Computer Applications
Define an Object with an example.
Objects & Classes
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Answer
An object is an entity having a specific identity, specific characteristics and specific behaviour. Taking a car as an example of an object, it has characteristics like colour, model, version, registration number, etc. It has behaviours like start the engine, stop the engine, accelerate the car, apply the brakes, etc.
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Related Questions
Assertion (A): A car can be defined as a real world object that possesses some characteristics and behaviour.
Reason (R): Each real world object may contain some characteristics but not behaviour.
Based on the above discussion, choose an appropriate statement from the options given below:
- Both Assertion (A) and Reason (R) are true and Reason (R) is a correct explanation of Assertion (A).
- Both Assertion (A) and Reason (R) are true and Reason (R) is not a correct explanation of Assertion (A).
- Assertion (A) is true and Reason (R) is false.
- Assertion (A) is false and Reason (R) is true.
Your friend has tried to write a program using a class as shown below:
............... class Friend_list // Line 1 { void disp_name() { System.out.println("Amit Kumar"); } void disp_address() { System.out.println("Lane B: 3/1, Akash Ganga"); System.out.println("Mayur Vihar, New Delhi"); } public static void main() { Friend_list myself = new ...............(); // Line 2 ................disp_name(); // Line 3 myself................();// Line 4 } }
Due to confusion, he could not complete the above program. He left blank spaces in some of the statements marked with Line 1, Line 2, Line 3 and Line 4 that are to be filled with appropriate keywords/objects.
Help your friend to complete his program by answering the following questions:
(a) Name the access specifier that should be filled in the statement marked with Line 1.
(b) Name the element to be filled in the statement marked with Line 2.
(c) What should be filled in the statement marked with Line 3?
(d) What function name should be filled in the statement marked with Line 4?
Mention five states (characteristics) and two methods for Class Employee.
Mention five states (characteristics) and two methods for Class Bank.