[Nov 26, 2022] Genuine 1z1-909 Exam Dumps Free Demo
Printable & Easy to Use MySQL Developer 1z1-909 Dumps 100% Same Q&A In Your Real Exam
NEW QUESTION 36
Which two differences exist between the timestamp and date time data types?
- A. timestamp has larger range of values.
- B. timestamp stores the interval between two dates.
- C. timestamp stores more decimal points in seconds
- D. timestamp converts the value based on the session time zone.
- E. timestamp uses less storage space.
Answer: B,C
NEW QUESTION 37
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. A server restart always resets the AUTO_INCREMENT value to largest value in the AUTO_INCREMENT column plus 1.
- D. A table can have multiple AUTO_INCREMENT columns.
- E. The decimal data type supports AUTO_INCREMENT.
Answer: C,E
NEW QUESTION 38
Which select statement returns true?
- A. SELECT NULL <=> NULL;
- B. SELECT NULL = NULL;
- C. SELECT NULL := NULL;
- D. SELECT NULL <> NULL;
Answer: C
NEW QUESTION 39
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. Execution of an insert statement causes the trigger to activate.
- C. The trigger body set causes trigger activation.
- D. The trigger activates after any row has been inserted into the table.
Answer: B
NEW QUESTION 40
You must reclaim memory used by a prepared statement named prep. Which two achieve this?
- A. SET @prep = NULL;
- B. DROP PROCEDURE prep;
- C. SET @a = ''; EXECUTE prep USING @a;
- D. DROP PREPARE prep;
- E. DEALLOCATE PREPARE prep?
- F. PREPARE prep FROM '';
Answer: A,B
NEW QUESTION 41
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. Disable TLS/SSL authentication.
- C. Place this in the root directory of your shell account:
[mysqld] require__secure_transport=OFF - D. Use blank RSA or SSL certificates.
- E. Upgrade the connector to a version that supports caching_sha2_password.
Answer: A,E
NEW QUESTION 42
Examine this event's metadata:
Now examine this command:
DROP USER 'userl'e'localhost';
Which effect will the command have on the event?
- A. The event is scheduled and executed but fails. The system will log an error.
- B. The event will be dropped without an error or warning.
- C. The event is scheduled but will no longer execute. The system will log an error.
- D. The event is not scheduled and will no longer execute. The system will log an error.
Answer: C
NEW QUESTION 43
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?
- A. It returns an error because the PRIMARY ACCOUNT column is not selected for the view definition.
- B. It inserts a row in the emp table.
- C. It inserts a row in the view only.
- D. It returns an error because an insert operation is not allowed on views.
Answer: B
NEW QUESTION 44
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_DEFAULT_FETCH__MODE => PDO: : FETCH_ASSOC] ;
- D. $options = [PDO:: ATTR_DEFAOLT_FETCH__MODE => PDO : : FETCH_BOTH] ;
Answer: D
NEW QUESTION 45
The variables c and d are declared as integer types.
Examine these initialization statements with placeholder value <p1>, which execute successfully:
Now, examine this loop which executes successfully:
Which loop results in the same value of d for all valid values of <p1>?
A)
B)
C)
- A. Option D
- B. Option A
- C. Option B
- D. Option C
Answer: B
NEW QUESTION 46
Examine this statement which has executed successfully:
- A. The statement takes advantage of index description_idx.
- B. Execution performance can be improved by using like instead of RLIKE.
- C. No index will improve statement performance.
- 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: B
NEW QUESTION 47
Examine this bar graph based on columns from the players table:
Which two statements would generate this bar graph?
- A. SELECT Name, Gender, Sport, REPEAT('# 'Y GPA*10) AS GPA_Graph FROM players ORDER BY GPA DESC;
- B. SELECT Name, Gender, Sport, RPAD ('# ' GPA*10) AS GPA_Graph FROM players ORDER BY GPA DESC;
- C. SELECT Name, Gender, Sport, CHAR_LENGTH ('# ' 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, CONCAT ('# ' GPA*10) AS GPA_Graph FROM players ORDER BY GPA DESC;
Answer: A,B
NEW QUESTION 48
Examine these my.cnf settings:
Examine this entry from /data/slow.log
Which option is also set in my.cnf?
- A. log__slow_admin_statements=1
- B. log_queries_not_using_indexes
- C. log_throttle_queries_not_using_indexes=100
- D. log_queries_not_using_indexes=ON
Answer: A
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_3(attendant_id, created_by)
- B. ALTER TABLE appointments add index IX_1(credit,payment)
- C. ALTER TABLE appointments add index IX_2(attendant_session_id, created_by)
- D. ALTER TABLE appointments add index IX_4<attendant_id, payment, credit)
Answer: D
NEW QUESTION 50
The collection col contains all episodes for all seasons for a TV show.
Examine this document which has an example of the details for each episode:
Which query returns all expisode names from the first season?
- A. SELECT doc->,$.name,, FROM col WHERE doc->"$ . season" = "1";
- B. SELECT name FROM col WHERE season = 1;
- C. SELECT doc->"$.name" FROM col WHERE doc->"$.season" = "1";
- D. SELECT "S.name" FROM col WHERE "S.season" = "1";
Answer: D
NEW QUESTION 51
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 D
- B. Option A
- C. Option B
- D. Option C
Answer: B
NEW QUESTION 52
Examine these statement which execute successfully:
Now, examine the statements executed in the mysqi command-line client:
What is true?
A)
B)
C)
D)
- A. Option A
- B. Option C
- C. Option D
- D. Option B
Answer: B
NEW QUESTION 53
The continent column in the country table contains no null values.
Examine this output:
A)
B)
C)
D)
- A. Option D
- B. Option A
- C. Option B
- D. Option C
Answer: B
NEW QUESTION 54
Which statement is true about the show errors command?
- A. It displays the total number of errors, warnings, and notes since the server last restarted.
- B. It displays errors messages only, since the start time of the current session.
- C. It displays errors messages only, since the server last restarted.
- D. It displays the total number of errors, warnings, and notes since the beginning of the current session.
- E. It cannot display information for more than max_errot_count server system variable setting.
- F. It displays similar diagnostics results as get diagnostics.
Answer: D
NEW QUESTION 55
Examine these statement which execute successfully:
Now, examine this desired output:
Which two queries will produce the out?
- A.
- B.
- C.
- D.
- E.
Answer: B,E
NEW QUESTION 56
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 - name' ) 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) AS (product-
>* S .varieties. VarietyName ' ) VIRTUAL, ADD KEY idx_name (name.) ;
Answer: A
NEW QUESTION 57
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. MIN () cannot use distinct when it executes as a Windows function.
- C. AVG () does not allow use of the distinct option.
- D. SUM () returns o if there are no rows to aggregate.
- E. MAX () returns null if there are no rows to aggregate.
Answer: C
NEW QUESTION 58
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(last name,', ',first_name) FROM employees;
- C. SELECT CONCAT_WS(', ',last_name,first_name) FROM employees;
- D. SELECT GROUP_CONCAT(last_name, first_name) FROM employees;
- E. SELECT last_name, ' , ',first_name FROM employees;
Answer: A,D
NEW QUESTION 59
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 CONCAT_WS(', ',last_name,first_name) FROM employees;
- B. SELECT CONCAT(last name,', ',first_name) FROM employees;
- C. SELECT last_name + ', ' + first_name FROM employees;
- D. SELECT GROUP_CONCAT(last_name, first_name) FROM employees;
- E. SELECT last_name, ' , ',first_name FROM employees;
Answer: A,B
NEW QUESTION 60
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