Technology Questions

Aggregate functions perform a calculation on a set of values and return a single value. Aggregate functions ignore NULL values except COUNT function. HAVING clause is used, along with GROUP BY, for filtering query using aggregate values.

Following functions are aggregate functions. 

AVG, MIN CHECKSUM_AGG, SUM, COUNT, STDEV, COUNT_BIG, STDEVP, GROUPING, VAR, MAX. VARP

Authorization: The process of granting access privileges to resources or tasks within an

application.

Authentication: The process of validating the identity of a user.

The standard query operators in LINQ are the extension methods that form the LINQ pattern. These operators form an API that enables querying of any .NET array or collection. It operates on sequences and allows you to perform operations, such as determining if a value exists in the sequence and performing an aggregated function, such as a summation over a sequence.

APK stands for Android Application Package.

Android Package (APK) is the package file format used by the Android operating system for distribution and installation of mobile apps and middleware.

Internet Service Provider (ISP) is a company offering access to internet. They offer various services:

1. Internet Access

2. Domain name registration

3. Dial-up access

4. Leased line access

There exist several ways to connect to the internet. Following are these connection types available:

* Dial-up Connection

* ISDN

* DSL

* Cable TV Internet connections

* Satellite Internet connections

* Wireless Internet Connections

READNEXT reads the next record from a browse operation for any of the three VSAM files.

Dropped tables can be recovered using DROP TABLE flashback. It works the way recycle bin works.
Example:
FLASHBACK TABLE EMPLOYEE TO BEFORE DROP;
The most recently dropped table with that original name is retrieved from the recycle bin, with its original name.