Question
Which of the following best describes Abstraction in
Object-Oriented Programming (OOP)?Solution
Abstraction is a core concept of OOP that focuses on hiding unnecessary implementation details while exposing only the essential features of an object. This is achieved through abstract classes and interfaces. For instance, a Car class might expose methods like start() or drive() without detailing how the engine works internally. Abstraction simplifies the development process by allowing programmers to focus on high-level logic rather than low-level complexities. It also enhances security by preventing direct access to sensitive parts of an application. Why Other Options Are Incorrect : 2. Restricting access to certain parts of an object to protect data : This describes Encapsulation , not Abstraction. Encapsulation involves bundling data and methods together and using access modifiers to control visibility. 3. Combining different objects into a single unit to represent a relationship : This describes Aggregation , where objects are linked to represent "has-a" relationships, like a Library having Books. 4. Allowing multiple classes to share the same method name but with different implementations : This defines Polymorphism , specifically method overriding or overloading, and is unrelated to abstraction. 5. Establishing a parent-child relationship between classes : This is Inheritance , where one class derives from another, enabling code reuse and hierarchy building.
If 'L' means '×', 'M' means '-', 'N' means '+', and 'O' means '÷', then what will be the value of the following expression?
6 L 25 M 15 N 45 O ...
Statements:
Some rats are mats.
All mats are ants.
Conclusions:
I. Some rats are ants.
II. Some ants are mats.
Read the given statements and conclusions carefully. Assuming that the information given in the statements is true, even if it appears to be at variance...
Which letter-cluster will replace the question mark (?) to complete the given series?
MKPN, LMOP, ?, JQMT, ISLV
Select the figure from among the given options that can replace the question mark (?) in the following series and complete the pattern.
Select the figure from the given options that will replace the question mark (?) in the figure given below to complete the pattern.
Â
Choose the one which is different from the rest.
Six friends A, C, D, E, F and G are sitting in a straight row, facing north. They are waiting for their seventh friend B to join. Exactly three people a...
Read the given statements and conclusions carefully. Assuming that the information in the statements is true, even if they appear to be at variance with...
Who is sitting third to the right of Meera?