Aristocrat Interview Questions, Process, and Tips

They asked LRU implementation of data structure

Q1. Reflection API in java
Ans. 
Reflection API in Java allows for inspecting and modifying classes, methods, fields at runtime.
• Reflection API provides a way to examine and modify the behavior of classes, methods, and fields at runtime.

• It allows access to class information, such as constructors, methods, fields, annotations, etc.

• Reflection can be used for dynamic loading of classes, invoking methods at runtime, and examining annotations.

• Example: Using...read more
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Q2. Memory management jvm
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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
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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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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
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Q2. What is difference b/w prototype inheritance & classic inheritance ?
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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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Q1. What is the usability of game testing?
Ans. 
Game testing is crucial for ensuring the usability and functionality of a game before it is released to the public.
• Game testing helps identify bugs, glitches, and other issues that may affect the player experience.

• It ensures that the game runs smoothly on different devices and platforms.

• Game testers provide valuable feedback on gameplay, controls, graphics, and overall user experience.

• Usability testing can help improve...read more
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