Oracle认证考试

Examine the data of the EMPLOYEES table. EMPLOYEES (EMPLOYEE_ID is the primary key. MGR_ID is the ID of managers and refers to the EMPLOYEE_ID) EMP_NAME DEPT_ID MGR_ID JOB_ID SALARY EMPLOYEE_ID 101 Smith 20 120 SA_REP 4000 102 Martin 10 105 CLERK 2500 10

题目

Examine the data of the EMPLOYEES table. EMPLOYEES (EMPLOYEE_ID is the primary key. MGR_ID is the ID of managers and refers to the EMPLOYEE_ID) EMP_NAME DEPT_ID MGR_ID JOB_ID SALARY EMPLOYEE_ID 101 Smith 20 120 SA_REP 4000 102 Martin 10 105 CLERK 2500 103 Chris 20 120 IT_ADMIN 4200 104 John 30 108 HR_CLERK 2500 105 Diana 30 108 HR_MGR 5000 106 Bryan 40 110 AD_ASST 3000 108 Jennifer 30 110 HR_DIR 6500 110 Bob 40 EX_DIR 8000 120 Ravi 20 110 SA_DIR 6500 Which statement lists the ID, name, and salary of the employee, and the ID and name of the employee's manager, for all the employees who have a manager and earn more than 4000?（）

  • A、SELECT employee_id "Emp_id", emp_name "Employee", salary, employee_id "Mgr_id", emp_name "Manager" FROM employees WHERE salary > 4000;
  • B、SELECT e.employee_id "Emp_id", e.emp_name "Employee",
  • C、salary,
  • D、employee_id "Mgr_id", m.emp_name "Manager" FROM employees e, employees m WHERE e.mgr_id = m.mgr_id AND e.salary > 4000;
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相似问题和答案

第1题：

Examine the following RMAN script:Which statement describes the purpose of the script?()

A. The data file is checked for physical corruption and backed up if found clean.

B. The backup of data file 5 is performed and the interactive messages during the backup are suppressed.

C. The existing backup for the data file is checked and the backup is performed if there are changes in the data file after the last backup.

D. The backup of data file 5 is performed and all SQL statements that are executed during RMAN compilation and their results are displayed


参考答案：D

第2题：

View the Exhibit and examine the Data Pump architecture. Identify the numbered components.()

A. 1 - Oracle Loader, 2 - Oracle Data Pump, 3 - Direct Path API

B. 1 - Oracle Data Pump, 2 - Direct Path API, 3 - Oracle Loader

C. 1 - Direct Path API, 2 - Oracle Loader, 3 - Oracle Data Pump

D. 1 - Oracle Loader, 2 - Direct Path API, 3 - Oracle Data Pump


参考答案：A

第3题：

Methods and techniques used to examine cost and technical data are called feasibility studies. The economic aspects of a feasibility study include interest rates, present worth factors, operating costs, depreciation and _____.

A . Capitalization costs.

B . Technical skill requirements.

C . Technology forecasting.

D . Strategic marketing intelligence.

E . All of the above.


正确答案：A

第4题：

Exhibit:Examine the data in the EMPLOYEES table.Examine the subquery:SELECT last_nameFROM employeesWHERE salary IN (SELECT MAX(salary)FROM employeesGROUP BY department_id);Which statement is true?()

A. The SELECT statement is syntactically accurate.

B. The SELECT statement does not work because there is no HAVING clause.

C. The SELECT statement does not work because the column specified in the GROUP BY clause is not in the SELECT list.

D. The SELECT statement does not work because the GROUP BY clause should be in the main query and not in the subquery.


参考答案：A

第5题：

Examine the following RMAN script:RMAN> run {debug on;allocate channel c1 type disk;backup datafile 5;}Which statement describes the purpose of the script?()

A. The data file is checked for physical corruption and backed up if found clean.

B. The backup of data file 5 is performed and the interactive messages during the backup are suppressed.

C. The existing backup for the data file is checked and the backup is performed if there are changes in the data file after the last backup.

D. The backup of data file 5 is performed and all SQL statements that are executed during RMAN compilation and their results are displayed


参考答案：D

第6题：

View the exhibit and examine the output.Which statement can be an inference from the output?()

A. The FRA disk group has an asynchronous I/O bottleneck

B. The least number of I/Os are performed on the last data file in the list

C. The number of times that the backup or restore process directed the OS to wait until an I/O was complete is the highest for the last data file in the list

D. The number of times that the backup or restore process made an OS call to poll for I/O completion in Nonblocking mode is the least for the FRA disk group


参考答案：A

第7题：

Examine the following command that is executed for the TRANSPORT table in the SH schema:Which statement describes the significance of this command?()

A. It collects statistics into the pending area in the data dictionary

B. It creates a virtual hidden column in the CUSTOMERS_OBE table

C. It collects statistics with AUTO_SAMPLE_SIZE for ESTIMATE_PERCENT

D. It creates a histogram to hold skewed information about the data in the columns


参考答案：B

第8题：

The context clue used in the sentence “Many United Nations’ employe.es are polyglots. Ms. Mary, for example, speaks five languages” is ___.


参考答案：Example

第9题：

Examine the data from the ORDERS and CUSTOMERS tables.Evaluate the SQL statement:What is the result when the query is executed?()

A.

B.

C.

D. The query fails because the subquery returns more than one row.

E. The query fails because the outer query and the inner query are using different tables.


参考答案：D

第10题：

Examine the following scenario:The target database instance is running. The most recent backup available for the target database was taken two days ago. Log files switches have occurred in last two days. The target database is duplicated on the same host, using the Recovery Manager (RMAN) duplicate command as follows:Which statement is true about the duplicate database in this scenario?（）

A. It contains data till the last backup

B. It contains all data from target database until the current time

C. It contains all data from only the committed transactions in the target database

D. It contains all data except that which is used by the transactions in the current online redo file of target database


参考答案：D

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