Answer:
A query in a database is a request for information stored within a database management system (DBMS), which is the software program that maintains data.
SQL(Structured Query Language ( is a standard language for storing, manipulating, and retrieving data in database.
Five types of SQL queries are:
1) Data Definition Language (DDL).
used to define and modify the structure of a database.
2) Data Manipulation Language (DML).
used to manipulate (change) the data in the database.
3) Data Control Language(DCL).
used for access control and permission management for users in the database.
4) Transaction Control Language(TCL).
used for maintaining consistency of the database and for the management of transactions made by the DML commands.
5) Data Query Language (DQL).
used for performing queries on the data within schema objects.
Answer:
123456
Explanation:
When an integer value is added to a string value the resulting value is a string.+ operator is used for both numeric additions and string addition also knows as string concatenation. In addition when one operand of the equation is a string the program interprets all values as string. As system is interpreting all values as a string it will apply a string addition method instead of mathematical addition.So here A is a string and B is an integer value. when we add A and B system will treat B aslo as a string, upon addition the result will be String concatenating both A and B to a single string.Hence the result of A+B will be
A+B = 123456
As WriteLine method takes string as Input it will just write the resulting string to file
Answer:
OA.
MTurk(mechanical turk)
Explanation:
Mechanical Turk is a Microwork service provided by Amazon. Correct answer: C It is an online “crowdsourcing” marketplace that was launched in 2005 by Amazon.
This site (service) allows businesses and individuals to post short tasks and pay workers to complete them.
The right code is,
secondWord = sentence.substr (sentence.find ("`") + 1);
secondWord = secondWord.substr (0, secondWord.find ("`"));
Zenmap is the graphical User Interface representation for
NMAP Security Scanner. It is an open-source program designed to make NMAP easy
for starters to use. Typically, it is used to collect and identify a list of
hosts, OS, as well what services are running on them by using a port scanning
tool. It is used specifically for the scanning and vulnerability phase of
ethical hacking.
A network administrator who wishes to audit all the devices
on a specific IP scheme in a network can use NMAP. The admin can go ahead and
scan the ports to know exactly which ports are closed and which
are opened.
