[Sep 04, 2024] 1z1-071 Dumps Full Questions - Exam Study Guide
Oracle PL/SQL Developer Certified Associate Free Certification Exam Material from Prep4SureReview with 323 Questions
Oracle 1z0-071 exam is a prerequisite for many other Oracle certifications, including the Oracle Database 12c Administrator Certified Associate and Oracle Database 12c Administrator Certified Professional. Oracle Database SQL certification is also a valuable asset for individuals seeking employment in the IT industry, as it demonstrates their expertise in working with Oracle databases. Overall, the Oracle 1z0-071 exam is a challenging but rewarding certification that can open up many opportunities for individuals who work with databases.
Oracle 1z1-071 (Oracle Database SQL) is a certification exam designed for individuals who are interested in pursuing a career in database management. 1z1-071 exam is intended to evaluate the candidate's knowledge of SQL and database concepts. Passing 1z1-071 exam validates the candidate's proficiency in SQL and their ability to work with Oracle Database.
NEW QUESTION # 21
Which three statements are true regarding single row subqueries?
- A. They must return a row to prevent errors in the SQL statement.
- B. They can be used in the HAVING clause.
- C. They must be placed on the left side of the comparison operator or condition.
- D. A SQL statement may have multiple single row subquery blocks.
- E. They must be placed on the right side of the comparison operator or condition.
- F. They can be used in the clause.
Answer: B,D,E
Explanation:
C: True. A SQL statement may include multiple single row subqueries in different parts of the statement, such as in the SELECT list, WHERE clause, or HAVING clause. Each subquery must independently satisfy the requirement of returning a single row to avoid runtime errors.
D: True. Single row subqueries can be used in the HAVING clause. This allows for filtering groups based on conditions evaluated against individual or aggregated values returned by the subquery. The subquery must return a single value to be valid in this context.
E: True. Single row subqueries are often placed on the right side of the comparison operator in a SQL condition. This positioning is typical because the left side often references a column or an expression related to the main query, while the subquery on the right side dynamically provides a value for comparison.
NEW QUESTION # 22
The SYSDATE function displays the current Oracle Server date as:
21 -MAY-19
You wish to display the date as:
MONDAY, 21 MAY, 201 9
Which statement will do this?
- A. SELECT TO _ DATE (SYSDATE, ' FMDAY, DD MONTH, YYYY') FROM DUAL;
- B. SELECT TO _ CHAR (SYSDATE, ' FMDAY, DD MONTH, YYYY') FROM DUAL;
- C. SELECT TO_ CHAR (SYSDATE, ' FMDD, DAY MONTH, YYYY') FROM DUAL;
- D. SELECT TO_ CHAR (SYSDATE, ' FMDAY, DDTH MONTH, YYYY') FROM DUAL;
Answer: B
NEW QUESTION # 23
Which two statements are true about Entity Relationships?
- A. A one-to-one relationship is always a self-referencing relationship
- B. A one-to-many relatonship in one direction is a one-to-one relationship in the other direction
- C. A many-to-many relationship can be implemented only by using foreign keys
- D. A Relationship can be mandatory for both entities
- E. A table name can be specified just once when selecting data from a table having a selfreferencing relationship
Answer: C,D
NEW QUESTION # 24
View the Exhibit and examine the description of the ORDERS table.
- A. 2003','MON DD YYYY') )
WHERE order_date > TO_CHAR(ADD_MONTHS(SYSDATE,6),'MON DD YYYY') - B. Which two WHERE clause conditions demonstrate the correct usage of conversion functions? (Choose two.) WHERE order_date_IN ( TO_DATE('OCT 21 2003','MON DD YYYY'), TO_CHAR('NOV 21
- C. WHERE TO_CHAR(order_date,'MON DD YYYY') = 'JAN 20 2003'
- D. WHERE order_date > TO_DATE('JUL 10 2006','MON DD YYYY')
Answer: C,D
NEW QUESTION # 25
Which two are true about constraints?
- A. A constraint can be disabled even if the constrained column contains data.
- B. A column with a foreign key constraint can never contain a null value.
- C. All constraints can be defined at the table or column level.
- D. A column with a UNIQUE constraint can contain a NULL value.
- E. Constraints are enforced only during INSERT operations.
Answer: A,D
Explanation:
A; False. Constraints are enforced during INSERT and UPDATE operations, and by the nature of their definition, they impact DELETE operations as well (in the case of referential constraints).
B: False. A column with a foreign key constraint can contain a NULL value unless it is also constrained to be NOT NULL.
C: False. Not all constraints can be defined at the column level. For example, some constraints such as FOREIGN KEY constraints are more commonly defined at the table level.
D: True. A constraint can be disabled regardless of whether the constrained column contains data. However, re-enabling the constraint requires that all data satisfy the constraint rules.
E; True. A column with a UNIQUE constraint can indeed contain a NULL value, as NULL is considered not equal to any value, including itself. This means that multiple rows with NULL values do not violate the UNIQUE constraint.
References:
* Oracle Documentation on Constraints:
https://docs.oracle.com/database/121/SQLRF/clauses002.htm#SQLRF52271
* Oracle Documentation on Enabling and Disabling Constraints:
https://docs.oracle.com/database/121/ADMIN/clustrct.htm#ADMIN13508
NEW QUESTION # 26
Examine the description of the EMPLOYEES table:
Which statement increases each employee's SALARY by the minimum SALARY for their DEPARTM ENT_ID?
- A. UPDATE employees e1
SET salary =(SELECT e2. salary + MIN(e2.salary)
FROM employees e2
WHERE e1.department_ id = e2. department_id GROUP BY e2. department_id) ; - B. UPDATE employees e1
SET salary=
(SELECT e1.salary + MIN(e2.salary)
FROM employees e2
WHERE e1. department_ id = e2.department_id); - C. UPDATE employees e1
SET salary = salary +
(SELECT MIN(e1. salary)
FROM employees e2
WHERE e1.department_id = e2 .department_id); - D. UPDATE employees e1
SET salary = salary+(SELECT MIN (salary)
FROM employees e2) ;
Answer: B
NEW QUESTION # 27 
Which two queries execute successfully?
- A. SELECT prod_id, exp_date FROM products
UNION ALL
SELECT prod_id, NULL FROM new_products; - B. SELECT k FROM products
MINUS
SELECT prod_id FROM new_products; - C. SELECT prod_id, prod_name FROM products
INTERSECT
SELECT 100, prod_name FROM newproducts; - D. SELECT prod_id FROM products
UNION ALL
SELECT prod_id, prod_name FROM new_products; - E. SELECT * FROM products
UNION
SELECT * FROM new_products;
Answer: A,E
NEW QUESTION # 28
Examine the command to create the BOOKS table.
The BOOK_IDvalue 101does not exist in the table.
Examine the SQL statement:
Which statement is true?
- A. It executes successfully only if NULLis explicitly specified in the INSERTstatement.
- B. It executes successfully only if the PUBLISHER_IDcolumn name is added to the columns list and NULL is explicitly specified in the INSERTstatement.
- C. It executes successfully only if the PUBLISHER_IDcolumn name is added to the columns list in the INSERTstatement.
- D. It executes successfully and the row is inserted with a rule PUBLISHER_ID.
Answer: D
NEW QUESTION # 29
View the Exhibit and examine the details of the PRODUCT_INFORMATIONtable.
Exhibit
You must display PRODUCT_NAME from the table where the CATEGORY_IDcolumn has values 12or 13, and the SUPPLIER_IDcolumn has the value 102088.
You executed this SQL statement:
Which statement is true regarding the execution?
- A. It would execute but would return no rows.
- B. It would execute and return the desired result.
- C. It would not execute because the same column has been used twice with the ANDlogical operator.
- D. It would not execute because the entire WHEREclause is not enclosed within parentheses.
Answer: A
Explanation:
Explanation/Reference:
NEW QUESTION # 30
View the Exhibit and examine the structure of the PRODUCT table.
Which two tasks would require subqueries? (Choose two.)
- A. display the minimum list price for each product status
- B. display all products whose minimum list price is more than the average list price of products having the status 'orderable'
- C. display all suppliers whose list price is more than 1000
- D. display the number of products whose list prices are more than the average list price
- E. display the total number of products supplied by supplier 102 and have product status as 'OBSOLETE'
Answer: B,D
NEW QUESTION # 31
Which two tasks can be performed by using Oracle SQL statements? (Choose two.)
- A. executing operating system (OS) commands in a session
- B. connecting to a database instance
- C. querying data from tables in different databases
- D. starting up a database instance
- E. changing the password for an existing database user
Answer: C,E
Explanation:
Explanation/Reference:
References:
http://www.techonthenet.com/oracle/password.php
https://docs.oracle.com/cd/B28359_01/server.111/b28324/tdpii_distdbs.htm
NEW QUESTION # 32
You execute these commands successfully:
CREATE GLOBAL TEMPORARY TABLE invoices _ gtt
( customer id INTEGER,
invoice_ total NUMBER (10, 2)
) ON COMMIT PRESERVE ROWS;
INSERT INTO invoices_ gtt VALUES (1 100);
COMMIT;
Which two are true?
- A. Other sessions can view the committed row.
- B. You can add a column to the table in this session.
- C. To drop the table in this session, you must first truncate it.
- D. When you terminate your session, the row will be deleted.
- E. You can add a foreign key to the table.
Answer: A,D
Explanation:
* A: This statement is false. You cannot add a foreign key to a global temporary table because the data in a global temporary table is session-specific, while a foreign key constraint implies a permanent relationship.
* B: This statement is false. The ON COMMIT PRESERVE ROWS clause specifies that the data in the table should be preserved until the end of the session, not deleted at the end of the transaction.
* C: This statement is false. You can drop a global temporary table without truncating it first.
* D: This statement is true. You can alter a global temporary table to add columns within a session.
* E: This statement is false. Data in a global temporary table with the ON COMMIT PRESERVE ROWS clause is private to the session that inserted the data, and cannot be seen by other sessions.
NEW QUESTION # 33
Which two statements are true about substitution variables? (Choose two.)
- A. A substitution variable can be used with any clause in a SELECT statement
- B. A substitution variable used to prompt for a column name must be enclosed in double quotation marks
- C. A substitution variable used to prompt for a column name must be enclosed in a single quotation marks
- D. A substitution variable prefixed with & always prompts only once for a value in a session
- E. A substitution variable prefixed with && prompts only once for a value in a session unless it is set to undefined in the session
- F. A substitution variable can be used only in a SELECT statement
Answer: C,D
NEW QUESTION # 34
Examine the data in the CUST_NAME column of the CUSTOMERS table:
CUST_NAME
---------------------
Renske Ladwig
Jason Mallin
Samuel McCain
Allan MCEwen
Irene Mikkilineni
Julia Nayer
You want to display the CUST_NAME values where the last name starts with Mc or MC.
Which two WHERE clauses give the required result?
- A. WHERE UPPER(SUBSTR(cust_name, INSTR(cust_name,' ') + 1)) LIKE UPPER('MC%')
- B. WHERE SUBSTR(cust_name, INSTR(cust_name,' ') + 1) LIKE 'Mc%' OR 'MC%'
- C. WHERE INITCAP(SUBSTR(cust_name, INSTR(cust_name,' ') + 1)) IN ('MC%','Mc%')
- D. WHERE SUBSTR(cust_name, INSTR(cust_name,' ') + 1) LIKE 'Mc%'
- E. WHERE INITCAP(SUBSTR(cust_name, INSTR(cust_name,' ') + 1)) LIKE 'Mc%'
Answer: A,E
NEW QUESTION # 35
In the customers table, the CUST_CITY column contains the value 'Paris' for the CUST_FIRST_NAME 'Abigail'.
Evaluate the following query:
What would be the outcome?
- A. Abigail Pa
- B. Abigail IS
- C. An error message
- D. Abigail PA
Answer: A
NEW QUESTION # 36
Which two statements are true about selecting related rows from two tables based on entity relationship diagram (ERD)?
- A. Relating data from a table with data from the same table is implemented with a self join.
- B. Every relationship between the two tables must be implemented in a Join condition.
- C. Rows from unrelated tables cannot be joined.
- D. An inner join relates rows within the same table.
- E. Implementing a relationship between two tables might require joining additional tables.
Answer: A,E
NEW QUESTION # 37
Which two are true?
- A. INSTR finds the offset within a string of a single character only.
- B. INSTR finds the offset within a character string, starting from position 0.
- C. FLOOR returns the largest positive integer less than or equal to a specified number.
- D. FLOOR returns the largest integer less than or equal to a specified number.
- E. CONCAT joins two or more character strings together.
- F. CONCAT joins two character strings together.
Answer: D,E
Explanation:
The CONCAT function and FLOOR function in Oracle SQL have specific behaviors:
A). CONCAT function joins two or more character strings into one string, making this statement true.
B). FLOOR function returns the largest integer that is less than or equal to the specified number, making this statement true.
C). While CONCAT can join two strings together, this statement is incomplete as it can join more than two.
D). INSTR can find the offset of a substring within a string, not just a single character.
E). INSTR starts searching the string from position 1 in Oracle SQL, not position 0.
F). FLOOR does return the largest integer less than or equal to the specified number, but it can be any integer, not just positive ones.
References:
* Oracle Database SQL Language Reference, 12c Release 1 (12.1): "Single-Row Functions"
NEW QUESTION # 38
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