全英文面试题（Java软件工程师）.docx

Java软件工程师面试题Circle one or more options which are correct.1. Why would someone want to use JavaScript on a Web page? (5 scores)A. To react to events that occur with Web page useB. To read and write HTML C. To validate data in a Web formD. To pass data to a Java applet programE. To run a clock or timer in a Web page2. Evaluate the following String method uses by writing the value of s after the evaluation (5 scores)(write one value on the line to the right of each evaluation)var str=Mix and MatchA. s = str.indexOf(x) _2B. s = str.indexOf(g) _-1C. s = str.indexOf(M) _0D. s = str.lastIndexOf(a) _9E. s = str.indexOf(and) _43. How can someone properly open a second Web browser window with a JavaScript statement?(5 scores)A. document.openWin(/)B. openWindow(/) C. window.open(“/”)D. document.open(/) E. document.location(/)4. Given the following valid HTML form, how would you assign the value typed into the owner control to a variable ssn in a JavaScript statement?(5 scores) A. ssn = window.SSN.owner.value;B. ssn = document.SSN.owner.value;C. ssn = document.SSN.input.value;D. ssn = document.form.input.value;E. ssn = window.owner.value;5. After a JavaScript function runs the following two lines of code, what value does the variable x contain?(5 scores)arr = new Array(5);x = Math.random() / arr.length;A. a floating point number between 0.0 and 0.2B. a floating point number between 0.0 and 0.25C. a floating point number between 0.0 and 1.0D. a floating point number between 0.0 and 5.0E. x would not be assigned due to one or more errors in the code6. What is the value of variable x after the following block of JavaScript code is run? (5 scores)x=0;y=2;while(y0.5 | y0.0) x = x+1; y = y/x - y;A. 0B. 1C. more than 1D. undetermined since the code divides by zeroE. less than 17. What will happen when you attempt to compile and run this code? (5 scores)abstract class Base abstract public void myfunc(); public void another() System.out.println(Another method); public class Abs extends Base public static void main(String argv) Abs a = new Abs(); a.amethod(); public void myfunc() System.out.println(My Func); public void amethod() myfunc(); A The code will compile and run, printing out the words My FuncB The compiler will complain that the Base class has non abstract methodsC The code will compile but complain at run time that the Base class has non abstract methodsD The compiler will complain that the method myfunc in the base class has no body, nobody at all to looove it8. Which most closely matches a description of a Java Map? (5 scores)A. A vector of arrays for a 2D geographic representationB. A class for containing unique array elementsC. A class for containing unique vector elementsD. An interface that ensures that implementing classes cannot contain duplicate keys9. What will happen when you attempt to compile and run the following code? (5 scores)public class StrEqpublic static void main(String argv) StrEq s = new StrEq(); private StrEq() String s = Marcus; String s2 = new String(Marcus); if(s = s2) System.out.println(we have a match); else System.out.println(Not equal); A. Compile time error caused by private constructorB. Output of we have a matchC. Output of Not equalD. Compile time error by attempting to compare strings using =10. What will happen when you attempt to compile and run the following code? (5 scores)import java.io.*;class Base public void amethod()throws FileNotFoundExceptionpublic class ExcepDemo extends Base public static void main(String argv)ExcepDemo e = new ExcepDemo(); public void amethod() protected ExcepDemo()try DataInputStream din = new DataInputStream(System.in); System.out.println(Pausing); din.readByte(); System.out.println(Continuing); this.amethod();catch(IOException ioe) A. Compile time error caused by protected constructorB. Compile time error caused by amethod not declaring ExceptionC. Runtime error caused by amethod not declaring ExceptionD. Compile and run with output of Pausing and Continuing after a key is hit11. What will happen when you attempt to compile and run this program? (5 scores)public class Outerpublic String name = Outer;public static void main(String argv) Inner i = new Inner(); i.showName(); /End of main private class Inner String name =new String(Inner); void showName() System.out.println(name); /End of Inner classA. Compile and run with output of OuterB. Compile and run with output of InnerC. Compile time error because Inner is declared as privateD. Compile time error because of the line creating the instance of Inner12. What will be output by the following line? (5 scores)System.out.println(Math.floor(-2.1);A. -2B. 2.0C. -3D. -3.013. What will happen when you attempt to compile and run the following code? (5 scores)int Output=10;boolean b1 = false;if(b1=true) & (Output+=10)=20) System.out.println(We are equal +Output); else System.out.println(Not equal! +Output);A. Compile error, attempting to peform binary comparison on logical data typeB. Compilation and output of We are equal 10C. Compilation and output of Not equal! 20D. Compilation and output of Not equal! 1014. Given the following variableschar c = c;int i = 10;double d = 10;long l = 1;String s = Hello;Which of the following will compile without error? (5 scores)A.c=c+i;B.s+=i;C.i+=s;D.c+=s;15. Given the following class definition, which of the following statements would be legal after the comment /Here? (5 scores)class InOutString s= new String(Between); public void amethod(final int iArgs) int iam; class Bicycle public void sayHello() /Here /End of bicycle class /End of amethod public void another() int iOther; A. System.out.println(s);B. System.out.println(iOther);C. System.out.println(iam);D. System.out.println(iArgs);16. Which of the following are methods of the Thread class? (5 scores)A. yield()B. sleep(long msec)C. go()D. stop()17. How would you print a text message to the browser? (5 scores)A.PrintWriter out = response.getWriter(); out.println(message);B.response.println(message);C.ServletOutputStream out = response.getWriter(); out.println(message);D.ServletOutputStream out = response.ServletOutputStream(); out.println(message);18. Which of the following will include the text of a resource at translation time? (5 scores)A.B.C.D.19. What is the correct syntax for assigning a value to a beans property? (5 scores)A.B.C.D.20. How do you get the request header names? (5 scores)A.Enumeration e = request.getHeaderNames ;B.String names = request.getHeaderNames ;C.Enumeration e = request.getHeaders ;D.String names = request.getHeaders ;21. How do you perform programmatic server-side includes? (5 scores)A.setForward(String url)B.RequestDispatcherC.RequestD.getResource(String url)22. What happens if, when calling getParameterValues, the parameter has a single value? (5 scores)A.It returns an error. You should use the getParameterValue method for single value parameters.B.It returns an array with a length of one.C.getParameterValues calls getValue for that single value.D.getParameterValues calls getValue for that single value.23. Read the following code:public void service(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException response.setContentType(text/html); PrintWriter out = response.getWriter(); out.println(); out.println(Servlet Error Handling + Example); out.println(); out.println(A skimpy, but complete servlet.); out.println(); out.println(); Which two statements are true regarding this code (choose two)?(5 scores)A. The doGet, doPost, or doPut method is called next depending on the type of request.B. This code is invalid because it doesnt call one of the doGet, doPost, or doPut methods.C. This code is valid and will handle all three types of HTTP requests including GET, POST, and PUT.D. The next method invoked is destroy.24. You normally write a servlet by overriding the doPut, doGet, and doPost methods. Which class do they come from? (5 scores)A.HttpServletRequestB.HttpServletResponseC.HttpServletD.HttpSession25. Which interface defines the methods for retrieving form parameters? (5 scores)A.ServletRequestB.ServletResponseC.HTTPRequestD.HTTPResponse26. Given the following deployment descriptor code: test TestServlet color green Which methods can be used to access a servlet initialization parameter color? (5 scores)A.Servlet.getInitParameter()B.HttpServletRequest.getParameter()C.ServletContext.getInitParameter()D.ServletConfig.getInitParame