1Z0-071 RELIABLE SOURCE & 1Z0-071 SIMULATED TEST

1z0-071 Reliable Source & 1z0-071 Simulated Test

1z0-071 Reliable Source & 1z0-071 Simulated Test

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Oracle Database SQL Sample Questions (Q180-Q185):

NEW QUESTION # 180
Which three statements are true?

  • A. The SALARY column must have a value .
  • B. The COMMISSION column can contain negative values .
  • C. The DNAME column has a unique constraint.
  • D. The DEPTNO column in the EMP table can contain the value 1.
  • E. The MANAGER column is a foreign key referencing the EMPNO column.
  • F. The DEPTNO column in the EMP table can contain NULLS .
  • G. An index is created automatically in the MANAGER column.

Answer: A,B,F


NEW QUESTION # 181
Which statement adds a column called SALARY to the EMPLOYEES table having 100 rows, which cannot contain null?

  • A. ALTER TABLE EMPLOYEESADD SALARY NUMBER(8,2) DEFAULT CONSTRAINT p_nn NOT NULL;
  • B. ALTER TABLE EMPLOYEESADD SALARY NUMBER(8,2) NOT NULL;
  • C. ALTER TABLE EMPLOYEESADD SALARY NUMBER(8,2) DEFAULT NOT NULL;
  • D. ALTER TABLE EMPLOYEESADD SALARY NUMBER(8,2) DEFAULT 0 NOT NULL;

Answer: D


NEW QUESTION # 182
Examine the command:

What does ON DELETE CASCADE imply?

  • A. When the BOOKStable is dropped, all the rows in the BOOK_TRANSACTIONStable are deleted but the table structure is retained.
  • B. When the BOOKStable is dropped, the BOOK_TRANSACTIONStable is dropped.
  • C. When a value in the BOOKS.BOOK_IDcolumn is deleted, the corresponding value is updated in the BOOKS_TRANSACTIONS.BOOK_IDcolumn.
  • D. When a row in the BOOKStable is deleted, the rows in the BOOK_TRANSACTIONStable whose BOOK_IDmatches that of the deleted row in the BOOKStable are also deleted.

Answer: D


NEW QUESTION # 183
Examine the business rule:
Each student can take up multiple projects and each project can have multiple students.
You need to design an Entity Relationship Model (ERD) for optimal data storage and allow for generating reports in this format:
STUDENT_ID FIRST_NAME LAST_NAME PROJECT_ID PROJECT_NAME PROJECT_TASK
Which two statements are true in this scenario?

  • A. An associative table must be created with a composite key of STUDENT_ID and PROJECT_ID, which is the foreign key linked to the STUDENTS and PROJECTS entities.
  • B. The ERD must have a M:M relationship between the STUDENTSand PROJECTSentities that must be resolved into 1:M relationships.
  • C. The ERD must have a 1:M relationship between the STUDENTSand PROJECTSentities.
  • D. STUDENT_IDmust be the primary key in the STUDENTSentity and foreign key in the PROJECTSentity.
  • E. PROJECT_IDmust be the primary key in the PROJECTSentity and foreign key in the STUDENTSentity.

Answer: A,B

Explanation:
Explanation/Reference:
References:
http://www.oracle.com/technetwork/issue-archive/2011/11-nov/o61sql-512018.html


NEW QUESTION # 184
Examine the structure of the EMPLOYEES table.

You must display the details of employees who have manager with MANAGER_ID 100, who were hired in the past 6 months and who have salaries greater than 10000.

  • A. SELECT last_name, hire_date, salary
    FROM employees
    WHERE manager_id = (SELECT employee_id FROM employees WHERE employee_id = 100) UNION ALL (SELECT last_name, hire_date, salary
    FROM employees
    WHERE hire_date > SYSDATE -180
    INTERSECT
    SELECT last_name, hire_date, salary
    FROM employees
    WHERE salary > 10000);
  • B. SELECT last_name, hire_date, salary
    FROM employees
    WHERE salary > 10000
    UNION ALL
    SELECT last_name, hire_date, salary
    FROM employees
    WHERE manager_ID = (SELECT employee_id FROM employees WHERE employee_id = 100) INETRSECT SELECT last_name, hire_date, salary
    FROM employees
    WHERE hire_date > SYSDATE- 180;
  • C. SELECT last_name, hire_date, salary
    FROM employees
    WHERE manager_id = (SELECT employee_id FROM employees WHERE employee_id = '100') UNION SELECT last_name, hire_date, salary
    FROM employees
    WHERE hire_date > SYSDATE -180
    INTERSECT
    SELECT last_name, hire_date, salary
    FROM employees
    WHERE salary > 10000;
  • D. (SELECT last_name, hire_date, salary
    FROM employees
    WHERE salary > 10000
    UNION ALL
    SELECT last_name, hire_date, salary
    FROM employees
    WHERE manager_ID = (SELECT employee_id FROM employees WHERE employee_id = 100)) UNION SELECT last_name, hire_date, salary
    FROM employees
    WHERE hire_date > SYSDATE -180;

Answer: C


NEW QUESTION # 185
......

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