Oracle 1z1-909 Exam Prep Guide: Prep guide for the 1z1-909 Exam
2022 New Preparation Guide of Oracle 1z1-909 Exam
NEW QUESTION 11
The continent column in the country table contains no null values.
Examine this output:
A)
B)
C)
D)
- A. Option B
- B. Option D
- C. Option C
- D. Option A
Answer: D
NEW QUESTION 12
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 D
- B. Option A
- C. Option B
- D. Option C
Answer: C
NEW QUESTION 13
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 last_name, ' , ',first_name FROM employees;
- C. SELECT last_name + ', ' + first_name FROM employees;
- D. SELECT CONCAT(last name,', ',first_name) FROM employees;
- E. SELECT GROUP_CONCAT(last_name, first_name) FROM employees;
Answer: C,E
NEW QUESTION 14
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: C
NEW QUESTION 15
Which change will prevent negative ages to be inserted into the people table?
- A. ALTER TABLE people ADD COLUMN valid_age=ABS(check_age) GENERATED ALWAYS;
- 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 CONSTRAINT check_age CHECK (ABS(age)>=0);
Answer: D
NEW QUESTION 16
Which two differences exist between the timestamp and date time data types?
- A. timestamp stores more decimal points in seconds
- B. timestamp stores the interval between two dates.
- C. timestamp has larger range of values.
- D. timestamp converts the value based on the session time zone.
- E. timestamp uses less storage space.
Answer: A,B
NEW QUESTION 17
Examine this statement which has executed successfully:
- A. Execution performance can be improved by adding an index on column description.
- B. Execution performance can be improved by using like instead of RLIKE.
- C. The statement takes advantage of index description_idx.
- D. Execution performance can be improved by, using a composite index with column description as the leftmost prefix column description.
- E. No index will improve statement performance.
Answer: D
NEW QUESTION 18
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_4<attendant_id, payment, credit)
- C. ALTER TABLE appointments add index IX_1(credit,payment)
- D. ALTER TABLE appointments add index IX_2(attendant_session_id, created_by)
Answer: B
NEW QUESTION 19
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 1 takes a shared lock on all the rows in the band table.
- B. Session 1 must commit before the update in Session 2 can complete.
- C. Session 2 does not start a transaction.
- D. Session 2 takes an exclusive lock on all the rows in the band table.
- E. Session 1 does not block Session 2.
- F. Statements in Session 2 are committed.
Answer: B,F
NEW QUESTION 20
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: C
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 returned because the transaction is auto committed in S2.
- B. The inserted row is not returned because the isolation level is READ COMMITTED in S2.
- C. The inserted row is not returned because the transaction still active in s2.
- D. The inserted row is returned because the isolation level is RPEATABLE READ in S1.
Answer: C
NEW QUESTION 22
Examine this statement:
DECLARE not_found CONDITION FOR SQLSTATE '02000';
In which two statements can not found be used?
- A. in a leave statement to exit a loop
- B. in an if statement
- C. in a while loop
- D. in a signal statement
- E. in a handler declaration
Answer: C,D
NEW QUESTION 23
Which select statement returns true?
- A. SELECT NULL <=> NULL;
- B. SELECT NULL <> NULL;
- C. SELECT NULL = NULL;
- D. SELECT NULL := NULL;
Answer: D
NEW QUESTION 24
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.fetchall(query, (hire_start, hire_end))
- B. d = cursor.fetch(query, (hire_start, hire_end))
- C. d = cursor . f etchall (query)
- D. d = cursor.execute(query)
- E. d = cursor.fetch(query % (hire_start, hire_end))
- F. d = cursor.execute(query, (hire_start, hire_end) )
Answer: B
NEW QUESTION 25
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 not scheduled and will no longer execute. The system will log an error.
- 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 will be dropped without an error or warning.
Answer: B
NEW QUESTION 26
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_ASSOC] ;
- C. $options = [PDO:: ATTR__DEFAULT_FETCH MODE => PDO: :FETCH_CLASS] ;
- D. $options = [PDO:: ATTR_DEFAUXT_FETCH__MODE => PDO: : PDO: :FETCH_OBJ] ;
Answer: A
NEW QUESTION 27
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. Use blank RSA or SSL certificates.
- B. Place this in the root directory of your shell account:
[mysqld] require__secure_transport=OFF - C. Upgrade the connector to a version that supports caching_sha2_password.
- D. Disable TLS/SSL authentication.
- E. Change the user account to use mysql_native_password.
Answer: C
NEW QUESTION 28
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