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Preparations of 1z1-071 Exam 2021 Oracle PL/SQL Developer Certified Associate Unlimited 305 Questions
Prerequisites
There are no official requirements for passing the Oracle 1Z0-071 exam. However, it is recommended that the students have a good grasp of SQL syntax rules. They also need to be able to use general SQL functions, identify the result of fundamental DDL operations, and know how to implement SQL statements and functions.
Oracle 1z0-071 Practice Test Questions, Oracle 1z0-071 Exam Practice Test Questions
The Oracle 1Z0-071 exam is required for obtaining several certifications provided by the Oracle University, namely Oracle PL/SQL Developer Certified Associate, Oracle Database 12c Administrator Certified Associate, and Oracle Database SQL Certified Associate. This test validates the candidates’ competency in Oracle SQL as well as PL/SQL technologies.
Topics of Oracle 1Z0-071: Oracle Database SQL Exam
The Oracle 1Z0-071 dumps tests the abilities and knowledge of the candidates by checking the following objectives:
Relational Database concepts
- Explaining the theoretical and physical aspects of a relational database
- Explaining the relationship between a database and SQL
- Relating clauses in SQL Select Statement to Components of an ERD
Retrieving Data using the SQL SELECT Statement
- Using Column aliases
- Using concatenation operator, literal character strings, alternative quote operator, and the DISTINCT keyword
- Using Arithmetic expressions and NULL values in the SELECT statement
- Using The SQL SELECT statement
Restricting and Sorting Data
- Using the DEFINE and VERIFY commands
- Limiting Rows Returned in a SQL Statement
- Using Substitution Variables
- Sorting Data
- Applying Rules of precedence for operators in an expression
Using Single-Row Functions to Customize Output
- Manipulating strings with character functions in SQL SELECT and WHERE clauses
- Manipulating numbers with the ROUND, TRUNC and MOD functions
- Performing arithmetic with date data
- Manipulating dates with the date function
Using Conversion Functions and Conditional Expressions
- Understanding implicit and explicit data type conversion
- Applying the NVL, NULLIF, and COALESCE functions to data
- Using the TO_CHAR, TO_NUMBER, and TO_DATE conversion functions
- Nesting multiple functions
Reporting Aggregated Data Using Group Functions
- Restricting Group Results
- Using Group Functions
- Creating Groups of Data
Displaying Data from Multiple Tables
- Use of non-equijoins
- Using Self-joins
- Using OUTER joins
- Understanding and Using Cartesian Products
- Using Various Types of Joins
Using Subqueries to Solve Queries
- Update and delete rows using correlated subqueries
- Using Single Row Subqueries
- Using Multiple Row Subqueries
Using SET Operators
- Using The INTERSECT operator
- Using the ORDER BY clause in set operations
- Using The UNION and UNION ALL operators
- Using The MINUS operator
- Matching the SELECT statements
Managing Tables using DML statements
- Performing multi table Inserts
- Managing Database Transactions
- Controlling transactions
- Performing Merge statements
- Perform Insert, Update and Delete operations
Managing Indexes Synonyms and Sequences
- Managing Indexes
- Managing Sequences
- Managing Synonyms
Use DDL to manage tables and their relationships
- Describing and Working with Tables
- Managing Constraints
- Creating tables
- Truncating tables
- Describing and Working with Columns and Data Types
- Creating and using Temporary Tables
- Dropping columns and setting columns UNUSED
- Creating and using external tables
Managing Views
- Granting privileges on tables
- Controlling User Access
- Differentiating system privileges from object privileges
- Managing Views
- Distinguishing between granting privileges and roles
Managing Objects with Data Dictionary Views
- Using data dictionary views
- Managing Data in Different Time Zones
- Working with CURRENT_DATE, CURRENT_TIMESTAMP,and LOCALTIMESTAMP
- Working with INTERVAL data types
NEW QUESTION 65
View the Exhibit and examine the data in the PRODUCTS table.
You must display product names from the PRODUCTS table that belong to the 'Software/other' category with minimum prices as either $2000 or $4000 and with no unit of measure.
You issue this query:
Which statement is true?
- A. It generates an error because the condition specified for the PROD_CATEGORY column is not valid.
- B. It generates an error because the condition specified for PROD_UNIT_OF_MEASURE is not valid.
- C. It executes successfully but returns no result.
- D. It executes successfully and returns the required result.
Answer: C
NEW QUESTION 66
Examine the structure proposed for the TRANSACTIONS table:
Which two statements are true regarding the storage of data in the above table structure? (Choose two.)
- A. The TRANS_DATE column would allow storage of dates only in the dd-mon-yyyy format.
- B. The CUST_STATUS column would allow storage of data up to the maximum VARCHAR2 size of 4,000 characters.
- C. The TRANS_VALIDITY column would allow storage of a time interval in days, hours, minutes, and seconds.
- D. The CUST_CREDIT_VALUE column would allow storage of positive and negative integers.
Answer: C,D
NEW QUESTION 67
Which statements are correct regarding indexes? (Choose all that apply.)
- A. Indexes should be created on columns that are frequently referenced as part of any expression.
- B. When a table is dropped, the corresponding indexes are automatically dropped.
- C. A non-deferrable PRIMARY KEYor UNIQUE KEYconstraint in a table automatically creates a unique index.
- D. For each DML operation performed, the corresponding indexes are automatically updated.
Answer: B,C,D
Explanation:
Explanation/Reference:
References:
http://viralpatel.net/blogs/understanding-primary-keypk-constraint-in-oracle/
NEW QUESTION 68
View the Exhibit and examine the structure of the CUSTOMERS table.
Using the CUSTOMERS table, you must generate a report that displays a credit limit increase of 15% for all customers.
Customers with no credit limit should have "Not Available" displayed.
Which SQL statement would produce the required result?
- A. SELECT NVL(cust_credit_limit, 'Not Available')*.15 "NEW CREDIT" FROM customers;
- B. SELECT NVL(TO_CHAR(cust_credit_limit*.15), 'Not Available') "NEW CREDIT" FROM customers;
- C. SELECT TO_CHAR(NVL(cust_credit_limit*.15, 'Not Available')) "NEW CREDIT" FROM customers;
- D. SELECT NVL(cust_credit_limit*.15, 'Not Available') "NEW CREDIT" FROM customers;
Answer: D
NEW QUESTION 69
In which three situations does a transaction complete?
- A. when a TRUNCATE statement is executed after the pending transaction
- B. when a PL/SQL anonymous block is executed
- C. when a data definition language (DDL) statement is executed
- D. when a DELETE statement is executed
- E. when a ROLLBACK command is executed
Answer: A,C,E
Explanation:
References:
https://docs.oracle.com/cd/B19306_01/server.102/b14220/transact.htm
NEW QUESTION 70
View the Exhibit and examine the details of the ORDER_ITEMS table.
Evaluate the following SQL statements:
Statement 1:
SELECT MAX(unit_price*quantity) "Maximum Order"
FROM order_items;
Statement 2:
SELECT MAX(unit_price*quantity) "Maximum Order"
FROM order_items
GROUP BY order_id;
Which statements are true regarding the output of these SQL statements? (Choose all that apply.)
- A. Statement 1 would return only one row of output.
- B. Both statements would ignore NULL values for the UNIT_PRICE and QUANTITY columns.
- C. Statement 1 would not return give the same output.
- D. Statement 2 would return multiple rows of output.
- E. Both the statements would give the same output.
Answer: A,B,D
NEW QUESTION 71
Examine this SELECT statement and view the Exhibit to see its output: (Choose two.)
SELECT constraints_name, constraints_type, search_condition, r_constraints_name, delete_rule, status, FROM user_constraints WHERE table_name = 'ORDERS'; Which two statements are true about the output?
- A. The DELETE_RULE column indicates the desired state of related rows in the child table when the corresponding row is deleted from the parent table.
- B. The STATUS column indicates whether the table is currently in use.
- C. In the second column, 'c' indicates a check constraint.
- D. The R_CONSTRAINT_NAME column contains an alternative name for the constraint.
Answer: A,C
NEW QUESTION 72
Which two statements are true about sequences crated in a single instance Oracle database?
- A. When the database instance shuts down abnormally, sequence numbers that have been cached but not used are available again when the instance is restarted.
- B. The numbers generated by an explicitly defined sequence can only be used to insert data in one table.
- C. When the MAXVALUE limit for a sequence is reached, it can be increased by using the ALTER SEQUENCE statement.
- D. DELETE <sequencename> would remove a sequence from the database.
- E. CURRVAL is used to refer to the most recent sequence number that has been generated for a particular sequence.
Answer: C,E
NEW QUESTION 73
View the exhibit and examine the data in ORDERS_MASTER and MONTHLY_ORDERS tables.
Evaluate the following MERGE statement:
MERGE_INTO orders_master o
USING monthly_orders m
ON (o.order_id = m.order_id)
WHEN MATCHED THEN
UPDATE SET o.order_total = m.order_total
DELETE WHERE (m.order_total IS NULL)
WHEN NOT MATCHED THEN
INSERT VALUES (m.order_id, m.order_total);
What would be the outcome of the above statement?
- A. The ORDERS_MASTER table would contain the ORDER_IDs 1, 2, 3 and 4.
- B. The ORDERS_MASTER table would contain the ORDER_IDs 1 and 2.
- C. The ORDERS_MASTER table would contain the ORDER_IDs 1, 2 and 4.
- D. The ORDERS_MASTER table would contain the ORDER_IDs 1, 2 and 3.
Answer: C
Explanation:
https://docs.oracle.com/cd/B28359_01/server.111/b28286/statements_9016.htm
NEW QUESTION 74
Which three statements are true about Oracle synonyms?
- A. A synonym created by one user can refer to an object belonging to another user.
- B. A synonym cannot be created for a PL /SQL package.
- C. Any user can drop a PUBLIC synonym.
- D. A SEQUENCE can have a synonym.
- E. A synonym can be available to all users .
Answer: A,B,E
NEW QUESTION 75
View the Exhibit and examine the structure in the DEPARTMENTS tables. (Choose two.)
Examine this SQL statement:
SELECT department_id "DEPT_ID", department_name, 'b' FROM
departments
WHERE departments_id=90
UNION
SELECT department_id, department_name DEPT_NAME, 'a' FROM
departments
WHERE department_id=10
Which two ORDER BY clauses can be used to sort the output?
- A. ORDER BY DEPT_ID;
- B. ORDER BY 'b';
- C. ORDER BY DEPT_NAME;
- D. ORDER BY 3;
Answer: A,D
NEW QUESTION 76
The customers table has the following structure:
You need to write a query that does the following tasks:
1. Display the first name and tax amount of the customers. Tax is 5% of their credit limit.
2. Only those customers whose income level has a value should be considered.
3. Customers whose tax amount is null should not be considered.
Which statement accomplishes all the required tasks?
- A. SELECT cust_first_name, cust_credit_limit * .05 AS TAX_AMOUNTFROM customersWHERE cust_income_level IS NOT NULL ANDtax_amount IS NOT NULL;
- B. SELECT cust_first_name, cust_credit_limit * .05 AS TAX_AMOUNTFROM customersWHERE cust_income_level <> NULL ANDtax_amount <> NULL;
- C. SELECT cust_first_name, cust_credit_limit * .05 AS TAX_AMOUNTFROM customersWHERE cust_income_level IS NOT NULL ANDcust_credit_limit IS NOT NULL;
- D. SELECT cust_first_name, cust_credit_limit * .05 AS TAX_AMOUNTFROM customersWHERE (cust_income_level, tax_amount) IS NOT NULL;
Answer: C
NEW QUESTION 77
You execute this command:
TRUNCATE TABIE depts;
Which two are true?
- A. It retains the integrity constraints defined on the table,
- B. It drops any triggers defined on the table.
- C. A FLASHBACK TABLE statement can be used to retrieve the deleted data.
- D. It retains the indexes defined on the table.
- E. It always retains the space used by the removed rows.
- F. A ROLLBACK statement can be used to retrieve the deleted data.
Answer: A,D
NEW QUESTION 78
Examine the types and examples of relationship that follow:
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-c, 2-a, 3-b, and 4-d
- B. 1-a, 2-b, 3-c, and 4-d
- C. 1-c, 2-d, 3-a, and 4-b
- D. 1-d, 2-b, 3-a, and 4-c
Answer: B
NEW QUESTION 79
View the Exhibit and examine the description of the EMPLOYEES table.
You want to calculate the total remuneration for each employee. Total remuneration is the sum of the annual salary and the percentage commission earned for a year. Only a few employees earn commission.
Which SQL statement would you execute to get the desired output?
- A. SELECT first_name, salary, salary*12+(salary*NVL2 (commission_pct,
salary,salary+commission_pct))"Total"FROM EMPLOYEES; - B. SELECT first_name, salary, salary*12+salary*commission_pct "Total"FROM EMPLOYEES;
- C. SELECT first_name, salary (salary + NVL (commission_pct, 0)*salary)*12 "Total"FROM EMPLOYEES;
- D. SELECT first_name, salary, salary*12 + NVL(salary,0)*commission_pct, "Total"FROM EMPLOYEES;
Answer: A
NEW QUESTION 80
View the Exhibit and examine the structure of the CUSTOMERS table.
Evaluate the following SQL statement:
Which statement is true regarding the outcome of the above query?
- A. It returns an error because WHERE and HAVING clauses cannot be used to apply conditions on the same column.
- B. It returns an error because the BETWEEN operator cannot be used in the HAVING clause.
- C. It returns an error because WHERE and HAVING clauses cannot be used in the same SELECT statement.
- D. It executes successfully.
Answer: D
NEW QUESTION 81
View the exhibits and examine the structures of the COSTS and PROMOTIONS tables.
Evaluate the following SQL statement:
What would be the outcome of the above SQL statement?
- A. It displays prod IDs in the promos with the lowest cost in the same time interval.
- B. It displays prod IDs in the promos which cost less than the highest cost in the same time interval.
- C. It displays prod IDs in the promos with the highest cost in the same time interval.
- D. It displays prod IDs in the promo with the lowest cost.
Answer: B
NEW QUESTION 82
Which three actions can you perform on an existing table containing data? (Choose three.)
- A. Increase the width of a numeric column
- B. Change a DATEcolumn containing data to a NUMBERdata type
- C. Define a default value that is automatically inserted into a column containing nulls
- D. Change the default value of a column
- E. Add a new column as the table's first column
- F. Add a new NOT NULL column with a DEFAULTvalue
Answer: A,D,F
Explanation:
Explanation/Reference: https://docs.oracle.com/javadb/10.8.3.0/ref/rrefsqlj24513.html
NEW QUESTION 83
Evaluate this ALTER TABLE statement: (Choose the best answer.)
ALTER TABLE orders
SET UNUSED (order_date);
Which statement is true?
- A. The DESCRIBE command would still display the ORDER_DATE column.
- B. The ORDER_DATE column must be empty for the ALTER TABLE command to execute successfully.
- C. After executing the ALTER TABLE command, a new column called ORDER_DATE can be added to the ORDERS table.
- D. ROLLBACK can be used to restore the ORDER_DATE column.
Answer: C
NEW QUESTION 84
Examine the structure of the PROGRAMS table:
Which two SQL statements would execute successfully?
- A. SELECT NVL (TO_CHAR (MONTHS_BETWEEN (start-date, end_date)), 'Ongoing') FROM programs
- B. SELECT TO_DATE (NVL (SYSDATE-END_DATE, SYSDATE)) FROM programs;
- C. SELECT NVL (ADD_MONTHS (END_DATE,1) SYSDATE) FROM programs;
- D. SELECT NVL (MONTHS_BETWEEN (start_date, end_date), 'Ongoing') FROM programs;
Answer: A,C
NEW QUESTION 85
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