java选择题（Java multiple-choice questions）.doc

java选择题（Java multiple-choice questions）.docjava选择题(Java multiple-choice questions)
49. give the following code to ask which statement is inserted in the tenth line of the program, and the program can run essfully
Line IntType
Line String getType (String a, int b, char c) {
Line holdit1 =new String ();
Line =a;
Line holdit1;
Line 6.}
Line 7.}
Line 8.
Line OverType extends IntType{
Line 10.
Line holdit2 = new String ();
Line = ("This is").Concat (a);
Line holdit2;
Line 14.}
Line 15.
Line static void main (String[] a) {
Line ot = new OverType ();
Line x = new String ("X");
Line y =1;
Line z ='b';
Line (getType (x, y, z));
Line 22.}
Line 23.}
Please select all the correct answers:
(1) public Text getType (String a, int b, char c) {
(2) public Text getType (int b, String a, char c) {
(3) public String getType (String a, int b, char c) {
(4) public String getType (int b, String a, char c) {
50. which statements are used in Java language for interrupt cycle execution?
Please choose a correct answer:
(1) continue statement
(2) goto statement
(3) exit statement
(4) break statement
51. excuse me, where is the wrong code below?
Public class Example{
Public static void main (String[] args) {
For (i=0; j=0, i<10; ++i, j+=i) {
K+=i*i+j*j;
}
}
}
Please select all the correct answers:
(1) more than one sentence should be more than one sentence block
(2) comma should be used between i=0 and j=0
(3) two circular variables are used
(4) semicolon should be used between j=0 and i<10
52. excuse me, where is the following code fragment wrong?
For (int i=0; i<10; ++i) {
If (x[i]>100) break;
If (x[i]<0) continue;
X[i+1]=x[i]+y[i];
}
Please choose a correct answer:
(1) it is illegal to appear both break and continue statements in the same for loop statement
(2) the variable I should not be declared and initialize