Question
The C.I on a sum of Rs. 6400 becomes Rs. 1276.5625 in 9
months. Find the rate of interest, if the rate of interest is compounded quarterly?Solution
P = Rs 6400 T = 9 months = 3/4 years C.I = Rs 1276.5625 Amount = C.I + P Amount = 6400 + 1276.5625 Amount = Rs 7676.5625 A = P`(1+r/(4xx100))` 4t 7676.5625 = 6400`(1+r/400)^(4xx3/4)` `76765625/64000000` = `(1+r/400)` 3 `614125/512000` = `((400+r)/400)` 3 `(85/80)^3` = `((400+r)/400)` 3 `85/80` = `(400+r)/400` 85 × 5 = 400 + r r = 425 – 400 r = 25% p.a
The ability of an object to take on many forms is known as:
An abstract class:
What is an interface in OOP (e.g., Java, C#)?
What are "getter" and "setter" methods primarily used for in the context of encapsulation?
Which of the following is a common mechanism to achieve abstraction in OOP?
Which of the following best represents a real-world example of abstraction?
Which of the following is a common way to achieve abstraction in OOP?
Which access modifier is most commonly used to achieve data hiding in encapsulation?
Which type of polymorphism is achieved through method overloading (where multiple methods have the same name but different parameters)?
If a class contains an abstract method, what must be true about the class itself?
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