Consider Classes A, B and C, Where a Is an Abstract

question 14

Multiple Choice

Consider classes A, B and C, where A is an abstract superclass, B is a concrete class that inherits from A and C is a concrete class that inherits from B. Class A declares abstract method originalMethod, implemented in class B. Which of the following statements is true of class C?

• A) Method originalMethod cannot be overridden in class C-once it has been implemented in concrete class B, it is implicitly final.
• B) Method originalMethod must be overridden in class C, or a compilation error will occur.
• C) If method originalMethod is not overridden in class C but is called by an object of class C, an error occurs.
• D) None of the above.

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Definitions:

Nonsystematic Variance

The portion of an asset's total variance that is attributable to factors unique to that specific asset, as opposed to broader market influences.

Market Index

A metric that measures the performance of a basket of securities intended to represent a particular market or segment of it, like the S&P 500 or NASDAQ.

Treynor-Black Model

A portfolio optimization model that integrates market equilibrium theory with security selection to enhance portfolio performance.

Nonsystematic Risk

The risk associated with an individual asset or company, which can be reduced through diversification, unlike systematic risk.