What is the result?()
A.The code runs with no output.
B.An exception is thrown at runtime.
C.Compilation fails because of an error in line 20.
D.Compilation fails because of an error in line 21.
E.Compilation fails because of an error in line 23.
F.Compilation fails because of an error in line 25.
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What is the result?()
A.3, 2, 1
B.1, 2, 3
C.Compilation fails.
D.The code runs with no output.
E.An exception is thrown at runtime.
What is the result?()
A.A,B,C
B.B,C,A
C.Compilation fails.
D.The code runs with no output
E.An exception is thrown at runtime.
What inserted at line 39, will sort the keys in the props HashMap?()
A.Arrays.sort(s);
B.s = new TreeSet(s);
C.Collections.sort(s);
D.s = new SortedSet(s);
What is the result?()
A.2,1,0
B.2,1,1
C.3,2,1
D.3,2,2
E.Compilation fails.
F.An exception is thrown at runtime.
Given that the elements of a PriorityQueue are ordered according to natural ordering, and:
What is the result?()
A.apple pear
B.banana pear
C.apple apple
D.apple banana
E.banana banana
Which three code fragments, inserted independently at line 6, will compile?()
A.list.add("foo");
B.Object o = list;
C.String s = list.get(0);
D.list = new ArrayList<String>();
E.list = new ArrayList<Object>();
Which two, inserted at line 11, will allow the code to compile?()
A.public class MinMax<?>{
B.public class MinMax<? extends Number>{
C.public class MinMax<N extends Object>{
D.public class MinMax<N extends Number>{
E.public class MinMax<? extends Object>{
F.public class MinMax<N extends Integer>{
What is the result?()
A.0
B.1
C.2
D.3
E.4
F.Compilation fails.
G.An exception is thrown at runtime.
What is the result?()
A.Compilation fails due to an error in line 23.
B.Compilation fails due to an error in line 29.
C.A ClassCastException occurs in line 29.
D.A ClassCastException occurs in line 31.
E.The value of all four objects prints in natural order.
Which method will complete this class?()
A.public int compareTo(Object o){/* more code here */}
B.public int compareTo(Score other){/* more code here */}
C.public int compare(Score s1, Score s2){/* more code here */}
D.public int compare(Object o1, Object o2){/* more code here */}
最新试题
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Which code, inserted at line 4, guarantees that this program will output [1, 2]?()
Which statement is true?()
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