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提问人:网友fz_1981 发布时间:2022-01-07
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WhichtwocodefragmentsaremostlikelytocauseaStackOverflowError?()

A.int[]x={1,2,3,4,5};for(inty=0;y<6;y++)System.out.println(x[y]);

B.staticint[]x={7,6,5,4};static{x[1]=8;x[4]=3;}

C.for(inty=10;y<10;y++)doStuff(y);

D.voiddoOne(intx){doTwo(x);}voiddoTwo(inty){doThree(y);}voiddoThree(intz){doTwo(z);}

E.for(intx=0;x<1000000000;x++)doStuff(x);

F.voidcounter(inti){counter(i);}

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更多“WhichtwocodefragmentsaremostlikelytocauseaStackOverflowError?()”相关的问题
第1题
Examine the structure of the EMPLOYEES and DEPARTMENTS tables:EMPLOYEESColumn name Data type RemarksEMPLOYEE_ID NUMBER NOT NULL, Primary KeyEMP_NAME VARCHAR2 (30)JOB_ID VARCHAR2 (20)SALARY NUMBERMGR_ID NUMBER References EMPLOYEE_ID COLUMNDEPARTMENT ID NUMBER Foreign key to DEPARTMENT IDcolumn of the DEPARTMENTS tableDEPARTMENTSColumn name Data type RemarksDEPARTMENT_ID NUMBER NOT NULL, Primary KeyDEPARTMENT_NAME VARCHAR2(30)MGR_ID NUMBER References MGR_ID column of theEMPLOYEES tableEvaluate this SQL statement:SELECT employee_id, e.department_id, department_name,salaryFROM employees e, departments dWHERE e. department_id = d.department_id;Which SQL statement is equivalent to the above SQL statement?()

A. SELECT employee_id, department_id, department_name, salary FROM employees WHERE department_id IN (SELECT department_id FROM departments);

B. SELECT employee_id, department_id, department_name, salary FROM employees NATURAL JOIN departments;

C. SELECT employee_id, d.department_id, department_name, salary FROM employees e JOIN departments d ON e.department _ id = d. department_id;

D. SELECT employee_id, department_id, department_name, Salary FROM employees JOIN departments USING (e.department_id, d.department_id);

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第2题
The EMP table contains these columns:LAST NAME VARCHAR2(25)SALARY NUMBER(6,2)DEPARTMENT_ID NUMBER(6)You need to display the employees who have not been assigned to any department.You write the SELECT statement:SELECT LAST_NAME, SALARY, DEPARTMENT_IDFROM EMPWHERE DEPARMENT_ID = NULL;What is true about this SQL statement?()

A. The SQL statement displays the desired results.

B. The column in the WHERE clause should be changed to display the desired results.

C. The operator in the WHERE clause should be changed to display the desired results.

D. The WHERE clause should be changed to use an outer join to display the desired results.

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第3题
Examine the description of the MARKS table:STD_ID NUMBER(4)STUDENT_NAME VARCHAR2(30)SUBJ1 NUMBER(3)SUBJ2 NUMBER(3)SUBJ1 and SUBJ2 indicate the marks obtained by a student in two subjects.Examine this SELECT statement based on the MARKS table:SELECT subj1+subj2 total_marks, std_idFROM marksWHERE subj1 > AVG(subj1) AND subj2 > AVG(subj2)ORDER BY total_ marks;What is the result of the SELECT statement?()

A. The statement executes successfully and returns the student ID and sum of all marks for each student who obtained more than the average mark in each subject.

B. The statement returns an error at the SELECT clause.

C. The statement returns an error at the WHERE clause.

D. The statement returns an error at the ORDER BY clause.

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第4题
Which /SQL*Plus feature can be used to replace values in the WHERE clause?()

A. Substitution variables

B. Replacement variables

C. Prompt variables

D. Instead-of variables

E. This feature cannot be implemented through /SQL*Plus.

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第5题
Identify three valid methods of opening, pluggable databases (PDBs).()

A. ALTER PLUGGABLE DATABASE OPEN ALL ISSUED from the root

B. ALTER PLUGGABLE DATABASE OPEN ALL ISSUED from a pdb

C. ALTER PLUGGABLE DATABASE PDB OPEN issued from the seed

D. ALTER DATABASE PDB OPEN issued from the root

E. ALTER DATABASE OPEN issued from that pdb

F. ALTER PLUGGABLE DATABASE PDB OPEN issued from another pdb

G. ALTER PLUGGABLE DATABASE OPEN issued from that pdb

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第6题
Given:Whatistheresult?()

A.Nooutputisproduced.123

B.Nooutputisproduced.234

C.Nooutputisproduced.1234

D.Anexceptionisthrownatruntime.123

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第7题
TheAutomaticDatabaseDiagnosticMonitor(ADDM)analysisrunsevery60minutesonyourdatabase.Yourdatabaseisfacingaseriesofinterrelatedproblemsoveraperiodoftwohours.YouneedtoensurethattheADDManalysisisrunoveratimespanoftwohoursinfuture.Whatwouldyoudo?()

A.CreatetwocustomADDMtasks.

B.ModifytheAWRsnapshottimeintervaltotwohours.

C.Createanewschedulerwindowforatimeperiodoftwohours.

D.ModifytheAutomaticWorkloadRepository(AWR)snapshotretentionperiodtotwohours.

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第8题
Examine the structure if the EMPLOYEES table:Column name Data Type RemarksEMPLOYEE_ID NUMBER NOT NULL, Primary KeyEMP_NAME VARCHAR2(30)JOB_ID VARCHAR2(20) NOT NULLSAL NUMBERMGR_ID NUMBER References EMPLOYEE_ID columnDEPARTMENT_ID NUMBER Foreign key to DEPARTMENT_IDcolumn of the DEPARTMENTS tableYou need to create a view called EMP_VU that allows the user to insert rows through the view. Which SQL statement, when used to create the EMP_VU view, allows the user to insert rows?()

A. CREATE VIEW emp_Vu AS SELECT employee_id, emp_name, department_id FROM employees WHERE mgr_id IN (102, 120);

B. CREATE VIEW emp_Vu AS SELECT employee_id, emp_name, job_id department_id FROM employees WHERE mgr_id IN (102, 120);

C. CREATE VIEW emp_Vu AS SELECT department_id, SUM(sal) TOTALSAL FROM employees WHERE mgr_id IN (102, 120) GROUP BY department_ id;

D. CREATE VIEW emp_Vu AS SELECT employee_id, emp_name, job_id, DISTINCT department_id FROM employees;

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第9题
WhichstatementistrueabouttheManageabilityMonitor(MMON)backgroundproces()

A.Ittransfersstatisticsfrommemorytodiskatregularintervals.

B.ItcoordinatestherebalanceactivityfordiskgroupswhenASMisused.

C.ItcommunicateswiththeAutomaticStorageManagement(ASM)instanceonbehalfofthedatabaseinstance.

D.ItperformsdynamicmemorymanagementwhenAutomaticSharedMemoryManagementisenabledforthedatabaseinstance.

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第10题
Evaluatethefollowingcommandanditsoutput:SQL>SELECT*FROMdba_temp_free_space;TABLESPACE_NAMETABLESPACE_SIZEALLOCATED_SPACEFREE_SPACELMTEMP250609664101048576149561088Whichtwostatementscorrectlyinterprettheoutput?()

A.FREE_SPACEindicatesonlythespacethatiscurrentlyunallocated.

B.ALLOCATED_SPACEindicatesonlythespacecurrentlyallocatedandinuse.

C.FREE_SPACEindicatesonlythespacethatiscurrentlyallocatedandavailableforreuse.

D.ALLOCATED_SPACEindicatesboththespacecurrentlyallocatedandused,andthespacethatisavailableforreuse.

E.FREE_SPACEindicatesboththespacethatiscurrentlyallocatedandavailableforreuse,andthespacethatiscurrentlyunallocated.

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