Best Oracle 1z0-071 Exam Practice Material Updated on Jul 31, 2024
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Oracle 1z0-071 or Oracle Database SQL Exam is a certification exam that tests an individual's skills and knowledge in SQL programming language and its applications in the Oracle database. 1z0-071 exam is designed for individuals who want to pursue a career as a database developer, database administrator, or a data analyst. Passing the exam provides candidates with a valuable credential that verifies their proficiency in SQL and databases, which can help them stand out in a highly competitive job market.
NEW QUESTION # 29
Examine this query:
SELECT TRUNC (ROUND(156.00,-2),-1) FROM DUAL; What is the result?
- A. 0
- B. 1
- C. 2
- D. 3
- E. 4
Answer: B
Explanation:
The query uses two functions: ROUND and TRUNC. The ROUND function will round the number 156.00 to the nearest hundred because of the -2 which specifies the number of decimal places to round to. This will result in 200. Then the TRUNC function truncates this number to the nearest 10, due to the -1 argument, which will give us 200 as the result since truncation does not change the rounded value in this case.
* A. 16 (Incorrect)
* B. 160 (Incorrect)
* C. 150 (Incorrect)
* D. 200 (Incorrect)
* E. 100 (Incorrect)
NEW QUESTION # 30
View the exhibit and examine the description of the PRODUCT_INFORMATION table.
Which SQL statement would retrieve from the table the number of products having LIST_PRICE as NULL?
- A. SELECT COUNT (DISTINCT list_price)FROM product_informationWHERE list_price is NULL
- B. SELECT COUNT (list_price)FROM product_informationWHERE list_price is NULL
- C. SELECT COUNT (NVL(list_price, 0))FROM product_informationWHERE list_price is NULL
- D. SELECT COUNT (list_price)FROM product_informationWHERE list_price i= NULL
Answer: C
NEW QUESTION # 31
Examine the description of the EMPLOYEES table:
NLS_DATE_FORMAT is set to DD-MON-YY.
Which query requires explicit data type conversion?
- A. SELECT salary + 120.50 FROM employees;
- B. SELECT join date 11.'11 salary FROM employees;
- C. SELECT join date FROM employees where join date > *10-02-2018*;
- D. SELECT join date + 20 FROM employees;
- E. SELECT SUBSTR(join date, 1, 2)- 10 FROM employees;
Answer: C
NEW QUESTION # 32
Examine the structure of the MARKStable:
Which two statements would execute successfully? (Choose two.)
SELECT SUM(DISTINCT NVL(subject1,0)), MAX(subject1)
- A. FROM marks
WHERE subject1 > subject2;
SELECT student_name subject1 - B. FROM marks
WHERE student_name IS NULL;
SELECT student_name,SUM(subject1) - C. FROM marks
WHERE subject1 > AVG(subject1);
SELECT SUM(subject1+subject2+subject3) - D. FROM marks
WHERE student_name LIKE 'R%';
Answer: A,B
NEW QUESTION # 33
View the Exhibit and examine the structure of the ORDERS table.
The columns ORDER_MODE and ORDER TOTAL have the default values'direct "and respectively.
Which two INSERT statements are valid? (Choose two.)
- A. INSERT INTO orders (order id, order_date, order mode, order_total)VALUES (1,'10-mar-2007','online', 1000)
- B. INSERT INTO orders (order_id, order_date, order mode,customer_id, order_total) VALUES (1, TO_DATE (NULL),'online',101, NULL) ;
- C. INSERT INTO orders VALUES (1, '09-mar-2007', 'online',' ',1000);
- D. INSERT INTO orders VALUES('09-mar-2007',DEFAULT,101, DEFALLT);
- E. INSERT INTO (SELECT order_id, order date, customer_id FROM orders) VALUES (1, '09-mar-2007",101);
Answer: D,E
NEW QUESTION # 34
Examine the description of the PRODUCT_ DETAILS table:
Which two statements are true?
- A. PRODUCT_ PRICE contains the value zero by default if no value is assigned to it.
- B. EXPIRY_ DATE cannot be used in arithmetic expressions.
- C. PRODUCT_ PRICE can be used in an arithmetic expression even if it has no value stored in it.
- D. EXPIRY_ DATE contains the SYSDATE by default if no date is assigned to it.
- E. PRODUCT_ ID can be assigned the PRIMARY KEY constraint.
- F. PRODUCT_ NAME cannot contain duplicate values.
Answer: C,E
NEW QUESTION # 35
Examine this partial command:
CREATE TABLE cust(
cust_id NUMBER(2),
credit_limit NUMBER(10)
ORGANIZATION EXTERNAL
Which two clauses are required for this command to execute successfully?
- A. the DEFAULT DIRECTORY clause
- B. the LOCATION clause
- C. the REJECT LIMIT clause
- D. the ACCESS PARAMETERS clause
- E. the access driver TYPE clause
Answer: B,D
Explanation:
When creating an external table, which allows you to access data in a flat file as though it is a table inside the database, certain clauses are required:
* A. the ACCESS PARAMETERS clause: This clause specifies the parameters required by the access driver to read the data files.
* D. the LOCATION clause: This clause specifies the location of the data files that make up the external table.
References:
* Oracle Database SQL Language Reference 12c, particularly the sections detailing the creation and management of external tables.
NEW QUESTION # 36
Which two statements are true about sequences created in a single instance database?
(Choose two.)
- A. When a database instance shuts down abnormally, the sequence numbers that have been cached but not used would be available once again when the database instance is restarted.
- B. The numbers generated by a sequence can be used only for one table.
- C. DELETE <sequencename> would remove a sequence from the database.
- D. When the MAXVALUE limit for the sequence is reached, you can increase the MAXVALUE limit by using the ALTER SEQUENCE statement.
- E. CURRVAL is used to refer to the last sequence number that has been generated.
Answer: D,E
Explanation:
References:
http://docs.oracle.com/cd/E11882_01/server.112/e41084/statements_2012.htm#SQLRF00
817
https://docs.oracle.com/cd/A84870_01/doc/server.816/a76989/ch26.htm
NEW QUESTION # 37
Which two statements are true? (Choose two.)
- A. The USER_OBJECTS view can provide information about the tables and views created by the user who queries the view.
- B. All the dynamic performance views prefixed with v$ are accessible to all the database users.
- C. The USER_SYNONYMS view can provide information about private synonyms.
- D. DICTIONARY is a view that contains the names of all the data dictionary views that the user can access.
- E. The user SYSTEM owns all the base tables and user-accessible views of the data dictionary.
Answer: A,C
NEW QUESTION # 38
Examine the description of the EMPLOYEES table
You write this failing statement:
SELECT dept_no AS department_id, MAX (salary) As max_sal
FROM employees
WHERE salary >10000
GROUP BY department_id
ORDER BY max_sal;
Which clause causes the error?
- A. SELECT
- B. GROUP BY
- C. WHERE
- D. ORDER BY
Answer: B
Explanation:
In the SQL statement provided, the error is caused by the GROUP BY clause. In Oracle SQL, when using GROUP BY, the expression in the GROUP BY clause must match exactly the expression in the SELECT list. The GROUP BY clause should reference the column name dept_no as mentioned in the SELECT list, not the alias department_id which is defined within the same SELECT statement.
The corrected SQL statement should be:
SELECT dept_no AS department_id, MAX(salary) As max_sal FROM employees WHERE salary > 10000 GROUP BY dept_no -- Changed from 'department_id' to 'dept_no' ORDER BY max_sal; References:
* Oracle Documentation on GROUP BY clause: GROUP BY Clause
NEW QUESTION # 39
Examine the structure of the SALES table.
Examine this statement:
Which two statements are true about the SALES1 table? (Choose two.)
- A. It will have NOT NULL constraints on the selected columns which had those constraints in the SALES table.
- B. It is created with no rows.
- C. It will not be created because the column-specified names in the SELECT and CREATE TABLE clauses do not match.
- D. It has PRIMARY KEY and UNIQUE constraints on the selected columns which had those constraints in the SALES table.
- E. It will not be created because of the invalid WHERE clause.
Answer: A,B
NEW QUESTION # 40
View the Exhibit and examine the structure of the PRODUCT_INFORMATION table.
PRODUCT_ID column is the primary key.
You create an index using this command:
SQL > CREATE INDEX upper_name_idx
ON product_information(UPPER(product_name));
No other indexes exist on the PRODUCT_INFORMATION table.
Which query would use the UPPER_NAME_IDX index? (Choose the best answer.)
- A. SELECT product_id, UPPER(product_name)FROM product_informationWHERE UPPER(product_name)='LASERPRO' OR list_price > 1000;
- B. SELECT product_idFROM product_informationWHERE UPPER(product_name) IN ('LASERPRO', 'CABLE');
- C. SELECT UPPER(product_name)FROM product_informationWHERE product_id = 2254;
- D. SELECT UPPER(product_name)FROM product_information;
Answer: B
NEW QUESTION # 41
.No user-defined locks are used in your database.
Which three are true about Transaction Control Language (TCL)?
- A. ROLLBACK to SAVEPOTNT undoes the transaction's changes made since the named savepoint and then ends the transaction.
- B. COMMIT erases all the transaction's savepoints and releases its locks.
- C. ROLLBACK without the TO SAVEPOINT clause undoes all the transaction's changes but does not release its locks.
- D. ROLLBACK without the TO SAVEPOINT clause undoes all the transaction's changes but does not erase its savepoints.
- E. ROLLBACK without the TO SAVEPOINT clause undoes alt the transaction's changes, releases its locks, and erases all its savepoints.
- F. COMMIT ends the transaction and makes all its changes permanent.
Answer: B,E,F
NEW QUESTION # 42
Which four statements are true regarding primary and foreign key constraints and the effect they can have on table data? (Choose four.)
- A. A table can have only one primary key but multiple foreign keys
- B. The foreign key columns and parent table primary key columns must have the same names
- C. Only the primary key can be defined at the column and table level
- D. Primary key and foreign key constraints can be defined at both the column and table level
- E. A table can have only one primary key and one foreign key
- F. It is possible for child rows that have a foreign key to be deleted automatically from the child table at the time the parent row is deleted
- G. It is possible for child rows that have a foreign key to remain in the child table at the time the parent row is deleted
Answer: A,B,D,F
NEW QUESTION # 43
In the EMPLOYEES table there are 1000 rows and employees are working in the company for more than 10 years.
Evaluate the following SQL statement:
What would be the result?
- A. It gives an error because multiple NVL functions are used in an expression.
- B. It executes successfully but no rows updated.
- C. It executes successfully and updates the records of those employees who have been working in the company for more than 600 days.
- D. It gives an error because NVL function cannot be used with UPDATE.
Answer: C
NEW QUESTION # 44
Which three are key components of an Entity Relationship Model? (Choose three.)
- A. an activity
- B. a table
- C. a relationship
- D. an attribute
- E. an entity
- F. a unique identifier
Answer: C,D,E
Explanation:
The three main components of the ER Model are entities, attributes and relationships.
Reference: https://www.dlsweb.rmit.edu.au/Toolbox/knowmang/content/data_concepts/e_r_model.htm
NEW QUESTION # 45
View the Exhibit and examine the structure of the ORDERS table.
The columns ORDER_MODE and ORDER TOTAL have the default values'direct "and respectively.
Which two INSERT statements are valid? (Choose two.)
- A. INSERT INTO orders (order id, order_date, order mode, order_total)VALUES (1'10-mar-2007','online', 1000)
- B. INSERT INTO (SELECT order_id, order date, customer_id FROM orders) VALUES (1,
'09-mar-2007"101); - C. INSERT INTO orders VALUES('09-mar-2007'DEFAULT,101, DEFALLT);
- D. INSERT INTO orders (order_id, order_date, order mode,customer_id, order_total) VALUES (1, TO_DATE (NULL),'online',101, NULL) ;
- E. INSERT INTO orders VALUES (1, '09-mar-2007', 'online',' ',1000);
Answer: B,C
NEW QUESTION # 46
Examine the business rule:
Each student can work on multiple projects and each project can have multiple students.
You need to design an Entity Relationship Model (ERD) for optimal data storage and allow for generating reports in this format:
STUDENT_ID FIRST_NAME LAST_NAME PROJECT_ID PROJECT_NAME
PROJECT_TASK
Which two statements are true in this scenario?
- A. STUDENT_ID must be the primary key in the STUDENTS entity and foreign key in the PROJECTS entity.
- B. The ERD must have a 1:M relationship between the STUDENTS and PROJECTS entities.
- C. The ERD must have a M:M relationship between the STUDENTS and PROJECTS entities that must be resolved into 1:M relationships.
- 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. PROJECT_ID must be the primary key in the PROJECTS entity and foreign key in the STUDENTS entity.
Answer: C,D
Explanation:
References:
http://www.oracle.com/technetwork/issue-archive/2011/11-nov/o61sql-512018.html
NEW QUESTION # 47
Which three statements are true about Data Manipulation Language (DML)?
- A. DML statements require a primary key be defined on a table.
- B. insert statements can insert nulls explicitly into a column.
- C. update statements can have different subqueries to specify the values for each updated column.
- D. insert into. . .select. . .from statements automatically commit.
- E. delete statements can remove multiple rows based on multiple conditions.
Answer: B,C,E
Explanation:
Data Manipulation Language (DML) operations in Oracle 12c are critical for handling data within tables.
Here's the validity of each statement based on Oracle SQL documentation:
* Option A: True. The DELETE statement can remove multiple rows from a table and supports the use of multiple conditions in the WHERE clause to specify which rows should be removed. This allows for flexibility in managing data deletion based on various criteria.
* Option B: True. The INSERT statement can explicitly insert NULL values into a column, assuming there are no constraints (like NOT NULL) preventing such entries. This is useful for representing the absence of data or when data is unknown.
* Option C: False. DML statements like INSERT INTO...SELECT...FROM do not automatically commit in Oracle. Transactions in Oracle require explicit COMMIT commands to finalize changes, unless in an autocommit mode set by a client tool or environment, which is generally not the default behavior for server-side operations.
* Option D: False. DML statements do not require a primary key to be defined on a table. While having a primary key is a best practice for identifying each row uniquely, it's not a prerequisite for performing DML operations like INSERT, UPDATE, or DELETE.
* Option E: True. The UPDATE statement can include different subqueries within the SET clause to determine the values for each column being updated. This allows for complex calculations and data retrieval to be part of an update, increasing the power and flexibility of data modification.
NEW QUESTION # 48
View the Exhibits and examine PRODUCTSand SALES tables.
Exhibit 1
Exhibit 2
You issue the following query to display product name the number of times the product has been sold:
What happens when the above statement is executed?
- A. The statement executes successfully and produces the required output.
- B. The statement produces an error because the GROUP BYclause cannot be used in a subquery in the FROMclause.
- C. The statement produces an error because ITEM_CNTcannot be displayed in the outer query.
- D. The statement produces an error because a subquery in the FROMclause and outer-joins cannot be used together.
Answer: A
NEW QUESTION # 49
Examine the description or the BOOKS_TRANSACTIONS table:
FOR customers whose income level has a value, you want to display the first name and due amount as 5% of their credit limit. Customers whose due amount is null should not be displayed.
Which query should be used?
- A. SELECT cust_first_name, cust_credit_limit * . 05 AS DUE AMOUNT
FROM customers
WHERE cust income_level <> NULL
AND due_amount <> NULL; - B. SELECT cust_first_name, cust_credit_limit * . 05 AS DUE AMOUNT
FROM customers
WHERE cust income_level !=NULL
AND due_amount !=NULL; - C. SELECT cust_first_name, cust_credit_limit * . 05 AS DUE AMOUNT
FROM customers
WHERE cust_income_level IS NOT NULL
AND cust_credit_limit IS NOT NULL; - D. SELECT cust_first_name, cust_credit_limit * . 05 AS DUE AMOUNT
FROM customers
WHERE cust income_level !=NULL
AND cust credit_level !=NULL; - E. SELECT cust_first_name, cust_credit_limit * . 05 AS DUE AMOUNT
FROM customers
WHERE cust income_level IS NOT NULL
AND due_amount IS NOT NULL;
Answer: C
NEW QUESTION # 50
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Oracle 1z0-071, also known as the Oracle Database SQL certification exam, is a widely recognized and respected certification for professionals working with databases. 1z0-071 exam tests the individual's knowledge and understanding of the SQL language and its use in managing and manipulating data within an Oracle database environment. Passing 1z0-071 exam is a valuable asset to professionals who work with Oracle databases, and it proves their expertise and proficiency in the SQL language.
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