American InfoSource BI Analyst Interview Questions and Answers

executequery, execute scalar, executenon query are SQL methods for executing queries.

• ExecuteQuery is used to execute a SELECT statement and returns a ResultSet object.

• ExecuteScalar is used to execute a SELECT statement that returns a single value.

• ExecuteNonQuery is used to execute INSERT, UPDATE, DELETE statements and returns the number of rows affected.

State management in client and server side

• Client-side state management: cookies, local storage, session storage, and query parameters

• Server-side state management: session state and application state

• Cookies are small text files stored on the client's computer

• Local storage and session storage are HTML5 web storage APIs

• Session state is stored on the server and associated with a user's session

• Application state is stored on

Inproc is a state management mode where data is stored in the application's memory.

• Inproc stands for 'in-process'.

• Data is stored in the application's memory, making it fast to access.

• This mode is suitable for small applications with low traffic.

• If the application is restarted, all data stored in inproc mode is lost.

• Examples of inproc state management include ASP.NET's in-process session state and Cache API.

State management techniques are required to manage the state of an application and ensure data consistency.

• State management helps in maintaining the state of an application and ensures that data is consistent across different components.

• It helps in managing complex applications with multiple components and data sources.

• State management techniques like Redux, MobX, and Context API provide a centralized store for managin...read more

Viewstate technique can lead to performance issues and security vulnerabilities.

• Viewstate increases the size of the page, leading to slower load times.

• Viewstate can be tampered with, leading to security vulnerabilities.

• Viewstate is stored on the client side, leading to potential data privacy issues.

• Viewstate can cause issues with scalability in web applications.

• Alternative techniques like session state or caching can b

The inline attribute in HTML is used to specify that a particular element should be displayed inline.

• The inline attribute can be used with elements like <span>, <strong>, <em>, <a>, etc.

• It allows the element to be displayed on the same line as adjacent elements.

• Example: <span inline>Inline element</span>

Ajax is a technique for creating fast and dynamic web pages without reloading the entire page.

• Ajax stands for Asynchronous JavaScript and XML

• It allows for asynchronous communication between the client and server

• It can update parts of a web page without requiring a full page reload

• Examples of Ajax include auto-suggest search bars and real-time chat applications

Angular has several lifecycle methods that are called at different stages of a component's life.

• ngOnInit() - called after the component is initialized

• ngOnChanges() - called when the component's input properties change

• ngDoCheck() - called during every change detection cycle

• ngAfterViewInit() - called after the component's view has been initialized

• ngOnDestroy() - called just before the component is destroyed

Pipes are a feature in Angular that allow for data transformation before displaying it in the view.

• Pipes are used to format data in the view

• They can be used to filter, sort, and transform data

• Examples include the date pipe, currency pipe, and uppercase pipe

Global error handling in Angular can be done using ErrorHandler class.

• Create a class that implements the ErrorHandler interface

• Override the handleError() method to handle errors globally

• Provide the ErrorHandler class in the providers array of AppModule

• Use the error handling service to log errors or display error messages

Custom directives are a way to extend HTML with new attributes and functionality.

• Types of custom directives are attribute, element, and class directives.

• Attribute directives modify the behavior of existing HTML elements.

• Element directives create new HTML elements.

• Class directives modify the behavior of existing HTML elements based on their class.

• To create a custom directive, use the directive() method of the AngularJS ...read more