Oracle认证考试

Given: String[] elements = { "for", "tea", "too" }; String first = (elements.length > 0) ? elements[0] : null; What is the result?()A、Compilation fails.B、An exception is thrown at runtime.C、The variable first is set to null.D、The variable first is set to

题目

Given: String[] elements = { "for", "tea", "too" }; String first = (elements.length > 0) ? elements[0] : null; What is the result?()

  • A、Compilation fails.
  • B、An exception is thrown at runtime.
  • C、The variable first is set to null.
  • D、The variable first is set to elements[0].
参考答案和解析
正确答案:D
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相似问题和答案

第1题:

Given:11.Stringtest="Thisisatest";12.String[]tokens=test.split("\s");13.System.out.println(tokens.length);Whatistheresult?()

A.Anexceptionisthrownatruntime.

B.1

C.4

D.Compilationfails.

E.0


参考答案:D

第2题:

Given:String[]elements={"for","tea","too"};Stringfirst=(elements.length>0)?elements[0]:null;Whatistheresult?()

A.Compilationfails.

B.Anexceptionisthrownatruntime.

C.Thevariablefirstissettonull.

D.Thevariablefirstissettoelements[0].


参考答案:D

第3题:

publicclassTest{publicstaticvoidmain(String[]args){booleanassert=true;if(assert){System.out.println(”assertistrue”);}}}Given:javac-source1.3Test.javaWhatistheresult?()

A.Compilationfails.

B.Compilationsucceedswitherrors.

C.Compilationsucceedswithwarnings.

D.Compilationsucceedswithoutwarningsorerrors.


参考答案:C

第4题:

Given an HttpServletRequest request: 22.String id = request.getParameter("jsessionid"); 23.// insert code here 24.String name = (String) session.getAttribute("name"); Which three can be placed at line 23 to retrieve anexisting HttpSession object?()

  • A、HttpSession session = request.getSession();
  • B、HttpSession session = request.getSession(id);
  • C、HttpSession session = request.getSession(true);
  • D、HttpSession session = request.getSession(false);
  • E、HttpSession session = request.getSession("jsessionid");

正确答案:A,C,D

第5题:

Given:   11. String test = "This is a test";   12. String[] tokens = test.split("/s");   13. System.out.println(tokens.length);   What is the result?()

  • A、 An exception is thrown at runtime.
  • B、 1
  • C、 4
  • D、 Compilation fails.
  • E、 0

正确答案:D

第6题:

Given:11.Stringtest="Thisisatest";12.String[]tokens=test.split("\s");13.System.out.println(tokens.length);Whatistheresult?()

A.0

B.1

C.4

D.Compilationfails.


参考答案:D

第7题:

Given:Andthefollowingfivefragments:publicstaticvoidmain(String...a){publicstaticvoidmain(String.*a){publicstaticvoidmain(String...a){publicstaticvoidmain(String[]...a){publicstaticvoidmain(String...[]a){Howmanyofthecodefragments,insertedindependentlyatline2,compile?()

A.0

B.1

C.2

D.3

E.4


参考答案:D

第8题:

Given:Which regular expression, inserted at line 12, correctly splits test into "Test A", "Test B", and "Test C"?()

A.String regex="";

B.String regex=" .";

C.String regex=".*";

D.String regex="\\s";

E.String regex="\\.\\s*";

F.String regex="\\w[\.]+";


参考答案:E

第9题:

Given: 11.String test = "a1b2c3"; 12.String[] tokens = test.split("//d"); 13.for(String s: tokens) System.out.print(s + " "); What is the result?()

  • A、a b c
  • B、1 2 3
  • C、a1b2c3
  • D、a1 b2 c3

正确答案:A

第10题:

Given:  310-025   Leading the way in IT testing and certification tools, www.testking.com   - 48 -   public class foo {   static String s;   public static void main (Stringargs) {   system.out.printIn (“s=” + s);   }   }   What is the result?()

  • A、 The code compiles and “s=” is printed.
  • B、 The code compiles and “s=null” is printed.
  • C、 The code does not compile because string s is not initialized.
  • D、 The code does not compile because string s cannot be referenced.
  • E、 The code compiles, but a NullPointerException is thrown when toString is called.

正确答案:B

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