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Exam : Oracle 1Z1-047
Title : Oracle? Database SQL Expert


1. View the Exhibit and examine the description of the DEPARTMENTS and EMPLOYEES tables.
To retrieve data for all the employees for their EMPLOYEE_ID, FIRST_NAME, and DEPARTMENT NAME, the following SQL statement was written:
The desired output is not obtained after executing the above SQL statement. What could be the reason for this?
A. The NATURAL JOIN clause is missing the USING clause.
B. The table prefix is missing for the column names in the SELECT clause.
C. The DEPARTMENTS table is not used before the EMPLOYEES table in the FROM clause.
D. The EMPLOYEES and DEPARTMENTS tables have more than one column with the same column name and data type.
Answer: D

2. Which three statements are true regarding single-row functions? (Choose three.)
A. They can accept only one argument.
B. They can be nested up to only two levels.
C. They can return multiple values of more than one data type.
D. They can be used in SELECT, WHERE, and ORDER BY clauses.
E. They can modify the data type of the argument that is referenced.
F. They can accept a column name, expression, variable name, or a user-supplied constant as arguments.
Answer: DEF

3. View the Exhibit and examine the structure of the MARKS_DETAILS and MARKStables.
Which is the best method to load data from the MARKS_DETAILStable to the MARKStable?
A. Pivoting INSERT
B. Unconditional INSERT
C. Conditional ALL INSERT
D. Conditional FIRST INSERT
Answer: A

4. Which statements are true? (Choose all that apply.)
A. The data dictionary is created and maintained by the database administrator.
B. The data dictionary views can consist of joins of dictionary base tables and user-defined tables.
C. The usernames of all the users including the database administrators are stored in the data dictionary.
D. The USER_CONS_COLUMNS view should be queried to find the names of the columns to which a constraint applies.
E. Both USER_OBJECTS and CAT views provide the same information about all the objects that are owned by the user.
F. Views with the same name but different prefixes, such as DBA, ALL and USER, use the same base tables from the data dictionary
Answer: CDF

5. Evaluate the CREATE TABLE statement:
Which statement is true regarding the PROD_ID_PK constraint?
A. It would be created only if a unique index is manually created first.
B. It would be created and would use an automatically created unique index.
C. It would be created and would use an automatically created nonunique index.
D. It would be created and remains in a disabled state because no index is specified in the command.
Answer: B

6. View the Exhibit and examine the structure of the EMPLOYEES table.
Which statement is true regarding the output for this command?
A. It would return a hierarchical output starting with the employee whose EMPLOYEE_ID is 101, followed by his or her peers.
B. It would return a hierarchical output starting with the employee whose EMPLOYEE_ID is 101, followed by the employee to whom he or she reports.
C. It would return a hierarchical output starting with the employee whose EMPLOYEE_ID is 101, followed by employees below him or her in the hierarchy.
D. It would return a hierarchical output starting with the employee whose EMPLOYEE_ID is101, followed by employees up to one level below him or her in the hierarchy.
Answer: C

7. Given below is a list of datetime data types and examples of values stored in them in a random order:
Identify the option that correctly matches the data types with the values.
A. 1-d, 2-c, 3-a, 4-b
B. 1-b, 2-a, 3-c, 4-d
C. 1-b, 2-a, 3-d, 4-c
D. 1-d, 2-c, 3-b, 4-a
Answer: A

8. Which two statements are true regarding operators used with subqueries? (Choose two.)
A. The NOT IN operator is equivalent to IS NULL.
B. The <ANY operator means less than the maximum.
C. =ANY and =ALL operators have the same functionality.
D. The IN operator cannot be used in single-row subqueries.
E. The NOT operator can be used with IN, ANY and ALL operators.
Answer: BE