Oracle Database SQL Expert: 1Z1-047 Exam Premium File as PDF & Test Engine

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Oracle Database SQL Expert Exam FAQs and Straight Answers

Oracle Database SQL Expert Sample Questions:

Question 1

Which statements are correct regarding indexes? (Choose all that apply.)

A. A non-deferrable PRIMARY KEY or UNIQUE KEY constraint in a table automatically creates a unique index.
B. When a table is dropped, the corresponding indexes are automatically dropped.
C. For each DML operation performed, the corresponding indexes are automatically updated.
D. Indexes should be created on columns that are frequently referenced as part of an expression.

Question 2

View the Exhibit and examine the data in EMP and DEPT tables.
In the DEPT table, DEPTNO is the PRIMARY KEY.
In the EMP table, EMPNO is the PRIMARY KEY and DEPTNO is the FOREIGN KEY referencing
the DEPTNO column in the DEPT table.
What would be the outcome of the following statements executed in the given sequence?
DROP TABLE emp;
FLASHBACK TABLE emp TO BEFORE DROP;
INSERT INTO emp VALUES (2.COTT 10); INSERT INTO emp VALUES (3,ING 55);

A. Only the second INSERT statement would succeed because all the constraints except referential integrity constraints that reference other tables are retrieved automatically after the table is flashed back.
B. Both the INSERT statements would fail because all constraints are automatically retrieved when the table is flashed back.
C. Only the first INSERT statement would succeed because all the constraints except the primary key constraint are automatically retrieved after a table is flashed back.
D. Both the INSERT statements would succeed because none of the constraints on the table are automatically retrieved when the table is flashed back.

Question 3

View the Exhibit and examine the description of the EMPLOYEES table.
Evaluate the following SQL statement:
SELECT first_name, employee_id, NEXr_DAY(ADD_MONTHS(hire_date, 6), 1) "Review" FROM
employees;
The query was written to retrieve the FIRST_NAME, EMPLOYEE_ID, and review date for employees.
The review date is the first Monday after the completion of six months of the hiring. The NLS_TERRITORY parameter is set to AMERICA in the session.

Which statement is true regarding this query?

A. The query would not execute because the NEXT_DAY function accepts a string as argument.
B. The query would execute but the output would give review dates that are Sundays.
C. The query would not execute because date functions cannot be nested.
D. The query would execute to give the desired output.

Question 4

Which CREATE TABLE statement is valid?

A. CREATE TABLE ord_details
(ord_no NUMBER(2),
item_no NUMBER(3),
ord_date date DEFAULT SYSDATE NOT NULL,
CONSTRAINT ord_pk PRIMARY KEY (ord_no, item_no));
B. CREATE TABLE ord_details
(ord_no NUMBER(2) UNIQUE, NOT NULL,
item_no NUMBER(3),
ord_date date DEFAULT SYSDATE NOT NULL);
C. CREATE TABLE ord_details
(ord_no NUMBER(2) ,
item_no NUMBER(3),
ord_date date DEFAULT NOT NULL,
CONSTRAINT ord_uq UNIQUE (ord_no),
CONSTRAINT ord_pk PRIMARY KEY (ord_no));
D. CREATE TABLE ord_details
(ord_no NUMBER(2) PRIMARY KEY,
item_no NUMBER(3) PRIMARY KEY,
ord_date date NOT NULL);

Question 5

The following are the steps for a correlated subquery, listed in random order:
1) The WHERE clause of the outer query is evaluated.
2) The candidate row is fetched from the table specified in the outer query.
3) The procedure is repeated for the subsequent rows of the table, till all the rows are processed.
4) Rows are returned by the inner query, after being evaluated with the value from the candidate
row in the outer query. Identify the option that contains the steps in the correct sequence in which
the Oracle server evaluates a correlated subquery.

A. 4,1,2,3
B. 2,1,4,3
C. 4,2,1,3
D. 2,4,1,3

Solutions: