Given 11.public interface Status { 12./* insert code here */ int MY_VALUE = 10； 13.} Which three are valid on line 12？（）

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• 11. public static void main（String[] args） {  12. Object obj = new Object（） {  13. public int hashCode（） {  14. returns 42； 15. }  16. }；  17. System.out.println（obj.hashCode（））；  18. }    What is the result？ （） 

  A .  42 B .  An exception is thrown at runtime. C .  Compilation fails because of an error on line 12. D .  Compilation fails because of an error on line 16. E .  Compilation fails because of an error on line 17.

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• Given a bridge link 6 miles （9.7 km） long，which parameter on the Root Radio Interface page must be configured in order for IP traffic to pass？（）

  A . RTS B . distance（kilometers） C . concatenation D . CCA

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• Given:10. interface Data { public void load(); }11. abstract class Info { public abstract void load(); }Which class correctly uses the Data interface and Info class?（）（）

  A .https://assets.asklib.com/images/image2/2018080210481836686.jpg B .https://assets.asklib.com/images/image2/2018080210482719010.jpg C .https://assets.asklib.com/images/image2/2018080210483486806.jpg D .https://assets.asklib.com/images/image2/2018080210483925433.jpg E .https://assets.asklib.com/images/image2/2018080210484613654.jpg F .https://assets.asklib.com/images/image2/2018080210485087701.jpg

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• Which of the following commands would be applied to a WAN interface, but not on LAN Interface?（）

  A . IP address B . encapsulation PPP C . no shutdown D . PPP authentication CHAP E . Speed F . None of the above

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• 10. public class ClassA {  11. public void count（int i） {  12. count（++i）；  13. }  14. }  And：  20. ClassA a = new ClassA（）；  21. a.count（3）；  Which exception or error should be thrown by the virtual machine？（） 

  A .  StackOverflowError B .  NullPointerException C .  NumberFormatException D .  IllegalArgumentException E .  ExceptionlnlnitializerError

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• Given：   11. public static void main（String[] args） {   12. Object obj = new int[] { 1， 2， 3 }；   13. int[] someArray = （int[]）obj；   14. for （int i ： someArray） System.out.print（i + " "）；   15. }   What is the result？ （）

  A .  Compilation fails because of an error in line 13. B .  A ClassCastException is thrown at runtime. C .  1 2 3 D .  Compilation fails because of an error in line 14. E .  Compilation fails because of an error in line 12.

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• Refer to the exhibit. Given the interface configuration on a DSL connection with PPPoE, select the true statement.（）https://assets.asklib.com/images/image2/201808011449257464.jpg

  A . The router is limiting the size of TCP and UDP packets.  B . The configuration implements an effective Layer-2 fragmentation technique. C . The value of 542 is recommended in several RFCs.  D . There is another upstream router terminating the PPPoE session.

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• 11. public static void main（String[] args） {  12. Integer i = uew Integer（1） + new Integer（2）；  13. switch（i） {  14. case 3： System.out.println（”three”）； break；  15. default： System.out.println（”other”）； break；  16. }  17. }  What is the result？（） 

  A .  three B .  other C .  An exception is thrown at runtime. D .  Compilation fails because of an error on line 12. E .  Compilation fails because of an error on line 13. F .  Compilation fails because of an error on line 15.

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• 11. public void addStrings（List list） {  12. list.add（”foo”）；  13. list.add（”bar”）；  14. }  What must you change in this method to compile without warnings？（） 

  A .  add this code after line 11： list = （List

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• 11. public void someMethod（Object value） {  12. // check for null value ....  20. System.out.println（value.getClass（））；  21. }  What， inserted at line 12， is the appropriate way to handle a null value？（） 

  A .  assert value == null； B .  assert value !null， “value is null”； C .  if （value == null） { throw new AssertionException（”value is null”）； D .  if （value == null） { throw new IllegalArgumentException（”value is null”）；

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• Given： 10.interface Data { public void load（）； } 11.abstract class Info { public abstract void load（）； }  Which class correctly uses the Data interface and Info class？（）

  A .https://assets.asklib.com/images/image2/2018080114295971472.png B .https://assets.asklib.com/images/image2/2018080114300659438.png C .https://assets.asklib.com/images/image2/2018080114301390095.png D .https://assets.asklib.com/images/image2/2018080114301865887.png

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• 11. public class Test {  12. public void foo（） {  13. assert false；  14. assert false；  15. }  16. public void bar（）{  17. while（true）{  18. assert false；  19. }  20. assert false；  21. }  22. }  What causes compilation to fail？（）  

  A .  Line 13 B .  Line 14 C .  Line 18 D .  Line 20

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• Given: 11. public void go(int x) { https://assets.asklib.com/images/image2/2018080117015876420.jpg Which statement is true?（）

  A . All of the assert statements are used appropriately. B . Only the assert statement on line 12 is used appropriately. C . Only the assert statement on line 15 is used appropriately. D . Only the assert statement on line 18 is used appropriately. E . Only the assert statements on lines 12 and 15 are used appropriately. F . Only the assert statements on lines 12 and 18 are used appropriately. G . Only the assert statements on lines 15 and 18 are used appropriately.

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• 11. public static void append（List list） { list.add（”0042”）； }  12. public static void main（String[] args） {  13. List intList = new ArrayList（）；  14. append（intList）；  15. System.out.println（intList.get（0））；  16. }  What is the result？（） 

  A .  42 B .  0042 C .  An exception is thrown at runtime. D .  Compilation fails because of an error in line 13. E .  Compilation fails because of an error in line 14.

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• Refer to the exhibit. The show port-security interface fa0/1 command was issued on switch SW1.  Given the output that was generated， which two security statement are true？ （） https://assets.asklib.com/images/image2/2018073011082032151.jpg

  A .  Interface FastEthernet 0/1 was configured with the switchport port-security aging command.   B .  Interface FastEthernet 0/1 was configured with the switchport port-security protect command.   C .  Interface FastEthernet 0/1 was configured with the switchport port-security violation restrict  command. D .  When the number of secure IP addresses reaches 10， the interface will immediately shut down.  E .  When the number of secure MAC addresses reaches 10， the interface will immediately shut  down and an SNMP trap notification will be sent.

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• Given a bridge link 6 miles （9.7 km） long，which parameter on the root radio interface page must be configured in order for ip traffic to pass？（）

  A . rts B . distance（kilometers） C . concatenation D . cca

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• 11.public static void main（String[]args）{ 12.Object obj=new int[]{1，2，3}； 13.int[] someArray=（int[]）obj； 14.for（inti：someArray）System.out.print（i+""） 15.} What is the result？（）

  A . 123 B . Compilation fails because of an error in line 12. C . Compilation fails because of an error in line 13. D . Compilation fails because of an error in line 14. E . A ClassCastException is thrown at runtime.

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• 11. public static void main（String[] args） {  12. Object obj =new int[] { 1，2，3 }；  13. int[] someArray = （int[]）obj；  14. for （int i： someArray） System.out.print（i +“ “）  15. }  What is the result？ （）

  A .  1 2 3 B .  Compilation fails because of an error in line 12. C .  Compilation fails because of an error in line 13. D .  Compilation fails because of an error in line 14. E .  A ClassCastException is thrown at runtime.

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• 10. class Nav{  11. public enum Direction { NORTH， SOUTH， EAST， WEST }  12. }  13. public class Sprite{  14. // insert code here  15. }  Which code， inserted at line 14， allows the Sprite class to compile？（） 

  A .  Direction d = NORTH； B .  Nav.Direction d = NORTH； C .  Direction d = Direction.NORTH； D .  Nav.Direction d = Nav.Direction.NORTH；

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• 10. class Line {  11. public static class Point { }  12. }  13.  14. class Triangle {  15. // insert code here  16. }  Which code， inserted at line 15， creates an instance of the Point class defined in Line？（） 

  A .  Point p = new Point（）； B .  Line.Point p = new Line.Point（）； C .  The Point class cannot be instatiated at line 15. D .  Line 1 = new Line（） ； 1.Point p = new 1.Point（）；

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• Given：  1.  public interface Foo {  2.  int k = 4：  3.  }   Which three are equivalent to line 2？（）

  A .  final int k = 4： B .  public int k = 4： C .  static int k = 4： D .  private int k = 4： E .  abstract int k = 4： F .  volatile int k = 4： G .  transient int k = 4： H .  protected int k = 4：

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• Refer to the exhibit. Given this DSL router's sub-interface configuration, select the two true statements. Assume the interface is UP/UP.（）https://assets.asklib.com/images/image2/2018080114323148406.jpg

  A . The interface must be configured as point-to-multipoint B . The sustained cell rate and the burst rate are equal C . The router's configuration will also include a Dialer interface D . The configuration must also include a sub-interface with a VPI/VCI of 8/35

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• 11. public interface Status {  12. /* insert code here */ int MY_VALUE = 10；  13. }  Which three are valid on line 12？（）

  A .  final B .  static C .  native D .  public E .  private F .  abstract G .  protected

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• Refer to the exhibit. For the given configuration, on packets leaving the router on interface FastEthernet0/0 that matches the high traffic class, what will the MPLS experimental bit be set to？（）

  <img src='https://img2.soutiyun.com/ask/uploadfile/2019-03-27/54c4736819a81433c4cc933dbe7c4cb7.jpg' /> A. 0 B. 1 C. 2 D. 3 E. 4 F. 5

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