A software engineer is required to implement two sets of algorithms for a single set of matrix operations in an object oriented programming language; the two sets of algo­rithms are to provide precisions of 10^-3 and 10^-6, respectively. She decides to implement two classes, Low Precision Matrix and High Precision Matrix, providing precisions 10^-3 and 10^-6 respectively. Which one of the following is the best alternative for the imple­mentation?

(S1) The two classes should be kept independent.
(S2) Low Precision Matrix should be derived from High Precision Matrix.
(S3) High Precision Matrix should be derived from Low Precision Matrix.
(S4) One class should be derived from the other; the hierarchy is immaterial.

What is the output of the following JAVA program ?

class simple 
{ 
     public static void main(String[] args) 
     { 
          simple obj = new simple(); 
          obj.start();
     } 
     void start()
     {
          long [] P = {3, 4, 5}; 
          long [] Q = method (P); 
          System.out.print (P[0] + P[1] + P[2]+”:”); 
          System.out.print (Q[0] + Q[1] + Q[2]); 
     }
     long [] method (long [] R) 
     { 
          R [1] = 7; return R; 
     }
} //end of class

In Java, which of the following statements is/are True ?

S1 : The ‘final’ keyword applied to a class definition prevents the class from being extended through derivation.
S2 : A class can only inherit one class but can implement multiple interfaces.
S3 : Java permits a class to replace the implementation of a method that it has inherited. It is called method overloading.

Which of the following statements is/are True ?

1. Abstraction and encapsulation
2. Strictly-typed
3. Type-safe property coupled with sub-type rule
4. Polymorphism in the presence of inheritance

1. Math.max(1,4)
2. Math.max(2.3,5)
3. Math.max(1,3,5,7)
4. Math.max(-1.5,-2.8f)

Run-time polymorphism is achieved by

The operator that cannot be overloaded is

The keyword friend does not appear in

The C++ statement cout <<(0 ==0) will