Skipper Interview Questions and Answers

Struct is a value type while object is a reference type in C#.

• Structs are value types and stored on stack, while objects are reference types and stored on heap.

• Structs are passed by value, while objects are passed by reference.

• Structs do not support inheritance, while objects do.

• Example: struct Point { int x, y; } vs class Point { int x, y; }

Compiler programming languages convert source code into machine code before execution, while interpreter programming languages execute code line by line.

• Compiler programming languages: C, C++, Java

• Interpreter programming languages: Python, Ruby, JavaScript

let, var, and const are all used to declare variables in JavaScript, but they have different scopes and mutability.

• let: block-scoped, can be reassigned

• var: function-scoped, can be reassigned

• const: block-scoped, cannot be reassigned, but its properties can be modified

Polymorphism is the ability of a function or method to behave differently based on the object it is called with.

• Polymorphism allows objects of different classes to be treated as objects of a common superclass.

• It enables a single interface to be used for different data types.

• Examples include method overloading and method overriding in object-oriented programming.

To find the mid element in a linked list, use two pointers - one moving at double the speed of the other.

• Initialize two pointers, slow and fast, both pointing to the head of the linked list.

• Move the slow pointer by one step and the fast pointer by two steps until the fast pointer reaches the end of the list.

• The element pointed to by the slow pointer at this point is the mid element of the linked list.