1z1-071 Test Lab Questions, 1z1-071 Dumps Download

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Oracle 1z1-071 Exam Syllabus Topics:

Section	Weight	Objectives
Topic 1: Conversion Functions and Conditional Expressions	10%	- TO_CHAR, TO_NUMBER, TO_DATE functions - NVL, NULLIF, COALESCE and CASE expressions - Implicit and explicit data type conversion
Topic 2: Relational Database Concepts	10%	- Relationship between database and SQL - Theoretical and physical aspects of relational databases - ERD and SQL statement mapping
Topic 3: Restricting and Sorting Data	15%	- ORDER BY clause and sorting rules - WHERE clause and filtering conditions - Operator precedence - Substitution variables, DEFINE and VERIFY commands
Topic 4: Managing Views		- Updatable and read-only views - Create, modify and drop views
Topic 5: Working with Time Zones and Date/Time Data		- Time zone conversion functions - TIMESTAMP, INTERVAL data types
Topic 6: Managing Indexes, Synonyms and Sequences		- Create and use synonyms - Create and use sequences - Create and maintain indexes
Topic 7: Retrieving Data Using SQL SELECT Statement	20%	- SELECT statement syntax and usage - Column aliases, concatenation, literals and DISTINCT - Arithmetic operations and NULL handling
Topic 8: Using Single-Row Functions to Customize Output	20%	- Nested functions usage - Character, number, and date functions
Topic 9: Managing Tables and Constraints		- Temporary and external tables - Constraints: primary key, foreign key, unique, check, not null - Data types, creating/altering/dropping tables
Topic 10: Controlling User Access		- System and object privileges - Roles, granting and revoking privileges
Topic 11: Using SET Operators		- Ordering results with set operations - UNION, UNION ALL, INTERSECT, MINUS operators
Topic 12: Manipulating Data and Managing Transactions		- INSERT, UPDATE, DELETE, MERGE statements - Multi-table inserts - Transaction control: COMMIT, ROLLBACK, SAVEPOINT
Topic 13: Using Data Dictionary Views		- Retrieve metadata and object information
Topic 14: Aggregating Data Using Group Functions	10%	- SUM, AVG, COUNT, MAX, MIN functions - GROUP BY and HAVING clauses - Handling NULLs in group functions
Topic 15: Using Subqueries to Solve Queries		- Single-row and multi-row subqueries - Correlated subqueries for update/delete
Topic 16: Displaying Data from Multiple Tables	15%	- Equijoins and non-equijoins - Self-joins and outer joins - Cartesian products

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Oracle Database SQL Sample Questions (Q23-Q28):

NEW QUESTION # 23
Examine the description of the PRODUCT_DETAILStable:

Which two statements are true? (Choose two.)

A. EXPIRY_DATEcontains the SYSDATEby default if no date is assigned to it.
B. PRODUCT_NAMEcannot contain duplicate values.
C. PRODUCT_PRICEcan be used in an arithmetic expression even if it has no value stored in it.
D. PRODUCT_PRICEcontains the value zero by default if no value is assigned to it.
E. PRODUCT_IDcan be assigned the PRIMARY KEYconstraint.
F. EXPIRY_DATEcannot be used in arithmetic expressions.

Answer: C,E

NEW QUESTION # 24
Which three items does a direction of a relationship contain?

A. an optionality
B. a cardinality
C. label
D. a unique identifier
E. an attribute
F. an entity

Answer: A,B,C

Explanation:
In data modeling and database design, the direction of a relationship typically includes:
* Option B: a cardinality
* Cardinality refers to the numerical relationships between two entities, indicating the number of instances of one entity that can or must be associated with each instance of another.
* Option C: label
* A label is often used to describe the role or purpose of the relationship in a way that clarifies the nature of the interaction between entities.
* Option D: an optionality
* Optionality indicates whether or not a relationship is mandatory or optional; in other words, it shows if an instance of an entity must be related to an instance of another entity or if it can exist without such a relationship.
Options A, E, and F are not part of the direction of a relationship:
* Option A: An attribute is a property or characteristic of an entity, not the direction of a relationship.
* Option E: A unique identifier uniquely identifies each instance of an entity, not a relationship's direction.
* Option F: An entity is a thing with distinct and independent existence in a database, usually mapped to a table, not a part of the direction of a relationship.

NEW QUESTION # 25
Which two statements are true about the DUAL table?

A. It can be accessed only by the SYS user.
B. It can be accessed by any user who has the SELECT privilege in any schema.
C. It can be used to display only constants or pseudo columns.
D. It can display multiple rows but only a single column.
E. It consists of a single row and single column of VARCHAR2 data type.
F. It can display multiple rows and columns.

Answer: B,E

NEW QUESTION # 26
View the Exhibit and examine the structure of the ORDERS table.

You must select ORDER_ID and ORDER_DATE for all orders that were placed after the last order placed by CUSTOMER_ID 101.
Which query would give you the desired result?

A. SELECT order_id, order_date FROM orders
WHERE order_date > ALL
(SELECT MAX(order_date) FROM orders ) AND customer_id = 101;
B. SELECT order_id, order_date FROM orders
WHERE order_date > IN
(SELECT order_date FROM orders WHERE customer_id = 101);
C. SELECT order_id, order_date FROM orders
WHERE order_date > ALL
(SELECT order_date FROM orders WHERE customer_id = 101);
D. SELECT order_id, order_date FROM orders
WHERE order_date >
ANY
(SELECT order_date FROM orders WHERE customer_id = 101);

Answer: C

NEW QUESTION # 27
You are designing the structure of a table in which two columns have the specifications:
COMPONENT_ID- must be able to contain a maximum of 12 alphanumeric characters and must uniquely identify the row EXECUTION_DATETIME- contains Century, Year, Month, Day, Hour, Minute, Second to the maximum precision and is used for calculations and comparisons between components.
Which two options define the data types that satisfy these requirements most efficiently? (Choose two.)

A. The COMPONENT_IDcolumn must be of CHAR data type.
B. The COMPONENT_IDmust be of ROWID data type.
C. The COMPONENT_IDmust be of VARCHAR2 data type.
D. The EXECUTION_DATETIME must be of DATE data type.
E. The EXECUTION_DATETIME must be of TIMESTAMP data type.
F. The EXECUTION_DATETIME must be of INTERVAL DAY TO SECOND data type.

Answer: A,D

NEW QUESTION # 28
......

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