Java Programming Questions and Answers
1
Which of the following class is not included in java.lang?
correct answer c
2
Which of these is a process of converting a simple data type into a class?
correct answer a
3
Which of these is a super class of wrappers Double & Integer?
correct answer d
4
Which of these methods is used to check for infinitely large and small values?
correct answer a
5
What is the output of this program?
classisinfinite_output{
publicstaticvoidmain(String args[]){
Double d = new Double(1 / 0.);
boolean x = d.isInfinite();
System.out.print(x);
}
}correct answer c
6
What is the output of this program?
classisNaN_output{
publicstaticvoidmain(String args[]){
Double d = new Double(1 / 0.);
boolean x = d.isNaN();
System.out.print(x);
}
}correct answer d
7
What is the output of this program?
classbinary{
publicstaticvoidmain(String args[]){
int num = 17;
System.out.print(Integer.toBinaryString(num));
}
}correct answer d
8
Which of these method of class String is used to obtain length of String object?
correct answer d
9
Which of these operators can be used to concatenate two or more String objects?
correct answer a
10
Which of these methods is used to obtain value of invoking object as a long?
correct answer b
