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发布时间:2023-11-02 01:09:58

[单项选择]For an enterprise to use one of the reserved private IP address ranges, as best practice they shouldcoordinate with:()
A. their legal department
B. IANA
C. IEEE
D. their IT department

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[单项选择]A reserved person is one who()speaks a little and()gets excited.
A. always...sometimes
B. often...never
C. never...sometimes
D. always...seldom
[单项选择]The use of one name for that of another associated with it is rhetorically called ______.
A. synecdoche
B. metonymy
C. substitution
D. metaphor
[单项选择]Having two eyes instead of one is particularly useful for ______ .
A. seeing at night
B. seeing objects far away
C. looking over a wide area
D. judging distances
[单项选择]One use of networks is to let several computers share()such as file systems,printers, and tape drives.
A. CPU
B. memory
C. resources
D. data
[单项选择]One of your customers wishes to use the NAS to perform DHCP functions and does not currently have a Layer 3 gateway in its production network. Which gateway mode is appropriate for this customer?()
A. Virtual Gateway
B. Real-IP Gateway
C. NAT Gateway
D. IP-IP Gateway
[单项选择]No one can use cell phones in any areas at the hospital where equipment might be affected by the interference from cell phones.
A. 在医院的任何区域都不得使用手机,因为会受到设备的干扰。
B. 在医院的任何区域,手机会影响设备的使用,任何人都不得使用。
C. 医院里没有人使用手机,因此不会影响设备的使用。
D. 医院内,在可能干扰设备使用的任何区域,禁止使用手机。
[单项选择]执行以下Command1的Click事件过程在窗体上显示 Option Base 1 Private Sub Command1 Click( ) Dim a a= Array("a", "b", "C", "d", "e", "f", "g") Print a(1); a(3); a(5) End Sub
A. ab;
B. bdf
C. ace
D. 出错
[单项选择] public class MyLogger {  private StringBuilder logger = new StringBuuilder();  public void log(String message, String user) {  logger.append(message);  logger.append(user);  }  }  The programmer must guarantee that a single MyLogger object works properly for a multi-threaded system. How must this code be changed to be thread-safe?() 
A.  synchronize the log method
B.  replace StringBuilder with StringBuffer
C.  No change is necessary, the current MyLogger code is already thread-safe.
D.  replace StringBuilder with just a String object and use the string concatenation (+=) within the log method
[多项选择] public class TestDemo{   private int x = 2;   static int y = 3;   public void method(){   final int i=100;   int j = 10;   class Cinner{   public void mymethod(){  //Here  }  }  }  }   在Here处可以访问的变量是哪些?()
A. x
B. y
C. i
D. j
[单项选择] public class SyncTest (  private int x;  private int y;  private synchronized void setX (int i) (x=1;)  private synchronized void setY (int i) (y=1;)  public void setXY(int 1)(set X(i); setY(i);)  public synchronized Boolean check() (return x !=y;)  )  Under which conditions will check () return true when called from a different class?   
A.  Check() can never return true.
B.  Check() can return true when setXY is called by multiple threads.
C.  Check() can return true when multiple threads call setX and setY separately.
D.  Check() can only return true if SyncTest is changed to allow x and y to be setseparately.
[单项选择] 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.  smith
B.  null
C.  SALES
D.  编译错误
[单项选择] public class ItemTest {  private final mt id;  public ItemTest(int id) { this.id = id; }  public void updateId(int newId) { id = newId; }  public static void main(String[] args) {  ItemTest fa = new ItemTest(42);  fa.updateId(69);  System.out.println(fa.id);  }  }  What is the result?() 
A.  Compilation fails.
B.  An exception is thrown at runtime.
C.  The attribute id in the Item object remains unchanged.
D.  The attribute id in the Item object is modified to the new value.
E.  A new Item object is created with the preferred value in the id attribute.
[多项选择] public class TestFive {  private int x;  public void foo() {  int current = x;  x = current + 1;  }  public void go() {  for(int i=0;i<5;i++) {  new Thread() {  public void run() {  foo();  System.out.print(x + “, “);  } }.start();  }}}  Which two changes, taken together, would guarantee the output: 1, 2, 3, 4, 5, ?()
A.  Move the line 12 print statement into the foo() method.
B.  Change line 7 to public synchronized void go() {.
C.  Change the variable declaration on line 3 to private volatile int x;.
D.  Wrap the code inside the foo() method with a synchronized( this ) block.
E.  Wrap the for loop code inside the go() method with a synchronized block synchronized(this) { // for loop code here }.

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