JAVA认证历年真题：310-025精选题（51）

会计考友 · 发表于 2012-8-4 12:33:16

310-025精选题（51）的具体内容如下：
229. Consider the following code: What will be printed?
public class StringTest{
public static void main(String[] args){
String s = "Kalle och Matte";
int i = s.length();
int j = args.length;
System.out.println(i + " " + j);
}}
A. 13 13
B. 13 0
C. 15 0
D. 15 13
E. 15 null
F. 15 + + 0
G. 13 + + 0
C.
230. Check and run this code and you will see how the round method in the Java.lang.Math class will behave when you have -4.5 and 4.5 . It will round up. You will alse see how substring();floor();and ceil();behave.
import java.lang.Math;
public class Substr{
public static void main(String[]args){
String s1 = ("Kalle Bengtsson");
String s2 = s1.substring(0,5);
System.out.println(s2);
s1 = ("phenobarbital（");
s2 = s1.substring(3,5);
System.out.println(s2);
long i = Math.round(-4.4);
System.out.println("Math.round(-4.4) = " + i);
long j = Math.round(4.5);
System.out.println("Math.round(4.5) = " + j);
long k = Math.round(-4.5);
System.out.println("Math.round(-4.5) = " + k);
int l = (int)(Math.ceil(-4.4));
System.out.println("Math.ceil(-4.4) = " + l);
int m = (int)Math.ceil(-4.5);
System.out.println("Math.ceil(-4.5) = " + m);
int n = (int)Math.ceil(4.4);
System.out.println("Math.ceil(4.4) = " + n);
int o = (int)Math.floor(-4.4);
System.out.println("Math.floor(-4.4) = " + o);
int p = (int)Math.floor(4.4);
System.out.println("Math.floor(4.4) = " + p);
int q = (int)Math.floor(4.5);
System.out.println("Math.floor(4.5) = " + q);
}
}

会计考友 · 发表于 2012-8-4 12:33:17

231. Consider the following code: What will be printed?
public class Testa{
Integer a = 10;
Integer b = 20;
Integer c = 10;
public static void main (String[] args){
if (a==c){
System.out.println("Fel");
}
if (a.equals(c)){
System.out.println("rätt");
}
}
}
A. Fel rätt
B. rätt
C. Fel
D. None will be printed. A NullPointerException will be thrown.
E. None will be printed. Compilation error. Incompatible types and a non-static variable cannot be referenced from a static context.
E. (check)
232. Consider the following code: What （）will be printed?
public class Testb {
static Integer a = 10;
static Integer b = 20;
static Integer c = 10;
public static void main (String[] args){
if (a==c){
System.out.println("Fel");
}
if (a.equals(c)){
System.out.println("rätt");
}
}
}
A. Fel rätt
B. rätt
C. Fel
D. None will be printed. A NullPointerException will be thrown.
E. None will be printed. Compilation error. Incompatible types and a non-static variable cannot be referenced from a static context.
F. None will be printed. Compilation error. Incompatible types.
F.

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[考试试题] JAVA认证历年真题：310-025精选题（51）

JAVA认证历年真题：310-025精选题（51）

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