在文件系统中,若要实现文件拷贝功能,可利用已有的系统调用,它们是
A.create,open,read,write,close
B.create,open,read,write,delete
C.create,open,read,write
D.create,read,write,close
第1题:
A. read
B. read-write
C. read-only
D. write
第2题:
已知当前文件夹中有纯英文文本文件readme.txt,请填空完成功能把readme.txt文件中的所有内容复制到dst.txt中,withopen(’readme.txt’)assrc,open(’dst.txt’,)asdst:dst.write(src.read())。
第3题:
一个文件的权限是-rw-rw-r--,这个文件所有者的权限是什么。()
第4题:
下面答案中属于流的基本操作的是()和()。
第5题:
以下是SD卡读取权限的是()
第6题:
What is the default SNMP permision level on Junos devices?()
第7题:
You run a script that completes successfully using SQL*Plus that performs these actions: 1. Creates a multitenant container database (CDB) 2. Plugs in three pluggable databases (PDBs) 3. Shuts down the CDB instance 4. Starts up the CDB instance using STARTUP OPEN READ WRITE Which two statements are true about the outcome after running the script?()
第8题:
Which of the following is a prerequisite for running DBMS_TDB.CHECK_DB to a successful completion?()
第9题:
在Linux底层文件访问中的大多数操作都是围绕文件描述符来展开的其中()函数是内核向进程返回一个文件描述符为以后使用。
第10题:
not-accessible,accessible-for-notify,read-only,read-write,read-create
not-accessible,read-only,read-write,read-create,accessible-for-notify
read-only,read-write,read-create,accessible-for-notify,not-accessible
read-only,read-write,read-create,not-accessible,accessible-for-notify
第11题:
android.permission.READ_EXTERNAL_STORAGE
android.permission.WRITE_EXTERNAL_STORAGE
android.permission.WRITE_CALENDAR
android.permission.READ_PHONE_STAT
第12题:
The seed will be in mount state.
The seed will be opened read-only.
The seed will be opened read/write.
The other PDBs will be in mount state.
The other PDBs will be opened read-only.
The PDBs will be opened read/write.
第13题:
SNMPv2的5种访问级别由小到大排列正确的是()。
第14题:
如果MIB对象的访问属性为reAD-write,SNMP访问模式为reAD-write时,可进行的操作有()
第15题:
在ASP中,Application对象的()方法用于控制应用程序变量的读写操作。
第16题:
SNMP不能改变主机的IP地址是由于IP地址表中管理对象的访问特性为()
第17题:
下列语句中哪条是错误的()?
第18题:
You have a read-only tablespace on read-only media. You want to perform a media recovery on the existing data files, but using a backup control file. The backup control file indicates that the status of the read-only tablespace was read/write when the control file was backed up. What should you consider?()
第19题:
Adam is working as a Database Administrator (DBA) for TeleSoft Corporation. His database is running in the ARCHIVELOG mode. During database startup, he discovers that one of the disks crashed, resulting in the permanent loss of a read-write USERS tablespace. The USERS01.dbf datafile belongs to the USERS tablespace and is 500 MB in size. He needs to recover the USERS tablespace from the backup. While reviewing the backup details, he discovers that the most recent available backup is five days old. This backup was taken when the USERS tablespace was read-only. After correcting the hardware problem that caused the failure, what should Adam do to recover the USERS tablespace?()
第20题:
Which operations require undo data()
第21题:
The database must be in read-write mode.
The database must have no external files.
The database must open in read-only mode.
The database must be mounted but not opened.
第22题:
The seed will be in mount state.
The seed will be opened read-only.
The seed will be opened read/write.
The other PDBs will be in mount state.
The other PDBs will be opened read-only.
The PDBs will be opened read/write.
第23题:
Committing a transaction
Flashing back a transaction
Recovering a failed transaction
Running a read-consistent query
Changing a tablespace status from READ ONLY to READ WRITE