HCL Infosystems Senior Sharepoint Developer Interview Questions and Answers

let vs var in JavaScript and hosting

• let has block scope while var has function scope

• let cannot be redeclared in the same scope while var can

• Hosting is the process of moving a website or application to a server

• JavaScript can be hosted on various platforms such as AWS, Heroku, and Firebase

C language is a general-purpose, procedural computer programming language.

• Developed by Dennis Ritchie at Bell Labs in 1972

• Used for system programming, embedded systems, and application software

• Influenced many other programming languages such as C++, Java, and Python

Count the number of pairs in an array whose sum is equal to a given number k.

• Iterate through the array and for each element, check if k minus the element exists in the array.

• Use a hash table to store the frequency of each element in the array.

• If the array contains duplicates, handle them separately to avoid overcounting.

• Time complexity can be improved to O(n) using a two-pointer approach.