ABB Artificial Intelligence Developer Interview Questions, Process, and Tips

Aptitude and logical questions

Q1. What is inheritance in oops?
Ans. 
Inheritance in OOP allows a class to inherit properties and behaviors from another class.
• Inheritance promotes code reusability by allowing a new class to take on the attributes and methods of an existing class.

• The class that is being inherited from is called the parent class or superclass, while the class that inherits is called the child class or subclass.

• Subclasses can add new methods or override existing methods fro...read more
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Q2. What is virtual function?
Ans. 
A virtual function is a function in a base class that is declared using the keyword 'virtual' and can be overridden by a function in a derived class.
• Virtual functions allow a derived class to provide a specific implementation of a function that is already defined in a base class.

• They enable polymorphism, where a function call is resolved at runtime based on the actual type of object being referred to.

• Virtual functions ...read more
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Q3. What is difference between array and liked list?
Ans. 
Arrays store elements in contiguous memory locations, while linked lists store elements in nodes with pointers to the next node.
• Arrays have fixed size, while linked lists can dynamically grow or shrink.

• Accessing elements in arrays is faster (O(1)), while accessing elements in linked lists is slower (O(n)).

• Inserting or deleting elements in arrays can be inefficient as it may require shifting elements, while in linked li...read more
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Q4. What is stack? and to implement it?
Ans. 
A stack is a data structure that follows the Last In, First Out (LIFO) principle.
• Stack is a collection of elements with two main operations: push (adds an element to the top) and pop (removes the top element).

• Common implementations of stack include using arrays or linked lists.

• Example: Pushing elements 1, 2, and 3 onto a stack would result in 3 being at the top, followed by 2, and then 1.
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Q5. What is string function in structures?
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String function in structures refers to operations that can be performed on string data within a data structure.
• String functions in structures can include operations like concatenation, substring extraction, searching, and comparison.

• For example, a structure may have a string member representing a person's name, and string functions can be used to manipulate or extract parts of the name.

• These functions can help in orga...read more
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