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Q:

What is the concept of Application Cache in HTML5? What are its advantages?

Answer

The Application Cache concept introduced by HTML5 means that a web application is cached, and accessible without an internet connection.


There are three advantages of Application Cache:


1.Offline browsing - users can use the application when they're offline


2.Speed - cached resources load faster


3.Reduced server load - the browser will only download updated/changed resources from the server

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Subject: Web Technology

Q:

Differentiate between localStorage and sessionStorage objects.

Answer

- localStorage object stores the data without an expiry date while sessionStorage object stores the data only for one session. 


- With localStorage object, data will not be deleted when the browser window is closed while the data is deleted when the browser window closes with sessionStorage objects.

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Subject: Web Technology

Q:

What is HTML5 Web Storage?

Answer

With HTML5, it is possible for the web pages to store the data locally in the user's browser. This web storage is much faster and secured than the cookies. Also, a larger amount of data can be stored without causing any adverse effect to the performance of the website. 


The data here is not included with every server request. It is used ONLY when it is asked for. It is only that particular web page that can access the data stored by itself.

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Subject: Web Technology

Q:

What are the new features provided in HTML5?

Answer

Some of the new features provided in HTML5 are:


- It provides support for local storage


- New form controls, like calendar, date, time, email, url, search


- <canvas> element is provided to facilitate 2D drawing


- The <video> and <audio> elements are provided for media playback


- New content-specific elements are provided. For e.g. <article>, <header>, <footer>, <nav>, <section>

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Subject: Web Technology

Q:

Write SQL Query to find second highest salary of Employee.

Answer

There are many ways to find second highest salary of Employee in SQL, you can either use SQL Join or Subquery to solve this problem. Here is SQL query using Subquery :


SELECT MAX(Salary) from Employee WHERE Salary NOT IN (select MAX(Salary) FROM Employee );

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Subject: SQL

Q:

Write an SQL Query find number of employees according to gender whose DOB is between 01/01/1960 to 31/12/1975.

Answer

SELECT COUNT(*), sex from Employees  WHERE  DOB BETWEEN ‘01/01/1960 ' AND ‘31/12/1975’  GROUP BY sex;

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Subject: SQL

Q:

find all Employee records containing the word "Joe", regardless of whether it was stored as JOE, Joe, or joe.

Answer

SELECT  * from Employees  WHERE  upper(EmpName) like upper('joe%');

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Subject: SQL

Q:

Write a SQL Query to find year from date.

Answer

SELECT YEAR(GETDATE()) as "Year";

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Subject: SQL