So Delhi Interview Questions and Answers

Reactjs is preferred nowadays due to its component-based architecture, virtual DOM for efficient updates, and strong community support.

• Component-based architecture allows for reusability and easier maintenance of code.

• Virtual DOM enables efficient updates by only re-rendering components that have changed.

• Strong community support provides a wealth of resources, libraries, and tools for developers.

• React's declarativ...read more

JavaScript is a high-level, interpreted programming language used for creating interactive websites.

• JavaScript is commonly used for client-side web development.

• It can also be used for server-side development with Node.js.

• JavaScript allows for dynamic content, animations, and interactive features on websites.

Sort an array of 0s and 1s in ascending order.

• Use a sorting algorithm like bubble sort or quick sort.

• Loop through the array and swap 0s with 1s if necessary.

• Alternatively, count the number of 0s and 1s and recreate the array with the correct order.

To find middle node of a linked list, use two pointers - slow and fast.

• Initialize slow and fast pointers to the head of the linked list

• Move slow pointer one step at a time and fast pointer two steps at a time

• When fast pointer reaches the end of the list, slow pointer will be at the middle node

Classes and structures are both used to create custom data types in object-oriented programming, but they have some key differences.

• Classes are reference types, while structures are value types.

• Classes support inheritance and polymorphism, while structures do not.

• Classes have a default initializer, while structures do not.

• Classes can have deinitializers, while structures cannot.

• Classes can be passed around as refe...read more