Place the correct Code in the Code Sample to achieve the expected results.
Expected results:
Output :1 2 4 8 16 32
Code Sample
int[] y = {1,2,4,8,16,32}; System.out.print("Output:"); [place here] System.out.print(x); System.out.print(""); }
Code
[for(int x:y){] [for(int x=y[]){] [foreach(y as x){] [foreach(int x:y){] [for(int x=1;x=y[];x++)]
Answer:
int[] y = {1,2,4,8,16,32}; System.out.print("Output:"); for(int x:y){ System.out.print(x); System.out.print(""); }
8 public class Test{9 public static void main(String[] a){10 assert a.length == 1;11 }12 }
Which two will produce an AssertionError?(choose two)
A java test
B java -ea test
C java test file1
D java -ea test file1
E java -ea test file1 file2
F java -ea:test test file1
[color=red]
Answer : B E[/color]
84 try{85 ResourceConnection con = resourceFactory.getConnection();86 Results r = con.query("GET INFO FROM CUSTOMER");87 info = r.getData();88 con.close();89 }catch(ResourceException re){90 errorLog.write(re.getMessage());91 }92 return info;
Which statement is true if a ResouceException is thrown on line 86?
A Line 92 will not execute
B The connection will not be retrieved in line 85
C The resource connection will not be closed on line 88
D The enclosing method will thrown an exception to its caller
[color=red]Answer : C[/color]
Assuming that the serializeBanana() and the deserializeBanana() methods will correctly use Java serialization and given:
13 import java.io.*;14 class Food implements Serializable{int good = 3;}15 class Fruit extends Food{int juice = 5;}16 public class Banana extends Fruit{17 int yellow = 4;18 public static void main(String[] args){19 Banana b = new Banana();20 b.serializeBanana(b);21 b2 = b.deserializeBanana();22 System.out.println("restore" + b2.yellow + b2.juice + b2.good);23 }24 //more Banana methods go here25
What is the result?
A restore 400
B restore 403
C restore 453
D Compilation fails
E An exception is thrown at runtime
[color=red]Answer : C[/color]
Given :
12 System.out.format("Pi is approximately %d", Math.PI);
What is the result?
A Compilation fails
B Pi is approximately 3.
C Pi is approximately 3.141593
D An exception is thrown at runtime
[color=red]Answer : D[/color]
11 public class Yikes{1213 public static void go(Long n){System.out.println("Long ");}14 public static void go(Short n){System.out.println("Short ");}15 public static void go(int n){System.out.println("int ");}16 public static void main(String[] args){17 short y = 6;18 long z = 7;19 go(y);20 go(z);21 }22 }
What is the result?
A int Long
B Short Long
C Compilation fails
D An exception is thrown at runtime
[color=red]Answer : A[/color]
Given this method in a class:
21 public String toString(){22 StringBuffer buffer = new StringBuffer();23 buffer.append('<');24 buffer.append(this.name);25 buffer.append('>');26 return buffer.toString();27 }
Which statement is true?
A This code is NOT thread-safe
B The programmer can replace StringBuffer with StringBuilder with no other changes
C This code will perform poorly.For better performance,the code should be rewritten:return "<" + this.name + ">";
D This code will perform well and converting the code to use StringBuffer will not enchange the performance
[color=red]
Answer: B[/color]
Given :
33 Date d = new Date(0);34 String ds = "December 15, 2004";35 // insert code here36 try{37 d = df.parse(ds);38 }39 catch(ParseException e){40 System.out.println("Unable to parse " + ds);41 }42 // insert code here too
What creates the approprivate DateFormat object and adds a day to the Date object?
A 35.DateFormat df = DateFormat.getDateFormat();
42.d.setTime((60*60*24) + d.getTime());
B 35.DateFormat df = DateFormat.getDateInstance();
42.d.setTime((1000*60*60*24) + d.getTime());
C 35.DateFormat df = DateFormat.getDateFormat();
42.d.setLocalTime((1000*60*60*24) + d.getLocalTime());
D 35.DateFormat df = DateFormat.getDateInstance();
42.d.setLocalTime((60*60*24) + d.getLocalTime());
[color=red]Answer: B
[/color]
Given :
12 NumberFormat nf = NumberFormat.getInstance();13 nf.setMaxinumFractionDigits(4);14 nf.setMininumFractionDigits(2);15 String a = nf.format(3.1415926);16 String b = nf.format(2);
Which two statements are true about the result if the locale is Locale.US?(Choose two)
A The value of b is 2
B The value of a is 3.14
C The value of b is 2.00
D The value of a is 3.141
E The value of a is 3.1415
F The value of a is 3.1416
G The value of b is 2.0000.
[color=red]Answer: C F[/color]
1 import java.util.*;2 public class Old{3 public static Object get0(List list){4 return list.get(0);5 }6 }
Which three will compile successfully?(Choose three)
A Object o = Old.get0(new LinkedList());
B Object o = Old.get0(new LinkedList<?>());
C String s = Old.get0(new LinkedList<String>());
D Object o = Old.get0(new LinkedList<Object>());
E String s = (String)Old.get0(new LinkedList<String>());
F
[color=red]Answer: A D E[/color]
相关资源：《Java国际认证（SCJP）典型试题1000例中文版》PDF
