Aristocrat Interview Questions and Answers

Q1. Reverse a string
Ans. 
Reverse a string by iterating through the characters and swapping them
• Create a function that takes a string as input

• Initialize two pointers, one at the beginning and one at the end of the string

• Swap the characters at the two pointers and move them towards the center until they meet
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Q2. Create a class for inheritance
Ans. 
Creating a class for inheritance in object-oriented programming
• Create a base class with common attributes and methods

• Create derived classes that inherit from the base class

• Use the 'extends' keyword in languages like Java or C++

• Override methods in the derived classes if necessary
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Basic DSA questions asked

Q1. What's the size of class with and without virtual function ?
Ans. 
The size of a class with virtual functions is larger than the size of a class without virtual functions due to the additional overhead of virtual function tables.
• Classes with virtual functions have an additional pointer to the virtual function table (vtable) which increases their size.

• The size of a class without virtual functions is determined by the size of its data members and any padding added for alignment.

• For exam...read more
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Q2. Reverse a linked list, benefit of reversing a doubly linked list ?
Ans. 
Reversing a linked list involves changing the direction of pointers, while reversing a doubly linked list allows for traversal in both directions.
• To reverse a linked list, iterate through the list and change the direction of pointers to point to the previous node instead of the next node.

• In a doubly linked list, reversing allows for traversal in both directions, making operations like deletion and insertion more effici...read more
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Q1. Design patterns
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Q2. Oops concept and implementation
Ans. 
Oops concept refers to Object-Oriented Programming principles and their implementation in software development.
• Oops concepts include inheritance, polymorphism, encapsulation, and abstraction.

• Inheritance allows a class to inherit properties and behaviors from another class.

• Polymorphism allows objects to be treated as instances of their parent class.

• Encapsulation hides the internal state of an object and only exposes nec...read more
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Q1. Asked AP related questions
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Q2. Related to Resume and scenerios
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Classes, oops, array, constructor

Q1. Write a code for copy constructor
Ans. 
A copy constructor is a special type of constructor that creates a new object as a copy of an existing object.
• Copy constructor should have a parameter of the same class type

• It is used to create a new object by copying the values of an existing object

• It is called when a new object is created from an existing object
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Q2. Write a code for virtual function
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A virtual function is a member function that is declared within a base class and is redefined by a derived class.
• Declare a virtual function in the base class using the 'virtual' keyword.

• Override the virtual function in the derived class using the 'override' keyword.

• Use the base class pointer to call the virtual function, which will be resolved at runtime based on the actual object type.
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Q1. What are ways to do async operations in JS & TS?
Ans. 
Ways to do async operations in JS & TS include callbacks, promises, async/await, and event listeners.
• Callbacks: Passing a function as an argument to be executed once the async operation is completed.

• Promises: Representing a value that may be available now, in the future, or never.

• Async/Await: Syntactic sugar built on top of promises to write asynchronous code that looks synchronous.

• Event Listeners: Using event-driven p...read more
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Q2. What is difference b/w prototype inheritance & classic inheritance ?
Ans. 
Prototype inheritance is dynamic and objects inherit directly from other objects, while classic inheritance is static and classes define the inheritance hierarchy.
• Prototype inheritance allows objects to inherit directly from other objects, without the need for classes.

• Classic inheritance involves defining classes and creating instances of those classes.

• In prototype inheritance, changes to the prototype object are refle...read more
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