SCJP考试题310-025(第二套<4>)92-147/147

310-025
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QUESTION NO: 92
Given:
1. String foo = “blue”;
2. Boolean[]bar = new Boolean [1];
3. if (bar[0]) {
4. foo = “green”;
5. }
What is the result?
A. Foo has the value of “”
B. Foo has the value of null.
C. Foo has the value of “blue”
D. Foo has the value of “green”
E. An exception is thrown.
F. The code will not compile.
Answer: F
QUESTION NO: 93
Exhibit:
1. public class X {
2. public static void main (String[]args) {
3. String s1 = new String (“true”);
4. Boolean b1 = new Boolean (true);
5. if (s2.equals(b1)) {
6. System.out.printIn(“Equal”);
7. }
8. }
9. }
What is the result?
A. The program runs and prints nothing.
B. The program runs and prints “Equal”
C. An error at line 5 causes compilation to fail.
D. The program runs but aborts with an exception.
Answer: A
QUESTION NO: 94
Given:
1. public class Foo {
2. public static void main (String []args) {
3. int i = 1;
4. int j = i++;
5. if ((i>++j) && (i++ ==j)) {
6. i +=j;
7. }
8. }
9. }
What is the final value of i?
A. 1
B. 2
C. 3
D. 4
E. 5
Answer: B
QUESTION NO: 95
Exhibit:
1. public class X {
2. public static void main (String[]args) {
3. string s = new string (“Hello”);
4. modify(s);
5. System.out.printIn(s);
6. }
7.
8. public static void modify (String s) {
9. s += “world!”;
10. }
11. }
What is the result?
E. The program runs and prints “Hello”
F. An error causes compilation to fail.
G. The program runs and prints “Hello world!”
H. The program runs but aborts with an exception.
Answer: A

QUESTION NO: 96
Which two are equivalent? (Choose Two)
A. 16>4
B. 16/2
C. 16*4
D. 16>>2
E. 16/2^2
F. 16>>>2
Answer: D, F
QUESTION NO: 97
Exhibit:
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?
A. The program runs and prints “0”
B. The program runs and prints “1”
C. The program runs but aborts with an exception.
D. An error “possible undefined variable” at line 4 causes compilation to fail.
E. An error “possible undefined variable” at line 9 causes compilation to fail.
Answer: B