JAVA LANG AND JAVA IO MCQs

Which of these classes is not included in java.lang

Which of these is a process of converting a simple data type into a class?

Which of these is a super class of wrappers Double & Integer?

Which of these is a wrapper for simple data type float?

Which of the following is a method of wrapper Float for converting the value of an object into byte?

Which of these methods is used to check for infinitely large and small values?

Which of the following package stores all the simple data types in java

What is the output of this program

    class isinfinite_output 
    {
        public static void main(String args[]) 
        {
            Double d = new Double(1 / 0.);  
            boolean x = d.isInfinite();
            System.out.print(x);
        }
    }

What is the output of this program?

    class isNaN_output 
    {
        public static void main(String args[]) 
        {
            Double d = new Double(1 / 0.);  
            boolean x = d.isNaN();
            System.out.print(x);
        }
    

What is the output of this program?

  class binary 
    {
         public static void main(String args[]) 
         {
             int num = 17;
             System.out.print(Integer.toBinaryString(num));
         }
    }

Which of these is a wrapper for data type int

Which of the following methods is a method of wrapper Integer for obtaining hash code for the invoking object?

Which of these is a super class of wrappers Long, Character & Integer?

Which of these is a wrapper for simple data type char

Which of the following is method of wrapper Integer for converting the value of an object into int?

Which of these methods is used to obtain value of invoking object as a long?

What is the output of this program?

    class Output 
    {
        public static void main(String args[]) 
        {
            char a[] = {'a', '5', 'A', ' '};   
            System.out.print(Character.isDigit(a[0]) + " ");
            System.out.print(Character.isWhitespace(a[3]) + " ");
            System.out.print(Character.isUpperCase(a[2]));
        }
    }

What is the output of this program?

    class Output 
    {
        public static void main(String args[]) 
        {
            Integer i = new Integer(257);  
            byte x = i.byteValue();
            System.out.print(x);
        }
    }

Which of these class have only one field ‘TYPE’?

Which of the following method of Process class can terminate a process?