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Preparation Guide for Oracle 1Z0-071: Oracle Database SQL Exam
Introduction
Oracle is an American international information technology corporation located in California. Oracle is a multinational organisation that designs enterprise software systems. Oracle offers a range of cloud-based software and systems, as well as hardware and resources that support companies expand their operations. The emphasis of Oracle apps is on data analytics, market research, IT processes management, business resource planning, security and new technology. Oracle is well regarded for its hardware and software databases. The Oracle Database is one of the most common corporate database goods, a relational database management system (DBMS).
Oracle also designs and creates software and technology for middle-level database management systems, human capital management systems (HCMs), client relationship management systems (CRMs), company resource planning systems (ERPs) and supply chain management systems (SCM). Oracle Database, also referred to as Oracle DBMS, is a multi-model database management framework. It is an extensively used database to conduct database analysis and data retrieval functions. Different providers make Oracle Database usable on the server, premises or a hybrid software implementation. This guide gives the complete understanding of 1Z0-071 dumps and 1Z0-071 practice exams.
NEW QUESTION 129
Which two statements are true regarding constraints? (Choose two.)
- A. All the constraints can be defined at the column level as well as the table level
- B. A constraint is enforced only for the INSERT operation on a table.
- C. A constraint can be disabled even if the constraint column contains data.
- D. A column with the UNIQUE constraint can contain NULL.
- E. A foreign key cannot contain NULL values.
Answer: C,D
NEW QUESTION 130
Evaluate the following statement.
Which statement is true regarding the evaluation of rows returned by the subquery in the INSERT statement?
- A. They are evaluated by the first WHEN clause. If the condition is true, then the row would be evaluated by the subsequent WHEN clauses.
- B. They are evaluated by the first WHEN clause. If the condition is false, then the row would be evaluated by the subsequent WHEN clauses.
- C. The insert statement would give an error because the ELSE clause is not present for support in case none of WHEN clauses are true.
- D. They are evaluated by all the three WHEN clauses regardless of the results of the evaluation of any other WHEN clause.
Answer: D
Explanation:
http://psoug.org/definition/WHEN.htm
NEW QUESTION 131
Which three statements are true about sequences in a single instance Oracle database? (Choose three.)
- A. A sequence can issue duplicate values
- B. Sequences can always have gaps
- C. A sequence number that was allocated can be rolled back if a transaction fails
- D. A sequence can only be dropped by a DBA
- E. A sequence's unallocated cached value are lost if the instance shuts down
- F. Two or more tables cannot have keys generated from the same sequence
Answer: B,C,E
Explanation:
Explanation/Reference: https://docs.oracle.com/cd/B19306_01/server.102/b14200/statements_6015.htm
NEW QUESTION 132
Examine the structure of the EMPLOYEES table.
There is a parent-child relationship between EMPLOYEE_ID and MANAGER_ID.
You want to display the last names and manager IDs of employees who work for the same manager as the employee whose EMPLOYEE_ID is 123.
Which query provides the correct output?
- A. SELECT e.last_name, e.manager_idFROM employees e RIGHT OUTER JOIN employees mon (e.employee_id = m.employee_id)WHERE e.employee_id = 123;
- B. SELECT e.last_name, m.manager_idFROM employees e LEFT OUTER JOIN employees mon (e.employee_id = m.manager_id)WHERE e.employee_id = 123;
- C. SELECT m.last_name, e.manager_idFROM employees e LEFT OUTER JOIN employees mon (e.manager_id = m.manager_id)WHERE e.employee_id = 123;
- D. SELECT e.last_name, m.manager_idFROM employees e RIGHT OUTER JOIN employees mon (e.manager_id = m.employee_id)AND e.employee_id = 123;
Answer: C
NEW QUESTION 133
Examine the structure of the ORDERS table:
You want to find the total value of all the orders for each year and issue this command:
SQL> SELECT TO_CHAR(order_date,'rr'), SUM(order_total) FROM orders
GROUP BY TO_CHAR(order_date, 'yyyy');
Which statement is true regarding the result? (Choose the best answer.)
- A. It executes successfully and gives the correct output.
- B. It return an error because the datatype conversion in the SELECT list does not match the data type conversion in the GROUP BY clause.
- C. It returns an error because the TO_CHAR function is not valid.
- D. It executes successfully but does not give the correct output.
Answer: B
NEW QUESTION 134
View the Exhibit and examine PRODUCTS and ORDER_ITEMS tables.
You executed the following query to display PRODUCT_NAME and the number of times the product has been ordered:
SELECT p.product_name, i.item_cnt
FROM (SELECT product_id, COUNT (*) item_cnt
FROM order_items
GROUP BY product_id) i RIGHT OUTER JOIN products p
ON i.product_id = p.product_id;
What would happen when the above statement is executed?
- A. The statement would execute successfully to produce the required output.
- B. The statement would not execute because the GROUP BY clause cannot be used in the inline view.
- C. The statement would not execute because the ITEM_CNT alias cannot be displayed in the outer query.
- D. The statement would not execute because inline views and outer joins cannot be used together.
Answer: A
NEW QUESTION 135
Table EMPLOYEES contains columns including EMPLOYEE_ID, JOB_ID and SALARY.
Only the EMPLOYEE_ID column is indexed.
Rows exist for employees 100 and 200.
Examine this statement:
Which two statements are true? (Choose two.)
- A. Employees 100 and 200 will have the same JOB_ID as before the update command
- B. Employees 100 will have JOB_ID set to the same value as the JOB_ID of employee 200
- C. Employee 200 will have SALARY set to the same value as the SALARY of employee 100
- D. Employees 100 and 200 will have the same SALARY as before the update command
- E. Employee 200 will have JOB_ID set to the same value as the JOB_ID of employee 100
- F. Employee 100 will have SALARY set to the same value as the SALARY of employee 200
Answer: B,F
NEW QUESTION 136
Which two statements are true about Data Manipulation Language (DML) statements?
- A. An INSERT INTO... VALUES..... statement can add a single row based on multiple conditions on a table.
- B. A DELETE FROM.....statement can remove multiple rows based on multiple conditions on a table.
- C. An UPDATE... SET...statement can modify multiple rows based on multiple conditions on a table.
- D. A DELETE FROM.....statement can remove rows based on only a single condition on a table.
- E. An UPDATE....SET....statement can modify multiple rows based on only a single condition on a table.
- F. An INSERTINTO...VALUES..statement can add multiple rows per execution to a table.
Answer: B,C
Explanation:
Explanation/Reference:
References:
http://www.techonthenet.com/sql/and_or.php
NEW QUESTION 137
Which two are true about dropping columns from a table?
- A. A primary key column cannot be dropped.
- B. A column that is referenced by another column in any other table cannot be dropped.
- C. A column must be set as unused before it is dropped from a table.
- D. Multiple columns can be dropped simultaneously using the ALTER TABLE command.
- E. A column drop is implicitly committed.
- F. A column can be removed only if it contains no data.
Answer: A,D
NEW QUESTION 138
Examine the structure of the SHIPMENTS table:
You want to generate a report that displays the PO_IDand the penalty amount to be paid if the SHIPMENT_DATEis later than one month from the PO_DATE. The penalty is $20 per day.
Evaluate the following two queries:
Which statement is true regarding the above commands?
- A. Only the first query executes successfully and gives the correct result.
- B. Both execute successfully and give correct results.
- C. Only the second query executes successfully but gives a wrong result.
- D. Only the first query executes successfully but gives a wrong result.
- E. Only the second query executes successfully and gives the correct result.
Answer: A
NEW QUESTION 139
View the Exhibit and examine the structure of ORDERS and ORDER_ITEMS tables.
ORDER_ID is the primary key in the ORDERS table. It is also the foreign key in the ORDER_ITEMS table wherein it is created with the ON DELETE CASCADE option.
Which DELETE statement would execute successfully?
- A. DELETE order_idFROM ordersWHERE order_total < 1000;
- B. DELETEFROM ordersWHERE (SELECT order_idFROM order_items);
- C. DELETE orders o, order_items IWHERE o.order_id = i.order_id;
- D. DELETE ordersWHERE order_total < 1000;
Answer: B
NEW QUESTION 140
Examine the structure of the BOOKS_TRANSACTIONStable:
You want to display the member IDs, due date, and late fee as $2 for all transactions.
Which SQL statement must you execute?
- A. SELECT member_id 'MEMBER ID', due_date 'DUE DATE', '$2 AS LATE FEE' FROM BOOKS_TRANSACTIONS;
- B. SELECT member_id AS "MEMBER ID", due_date AS "DUE DATE", '$2' AS "LATE FEE" FROM BOOKS_TRANSACTIONS
- C. SELECT member_id AS "MEMBER ID", due_date AS "DUE DATE", $2 AS "LATE FEE" FROM BOOKS_TRANSACTIONS
- D. SELECT member_id AS MEMBER_ID, due_date AS DUE_DATE, $2 AS LATE_FEE FROM BOOKS_TRANSACTIONS
Answer: B
NEW QUESTION 141
Examine the description of the PRODUCTS table:
Which three queries use valid expressions?
- A. SELECT product_id,unit_price || "Discount", unit_price + surcharge-discount FROM products;
- B. SELECT produet_id, unit_pricer, 5 "Discount",unit_price+surcharge-discount FROM products;
- C. SELECT product_id, (unit_price * 0.15 / (4.75 + 552.25)) FROM products;
- D. SELEGT product_id, unit_price, unit_price + surcharge FROM products;
- E. SPLECT product_id, expiry_date * 2 FROM products;
- F. SELECT ptoduct_id, (expiry_date-delivery_date) * 2 FROM products;
Answer: C,D,F
NEW QUESTION 142
View the exhibit and examine the structure of the SALES, CUSTOMERS, PRODUCTS and TIMES tables.
The PROD_ID column is the foreign key in the SALES table, which references the PRODUCTS table.
Similarly, the CUST_ID and TIME_ID columns are also foreign keys in the SALES table referencing the CUSTOMERS and TIMES tables, respectively.
Evaluate the following CREATE TABLE command:
CREATE TABLE new_sales (prod_id, cust_id, order_date DEFAULT SYSDATE)
AS
SELECT prod_id, cust_id, time_id
FROM sales;
Which statement is true regarding the above command?
- A. The NEW_SALES table would not get created because the column names in the CREATE TABLE command and the SELECT clause do not match.
- B. The NEW_SALES table would get created and all the NOT NULL constraints defined on the specified columns would be passed to the new table.
- C. The NEW_SALES table would not get created because the DEFAULT value cannot be specified in the column definition.
- D. The NEW_SALES table would get created and all the FOREIGN KEY constraints defined on the specified columns would be passed to the new table.
Answer: B
NEW QUESTION 143
Examine the description of the PRODCTS table which contains data:
Which two are true?
- A. The PROD NAME column cannot have a DEFAULT clause added to it.
- B. The PROD ID column can be renamed.
- C. The EXPIRY DATE column cannot be dropped.
- D. The EXPIRY DATE column data type can be changed to TIME STAMP.
- E. The PROD_ ID column data type can be changed to VARCHAR2 (2).
Answer: B,D
NEW QUESTION 144
Examine this description of the PRODUCTStable:
Rows exist in this table with data in all the columns. You put the PRODUCTStable in read-only mode.
Which three commands execute successfully on PRODUCTS?
- A. ALTER TABLE products DROP UNUSED COLUMNS;
- B. TRUNCATE TABLE products;
- C. ALTER TABLE products DROP COLUMN expiry_date;
- D. ALTER TABLE products SET UNUSED (expiry_date);
- E. CREATE INDEX price_idx ON products (price);
- F. DROP TABLE products;
Answer: B,E,F
NEW QUESTION 145
Which three statements are true? (Choose three.)
- A. The data dictionary is created and maintained by the database administrator.
- B. The USER_CONS_COLUMNS view should be queried to find the names of columns to which constraints apply.
- C. Views with the same name but different prefixes, such as DBA, ALL and USER, reference the same base tables from the data dictionary.
- D. The usernames of all users including database administrators are stored in the data dictionary.
- E. Both USER_OBJECTS and CAT views provide the same information about all objects that are owned by the user.
- F. Data dictionary views consist of joins of dictionary base tables and user-defined tables.
Answer: B,C,D
Explanation:
References:
https://docs.oracle.com/cd/B10501_01/server.920/a96524/c05dicti.htm
NEW QUESTION 146
The user SCOTT who is the owner of ORDERS and ORDER_ITEMS tables issues the following GRANT command:
GRANT ALL
ON orders, order_items
TO PUBLIC;
What correction needs to be done to the above statement?
- A. PUBLIC should be replaced with specific usernames.
- B. Separate GRANT statements are required for ORDERS and ORDER_ITEMS tables.
- C. ALL should be replaced with a list of specific privileges.
- D. WITH GRANT OPTION should be added to the statement.
Answer: B
Explanation:
References:
http://docs.oracle.com/javadb/10.8.3.0/ref/rrefsqljgrant.html
NEW QUESTION 147
You must create a SALES table with these column specifications and data types: (Choose the best answer.) SALESID: Number STOREID: Number ITEMID: Number QTY: Number, should be set to 1 when no value is specified SLSDATE: Date, should be set to current date when no value is specified PAYMENT: Characters up to 30 characters, should be set to CASH when no value is specified Which statement would create the table?
- A. Create Table sales(salesid NUMBER (4),Storeid NUMBER (4),Itemid NUMBER (4),QTY NUMBER DEFAULT 1,Slsdate DATE DEFAULT SYSDATE,payment VARCHAR2(30) DEFAULT 'CASH');
- B. CREATE TABLE Sales(SALESID NUMBER (4),STOREID NUMBER (4),ITEMID
NUMBER (4),QTY NUMBER DEFAULT = 1,SLSDATE DATE DEFAULT
'SYSDATE',PAYMENT VARCHAR2(30) DEFAULT CASH); - C. CREATE TABLE Sales(SALESID NUMBER (4),STOREID NUMBER (4),ITEMID
NUMBER (4),QTY NUMBER DEFAULT = 1,SLSDATE DATE DEFAULT
SYSDATE,PAYMENT VARCHAR2(30) DEFAULT = "CASH"); - D. CREATE TABLE Sales(SALESID NUMBER (4),STOREID NUMBER (4),ITEMID
NUMBER (4),qty NUMBER DEFAULT = 1,SLSDATE DATE DEFAULT
SYSDATE,PAYMENT VARCHAR2(30) DEFAULT = "CASH");
Answer: A
NEW QUESTION 148
Examine this statement:
CREATE TABTE orders
(sarial_no NUMBER UNIQUE,
order_id NUMBER PRIMARY KEY ,
order_date DATE NOT NULL,
status VARCHAR2 (10) CHECK (status IN ('CREDIT', 'CASH')),
product_id NUMBER REFERENCES products (product_id),
order_ total NUMBER);
On which two columns of the table will an index be created automatically?
- A. STATUS
- B. ORDER TOTAL
- C. ORDER_DATE
- D. SERIAL_NO
- E. PRODUCT_ ID
- F. ORDER_ ID
Answer: D,F
NEW QUESTION 149
......
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