Star Hospitals Interview Questions and Answers

Inner HTML allows dynamic manipulation of HTML content using JavaScript.

• Inner HTML can be used to add, remove or modify HTML elements on a webpage.

• It provides a simple and efficient way to update the content of a webpage without reloading the entire page.

• Inner HTML can also be used to create dynamic user interfaces and interactive web applications.

• However, it is important to sanitize user input to prevent security vulnerabilities such as cross-site scripting (XSS) attacks.

JavaScript has 7 primitive datatypes and 1 complex datatype

• Primitive datatypes: string, number, boolean, null, undefined, symbol, bigint

• Complex datatype: object

• Example: var name = 'John'; var age = 25; var isStudent = true; var person = {name: 'John', age: 25};

Objects in JavaScript are used to store and manipulate data as key-value pairs.

• Objects can be created using object literals or the Object constructor.

• Properties and methods can be added to objects using dot notation or bracket notation.

• Objects can be used to represent real-world entities or abstract concepts.

• Objects can be passed as arguments to functions or returned as values from functions.

ASP is a scripting language while ASP.NET is a web application framework.

• ASP is interpreted while ASP.NET is compiled

• ASP uses VBScript or JScript while ASP.NET uses C# or VB.NET

• ASP is outdated while ASP.NET is the current technology

• ASP.NET has better performance and security features than ASP

Boxing is the process of converting a value type to a reference type, while unboxing is the opposite.

• Boxing is used to store value types in the heap memory

• Unboxing is used to retrieve the value type from the heap memory

• Boxing and unboxing can impact performance and should be used carefully

• Example: int i = 10; object obj = i; //boxing, int j = (int)obj; //unboxing

Delete removes specific rows while truncate removes all rows from a table.

• Delete is a DML command while truncate is a DDL command.

• Delete is slower than truncate as it logs each row deletion while truncate only logs the deallocation of data pages.

• Delete can be rolled back while truncate cannot be rolled back.

• Delete can have a WHERE clause to specify which rows to delete while truncate removes all rows.

• Delete does not reset the identity of the table while truncate resets the id...read more