DraftKings Analyst 1 Interview Questions and Answers

Link list program, few objective based on cpp

Q1. Good Core knowledge cpp
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Q2. Pointer, static , constant used in multiple scenario. Oops, STL
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Q1. Merge sorted arrays
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Merge two sorted arrays into a single sorted array efficiently.
• Use two pointers to track the current index of each array.

• Compare the elements at both pointers and append the smaller one to the result array.

• Increment the pointer of the array from which the element was taken.

• Continue until all elements from both arrays are processed.

• Example: Merging [1, 3, 5] and [2, 4, 6] results in [1, 2, 3, 4, 5, 6].
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Q1. Checking cache using python
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Use Python's built-in 'functools' module to check cache for function results.
• Import 'functools' module

• Use 'lru_cache' decorator to cache function results

• Specify 'maxsize' parameter to limit cache size

• Use 'cache_info()' method to get cache statistics
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Q1. C# fundamentals, database
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Q1. Behavioural question
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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. Design patterns
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Q2. Oops concept and implementation
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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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