Test on JAVA P10 test
Multiple choice questions on Java programming help you test your basic knowledge of this programming language. The set of questions includes 10 sentences to try.
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Question 1. Given str = 'Yunlin university', what is the result of str.lastIndexOf ('i')?
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4
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14
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7
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There is no right answer
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Question 2. Given str = 'Yunlin university', what is the result of str.lastIndexOf ('i', 7) returning results?
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4
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14
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7
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-first
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Question 3. Given str = 'Yunlin university', what is the result of str.lastIndexOf ('sti')?
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4
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14
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false
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-first
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Question 4. After running the command block s =?
int s = 0;
for (int i = 3; i <10; i ++)
s + = i;-
42
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55
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9
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29
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-
Question 5. After running the command block s =?
for (int i = 0; i <= 10; i ++) {
int s = 0;
s + = i;}
System.out.print (s);-
0
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55
-
45
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Wrong command
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Question 6. After running the command block s =?
int s = 0;
for (int i = 0; i <= 10; i ++)
s + = i;-
45
-
55
-
56
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0
-
-
Question 7. If the program runs with the java message -g cruel world command, what is the value of the args [1] parameter?
public static void main (String [] args) {
if (args [0] .equals ('- g'))
System.out.print ('Goodbye,');
for (int i = 1; i
System.out.print ('' + args [i]); }-
-g
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cruel
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world
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-g cruel world
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Question 8. If the program runs with the java message -g cruel world, what is the result?
public static void main (String [] args) {
if (args [0] .equals ('- g'))
System.out.print ('Goodbye,');
for (int i = 1; i
System.out.print ('' + args [i]); }-
-g cruel world
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cruel world
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Goodbye, cruel world
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Goodbye cruel world
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Question 9. If initializing two class A objects extending KiemTra and class B extends KiemTra, the id of object A is valid:
class KiemTra {
private int i;
private int nextId;
public void setId () {
id = nextId;
nextId ++;
}
}-
0
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first
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2
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Void
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Question 10. If initializing two class A objects, the KiemTra and class B extends extends KiemTra, the id of object B is valid?
class KiemTra {
private int i;
private int nextId;
public void setId () {
id = nextId;
nextId ++;
}
}-
0
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first
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3
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Void
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