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Oracle MySQL 8.0 Database Developer Sample Questions (Q48-Q53):

NEW QUESTION # 48
Examine this statement and output:

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

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

Answer: B

NEW QUESTION # 49
Examine this statement which executes successfully:
SET @ir := 2;
Which query updates the value of @r to 0?

A. SELECT 'Car' LIKE 'Ca?' INTO @r;B. SELECT 'Car' REGEXP('Ca?') >= 0 INTO @r;C. SELECT 'Car' RLIKE 'Ca?' INTO @r;D. SELECT STRCMP('Car'/Ca?') >= 0 INTO @r;

Answer: C

NEW QUESTION # 50
Which two differences exist between the timestamp and date time data types?

A. timestamp stores the interval between two dates.B. timestamp converts the value based on the session time zone.C. timestamp stores more decimal points in secondsD. timestamp has larger range of values.E. timestamp uses less storage space.

Answer: B,E

NEW QUESTION # 51
Examine these statements which execute successfully:

Which two changes will improve this query performance?

A. CREATE INDEX 1X7 ON users (user_name) USING HASH;B. CREATE INDEX IX1 ON locations (loc_shareci) ;C. CREATE INDEX 1X3 ON locations <loc_site_id) ;D. CREATE INDEX 1X4 ON Locations (site_id, loc_shared);E. CREATE INDEX 1X2 ON locations (loc_mapping) USING HASH; fHF. CREATE INDEX 1X6 ON users (user_name);G. CREATE INDEX 1X5 ON users (loc_id);

Answer: A,F

NEW QUESTION # 52
Examine the Test.php script which is numbered for clarity, and its output:

PHP Fatal error: Uncaught Error: call to underined function mysqli_connect () in Test.php:2 Which action will fix this error?

A. Replace line 2 With: Slink = mysql_xdevapi\getSession
("mysqlx://username:password@localhost:3306","schema");B. Install the PHP executable in the path used by the MySQL installation.C. Enable the mysqli extension in the php.ini file.D. Replace line 2 with Slink = mysql.connect {"localhost: 3306n, "username", "pas "schema") ;

Answer: C

NEW QUESTION # 53
......

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