3i Infotech Papers: Sample Questions 923  925 of 1245
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Question number: 923
» Aptitude
Question
If the sum of the roots of the equation 0 is equal to the sum of the squares of their reciprocals then are in
Choices
Choice (4)  Response  

a.  GP 

b.  HP 

c.  AP 

d.  All of the above 

Answer
b.Explanation

Consider, be the roots of this equation then,
……… equation 1

Now, it is given that sum of roots is equal to square of reciprocal of roots

Now putting value of and from equation 1
…………… equation 2

Now let are in HP then

This result is similar to equation

Therefore, these terms are in HP.
Question number: 924
Describe in Detail
What is the difference between java and C++
Explanation
Java  C++ 
No semicolon.  End with a semicolon. 
Modifiers can be added to each data field or method individually.  Divided into major sections by private, protected and public. 
Extends to indicate inheritance from a parent class.  Class A, B, C, D to indicate inheritance. 
Class contains member function implementation.  Member function implementation can be external to class. 
Question number: 925
Describe in Detail
Why generalization is very strong?
Explanation

Even though Generalization satisfies Structural, Interface, Behaviour properties. It is mathematically very strong, as it is Antisymmetric and Transitive.

Antisymmetric: Relations like: employee is a person, but not all persons are employees. Mathematically all As’ are B, but all Bs’ not A.

Transitive: A= > B, B= > c then A= > c.

A. Salesman

B. Employee.

C. Person



Note: All the other relationships satisfy all the properties like Structural properties, Interface properties, Behavior properties.