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单选题
关于SNMP v1描述正确的是()。
A
许多网络管理员使用缺省的“public”作community name。任何黑客都会首先尝试用“public”来访问SNMP
B
使用强的认证机制
C
用密文发送community name,不易于被sniffer捕获
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public class Employee{ private String name; public Employee(String name){ this.name = name; } public String getName(){ return name; } } public class Manager extends Employee{ public Manager(String name){ System.out.println(getName()); } } 执行语句new Manager(“smith”)后程序的输出是哪项?() A、 smithB、 nullC、 编译错误D、 name
考题
关于SNMP v1描述正确的是()。A、许多网络管理员使用缺省的“public”作community name。任何黑客都会首先尝试用“public”来访问SNMPB、使用强的认证机制C、用密文发送community name,不易于被sniffer捕获
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单选题public class Pet{ private String name; public Pet(){ System.out.print(1); } public Pet(String name){ System.out.print(2); } } public class Dog extends Pet{ public Dog(){ System.out.print(4); } public Dog(String name){ super(name); System.out.print(3); } } 执行new Dog(“棕熊”);后程序输出是哪项?()A
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单选题public class Employee{ private String name; public Employee(String name){ this.name = name; } public void display(){ System.out.print(name); } } public class Manager extends Employee{ private String department; public Manager(String name,String department){ super(name); this.department = department; } public void display(){ System.out.println(super.display()+”,”+department); } } 执行语句new Manager(“smith”,”SALES”)后程序的输出是哪项?()A
smith,SALESB
null,SALESC
smith,nullD
null,nullE
编译错误
考题
单选题public class Employee{ private String name; public Employee(String name){ this.name = name; } public String getName(){ return name; } } public class Manager extends Employee{ private String department; public Manager(String name,String department){ this.department = department; super(name); System.out.println(getName()); } } 执行语句new Manager(“smith”,”SALES”)后程序的输出是哪项?()A
smithB
nullC
SALESD
编译错误
考题
单选题将路由器设为代理,设置只读的共同体名为public,则正确的命令为()。A
snmp-server community public rwB
snmp-server community public roC
snmp-server host 192.168.1.100 publicD
snmp-server view public tcp included
考题
单选题public class Plant { private String name; public Plant(String name) { this.name = name; } public String getName() { return name; } } public class Tree extends Plant { public void growFruit() { } public void dropLeaves() { } } Which is true?()A
The code will compile without changes.B
The code will compile if public Tree() { Plant(); } is added to the Tree class.C
The code will compile if public Plant() { Tree(); } is added to the Plant class.D
The code will compile if public Plant() { this(”fern”); } is added to the Plant class.E
The code will compile if public Plant() { Plant(”fern”); } is added to the Plant class.
考题
单选题public class Employee{ private String name; public Employee(String name){ this.name = name; } public String getName(){ return name; } } public class Manager extends Employee{ public Manager(String name){ System.out.println(getName()); } } 执行语句new Manager(“smith”)后程序的输出是哪项?()A
smithB
nullC
编译错误D
name
考题
单选题在Cisco路由器上进行SNMP设置时,如果团体名为manage,访问权限为只读,那么正确的配置语句是( )。A
snmp-server community public roB
snmp-server community public rwC
snmp-server community manage roD
snmp-server community manage rw
考题
单选题public class Pet{ private String name; public Pet(String name){ this.name = name; } public void speak(){ System.out.print(name); } } public class Dog extends Pet{ public Dog(String name){ super(name); } public void speak(){ super.speak(); System.out.print(“ Dog ”); } } 执行代码 Pet pet = new Dog(“京巴”); pet.speak(); 后输出的内容是哪项?()A
京巴B
京巴 DogC
nullD
Dog京巴
考题
单选题执行以下代码后,下面哪些描述是正确的() public class Student{ private String name = “Jema”; public void setName(String name){ this.name = name; } public String getName(){ return this.name; } public static void main(String[] args){ Student s; System.out.println(s.getName()); } }A
输出nullB
第10行编译报错C
第11行编译报错D
输出Jema
考题
单选题关于SNMP v1描述正确的是()。A
许多网络管理员使用缺省的“public”作community name。任何黑客都会首先尝试用“public”来访问SNMPB
使用强的认证机制C
用密文发送community name,不易于被sniffer捕获
考题
单选题public class Employee{ private String name; public Employee(String name){ this.name = name; } public String getName(){ return name; } } public class Manager extends Employee{ private String department; public Manager(String name,String department){ this.department = department; super(name); (应于上一行掉位置) System.out.println(getName()); } } Super的位置是否在方法的首行 执行语句new Manager(“smith”,”SALES”)后程序的输出是哪项?()A
smithB
nullC
SALESD
编译错误
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