Data Types and Variables -Java Programming MCQ Questions and Answers

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51.
What is the output for the below code?
public class Test{
      int _$;
      int $7;
      int do;

      public static void main(String argv[]){
            Test test = new Test();
            test.$7=7;
            test.do=9;
            System.out.println(test.$7);
            System.out.println(test.do);
            System.out.println(test._$);
      }
}

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52.
What is the output for the below code?
public class Test{
      public static void main(String[] args){
            int i = 010;
            int j = 07;
            System.out.println(i);
            System.out.println(j);
      }
}

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53.
What is the output for the below code?
public class Test{
      public static void main(String[] args){
            byte b = 6;
            b+=8;
            System.out.println(b);
            b = b+7;
            System.out.println(b);
      }
}

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54.
What will be the output for the below code?
public class Test{
      public static void main(String[] args){
            byte i = 128;
            System.out.println(i);
      }
}

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55.
What will be the output for the below code?
public class Test{
      int i=8;
      int j=9;
      public static void main(String[] args){
            add();
      }
      public static void add(){
            int k = i+j;
            System.out.println(k);
     }
}

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56.
What will be output of following program?
public class Test{
      public static void main(String[] args){
            byte b=127;
            b++;
            b++;
            System.out.println(b);
      }
}

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57.
Determine output:
public class Test{
      int a = 10;
    
      public void method(int a){
            a += 1;
            System.out.println(++a);
      }
      public static void main(String args[]){
            Test t = new Test();
            t.method(3);
      }
}

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60.
What will be the output of the following Java code snippet?
double a = 0.02;
double b = 0.03;
double c = b - a;
System.out.println(c);

BigDecimal _a = new BigDecimal("0.02");
BigDecimal _b = new BigDecimal("0.03");
BigDecimal _c = b.subtract(_a);
System.out.println(_c);

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