Latest Huawei Aptitude Question SOLUTION: Find the wrong option Class B extends A a)A a=new A(); b)B b=new B(); c)A a=new B(); d)B b=new A();

• Placement Papers
• /
• Huawei
• /
• Programming
• /
• Technical

Huawei Question Papers: HUAWEI Company Profile

(#M40154727) HUAWEI Programming question 21 NOV 2015 Oxford College Keep an EYE

Find the wrong option
Class B extends A

a)A a=new A();
b)B b=new B();
c)A a=new B();
d)B b=new A();

Asked In Huawei ABHINAV KUMAR (8 years ago)

Unsolved Read Solution (4)

Is this Puzzle helpful?   (4)   (3) Submit Your Solution Technical

Read Solution (4) :

prasanth  (8 years ago)

here classB extends Class A;
it means we are creating a Class B(THAT IS EXTENDING CLASS A) therefore in classB we have all the features of class A HENCE WE CAN CREATE OBJECTS FROM CLASS B(sub class) to super class(ClassA)
B b = new B();//correct assignment i.e we are creating object for sub class(B) in sub class itself
A a = new A();//correct assignment i.e we are creating object for super class(A) in sub class itself(which has Class A features)
A a = new B();//creating object for sub class in super class which is not possible y bcz in superclass there is no class B features where as in class B has Class A features so i think ther is no way in creating a sub class object in super calss so option C is incorrect
B b = new A();//IN SUB CLASS we are creating object for super class which is possibele

Is this solution Helpfull? Yes (12) | No (3)  

ABHINAV KUMAR  (8 years ago)

We know that to the super class reference (for Eg. Object Class ) we can assign sub class object.
So here A is the super class and B is the sub class.So we can assign B(sub class) object to A(super class reference).

A a =new B(); is correct assignment.

So, a),b),c) are correct.

Therefore d) option is the wrong assignment.
So d) is the answer.Hare Krishna

Is this solution Helpfull? Yes (9) | No (7)  

riyaz  (8 years ago)

d is the correct amswer

Is this solution Helpfull? Yes (2) | No   

SIDDHARTHA KABIRAJ  (6 years ago)

A a = new B();

Is this solution Helpfull? Yes (1) | No   

Please Login to Read Solution.