1z1-909 Dumps (2023) Prepare Your Exam With 66 Questions
New 1z1-909 Dumps - Real Oracle Exam Questions
Oracle 1z1-909 Exam Syllabus Topics:
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NEW QUESTION 27
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 does not block Session 2.
- E. Session 1 takes a shared lock on all the rows in the band table.
- F. Session 1 must commit before the update in Session 2 can complete.
Answer: B,F
NEW QUESTION 28
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: B
NEW QUESTION 29
You must enforce data integrity for data Inserted in a JSON column.
Which statement successfully creates a constraint in a 3SON column?
- A. CREATE TABLE fshop (product JSON CHECK (JSON_VALID(product) ) ) ;
- B. CREATE TABLE fshop (id INT NOT NULL AUTOINCREMENT, product JSON, PRIMARY KEY (id)) ENGINE=InnoDB;
- C. CREATE TABLE fshop (id INT NOT NULL AUTO_ INCREMENT, product JSON, CHECK (id>0) ) ENGXNE=InnoDB;
- D. CREATE TABLE fshop ( product JSON, f INT' GENERATED ALWAYS AS (product->"S - id") ) ;
Answer: B
NEW QUESTION 30
Examine this statement which has executed successfully:
- A. Execution performance can be improved by, using a composite index with column description as the leftmost prefix column description.
- 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. The statement takes advantage of index description_idx.
Answer: B
NEW QUESTION 31
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 C
- B. Option B
- C. Option D
- D. Option A
Answer: D
NEW QUESTION 32
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 33
Which two statements are true about AUTO_INCREMENT?
- A. A server restart always resets the AUTO_INCREMENT value to largest value in the AUTO_INCREMENT column plus 1.
- B. AUTO_INCREMENT values allocated to a transaction that is rolled back are not reused.
- C. An AUTO_INCREMENT column must be indexed.
- D. The decimal data type supports AUTO_INCREMENT.
- E. A table can have multiple AUTO_INCREMENT columns.
Answer: B,C
NEW QUESTION 34
Examine this table definition:
The table must always remain a valid document store collection. What restriction does this impose on any added column?
- A. The column must be used in a unique constraint.
- B. The column must be a generated column referencing any attribute of doc.
- C. The column must be indexed.
- D. The column must have a default value.
- E. The column must be a generated column referencing only an existing attribute of doc.
Answer: B
NEW QUESTION 35
You are using buffered queries with PHP mysqli in a browser-based web application. Which three are true?
- A. Buffered queries must be explicitly enabled using mysqliuseresult.
- B. Results are sent to the calling PHP process for buffering.
- C. Additional queries on the same session are blocked until the result set is released.
- D. Buffered queries should be used on large tables when the result size is unknown.
- E. Large results can have a negative impact on performance.
- F. Buffered queries are enabled by default.
- G. Results are sent from the server to the browser for buffering.
Answer: A,D,E
NEW QUESTION 36
The continent column in the country table contains no null values.
Examine this output:
A)
B)
C)
D)
- A. Option C
- B. Option B
- C. Option D
- D. Option A
Answer: D
NEW QUESTION 37
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 C
- B. Option B
- C. Option A
- D. Option D
Answer: B
NEW QUESTION 38
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 "O'Hagen" to 'o\'Hagen'.
- C. Change date () to CURRENT_TIMESTAMP () .
- D. Change DATE () to DAY ().
- E. Change "O'Hagen" to "O\'Hagen".
- F. Change " NULL " to NULL.
Answer: D,F
NEW QUESTION 39
Which two statements are true about AUTO_INCREMENT?
- A. A server restart always resets the AUTO_INCREMENT value to largest value in the AUTO_INCREMENT column plus 1.
- B. An AUTO_INCREMENT column must be indexed.
- C. AUTO_INCREMENT values allocated to a transaction that is rolled back are not reused.
- D. The decimal data type supports AUTO_INCREMENT.
- E. A table can have multiple AUTO_INCREMENT columns.
Answer: A,D
NEW QUESTION 40
How does InnoDB choose deadlock victims in MySQL?
- A. It chooses the transaction with the most accumulated CPU time.
- B. It chooses the transaction randomly.
- C. It chooses the transaction with the lowest transaction ID.
- D. It chooses the transaction with the fewest modified rows.
- E. It chooses the transaction with the most modified rows.
- F. It chooses the transaction with the least accumulated CPU time.
Answer: B
NEW QUESTION 41
Examine this statement that execute successfully in an interactive session:
The user running this session now goes to lunch for an hour.
Now, examine these statements executed independently in separate sessions while Session 0 is still active:
How many of them will complete while Session 0 is still active?
- A. 0
- B. 1
- C. 2
- D. 3
- E. 4
- F. 5
Answer: F
NEW QUESTION 42
Examine these statements:
SET collation_connection=utf8mb4_0900_as_cs;
SELECT STRCMPCAlice', UCASE ('Alice* )) ;
What is displayed?
- A. 0
- B. NULL
- C. 1
- D. 2
- E. ERROR: 1267 (HYOOO): Illegal mix of collations
Answer: C
NEW QUESTION 43
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