[单选题] The driver fell while driving and killed an old man.
A. sleeping
B. asleep
C. to sleep
D. a sleep

[填空题]The driver fell ( ) while driving and killed an old man.(sleep)

[简答题]Bob thought self-driving cars were actually (safe)____than vehicles driven by humans.（5.0）

[单选题]C语言中 while 和 do-while 循环的主要区别是（）。
A.do-while 的循环体至少无条件执行一次
B.while的循环控制条件比 do-while的循环控制条件更严格
C.do-while 允许从外部转到循环体内
D.do-while 的循环体不能是复合语句

[简答题]The more people you meet,especially while ( do )____volunteer work,the more contacts you' ll have.（5.0）

[不定项选择题]While backing up to the Oracle Fast Recovery Area (FRA), you

Determined the backup istaking too long and suspect a performance

Bottleneck. Which three are true about diagnosing and tuning these

Problems? (Choose three.)

A. If an RMAN BACKUP VALIDATE command takesroughly the same time as an
Actual backup, then both read and write I/O are likely bottlenecks.
B. Setting DBWR_IO_SLAVES to a non zero value can improve backup
Performance when using synchronous I/O.
C. If an RMAN BACKUP VALIDATE command takes noticeably lessthan an actual
Backup, then write I/O is a likely bottleneck.
D. If an RMAN BACKUP VALIDATE command takesroughly the same time as an
Actual backup, then read I/O is a likely bottleneck.
E. Data files with a high value in
V$BACKUP_SYNC_IO.DISCRETE_BYTES_PER_SECOND are a potential
Performance bottleneck when synchronous I/O is used.
F. Setting DBWR_IO_SLAVES to a non zero value can improve backup
Performance when using asynchronous I/O/
G. Data files with a high value in V$BACKUP_ASYNC_IO.SHORT_WAITS are a
Potential performance bottleneck when asynchronous I/O is used.

[判断题]log语句SBR edundant HW failure，while STM orders SB表示为列车常用制动反馈超时。 （ ）
A.正确
B.错误

[不定项选择题]While backing up to an SBT channel, you determine that the read phase

Of your compressed Recovery Manager (RMAN) incremental level 0 backup

Is a bottleneck. FORCE LOGGING is enabled for the database. Which two

Could improve read performance? (Choose two.)

A.

Increase the size of tape I/O buffers.

B.

Disable FORCE LOGGING for the database.

C.

Increase the size of the database buffer cache.

D.

Enable asynchronous disk I/O.

E. Increase the level of RMAN multiplexing.

[判断题]88．log语句SBR edundant HW failure，while STM orders SB表示为列车常用制动反馈超时。 （ ）
A.正确
B.错误

[判断题]while ture do 语句会让机器人程序陷入死循环，不建议使用。
A.正确
B.错误

[单选题]语句while(!E);中的表达式!E等价于（）。
A.E==0
B.E!=1
C.E!=0
D.E==1

[填空题]以下do-while语句中循环体的执行次数是（ ）.
a=10;
b=0;
do { b+=2; a-=2+b; } while (a>=0);

[填空题]若输入字符串.abcde<回车>,则以下while循环体将执行 （ ） 次.While((ch=getchar(.))=='e') printf("*");

[判断题]若有说明int c;则while(c=getchar());是正确的C语句。
A.正确
B.错误

[填空题]程序段int k=10; while(k=0) k=k-1循环体语句执行（ ）次.

[判断题]RPA中的While循环会先判断条件是否满足, 如果满足, 再执行循环体, 直到判断条件不满足, 则跳出循环。
A.正确
B.错误

[单选题]while(fabs(t)<1e-5)if(!s/10)break;循环结束的条件是( )。
A.t>=1e-5&&t<=-1e-5&&s>-10&&s<10
B.fabs(t)<1e-5&&!s/10
C.fabs(t)<1e-5
D.s/10==0