It prints f2[0] = 0.0.
It prints f2[0] = NaN.
An error at line 5 causes compile to fail.
An error at line 6 causes compile to fail.
An error at line 6 causes an expectation at runtime.
第1题:
以下程序的输出结果是( )。 include<stdio.h> void main() {int f,f1,f2,i; f1=0;f2=1; printf("%d%d",f1,f2); for(i=3;i<=5;i++) {f=-f1+f2,printf("%d",f); f2=f1;f1=f; } printf("\n"); }
第2题:
public class ArrayTest { public static void main(String[] args) { float fl[], f2[]; fl = new float[10]; f2 = f1; System.out.println(“f2[0]= “ + f2[0]); } } What is the result?()
第3题:
class Super { public int i = 0; public Super(String text) { i = 1; } } public class Sub extends Super { public Sub(String text) { i = 2; } public static void main(String args[]) { Sub sub = new Sub(“Hello”); System.out.println(sub.i); } } What is the result?()
第4题:
public class X { public static void main (Stringargs) { int a = new int [1] modify(a); System.out.printIn(a[0]); } public static void modify (int a) { a[0] ++; } } What is the result?()
第5题:
public class X { public static void main (String[]args) { string s = new string (“Hello”); modify(s); System.out.printIn(s); } public static void modify (String s) { s += “world!”; } } What is the result?()
第6题:
public class Test { public static void replaceJ(string text) { text.replace (‘j’, ‘l’); } public static void main(String args[]) { string text = new String (“java”) replaceJ(text); system.out.printIn(text); } } What is the result?()
第7题:
public class test { public static void add3 (Integer i){ int val = i.intValue ( ); val += 3; i = new Integer (val); } public static void main (String args [ ] ) { Integer i = new Integer (0); add3 (i); system.out.printIn (i.intValue ( ) ); } } What is the result?()
第8题:
f[0] = 0
f[0] = 0.0
Compilation fails.
An exception is thrown at runtime.
第9题:
It prints f2[0] = 0.0.
It prints f2[0] = NaN.
An error at line 5 causes compile to fail.
An error at line 6 causes compile to fail.
An error at line 6 causes an expectation at runtime.
第10题:
It prints f2[0] = 0.0
It prints f2[0] = NaN
An error at line 5 causes compile to fail.
An error at line 6 causes compile to fail.
An error at line 6 causes an exception at runtime.
第11题:
The program prints “0”
The program prints “4”
The program prints “8”
The program prints “12”
The code does not complete.
第12题:
The program runs and prints “0”
The program runs and prints “1”
The program runs but aborts with an exception.
An error “possible undefined variable” at line 4 causes compilation to fail.
An error “possible undefined variable” at line 9 causes compilation to fail.
第13题:
public class ArrayTest { public static void main (Stringargs) { float f1, f2; f1 = new float [10]; f2 = f1; System.out.printIn (“f2[0]=” + f2[0]); } } What is the result?()
第14题:
1. public class X { 2. public static void main (String[]args) { 3. int [] a = new int [1] 4. modify(a); 5. System.out.printIn(a[0]); 6. } 7. 8. public static void modify (int[] a) { 9. a[0] ++; 10. } 11. } What is the result?()
第15题:
public class Test { private static float[] f = new float[2]; public static void main(String args[]) { System.out.println(“f[0] = “ + f[0]); } } What is the result?()
第16题:
public class ForBar { public static void main(String args) { int i = 0, j = 5; tp: for (;;) { i ++; for(;;) if(i > --j) break tp; } system.out.printIn(“i = ” + i + “, j = “+ j); } } What is the result? ()
第17题:
public class test ( private static int j = 0; private static boolean methodB(int k) ( j += k; return true; ) public static void methodA(int i)( boolean b: b = i < 10 | methodB (4); b = i < 10 || methodB (8); ) public static void main (String args[])( methodA (0); system.out.printIn(j); ) ) What is the result?()
第18题:
1. public class ArrayTest { 2. public static void main (String[]args) { 3. float f1[], f2[]; 4. f1 = new float [10]; 5. f2 = f1; 6. System.out.printIn (“f2[0]=” + f2[0]); 7. } 8. } What is the result?()
第19题:
The program runs and prints “0”
The program runs and prints “1”
The program runs but aborts with an exception.
An error “possible undefined variable” at line 4 causes compilation to fail.
An error “possible undefined variable” at line 9 causes compilation to fail.
第20题:
The program runs and prints “i=1, j=0”
The program runs and prints “i=1, j=4”
The program runs and prints “i=3, j=4”
The program runs and prints “i=3, j=0”
An error at line 4 causes compilation to fail.
An error at line 7 causes compilation to fail.
第21题:
0
1
2
Compilation fails.
第22题:
Compilation will fail.
The program prints “0”.
The program prints “3”.
Compilation will succeed but an exception will be thrown at line 3.
第23题:
It prints f2[0] = 0.0
It prints f2[0] = NaN
An error at line 5 causes compile to fail.
An error at line 6 causes compile to fail.
An error at line 6 causes an exception at runtime.
第24题:
The program prints “lava”
The program prints “java”
An error at line 7 causes compilation to fail.
Compilation succeeds but the program throws an exception.