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单选题
Mary is a clerk（）a job in a top bookstore.
A
in
B
with
C
to
D
for
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Examine the data in the EMPLOYEES and EMP_HIST tables:EMPLOYEESNAME DEPT_ID MGR_ID JOB_ID SALARYEMPLOYEE_ID101 Smith 20 120 SA_REP 4000102 Martin 10 105 CLERK 2500103 Chris 20 120 IT_ADMIN 4200104 John 30 108 HR_CLERK 2500105 Diana 30 108 IT_ADMIN 5000106 Smith 40 110 AD_ASST 3000108 Jennifer 30 110 HR_DIR 6500110 Bob 40 EX_DIR 8000120 Ravi 20 110 SA_DIR 6500EMP HISTEMPLOYEE_ID NAME JOB_ID SALARY101 Smith SA_CLERK 2000103 Chris IT_CLERK 2200104 John HR_CLERK 2000106 Smith AD_ASST 3000108 Jennifer HR_MGR 4500The EMP_HIST table is updated at the end of every year. The employee ID, name, job ID, and salary of each existing employee are modified with the latest data. New employee details are added to the table.Which statement accomplishes this task?（）A. UPDATE emp_hist SET employee_id, name, job_id, salary = (SELECT employee_id, name, job_id, salary FROM employees) WHERE employee_id IN (SELECT employee_id FROM employees);B. MERGE INTO emp_hist eh USING employees e ON (eh.employee_id = e.employee_id) WHEN MATCHED THEN UPDATE SET eh.name = e.name, eh.job_id = e.job_id, eh.salary = e.salary WHEN NOT MATCHED THEN INSERT VALUES (e.employee id, e.name, job id, e.salary);C. MERGE INTO emp_hist eh USING employees e ON (eh.employee_id = e.employee_id) WHEN MATCHED THEN UPDATE emp hist SET eh.name = e.name, eh.job_id = e.job_id, eh.salary = e.salary WHEN NOT MATCHED THEN INSERT INTO emp_hist VALUES (e.employees_id, e.name, e.job_id, e.salary);D. MERGE INTO emp_hist eh USING employees e WHEN MATCHED THEN UPDATE emp_hist SET eh.name = e.name, eh.job_id = e.job_id, eh.salary = e.salary WHEN NOT MATCHED THEN INSERT INTO emp_hist VALUES (e.employees_id, e.name, e.job_id, e.salary);
考题
Which command will create a group called ‘delivery’and set the administrators to john’ and ‘mary’?()
A.mkgroup -A=john,mary deliveryB.groupadd -A=john,mary deliveryC.mkgroup adms=john,mary deliveryD.groupadd adms=john,mary delivery
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Which command will create a group called ’delivery’ and set the administrators to ’john’ and ’mary’？（） A、mkgroup -A=john，mary deliveryB、groupadd -A=john，mary deliveryC、mkgroup adms=john，mary deliveryD、groupadd adms=john，mary delivery
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单选题Consider the following table called EMPLOYEES: ID FIRSTNAME LASTNAME JOB LEVEL CLERK 3 If the following SQL statement is executed, how many rows will be deleted? DELETE FROM employees WHERE 1 = 1（）A
0B
1C
3D
6
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单选题Looking for a top job? Contact job services.com for a better presented CV.A
Job services.com will find you a better job，depending on your CV.B
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Students with a bachelor’s degree in humanities.B
People with an MBA degree from top universities.C
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单选题What is true about European chief executives?A
They are dynamic and harsh in management.B
They will be hard on others once they get to the top.C
They have less job security than their American counterparts.D
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单选题Mary: Hi, Erica. How did you do in the IELTS test? You took it two weeks ago, didn’t you? Erica: Yes, Mary. It was certainly a new experience for me. ______ It was quite a long day and I was very nervous. Mary: ______ Erica: No, nothing special. I just studied the vocabulary by myself in the local library.A
I did a good job. ; Anything special?B
Therefore, there’s nothing to feel sorry about. ; Will you be nervous next time?C
I was lucky enough. ; Is there anything special during the exam?D
I didn’t do too well. ; Did you do any specific practice for the test?
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多选题User SCOTT executes the following command on the EMP table but has not issued COMMIT， ROLLBACK， or any data definition language （DDL） command： SQL SELECT ename FROM emp 2 WHERE job=’CLERK’ FOR UPDATE OF empno； SCOTT has opened another session to work with the database instance. Which three operations wouldwait when issued in SCOTT’s second session（）ALOCK TABLE emp IN SHARE MODE；BLOCK TABLE emp IN EXCLUSIVE MODE；CUPDATE emp SET sal=sal*1.2 WHERE job=MANAGER；DINSERT INTO emp（empno，ename） VALUES （1289，’Harry’）；ESELECT ename FROM emp WHERE job=’CLERK’ FOR UPDATE OF empno；
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多选题User SCOTT executes the following command on the EMP table but has not issued COMMIT， ROLLBACK， orany data definition language （DDL） command： SQL SELECT ename FROM emp WHERE job=’CLERK’ FOR UPDATE OF empno； SCOTT has opened another session to work with the database instance. Which three operations would waitwhen issued in SCOTT’s second session（）ALOCK TABLE emp IN SHARE MODE；BLOCK TABLE emp IN EXCLUSIVE MODE；CUPDATE emp SET sal=sal*1.2 WHERE job=ANAGER？UPDATE emp SET sal=sal*1.2 WHERE job=？ANAGER？DINSERT INTO emp（empno，ename） VALUES （1289，’Harry’）；ESELECT ename FROM emp WHERE job=’CLERK’ FOR UPDATE OF empno
考题
单选题If you are a ‘lifer’, ______A
you take less time to make it to the top.B
you have a long list of previous jobs.C
you tend to move less far up in the company.D
you keep changing your job all your life.
考题
单选题Examine the data in the EMPLOYEES table. EMPLOYEES 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 IT_ADMIN 5000 106 Smith 40 110 AD.ASST 3000 108 Jennifer 30 110 HR_DIR 6500 110 Bob 40 EK_DIR 8000 120 Revi 20 110 SA_DIR 6500 On the EMPLOYEES table, EMPLOYEE_ID is the primary key. MGR_ID is the ID of managers and refers to the EMPLOYEE_ID. The JOB_ID column is a NOT NULL column. Evaluate this DELETE statement: DELETE employee_id, salary, job_id FROM employees WHERE dept_id = 90; Why does the DELETE statement fail when you execute it?（）A
There is no row with dept_id 90 in the EMPLOYEES table.B
You cannot delete the JOB_ID column because it is a NOT NULL column.C
You cannot specify column names in the DELETE clause of the DELETE statement.D
You cannot delete the EMPLOYEE_ID column because it is the primary key of the table.
考题
单选题Compared to America, ______A
there is more competition for chief executives in Europe.B
lifers in Europe have more chances to get to the top.C
it takes lifers in Europe less time to get to the top.D
executives in Europe hop less frequently from job to job.
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