PurpleTalk Interview Questions and Answers for Freshers

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. JS - closures , hoisting, event loop ,
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Q2. Mongodb - sharding , clutering
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Javascript programs - check sum , sql vs mongodb , system desgin

OA with OOP questions

1 hr pair programming on hackerrank

Q1. Why do you want to work at EA
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Q2. Describe a time you have a conflict
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Q1. What happens when you use a copy constructor in C++
Ans. 
Using a copy constructor in C++ creates a new object by copying the values of another object.
• Copy constructor is a special member function that creates a new object as a copy of an existing object.

• It is invoked when a new object is created from an existing object.

• Example: MyClass obj1; MyClass obj2 = obj1; // Copy constructor is called to create obj2 as a copy of obj1.
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Q2. When to use pointer/reference
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Pointers/references are used to pass memory addresses instead of values, for efficiency and to modify data directly.
• Use pointers when you need to modify the original data passed to a function

• Use references when you want to avoid copying large data structures

• Pointers are commonly used in dynamic memory allocation

• References are used in function parameters to avoid unnecessary copying

• Example: int x = 10; int *ptr = &x; *p
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Basics web development MCQ

Core knowledge on JS and code snippet

Q1. DSA on array and string and deep knowledge in JS
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Q1. It was manager round
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Based on DSA in C# be thorough with heap tree and map from dsa