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Oracle MySQL 8.0 Database Developer Sample Questions (Q53-Q58):

NEW QUESTION # 53
Examine this bar graph based on columns from the players table:

Which two statements would generate this bar graph?

A. SELECT Name, Gender, Sport, RPAD ('# ' GPA*10) AS GPA_Graph FROM players ORDER BY GPA DESC;B. SELECT Name, Gender, Sport, REPEAT('# 'Y 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, CONCAT ('# ' GPA*10) AS GPA_Graph FROM players ORDER BY GPA DESC;E. SELECT Name, Gender, Sport, LENGTH (GPA*10, '# ') AS GPA_Graph FROM players ORDER BY GPA DESC;

Answer: A,E

NEW QUESTION # 54
What is an advantage of using mysqli in PHP programs rather than using PHP Data Objects (PDO)?

A. mysqli supports non blocking, asynchronous queries.B. mysqli supports object oriented programming.C. mysqli includes X DevAPI functions.D. mysqli can access databases from other vendors.

Answer: B

NEW QUESTION # 55
A server hosts MySQL Server and Apache Webserver supporting a PHP/PDO based application.
The application must be migrated from PHP to their Java application server on another host. The MySQL instance remains on the original host.
Examine the PDO connection string used in the existing application:
Mysql:host-localhost;dbname=sales;unix_socket=/var/run/mysql.sock
Which two prevent Java from using the Unix socket?

A. The socket can only be accessed from the local host.B. socket is a reserved word in Java.C. The socket is not implemented in Connector/J driver.D. Java treats the socket file as insecure.E. The X Dev API protocol must be enabled to use sockets in Connector/J driver.

Answer: C,D

NEW QUESTION # 56
Examine these statements which execute successfully:

Which two changes will improve this query performance?

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

Answer: B,C

NEW QUESTION # 57
Examine this statement and output:

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

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

Answer: D

NEW QUESTION # 58
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