[Full-Version] 2022 Updated Oracle Study Guide 1z1-909 Dumps Questions
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Oracle 1z1-909 Exam Syllabus Topics:
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NEW QUESTION 18
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: D
NEW QUESTION 19
Examine these lines of Python code:
You must add a line of code to complete the code to return data to the variable d. Which line will do this?
- A. d = cursor . f etchall (query)
- B. d = cursor.fetch(query, (hire_start, hire_end))
- C. d = cursor.fetchall(query, (hire_start, hire_end))
- D. d = cursor.fetch(query % (hire_start, hire_end))
- E. d = cursor.execute(query)
- F. d = cursor.execute(query, (hire_start, hire_end) )
Answer: B
NEW QUESTION 20
Examine the layout of the my_values table.
Examine the data in the my_value3 table.
Examine this statement:
A)
B)
D)
- A. Option C
- B. Option D
- C. Option A
- D. Option B
Answer: D
NEW QUESTION 21
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 isolation level is READ COMMITTED 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 transaction still active in s2.
- D. The inserted row is returned because the transaction is auto committed in S2.
Answer: D
NEW QUESTION 22
Which two statements are true about aggregate functions?
- A. MAX () returns null if there are no rows to aggregate.
- 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. AVG () does not allow use of the distinct option.
- E. SUM () returns o if there are no rows to aggregate.
Answer: D
NEW QUESTION 23
Examine this bar graph based on columns from the players table:
Which two statements would generate this bar graph?
- A. SELECT Name, Gender, Sport, CHAR_LENGTH ('# ' GPA*10) AS GPA_Graph FROM players ORDER BY GPA DESC;
- B. SELECT Name, Gender, Sport, CONCAT ('# ' GPA*10) AS GPA_Graph FROM players ORDER BY GPA DESC;
- C. SELECT Name, Gender, Sport, LENGTH (GPA*10, '# ') AS GPA_Graph FROM players ORDER BY GPA DESC;
- D. SELECT Name, Gender, Sport, REPEAT('# 'Y GPA*10) AS GPA_Graph FROM players ORDER BY GPA DESC;
- E. SELECT Name, Gender, Sport, RPAD ('# ' GPA*10) AS GPA_Graph FROM players ORDER BY GPA DESC;
Answer: C,E
NEW QUESTION 24
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. Statements in Session 2 are committed.
- C. Session 2 takes an exclusive lock on all the rows in the band table.
- D. Session 1 takes a shared lock on all the rows in the band table.
- E. Session 1 must commit before the update in Session 2 can complete.
- F. Session 1 does not block Session 2.
Answer: B,E
NEW QUESTION 25
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 includes X DevAPI functions.
- C. mysqli supports object oriented programming.
- D. mysqli can access databases from other vendors.
Answer: C
NEW QUESTION 26
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 adding an index on column description.
- E. Execution performance can be improved by, using a composite index with column description as the leftmost prefix column description.
Answer: B
NEW QUESTION 27
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 28
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. Execution succeeds and allows the use of the index by the optimizer.
- C. An error is generated because the index prevents changes to the column.
- D. Execution succeeds with a warning.
Answer: C
NEW QUESTION 29
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)
- A. Option B
- B. Option C
- C. Option D
- D. Option A
Answer: D
NEW QUESTION 30
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 B
- B. Option C
- C. Option D
- D. Option A
Answer: D
NEW QUESTION 31
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. The socket is not implemented in Connector/J driver.
- C. The X Dev API protocol must be enabled to use sockets in Connector/J driver.
- D. Java treats the socket file as insecure.
- E. socket is a reserved word in Java.
Answer: B,D
NEW QUESTION 32
Which two statements are true about AUTO_INCREMENT?
- A. The decimal data type supports AUTO_INCREMENT.
- B. A server restart always resets the AUTO_INCREMENT value to largest value in the AUTO_INCREMENT column plus 1.
- C. AUTO_INCREMENT values allocated to a transaction that is rolled back are not reused.
- D. An AUTO_INCREMENT column must be indexed.
- E. A table can have multiple AUTO_INCREMENT columns.
Answer: A,B
NEW QUESTION 33
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. Enable the mysqli extension in the php.ini file.
- B. Replace line 2 With: Slink = mysql_xdevapi\getSession
("mysqlx://username:password@localhost:3306","schema"); - C. Replace line 2 with Slink = mysql.connect {"localhost: 3306n, "username", "pas "schema") ;
- D. Install the PHP executable in the path used by the MySQL installation.
Answer: A
NEW QUESTION 34
Examine these commands and output:
Which is true about the execution of the insert statement?
- A. It inserts a new row in the base table only.
- B. It inserts a row in the view and base table.
- C. It returns an error.
- D. It inserts a new row in the view only.
Answer: D
NEW QUESTION 35
Examine these MySQL Shell statements:
What is the true about the attempts to add document to the collection?
- A. First two documents are added, then mismatched field names cause a warning.
- B. All documents are added without any error or warning.
- C. All documents are added and cause a warning.
- D. First two documents are added, then mismatched field names cause an error.
- E. First three documents are added, then different number of fields cause an error.
Answer: C
NEW QUESTION 36
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 will be dropped without an error or warning.
- B. The event is scheduled but will no longer execute. The system will log an error.
- C. The event is scheduled and executed but fails. The system will log an error.
- D. The event is not scheduled and will no longer execute. The system will log an error.
Answer: B
NEW QUESTION 37
Your session has sqi_mode set to default.
Examine this statement which executes successfully:
Now examine this statement:
Which two changes are required to the insert statement so that it inserts the correct data?
* std_id = 10301
* firstname = Mary
* lastname = O'Hagen
* birthdate = November 26, 1997
* reg_date = the current date
- A. Change " NULL " to ' NULL ' .
- B. Change date () to CURRENT_TIMESTAMP () .
- C. Change "O'Hagen" to 'o\'Hagen'.
- D. Change DATE () to DAY ().
- E. Change " NULL " to NULL.
- F. Change "O'Hagen" to "O\'Hagen".
Answer: D,E
NEW QUESTION 38
You are using buffered queries with PHP mysqli in a browser-based web application. Which three are true?
- A. Large results can have a negative impact on performance.
- B. Additional queries on the same session are blocked until the result set is released.
- C. Buffered queries must be explicitly enabled using mysqliuseresult.
- D. Buffered queries should be used on large tables when the result size is unknown.
- E. Results are sent from the server to the browser for buffering.
- F. Results are sent to the calling PHP process for buffering.
- G. Buffered queries are enabled by default.
Answer: A,C,D
NEW QUESTION 39
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 but it will be unusable until the specified storage engine is available.
- 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 using the default storage engine.
Answer: C
NEW QUESTION 40
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 inserts a row in the view only.
- B. It returns an error because an insert operation is not allowed on views.
- C. It returns an error because the PRIMARY ACCOUNT column is not selected for the view definition.
- D. It inserts a row in the emp table.
Answer: D
NEW QUESTION 41
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