【数据库系统工程师200605】【5】若某计算机系统是由500个元器件构成的串联系统，且每个元器件的失效率均为10^-7/H，在不考虑其他因素对可靠性的影响时，该计算机系统的平均故障间隔时间为（5）小时。

真题详情及解析

【数据库系统工程师200605】【3-4】高速缓存cache与主存间采用全相联地址映像方式，高速缓存的容量为4MB，分为4块，每块1MB，主存容量为256MB。若主存读写时间为30ns，高速缓存的读写时间为3ns，平均读写时间为3.27ns，则该高速缓存的命中率为（3）%。若地址变换表如下所示，则主存地址为8888888H时，高速缓存地址为（4）H。

真题详情及解析

【数据库系统工程师200605】【3-4】高速缓存cache与主存间采用全相联地址映像方式，高速缓存的容量为4MB，分为4块，每块1MB，主存容量为256MB。若主存读写时间为30ns，高速缓存的读写时间为3ns，平均读写时间为3.27ns，则该高速缓存的命中率为（3）%。若地址变换表如下所示，则主存地址为8888888H时，高速缓存地址为（4）H。

真题详情及解析

【数据库系统工程师200605】【2】若浮点数的阶码用移码表示，尾数用补码表示。两规格化浮点数相乘，最后对结果规格化时，右规的右移位数最多为（2）位。

真题详情及解析

【数据库系统工程师200605】【1】两个同符号的数相加或异符号的数相减，所得结果的符号位SF和进位标志CF进行（1）运算为1时，表示运算的结果产生溢出。

真题详情及解析

【数据库系统工程师200505】【71-75】Melissa and LoveLetter made use of the trust that exists between friends or colleagues. Imagine receiving an （71） from a friend who asks you to open it. This is what happens with Melissa and several other similar email （72）. Upon running, such worms usually proceed to send themselves out to email addresses from the victim's address book, previous emails, web pages （73）
As administrators seek to block dangerous email attachments through the recognition of well-known （74）, virus writers use other extensions to circumvent such protection. Executable (.exe) files are renamed to .bat and .cmd plus a whole list of other extensions and will still nm and successfully infect target users.
Frequently, hackers try to penetrate networks by sending an attachment that looks like a flash movie, which, while displaying some cute animation, simultaneously runs commands in the background to steal your passwords and give the （75） access to your network.

真题详情及解析

【数据库系统工程师200505】【71-75】Melissa and LoveLetter made use of the trust that exists between friends or colleagues. Imagine receiving an （71） from a friend who asks you to open it. This is what happens with Melissa and several other similar email （72）. Upon running, such worms usually proceed to send themselves out to email addresses from the victim's address book, previous emails, web pages （73）
As administrators seek to block dangerous email attachments through the recognition of well-known （74）, virus writers use other extensions to circumvent such protection. Executable (.exe) files are renamed to .bat and .cmd plus a whole list of other extensions and will still nm and successfully infect target users.
Frequently, hackers try to penetrate networks by sending an attachment that looks like a flash movie, which, while displaying some cute animation, simultaneously runs commands in the background to steal your passwords and give the （75） access to your network.

真题详情及解析

【数据库系统工程师200505】【71-75】Melissa and LoveLetter made use of the trust that exists between friends or colleagues. Imagine receiving an （71） from a friend who asks you to open it. This is what happens with Melissa and several other similar email （72）. Upon running, such worms usually proceed to send themselves out to email addresses from the victim's address book, previous emails, web pages （73）
As administrators seek to block dangerous email attachments through the recognition of well-known （74）, virus writers use other extensions to circumvent such protection. Executable (.exe) files are renamed to .bat and .cmd plus a whole list of other extensions and will still nm and successfully infect target users.
Frequently, hackers try to penetrate networks by sending an attachment that looks like a flash movie, which, while displaying some cute animation, simultaneously runs commands in the background to steal your passwords and give the （75） access to your network.

真题详情及解析

【数据库系统工程师200505】【71-75】Melissa and LoveLetter made use of the trust that exists between friends or colleagues. Imagine receiving an （71） from a friend who asks you to open it. This is what happens with Melissa and several other similar email （72）. Upon running, such worms usually proceed to send themselves out to email addresses from the victim's address book, previous emails, web pages （73）
As administrators seek to block dangerous email attachments through the recognition of well-known （74）, virus writers use other extensions to circumvent such protection. Executable (.exe) files are renamed to .bat and .cmd plus a whole list of other extensions and will still nm and successfully infect target users.
Frequently, hackers try to penetrate networks by sending an attachment that looks like a flash movie, which, while displaying some cute animation, simultaneously runs commands in the background to steal your passwords and give the （75） access to your network.

真题详情及解析

【数据库系统工程师200505】【71-75】Melissa and LoveLetter made use of the trust that exists between friends or colleagues. Imagine receiving an （71） from a friend who asks you to open it. This is what happens with Melissa and several other similar email （72）. Upon running, such worms usually proceed to send themselves out to email addresses from the victim's address book, previous emails, web pages （73）
As administrators seek to block dangerous email attachments through the recognition of well-known （74）, virus writers use other extensions to circumvent such protection. Executable (.exe) files are renamed to .bat and .cmd plus a whole list of other extensions and will still nm and successfully infect target users.
Frequently, hackers try to penetrate networks by sending an attachment that looks like a flash movie, which, while displaying some cute animation, simultaneously runs commands in the background to steal your passwords and give the （75） access to your network.

真题详情及解析