【数据库系统工程师201705】【5】己知数据信息为16位，最少应附加（5）位校验位，才能实现海明码纠错。

真题详情及解析

【数据库系统工程师201705】【4】某系统由下图所示的冗余部件构成。若每个部件的千小时可靠度都为R，则该系统的千小时可靠度为（4）。

真题详情及解析

【数据库系统工程师201705】【3】计算机系统中常用的输入/输出控制方式有无条件传送、中断、程序查询和DMA方式等。当采用（3）方式时，不需要CPU执行程序指令来传送数据。

真题详情及解析

【数据库系统工程师201705】【2】要判断字长为16位的整数a的低四位是否全为0，则（2）

真题详情及解析

【数据库系统工程师201705】【1】CPU执行算术运算或者逻辑运算时，常将源操作数和结果暂存在（1）中。

真题详情及解析

【数据库系统工程师201605】【71-75】In the fields of physical security and information security,access control is the selective restriction of access to a place or other resource.The act of accessing may mean consuming,entering,or using.Permission to access a resource is called authorization（授权）.
An access control mechanism （71） between a user（or a process executing on behalf of a user）and system resources,such as applications,operating systems,firewalls;routers,files,and databases.The system must first authenticate（验证）a user seeking access.Typically the authentication function determines whether the user is （72） to access the system at all.
Then the access control function determines if the specific requested access by this user is permitted.A security administrator maintains an authorization database that specifies what type of access to which resources is allowed for this user.The access control function consults this database to determine whether to （73） access.An auditing function monitors and keeps a record of user accesses to system resources.
In practice,a number of （74） may cooperatively share the access control function.All Operating systems have at least a rudimentary（基本的）.and in many cases a quite robust,access control component.Add-on security packages can add to the （75） access control capabilities of the OS.Particular applications.or utilities,such as a database management system,also incorporate access control functions.External devices,such as firewalls,can also provide access control services.

真题详情及解析

【数据库系统工程师201605】【71-75】In the fields of physical security and information security,access control is the selective restriction of access to a place or other resource.The act of accessing may mean consuming,entering,or using.Permission to access a resource is called authorization（授权）.
An access control mechanism （71） between a user（or a process executing on behalf of a user）and system resources,such as applications,operating systems,firewalls;routers,files,and databases.The system must first authenticate（验证）a user seeking access.Typically the authentication function determines whether the user is （72） to access the system at all.
Then the access control function determines if the specific requested access by this user is permitted.A security administrator maintains an authorization database that specifies what type of access to which resources is allowed for this user.The access control function consults this database to determine whether to （73） access.An auditing function monitors and keeps a record of user accesses to system resources.
In practice,a number of （74） may cooperatively share the access control function.All Operating systems have at least a rudimentary（基本的）.and in many cases a quite robust,access control component.Add-on security packages can add to the （75） access control capabilities of the OS.Particular applications.or utilities,such as a database management system,also incorporate access control functions.External devices,such as firewalls,can also provide access control services.

真题详情及解析

【数据库系统工程师201605】【71-75】In the fields of physical security and information security,access control is the selective restriction of access to a place or other resource.The act of accessing may mean consuming,entering,or using.Permission to access a resource is called authorization（授权）.
An access control mechanism （71） between a user（or a process executing on behalf of a user）and system resources,such as applications,operating systems,firewalls;routers,files,and databases.The system must first authenticate（验证）a user seeking access.Typically the authentication function determines whether the user is （72） to access the system at all.
Then the access control function determines if the specific requested access by this user is permitted.A security administrator maintains an authorization database that specifies what type of access to which resources is allowed for this user.The access control function consults this database to determine whether to （73） access.An auditing function monitors and keeps a record of user accesses to system resources.
In practice,a number of （74） may cooperatively share the access control function.All Operating systems have at least a rudimentary（基本的）.and in many cases a quite robust,access control component.Add-on security packages can add to the （75） access control capabilities of the OS.Particular applications.or utilities,such as a database management system,also incorporate access control functions.External devices,such as firewalls,can also provide access control services.

真题详情及解析

【数据库系统工程师201605】【71-75】In the fields of physical security and information security,access control is the selective restriction of access to a place or other resource.The act of accessing may mean consuming,entering,or using.Permission to access a resource is called authorization（授权）.
An access control mechanism （71） between a user（or a process executing on behalf of a user）and system resources,such as applications,operating systems,firewalls;routers,files,and databases.The system must first authenticate（验证）a user seeking access.Typically the authentication function determines whether the user is （72） to access the system at all.
Then the access control function determines if the specific requested access by this user is permitted.A security administrator maintains an authorization database that specifies what type of access to which resources is allowed for this user.The access control function consults this database to determine whether to （73） access.An auditing function monitors and keeps a record of user accesses to system resources.
In practice,a number of （74） may cooperatively share the access control function.All Operating systems have at least a rudimentary（基本的）.and in many cases a quite robust,access control component.Add-on security packages can add to the （75） access control capabilities of the OS.Particular applications.or utilities,such as a database management system,also incorporate access control functions.External devices,such as firewalls,can also provide access control services.

真题详情及解析

【数据库系统工程师201605】【71-75】In the fields of physical security and information security,access control is the selective restriction of access to a place or other resource.The act of accessing may mean consuming,entering,or using.Permission to access a resource is called authorization（授权）.
An access control mechanism （71） between a user（or a process executing on behalf of a user）and system resources,such as applications,operating systems,firewalls;routers,files,and databases.The system must first authenticate（验证）a user seeking access.Typically the authentication function determines whether the user is （72） to access the system at all.
Then the access control function determines if the specific requested access by this user is permitted.A security administrator maintains an authorization database that specifies what type of access to which resources is allowed for this user.The access control function consults this database to determine whether to （73） access.An auditing function monitors and keeps a record of user accesses to system resources.
In practice,a number of （74） may cooperatively share the access control function.All Operating systems have at least a rudimentary（基本的）.and in many cases a quite robust,access control component.Add-on security packages can add to the （75） access control capabilities of the OS.Particular applications.or utilities,such as a database management system,also incorporate access control functions.External devices,such as firewalls,can also provide access control services.

真题详情及解析