Aptitude and OOP Concepts Assessment

What is the next number in the series: 2, 4, 8, 16, ?

• 32

• 64

• 24

• 40

If A is taller than B and B is taller than C, who is the shortest?

• B

• D

• C

• A

In a certain code language, if 'CAT' is coded as '3120', how is 'DOG' coded?

• 2145

• 3056

• 4157

• 4178

Which of the following is a valid pointer declaration in C?

• float *ptr;

• int ptr;

• char ptr;

• int *ptr;

What is polymorphism in OOP?

• Polymorphism is the ability to create multiple instances of a class.

• Polymorphism refers to the process of combining multiple classes into one.

• Polymorphism is the ability of a class to inherit properties from multiple classes.

• Polymorphism is the ability of different classes to be treated as instances of the same class through a common interface.

How do you access the value pointed to by a pointer in C?

• Use the dereference operator '*' to access the value pointed to by a pointer.

• Use the increment operator '++' to retrieve the value from the pointer.

• Access the value directly using the pointer variable without any operator.

• Use the address operator '&' to access the value pointed to by a pointer.

What is the output of the following code: int a = 5; int *p = &a; printf('%d', *p);?

• 6

• 10

• 4

• 5

Explain the concept of inheritance in OOP.

• Inheritance allows a subclass to inherit attributes and methods from a superclass, promoting code reuse and establishing a class hierarchy.

• Inheritance allows a class to inherit only private methods from another class.

• Inheritance is a way to delete attributes from a superclass.

• Inheritance is a method to create new classes without any relationship to existing ones.

What is the difference between compile-time and run-time polymorphism?

• Compile-time polymorphism is resolved during compilation, while run-time polymorphism is resolved during program execution.

• Compile-time polymorphism is a type of inheritance, while run-time polymorphism is not.

• Both compile-time and run-time polymorphism are resolved during execution.

• Compile-time polymorphism occurs at run-time, while run-time polymorphism occurs at compile-time.

How do you declare a pointer to a function in C?

• int ptr(int, int);

• int (*ptr)(int, int);

• int *ptr(int, int);

• int (*ptr[])(int, int);