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Oracle 1z1-071 exam is a certification exam that tests the ability of individuals to use Oracle SQL. 1z0-071 exam is designed to assess the candidate's knowledge of SQL language and its application in Oracle database management. In today's constantly evolving technological world, this certification has become one of the most sought-after certifications to enhance one's career in database management.
Oracle 1z0-071 exam covers a broad range of topics related to SQL development and database management, including SQL queries, data manipulation, data control language, data definition language, transactions, and database security. Candidates must demonstrate their ability to write complex SQL queries, manage database objects, and perform database administration tasks. 1z0-071 exam is challenging, but passing it can open up many opportunities for IT professionals in various industries.
Oracle 1z1-071 (Oracle Database SQL) Certification Exam is an industry-recognized certification program that validates an individual's skills and knowledge in SQL database. 1z0-071 exam is designed to test the candidate's ability to manage, maintain, and manipulate data using SQL language. Oracle Database SQL certification is highly valued in the IT industry, and passing the exam opens up a range of career opportunities for individuals.
NEW QUESTION # 73
Which two are true about constraints?
- A. A column with a unique constraint can contain a null value.
- B. A constraint can be disabled even if the constrained column contains data.
- C. Constraints are enforced only during insert operations.
- D. All constraints can be defined at the table or column level.
- E. A column with a FOREIGN key constraint can never contain a null value.
Answer: A,B
NEW QUESTION # 74
View the Exhibit and examine the data in the employees table.
You want to generate a report showing the total compensation paid to each employee to date.
You issue the following query:
What is the outcome?
- A. It executes successfully but does not give the correct output.
- B. It executes successfully and gives the correct output.
- C. It generates an error because the usage of the round function in the expression is not valid
- D. It generates an error because the alias is not valid.
- E. It generates an error because the concatenation operator can be used to combine only two items.
Answer: A
NEW QUESTION # 75
View the Exhibit and examine the structure of CUSTOMERStable.
Evaluate the following query:
Which statement is true regarding the above query?
- A. It produces an error because conditions on the CUST_CREDIT_LIMITcolumn are not valid.
- B. It produces an error because the condition on the CUST_CITYcolumn is not valid.
- C. It produces an error because the condition on the CUST_FIRST_NAMEcolumn is not valid.
- D. It executes successfully.
Answer: D
NEW QUESTION # 76
You create a table by using this command:
CREATE TABLE rate_list (rate NUMBER(6,2));
Which two are true about executing statements?
- A. INSERT INTO rate_list VALUES (-10) produces an error.
- B. INSERT INTO rate_list VALUES (-99.99) inserts the value as 99.99.
- C. INSERT INTO rate_list VALUES (87654. 556) inserts the value as 87654.6.
- D. INSERT INTO rate_list VALUES (-.9) inserts the value as -.9.
- E. INSERT INTO rate_list VALUES (0.551) inserts the value as .55.
- F. INSERT INTO rate_list VALUES (0.999) produces an error.
Answer: D,E
Explanation:
The behavior of data insertion into a table with a specific numeric format in Oracle Database 12c can be explained as follows:
A . INSERT INTO rate_list VALUES (-.9) inserts the value as -.9: This is correct. The value -.9 is within the precision defined by the table column (NUMBER(6,2)), where 6 is the total number of digits (including both sides of the decimal point), and 2 is the number of digits after the decimal point.
E . INSERT INTO rate_list VALUES (0.551) inserts the value as .55: Oracle rounds the number to the nearest value that fits the specified scale of 2. Thus, 0.551 rounds down to 0.55.
Reference:
Oracle Database SQL Language Reference 12c, particularly sections on data types and numeric precision.
NEW QUESTION # 77
Examine this statement which executes successfully:
Which three are true?
- A. Regardless of salary,only if the employee id is less than 125,insert EMPLOYEE_ID,NANAGER_ID,SALARY into the MGR_HISTORY table.
- B. Only if the salary is 20000 or less and the employee id is less than 125,insert EMPLOYEE_ID,MANAGER_ID,and SALARY into the MGR_HISTORY table.
- C. If the salary is 20000 or less and the employee id is less than 125,insert EMPLOYEE_ID,HIRE_DATE,and SALARY into the SAL_HISTORY table.
- D. Regardless of salary and employee id,insert EMPLOYEE_ID,MANAGER_ID,and SALARY into the MGR_HISTORY table.
- E. If the salary is more than 20000 and the employee is less than 125,insert EMPLOYEE_ID and SALARY into the SPECIAL_SAL table.
- F. Only if the salary is 20000 or less and the employee id is 125 or higher,insert EMPLOYEE_ID,MANAGER_ID,and SALARY into the MDR_HISTORY table.
Answer: A,C,E
NEW QUESTION # 78
You issue the following command to drop the PRODUCTStable:
SQL > DROP TABLE products;
Which three statements are true about the implication of this command? (Choose three.)
- A. All data along with the table structure is deleted.
- B. All indexes on the table remain but they are invalidated.
- C. All views and synonyms on the table remain but they are invalidated.
- D. A pending transaction in the session is committed.
- E. All data in the table is deleted but the table structure remains.
Answer: A,C,D
Explanation:
Explanation
NEW QUESTION # 79
You and your colleague Andrew have these privileges on the EMPLOYEE_RECORDS table:
1. SELECT
2. INSERT
3. UPDATE
4. DELETE
You connect to the database instance an perform an update to some of the rows in EMPLOYEE_RECORDS, but don't commit yet.
Andrew connects to the database instance and queries the table
No othet user are accessing the table
Which two statements ate true at this point?
- A. Andrew will be able to SELECT from the table, but be unable to modify any existing rows.
- B. Andrew will be able to see the changes you habe made
- C. Andrew will be unable to perform any INSERT, UPDATE of DELETE on the teble
- D. Andrew will be able to modify any rows in the table that have not been modified by your transaction
- E. Andrew will be unable to see the changes you have made
Answer: D,E
Explanation:
In Oracle Database, when a transaction is not committed, the changes it makes are not visible to other sessions. This is due to Oracle's read consistency model, which means that Andrew will not be able to see the changes you have made until they are committed.
Option A is correct because, in Oracle, another session can modify rows that have not been locked by an uncommitted transaction.
Option C is incorrect because, as per Oracle's read consistency, the changes made by an uncommitted transaction are not visible to other users.
Option D is incorrect because Andrew can perform INSERT, UPDATE, or DELETE operations on the rows that you have not modified.
Option E is incorrect because, while Andrew will be able to SELECT from the table, he will still be able to modify rows that are not locked by your uncommitted update.
Reference:
Oracle Documentation on Transactions: Transactions
Oracle Documentation on Read Consistency: Read Consistency
NEW QUESTION # 80
View the Exhibit and examine the structure of the EMPLOYEES and JOB_HISTORY tables.
Examine this query which must select the employee IDs of all the employees who have held the job SA_MAN at any time during their employment.
SELECT employee_id
FROM employees
WHERE job_id = 'SA_MAN'
-------------------------------------
SELECT employee_id
FROM job_history
WHERE job_id='SA_MAN';
Choose two correct SET operators which would cause the query to return the desired result. (Choose two.)
- A. INTERSECT
- B. UNION ALL
- C. MINUS
- D. UNION
Answer: B,D
NEW QUESTION # 81
Examine this business rule:
Each student can work on multiple projects and earth project can have multiple students.
You must decide an Entity Relationship (ER) model for optional data storage and allow generating reports in this format:
STUDENT_ID FIRST_NAME LAST_NAME PROJECT_ID PROJECT_NAME PROJECT_TASK Which two statements are true?
- A. PROJECT_ID must be the primary key in the PROJECTS entity and foreign key in the STUDENTS entity.
- B. STUDENT_ID must be the primary key in the STUDENTS entity and foreign key in the PROJECTS entity.
- C. The ER must have a 1-to-many relationship between the STUDENTS and PROJECTS entities.
- D. An associative table must be created with a composite key of STUDENT_ID and PROJECT_ID, which is the foreign key linked to the STUDENTS and PROJECTS entities.
- E. The ER must have a many-to-many relationship between the STUDENTS and PROJECTS entities that must be resolved into 1-to-many relationships.
Answer: D,E
NEW QUESTION # 82
Examine the data in the INVOICES table:
Examine the data in the CURRENCIES table:
CURRENCY_CODE
-------------
JPY
GPB
CAD
EUR
USD
Which query returns the currencies in CURRENCIES that are not present in INVOICES?
- A. SELECT currency_ code FROM currencies
MINUS
SELECT currency_ code FROM invoices; - B. SELECT currency_ code FROM currencies
INTERSECT
SELECT currency_ code FROM invoices; - C. SELECT * FROM currencies
WHERE NOT EXISTS (
SELECT NULL FROM invoices WHERE currency_ code = currency_ code); - D. SELECT * FROM currencies
MINUS
SELECT * FROM invoices;
Answer: A
Explanation:
To calculate the length of employment, you would compare the current date to the HIRE_DATE and calculate the difference in years.
A . This is the correct answer. The expression calculates the number of days between the current date (SYSDATE) and the HIRE_DATE, then divides by 365 to convert it to years, and checks if it is greater than 5.
B . SYSTIMESTAMP includes a time component including fractional seconds and time zone information, making this comparison incorrect.
C . There are typos in this option (CUARENT_DATE should be CURRENT_DATE and hire_data should be hire_date). Even with the correct function and column names, CURRENT_DATE returns the current date in the session time zone, not in years.
D . There are typos in this option (SYSNAYW should be SYSDATE). Additionally, dividing by 12 incorrectly assumes that a month is equivalent to a year.
E . This is a repetition of option D with the same issues.
F . There are typos in this option (CUNACV_DATE should be CURRENT_DATE and hire_data should be hire_date). Additionally, dividing by 12 incorrectly assumes that a month is equivalent to a year.
Reference:
Oracle Database SQL Language Reference, 12c Release 1 (12.1): "Date Functions"
NEW QUESTION # 83
Table EMPLOYEES contains columns including EMPLOYEE_ID, JOB_ID and SALARY.
Only the EMPLOYEES_ID column is indexed.
Rows exist for employees 100 and 200.
Examine this statement:
UPDATE employees
SET (job_id, salary) =
(SELECT job_id, salary
FROM employees
WHERE employee_id = 200)
WHERE employee id=100;
Which two statements are true?
- A. Employee 200 will have SALARY set to the same value as the SALARY of employee 100.
- B. Employees 100 and 200 will have the same SALARY as before the update command.
- C. Employees 100 and 200 will have the same JOB ID as before the update command.
- D. Employee 100 will have SALARY set to the same value as the SALARY of employee 200.
- E. Employee 100 will have JOB_ID set to the same value as the JOB_ID of employee 200.
- F. Employee 200 will have JOB_ID set to the same value as the JOB_ID of employee 100
Answer: D,E
Explanation:
The SQL UPDATE statement is used to modify existing records in a table. In the given statement, there is a subquery that selects the JOB_ID and SALARY of EMPLOYEE_ID 200 and sets these values to the corresponding columns of EMPLOYEE_ID 100.
B . Employee 100 will have SALARY set to the same value as the SALARY of employee 200: This is true because the subquery selects the SALARY of employee 200 and the outer update statement sets this SALARY to employee 100.
C . Employee 100 will have JOB_ID set to the same value as the JOB_ID of employee 200: Similarly, the JOB_ID for employee 100 is updated to match the JOB_ID of employee 200 because of the subquery.
Reference:
Oracle Database SQL Language Reference 12c, particularly the section on the UPDATE statement and subqueries.
NEW QUESTION # 84
Which is true about the & and && prefixes with substitution variables?
- A. An & prefix to an undefined substitution variable, which is referenced twice in the same query, will prompt for a value twice .
- B. An && prefix to an undefined substitution variable, which is referenced multiple times in multiple queries, will prompt for a value once per query.
- C. Both & and && can prefix a substitution variable name in queries and DML statements.
- D. & can prefix a substitution variable name only in queries. DML
- E. The && prefix will not prompt for a value even if the substitution variable is not previously defined in the session.
Answer: C
Explanation:
E). True. Both & and && can prefix substitution variables in queries as well as in DML statements. & is used for defining a substitution variable that prompts the user every time the variable is encountered. && is used for a persistent substitution variable that, once defined in the session, will not prompt the user again for a value if used subsequently.
NEW QUESTION # 85
Examine the structure of the PROGRAMS table:
Which two SQL statements would execute successfully?
- A. SELECT NVL (MONTHS_BETWEEN (start_date, end_date), 'Ongoing') FROM
programs; - B. SELECT NVL (TO_CHAR (MONTHS_BETWEEN (start-date, end_date)), 'Ongoing') FROM programs
- C. SELECT TO_DATE (NVL (SYSDATE-END_DATE, SYSDATE)) FROM programs;
- D. SELECT NVL (ADD_MONTHS (END_DATE,1) SYSDATE) FROM programs;
Answer: B,D
NEW QUESTION # 86
Examine the structure and data in the PRICE_LIST table:
You plan to give a discount of 25% on the product price and need to display the discount amount in the same format as the PROD_PRICE.
Which SQL statement would give the required result?
- A. SELECT TO_CHAR (TO_NUMBER(prod_price) * .25, '$99,999.00')FROM PRICE_LIST
- B. SELECT TO_CHAR (prod_price* .25, '$99,999.99')FROM PRICE_LIST
- C. SELECT TO_NUMBER (TO_NUMBER(prod_price, '$99,999.99') * . 25, '$99,999.00')FROM PRICE_LIST
- D. SELECT TO_CHAR (TO_NUMBER(prod_price, '$99,999.99') * . 25, '$99,999.00')FROM PRICE_LIST
Answer: D
NEW QUESTION # 87
Which two statements are true about substitution variables? (Choose two.)
- A. A substitution variable can be used only in a SELECTstatement
- B. A substitution variable prefixed with & always prompts only once for a value in a session
- C. A substitution variable prefixed with && prompts only once for a value in a session unless it is set to undefined in the session
- D. A substitution variable used to prompt for a column name must be enclosed in double quotation marks
- E. A substitution variable can be used with any clause in a SELECTstatement
- F. A substitution variable used to prompt for a column name must be enclosed in a single quotation marks
Answer: C,F
NEW QUESTION # 88
Examine this description of the PRODUCTS table:
Rows exist in this table with data in all the columns. You put the PRODUCTS table in read-only mode.
Which three commands execute successfully on PRODUCTS?
- A. ALTER TABLE products DROP COLUMN expiry_date;
- B. ALTER TABLE products SET UNUSED (expiry_date);
- C. CREATE INDEX price_idx ON products (price);
- D. ALTER TABLE products DROP UNUSED COLUMNS;
- E. DROP TABLE products;
- F. TRUNCATE TABLE products;
Answer: C,D,E
NEW QUESTION # 89
Evaluate this ALTER TABLE statement: (Choose the best answer.)
ALTER TABLE orders
SET UNUSED (order_date);
Which statement is true?
- A. The ORDER_DATE column must be empty for the ALTER TABLE command to execute successfully.
- B. After executing the ALTER TABLE command, a new column called ORDER_DATE can be added to the ORDERS table.
- C. ROLLBACK can be used to restore the ORDER_DATE column.
- D. The DESCRIBE command would still display the ORDER_DATE column.
Answer: B
NEW QUESTION # 90
View the Exhibit and examine the details of PRODUCT_INFORMATION table.
You have the requirement to display PRODUCT_NAME from the table where the CATEGORY_ID column has values 12 or 13, and the SUPPLIER_ID column has the value 102088. You executed the following SQL statement:
SELECT product_name
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 condition is not enclosed within the parentheses.
- B. It would not execute because the same column has been used in both sides of the AND logical operator to form the condition.
- C. It would execute and the output would display the desired result.
- D. It would execute but the output would return no rows.
Answer: D
NEW QUESTION # 91
The user SCOTT who is the owner of ORDERS and ORDER_ITEMS tables issues this GRANT command:
GRANT ALL
ON orders, order_items
TO PUBLIC;
What must be done to fix the statement?
- A. WITH GRANT OPTION should be added to the statement.
- B. ALL should be replaced with a list of specific privileges.
- C. PUBLIC should be replaced with specific usernames.
- D. Separate GRANT statements are required for the ORDERS and ORDER_ITEMS tables.
Answer: D
Explanation:
http://docs.oracle.com/javadb/10.8.3.0/ref/rrefsqljgrant.html
NEW QUESTION # 92
Which three statements are true about performing Data Manipulation Language (DML) operations on a view in an Oracle Database? (Choose three.)
- A. Views cannot be used to add or modify rows in an underlying table if the defining query of the view contains aggregating functions.
- B. The WITH CHECKclause has no effect when deleting rows from the underlying table through the view.
- C. Views cannot be used to add or modify rows in an underlying table if the defining query of the view contains the DISTINCTkeyword.
- D. Insert statements can always be done on a table through a view.
- E. Views cannot be used to add rows to an underlying table if the table has columns with NOT NULL constraints lacking default values which are not referenced in the defining query of the view.
- F. Views cannot be used to query rows from an underlying table if the table has a PRIMARY KEYand the PRIMARY KEYcolumns are not referenced in the defining query of the view.
Answer: A,C,E
NEW QUESTION # 93
Which two are true about transactions in the Oracle Database?
- A. An uncommitted transaction is automatically committed when the user exits SQL*Plus.
- B. A session can see uncommitted updates made by the same user in a different session.
- C. A DDL statement issued by a session with an uncommitted transaction automatically Commits that transaction.
- D. DML statements always start new transactions.
- E. DDL statements automatically commit only data dictionary updates caused by executing the DDL.
Answer: A,C
Explanation:
This question appears to be a duplicate of question no. 269, and the correct answers provided there apply here as well.
B . True. A DDL statement automatically commits any outstanding uncommitted transaction in the session. E. True. Exiting SQL*Plus without explicitly committing a transaction will cause the uncommitted transaction to be rolled back, not committed.
A, C, and D are incorrect for the same reasons provided in the explanation for question no. 269.
NEW QUESTION # 94
......
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