Answer:
Implicit type casting means the type casting done by the compiler during compilation of program whereas Explicit type casting means the programmer explicitly type casts the variables. This is the difference implicit and explicit type casting.
Explanation:
Type casting means the conversion of one data type into another data type. There are two types of type casting. They are Implicit type casting and Explicit type casting.
<u>Implicit type casting:</u> The type casting which is done by the compiler during the compilation of a program. This occurs when we assigning smaller data type to larger data type and also both the data type are compatible. Below example clears the above concepts.
Ex: 
In the above example " i " is " int " data type whereas " l " is long data type but as we assigned the value of " i " to " l ". Here " int " and " long " are compatible data types and we assigned smaller data type ( int - i ) to larger data type ( long - l ) implicit type casting occurs.
<u>Explicit type casting:</u> The type casting which is done by the programmer explicitly to convert one data type into other data type. If we want to assign a value of larger data type to smaller data type explicit type casting is required. Below example clears the above concepts.
Ex: 
In the above example " d " is " double " data type whereas " l " is " long " data type. Here we are explicitly type casting to change larger data value ( double - d ) to smaller data value ( long - l ).
Answer:
Time to live.
Explanation:
The Time to Live is used for the purpose of the expiration table in the rows dynamically.The Time to live is represented in the time limit to stay in the database the Time to live It is no longer possible to fetch the data that has passed its closing timeout value also it is not displayed in the store metrics.
The Time to live is available on the host in the log informing the system how long the record will stay in the database after it has been generated or last modified.
Answer:WiFi or hotspots
Explanation:you will have to turn on your WiFi or hotspots on your smart phone and allow your friend to also turn his WiFi or hotspot after you will search for your WiFi and connect there he can use the internet
Networking components will eventually interact with computers and devices outside of itself. Whereas during system development you are only interacting with your program internally.
For example, when you first work on a website you can begin working on it on your personal computer not connected to the outside world. When you are done working on your website you will now upload it to a webserver (or you will create your webserver) and now you are opening up the doors so to speak to the Internet. When you "open the door" you need to make sure the proper security is in place so that no one hacks your site. This is ussually done by making sure the webserver you are on does not have any known security vulnerbilities and has the proper firewall settings to prevent unauthorized access.
e. uhmmm
19+21=30
like....
easy.
What grade class is this? I wanna do it cause it easy AFef
