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Oracle 1Z0-071 Exam Questions
- Topic 1: Relational Database concepts: In this domain, the topics covered include explaining the theoretical and physical aspects of a relational database and relating clauses in SQL Select Statement to Components of an ERD.
- Topic 2: Retrieving Data using the SQL SELECT Statement: This domain comprises topics such as using Column aliases, the SQL SELECT statement, utilizing the concatenation operator, literal character strings, alternative quote operator, and the DISTINCT keyword.
- Topic 3: Restricting and Sorting Data: This domain covers topics such as applying Rules of precedence for operators in an expression, limiting Rows Returned in a SQL Statement, and utilizing Substitution Variables.
- Topic 4: sing Single-Row Functions to Customize Output: This particular domain of the exam covers topics such as manipulating strings with character functions in SQL SELECT and WHERE clauses, performing arithmetic with date data, and manipulating numbers with the ROUND, TRUNC, and MOD functions. It also covers manipulating dates with the date function.
- Topic 5: Using Conversion Functions and Conditional Expressions: In this domain, the topics covered are how to apply the NVL, NULLIF, and COALESCE functions to data, how to understand the implicit and explicit data type conversion, utilize the TO_CHAR, TO_NUMBER, and TO_DATE conversion functions, and nesting multiple functions.
- Topic 6: Reporting Aggregated Data Using Group Functions: In this section of the exam, it is covered how to restrict Group Results and create Groups of Data.
- Topic 7: Displaying Data from Multiple Tables: In this domain, topics include how to use Self-joins, use different types of Joins, how to utilize Nonequijoins, and OUTER joins.
- Topic 8: Using Subqueries to Solve Queries: In this module, topics include using Single Row Subqueries, Multiple Row Subqueries, and how to delete and update rows.
- Topic 9: Using SET Operators: In this domain, the topics covered match the SELECT statements, utilizing the ORDER BY clause in set operations, the INTERSECT operator, and the MINUS operator.
- Topic 10: Managing Tables using DML statements: In this exam domain, topics covered include managing Database transactions, controlling them, perform Insert, Update, and Delete operations. It also covers how to perform multi-table Inserts and Merge statements.
- Topic 11: Managing Indexes Synonyms and Sequences: In this domain, topics include managing Indexes, managing Synonyms, and managing Sequences.
- Topic 12: Managing Indexes Synonyms and Sequences: In this domain, exam-takers are tested for their skill in managing Indexes, Synonyms, and Sequences.
- Topic 13: Managing Views: This domain covers how to manage or oversee modules.
- Topic 14: Controlling User Access: In this module, the topics include differentiating system privileges from object privileges Granting privileges on tables and distinguishing between giving privileges and roles.
- Topic 15: Managing Objects with Data Dictionary Views: This domain covers utilizing data dictionary views.
- Topic 16: Managing Data in Different Time Zones: In this domain, topics include working with CURRENT_DATE, CURRENT_TIMESTAMP, and LOCALTIMESTAMP, and working with INTERVAL data types.
Free Oracle 1Z0-071 Exam Actual Questions
Note: Premium Questions for 1Z0-071 were last updated On Apr. 07, 2025 (see below)
Which two queries execute successfully?
The NULLIF and COALESCE functions in Oracle SQL serve specific purposes:
Option A: Executes successfully. NULLIF returns NULL if the two arguments are equal; otherwise, it returns the first argument.
Option B: Also correct. COALESCE returns the first non-null value among its arguments.
Option C: This will not execute successfully because NULLIF requires both arguments to be of comparable data types. Comparing an integer to a character ('100' to 'A') is invalid.
Option D: Executes successfully. NULLIF returns NULL because it compares NULL to a number, which is valid (though always yields NULL).
Option E: Executes successfully. COALESCE accepts any data type as it returns the first non-null value, irrespective of type consistency among the arguments.
Examine the description of the CUSTOMERS table:
Which three statements will do an implicit conversion?
A: No implicit conversion; DATE is explicitly specified.
B: Implicit conversion happens here if customer_id is stored as a numeric type because '0001' is a string.
C: TO_DATE is explicitly used, so no implicit conversion occurs here.
D: Implicit conversion from string '01-JAN-19' to DATE occurs because it's being compared directly to insert_date which is of DATE type.
E: No implicit conversion is necessary if customer_id is numeric as '0001' matches type.
F: TO_CHAR function is used, which means an explicit conversion of numeric customer_id to string is performed, so this is not implicit. Hence, this is incorrect regarding implicit conversion.
Each answer has been verified with reference to the official Oracle Database 12c SQL documentation, ensuring accuracy and alignment with Oracle's specified functionalities.
Which statement fails to execute successfully?
A)
B)
C)
D)
In Oracle SQL, when performing a JOIN operation, the ON clause is used to specify the condition that relates the two tables being joined. The WHERE clause can be used to further filter the result set.
A) This is a valid join condition using the WHERE clause to filter the rows after the join has been made.
B) This statement will fail because the ON clause should only contain conditions that relate the two tables. The condition for filtering the departments table should be in the WHERE clause, not in the ON clause. This is a common mistake when writing JOIN statements.
C) This is a correct statement. The ON clause specifies how the tables are related and the WHERE clause specifies an additional filtering condition for the query.
D) This statement is also correct. It's similar to the first statement (A) and properly places the department_id filter in the ON clause, which is acceptable though not typically best practice as it can be less readable than using a WHERE clause for non-join conditions.
When the JOIN operation is executed, the database first pairs rows from the joined tables that meet the join condition specified by the ON clause. Then, it filters the result of the JOIN operation based on the condition specified in the WHERE clause.
Oracle Documentation on Joins: https://docs.oracle.com/database/121/SQLRF/queries006.htm#SQLRF52359
Examine the description of the ORDER_ITEMS table:
Examine this incomplete query:
SELECT DISTINCT quantity * unit_price total_paid FROM order_items ORDER BY
Which two can replace
In a SELECT statement with DISTINCT, the ORDER BY clause can only order by expressions that are part of the SELECT list.
A . quantity alone is not sufficient to replace <clause> as it is not included in the SELECT list after DISTINCT.
B . This option can successfully replace <clause> because both quantity and unit_price are used in the SELECT expression, and thus their individual values are valid for the ORDER BY clause.
C . total_paid is an alias for the expression quantity * unit_price, but it cannot be used in the ORDER BY clause because Oracle does not allow aliases of expressions in DISTINCT queries to be used in ORDER BY.
D . product_id is not included in the SELECT list after DISTINCT and thus cannot be used in ORDER BY.
E . The expression quantity * unit_price is exactly what is selected, so it can replace <clause> and the query will complete successfully.
Oracle Database SQL Language Reference, 12c Release 1 (12.1): 'ORDER BY Clause'
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