Refined 1Z0-071 Exam Questions and Answers 2019

Exam Code: 1Z0-071 (1z0 071 dumps), Exam Name: Oracle Database 12c SQL, Certification Provider: Oracle Certifitcation, Free Today! Guaranteed Training- Pass 1Z0-071 Exam.

Free demo questions for Oracle 1Z0-071 Exam Dumps Below:

NEW QUESTION 1
Which statement is true about SQL query processing in an Oracle database instance? (Choose the best answer.)

  • A. During parsing, a SQL statement containing literals in the WHERE clause that has been executed by any session and which is cached in memory, is always reused for the current execution.
  • B. During executing, the oracle server may read data from storage if the required data is not already in memory.
  • C. During row source generation, rows that satisfy the query are retrieved from the database and stored in memory.
  • D. During optimization, execution plans are formulated based on the statistics gathered by the database instance, and the lowest cost plan is selected for execution.

Answer: B

NEW QUESTION 2
Evaluate the following query:
1Z0-071 dumps exhibit
Which is the correct output of the above query?

  • A. +00-300, +54-02,+00 11:12:10.123457
  • B. +00-300,+00-650,+00 11:12:10.123457
  • C. +25-00, +54-02, +00 11:12:10.123457
  • D. +25-00,+00-650,+00 11:12:10.123457

Answer: C

NEW QUESTION 3
When does a transaction complete? (Choose all that apply.)

  • A. When a PL/SQL anonymous block is executed
  • B. When a DELETE statement is executed
  • C. When a data definition language statement is executed
  • D. When a TRUNCATE statement is executed after the pending transaction
  • E. When a ROLLBACK command is executed

Answer: CDE

NEW QUESTION 4
Which two statements are true regarding constraints?

  • A. A table can have only one primary key and one foreign key.
  • B. A table can have only one primary key but multiple foreign keys.
  • C. Only the primary key can be defined at the column and table levels.
  • D. The foreign key and parent table primary key must have the same name.
  • E. Both primary key and foreign key constraints can be defined at both column and table levels.

Answer: BE

NEW QUESTION 5
See the Exhibit and examine the structure of the PROMOTIONS table:
1Z0-071 dumps exhibit
Using the PROMOTIONS table,
you need to find out the average cost for all promos in the range $0-2000 and $2000-5000 in category A.
You issue the following SQL statements:
1Z0-071 dumps exhibit
What would be the outcome?

  • A. It generates an error because multiple conditions cannot be specified for the WHEN clause.
  • B. It executes successfully and gives the required result.
  • C. It generates an error because CASE cannot be used with group functions.
  • D. It generates an error because NULL cannot be specified as a return value.

Answer: B

Explanation: CASE Expression
Facilitates conditional inquiries by doing the work of an IF-THEN-ELSE statement:
CASE expr WHEN comparison_expr1 THEN return_expr1 [WHEN comparison_expr2 THEN return_expr2
WHEN comparison_exprn THEN return_exprn ELSE else_expr]
END

NEW QUESTION 6
Which task can be performed by using a single Data Manipulation Language (DML) statement?

  • A. adding a column constraint when inserting a row into a table
  • B. adding a column with a default value when inserting a row into a table
  • C. removing all data only from one single column on which a unique constraint is defined
  • D. removing all data only from one single column on which a primary key constraint is defined

Answer: C

NEW QUESTION 7
View the Exhibit and examine the details of the PRODUCT_INFORMATION table.
1Z0-071 dumps exhibit
You have the requirement to display PRODUCT_NAME and LIST_PRICE from the table where the CATEGORYJD column has values 12 or 13, and the SUPPLIER_ID column has the value 102088. You executed the following SQL statement:
SELECT product_name, list_price FROM product_information
WHERE (category_id = 12 AND category_id = 13) AND supplier_id = 102088; Which statement is true regarding the execution of the query?

  • A. It would not execute because the entire WHERE clause is not enclosed within parentheses.
  • B. It would execute but would return no rows.
  • C. It would not execute because the same column has been used twice with the AND logical operator.
  • D. It would execute and return the desired.

Answer: B

NEW QUESTION 8
Which three statements are true about the ALTER TABLE....DROP COLUMN.... command?

  • A. A column can be dropped only if it does not contain any data.
  • B. A column can be dropped only if another column exists in the table.
  • C. A dropped column can be rolled back.
  • D. The column in a composite PRIMARY KEY with the CASCADE option can be dropped.
  • E. A parent key column in the table cannot be dropped.

Answer: BDE

NEW QUESTION 9
Evaluate the following SELECT statement and view the exhibit to examine its output:
SELECT constraint_name, constraint_type, search_condition, r_constraint_name, delete_rule, status, FROM user_constraints
WHERE table_name = 'ORDERS'; CONSTRAINT_NAME
CON SEARCH_CONDITION R_CONSTRAINT_NAME DELETE_RULE
STATUS ORDER_DATE_NN C
"ORDER_DATE" IS NOT NULL ENABLED ORDER_CUSTOMER_ID_NN C
"CUSTOMER_ID" IS NOT NULL ENABLED ORDER_MODE_LOV C
order _mode in ('direct', 'online') ENABLED
ORDER TOTAL MIN C
order total >= 0 ENABLED ORDER PK
P ENABLED
ORDERS CUSTOMER ID R
CUSTOMERS ID SET NULL ENABLED
ORDERS SALES REP R
EMP EMP ID SET NULL ENABLED
Which two statements are true about the output? (Choose two.)

  • A. The R_CONSTRAINT_NAME column gives the alternative name for the constraint.
  • B. In the second column, 'c' indicates a check constraint.
  • C. The STATUS column indicates whether the table is currently in use.
  • D. The column DELETE_RULE decides the state of the related rows in the child table when the corresponding row is deleted from the parent table.

Answer: BD

NEW QUESTION 10
You issued this command:
CHOOSE THREE
SQL > DROP TABLE employees; Which three statements are true?

  • A. Sequences used in the EMPLOYEES table become invalid.
  • B. If there is an uncommitted transaction in the session, it is committed.
  • C. All indexes and constraints defined on the table being dropped are also dropped.
  • D. The space used by the EMPLOYEES table is always reclaimed immediately.
  • E. The EMPLOYEES table can be recovered using the ROLLBACK command.
  • F. The EMPLOYEES table may be moved to the recycle bin.

Answer: BCF

NEW QUESTION 11
Examine the structure of the MEMBERS table: NameNull?Type
------------------ --------------- ------------------------------ MEMBER_IDNOT NULLVARCHAR2 (6)
FIRST_NAMEVARCHAR2 (50)
LAST_NAMENOT NULLVARCHAR2 (50)
ADDRESSVARCHAR2 (50)
You execute the SQL statement:
SQL > SELECT member_id, ' ' , first_name, ' ' , last_name "ID FIRSTNAME LASTNAME " FROM members;
What is the outcome?

  • A. It fails because the alias name specified after the column names is invalid.
  • B. It fails because the space specified in single quotation marks after the first two column names is invalid.
  • C. It executes successfully and displays the column details in a single column with only the alias column heading.
  • D. It executes successfully and displays the column details in three separate columns and replaces only the last column heading with the alias.

Answer: D

NEW QUESTION 12
Which statement is true about an inner join specified in the WHERE clause of a query?

  • A. It must have primary-key and foreign-key constraints defined on the columns used in the join condition.
  • B. It requires the column names to be the same in all tables used for the join conditions.
  • C. It is applicable for equijoin and nonequijoin conditions.
  • D. It is applicable for only equijoin conditions.

Answer: C

NEW QUESTION 13
View the Exhibit and examine the structure of the PRODUCT_INFORMATION and INVENTORIES tables.
1Z0-071 dumps exhibit
You have a requirement from the supplies department to give a list containing PRODUCT_ID, SUPPLIER_ID, and QUANTITY_ON_HAND for all the products wherein QUANTITY_ON_HAND is less than five.
Which two SQL statements can accomplish the task? (Choose two.)

  • A. SELECT i.product_id, i.quantity_on_hand, pi.supplier_idFROM product_information pi JOIN inventories iON (pi.product_id=i.product_id)WHERE quantity_on_hand < 5;
  • B. SELECT product_id, quantity_on_hand, supplier_idFROM product_informationNATURAL JOIN inventories AND quantity_on_hand < 5;
  • C. SELECT i.product_id, i.quantity_on_hand, pi.supplier_idFROM product_information pi JOIN inventories iON (pi.product_id=i.product_id) AND quantity_on_hand < 5;
  • D. SELECT i.product_id, i.quantity_on_hand, pi.supplier_idFROM product_information pi JOINinventories iON (pi.product_id=i.product_id)USING (product_id) AND quantity_on_hand < 5;

Answer: AC

NEW QUESTION 14
View the Exhibit and examine the structure of the EMP table which is not partitioned and not an index-organized table. (Choose two.)
1Z0-071 dumps exhibit
Evaluate this SQL statement: ALTER TABLE emp
DROP COLUMN first_name; Which two statements are true?

  • A. The FIRST_NAME column can be dropped even if it is part of a composite PRIMARY KEY provided the CASCADE option is added to the SQL statement.
  • B. The FIRST_NAME column would be dropped provided at least one column remains in the table.
  • C. The FIRST_NAME column would be dropped provided it does not contain any data.
  • D. The drop of the FIRST_NAME column can be rolled back provided the SET UNUSED option is added to the SQL statement.

Answer: B

NEW QUESTION 15
Which two statements are true regarding subqueries? (Choose two.)

  • A. A subquery can appear on either side of a comparison operator.
  • B. Only two subqueries can be placed at one level.
  • C. A subquery can retrieve zero or more rows.
  • D. A subquery can be used only in SQL query statements.
  • E. There is no limit on the number of subquery levels in the WHERE clause of a SELECT statement.

Answer: AC

NEW QUESTION 16
Which two are the minimal requirements for a self-join? (Choose two.)

  • A. Only equijoin conditions may be used in the query.
  • B. Outer joins must not be used in the query.
  • C. There must be a condition on which the self-join is performed.
  • D. No other condition except the self-join may be specified.
  • E. The table used for the self-join must have two different alias names in the query.

Answer: CE

NEW QUESTION 17
View the exhibit and examine the description of the EMPLOYEES table. (Choose two.)
1Z0-071 dumps exhibit
You executed this SQL statement: SELECT first_name, department_id, salary FROM employees
ORDER BY department_id, first_name, salary desc; Which two statements are true regarding the result?

  • A. The values in the SALARY column would be returned in descending order for all employees having the same value in the DEPARTMENT_ID and FIRST_NAME column.
  • B. The values in the FIRST_NAME column would be returned in ascending order for all employees having the same value in the DEPARTMENT_ID column.
  • C. The values in the SALARY column would be returned in descending order for all employees having the same value in the DEPARTMENT_ID column.
  • D. The values in the all columns would be returned in descending order.
  • E. The values in the FIRST_NAME column would be returned in descending order for all employees having the same value in the DEPARTMENT_ID column.

Answer: AB

NEW QUESTION 18
Examine the types and examples of relationship that follows: (Choose the best answer.)
1 One-to-one a) teacher to Student
2 One-to-many b) Employees to Manager
3 Many-to-one c) Person to SSN
4 Many-to-many d) Customers to Products
Which option indicates correctly matched relationships?

  • A. 1-d, 2-b, 3-a, and 4-c
  • B. 1-c, 2-d, 3-a, and 4-b
  • C. 1-a, 2-b, 3-c, and 4-d
  • D. 1-c, 2-a, 3-b, and 4-d

Answer: C

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