes the insert command.
- E. It undoes the update command.
Answer: D
NEW QUESTION # 41
Examine this statement and output:
Which will provide the same level of detail when the error is encountered within a stored routine?
- A.
- B.
- C.
- D.
Answer: D
NEW QUESTION # 42
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. Upgrade the connector to a version that supports caching_sha2_password.
- B. Use blank RSA or SSL certificates.
- C. Place this in the root directory of your shell account:
[mysqld] require__secure_transport=OFF - D. Disable TLS/SSL authentication.
- E. Change the user account to use mysql_native_password.
Answer: A
NEW QUESTION # 43
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_CLASS] ;
- C. $options = [PDO:: ATTR_DEFAULT_FETCH__MODE => PDO: : FETCH_ASSOC] ;
- D. $options = [PDO:: ATTR_DEFAUXT_FETCH__MODE => PDO: : PDO: :FETCH_OBJ] ;
Answer: A
NEW QUESTION # 44
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. Statements in Session 2 are committed.
- D. Session 2 takes an exclusive lock on all the rows in the band table.
- E. Session 1 takes a shared lock on all the rows in the band table.
- F. Session 1 must commit before the update in Session 2 can complete.
Answer: C,F
NEW QUESTION # 45
How does InnoDB choose deadlock victims in MySQL?
- A. It chooses the transaction with the lowest transaction ID.
- B. It chooses the transaction with the least accumulated CPU time.
- C. It chooses the transaction randomly.
- D. It chooses the transaction with the most accumulated CPU time.
- E. It chooses the transaction with the fewest modified rows.
- F. It chooses the transaction with the most modified rows.
Answer: C
NEW QUESTION # 46
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 not returned because the transaction still active in s2.
- B. The inserted row is returned because the isolation level is RPEATABLE READ in S1.
- C. The inserted row is not returned because the isolation level is READ COMMITTED in S2.
- D. The inserted row is returned because the transaction is auto committed in S2.
Answer: A
NEW QUESTION # 47
Examine these statement which execute successfully:
Now, examine this desired output:
Which two queries will produce the out?
- A.
- B.
- C.
- D.
- E.
Answer: A,E
NEW QUESTION # 48
Which change will prevent negative ages to be inserted into the people table?
- A. ALTER TABLE people ADD CONSTRAINT check_age CHECK (ABS(age)>=0);
- B. DELIMITER //
CREATE TRIGGER agecheck BEFORE INSERT ON people FOR EACH ROW IF NEW. age < 0 THEN SET NEW.age =0; END IF;// DELIMITER ; - C. DELIMITER //
CREATE TRIGGER age check AFTER INSERT ON people FOR EACH ROW IF NEW. age < 0 THEN SET NEW.age =0; END IF;// DELIMITER; - D. ALTER TABLE people ADD COLUMN valid_age=ABS(check_age) GENERATED ALWAYS;
Answer: A
NEW QUESTION # 49
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. The decimal data type supports AUTO_INCREMENT.
- C. A table can have multiple AUTO_INCREMENT columns.
- D. AUTO_INCREMENT values allocated to a transaction that is rolled back are not reused.
- E. An AUTO_INCREMENT column must be indexed.
Answer: D,E
NEW QUESTION # 50
Examine this SQL statement:
- A. db. country-select(['Name','Population']) .where('Name LIKE :param') -bind ('param' , 'United*') -limit(5)
- B. db . country. Select ([Name' , 'Population.'] ) -limit (5) .where('Name LIKE "United%"')
- C. db . country, select ( [ ' Name LIKE "united%" ' , ' Population>^0 ' ] ) - limit (5)
- D. db . country. fields ( [ ' Name ' , 'Population']) . select (' limit=5 ' ) .where('Name LIKE "United%" ' )
- E. db.country. fields ( [ 'Name ' , 'Population* ] ) .where ( 'Name LIKE "United%',,) -select ()-limit(5)
Answer: A
NEW QUESTION # 51
Examine these statements:
SET collation_connection=utf8mb4_0900_as_cs;
SELECT STRCMPCAlice', UCASE ('Alice* )) ;
What is displayed?
- A. NULL
- B. 0
- C. 1
- D. ERROR: 1267 (HYOOO): Illegal mix of collations
- E. 2
Answer: B
NEW QUESTION # 52
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