Download Oracle Datbase 12c SQL.1z0-071.TestKing.2019-02-20.116q.vcex

Vendor: Oracle
Exam Code: 1z0-071
Exam Name: Oracle Datbase 12c SQL
Date: Feb 20, 2019
File Size: 11 MB
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Demo Questions

Question 1
Which three statements are true regarding the WHERE and HAVING clauses in a SQL statement? (Choose three.)
  1. WHERE and HAVING clauses cannot be used together in a SQL statement.
  2. The HAVING clause conditions can have aggregate functions.
  3. The HAVING clause conditions can use aliases for the columns.
  4. The WHERE clause is used to exclude rows before the grouping of data.
  5. The HAVING clause is used to exclude one or more aggregated results after grouping data.
Correct answer: ABD
Question 2
Which statement is true regarding external tables?
  1. The CREATE TABLE AS SELECT statement can be used to upload data into a normal table in the database from an external table.
  2. The data and metadata for an external table are stored outside the database.
  3. The default REJECT LIMIT for external tables is UNLIMITED.
  4. ORACLE_LOADER and ORACLE_DATAPUMP have exactly the same functionality when used with an external table.
Correct answer: A
Explanation:
References:https://docs.oracle.com/cd/B28359_01/server.111/b28310/tables013.htm
References:
https://docs.oracle.com/cd/B28359_01/server.111/b28310/tables013.htm
Question 3
Which two statements are true about Data Manipulation Language (DML) statements?
  1. An INSERT INTO...VALUES.. statement can add multiple rows per execution to a table.
  2. An UPDATE... SET... statement can modify multiple rows based on multiple conditions on a table.
  3. A DELETE FROM..... statement can remove rows based on only a single condition on a table.
  4. An INSERT INTO... VALUES..... statement can add a single row based on multiple conditions on a table.
  5. A DELETE FROM..... statement can remove multiple rows based on multiple conditions on a table.
  6. An UPDATE....SET.... statement can modify multiple rows based on only a single condition on a table.
Correct answer: BE
Explanation:
References:http://www.techonthenet.com/sql/and_or.php
References:
http://www.techonthenet.com/sql/and_or.php
Question 4
Which two statements are true regarding roles? (Choose two.)
  1. A role can be granted to itself.
  2. A role can be granted to PUBLIC.
  3. A user can be granted only one role at any point of time.
  4. The REVOKE command can be used to remove privileges but not roles from other users.
  5. Roles are named groups of related privileges that can be granted to users or other roles.
Correct answer: BE
Explanation:
References:http://docs.oracle.com/cd/E25054_01/network.1111/e16543/authorization.htm#autoId28
References:
http://docs.oracle.com/cd/E25054_01/network.1111/e16543/authorization.htm#autoId28
Question 5
Evaluate the following statement. 
  
Which statement is true regarding the evaluation of rows returned by the subquery in the INSERT statement?
  1. They are evaluated by all the three WHEN clauses regardless of the results of the evaluation of any other WHEN clause.
  2. They are evaluated by the first WHEN clause. If the condition is true, then the row would be evaluated by the subsequent WHEN clauses.
  3. They are evaluated by the first WHEN clause. If the condition is false, then the row would be evaluated by the subsequent WHEN clauses.
  4. The insert statement would give an error because the ELSE clause is not present for support in case none of WHEN clauses are true.
Correct answer: A
Explanation:
References:http://psoug.org/definition/WHEN.htm
References:
http://psoug.org/definition/WHEN.htm
Question 6
Examine the structure of the MEMBERS table:
You execute the SQL statement:
SQL > SELECT member_id, ' ' , first_name, ' ' , last_name "ID FIRSTNAME LASTNAME " FROM members; 
What is the outcome?
  1. It fails because the alias name specified after the column names is invalid.
  2. It fails because the space specified in single quotation marks after the first two column names is invalid.
  3. It executes successfully and displays the column details in a single column with only the alias column heading.
  4. It executes successfully and displays the column details in three separate columns and replaces only the last column heading with the alias.
Correct answer: D
Question 7
You issue the following command to drop the PRODUCTS table:
SQL > DROP TABLE products; 
Which three statements are true about the implication of this command? (Choose three.)
  1. All data along with the table structure is deleted.
  2. A pending transaction in the session is committed.
  3. All indexes on the table remain but they are invalidated.
  4. All views and synonyms on the table remain but they are invalidated.
  5. All data in the table is deleted but the table structure remains.
Correct answer: ABD
Question 8
You execute the following commands:
SQL > DEFINE hiredate = '01-APR-2011' 
SQL >SELECT employee_id, first_name, salary 
    FROM employees 
    WHERE hire_date > '&hiredate' 
    AND manager_id > &mgr_id; 
For which substitution variables are you prompted for the input?
  1. none, because no input required
  2. both the substitution variables ''hiredate' and 'mgr_id'.
  3. only hiredate'
  4. only 'mgr_id'
Correct answer: D
Question 9
Evaluate the following two queries:
  
Which statement is true regarding the above two queries?
  1. Performance would improve in query 2 only if there are null values in the CUST_CREDIT_LIMIT column.
  2. There would be no change in performance.
  3. Performance would degrade in query 2.
  4. Performance would improve in query 2.
Correct answer: B
Question 10
View the exhibit and examine the structure of the EMPLOYEES table. 
  
You want to display all employees and their managers having 100 as the MANAGER_ID. You want the output in two columns: the first column would have the LAST_NAME of the managers and the second column would have LAST_NAME of the employees.
Which SQL statement would you execute? 
  1. SELECT m.last_name "Manager", e.last_name "Employee"
    FROM employees m JOIN employees e
    ON m.employee_id = e.manager_id
    WHERE m.manager_id = 100;
  2. SELECT m.last_name "Manager", e.last_name "Employee"
    FROM employees m JOIN employees e
    ON m.employee_id = e.manager_id
    WHERE e.manager_id = 100;
  3. SELECT m.last_name "Manager", e.last_name "Employee"
    FROM employees m JOIN employees e
    ON e.employee_id = m.manager_id
    WHERE m.manager_id = 100;
  4. SELECT m.last_name "Manager", e.last_name "Employee"
    FROM employees m JOIN employees e
    WHERE m.employee_id = e.manager_id AND e.manager_id = 100
Correct answer: B
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