Complete Question:
Which of the following operating systems includes a virtual assistant?
Group of answer choices
a. macOS
b. Linux
c. UNIX
d. Chrome OS
Answer:
a. macOS
Explanation:
Macintosh refers to a set of computers designed, developed and manufactured by Apple Inc. Apple officially began the sales of Macintosh on the 24th of January, 1984. The first designs of Macintosh are considered to be personal computers and had a mouse, in-built screen with a graphical user interface (GUI). The operating system designed and developed for Apple computers (MacBook) is known as macOS (Macintosh operating system).
A virtual assistant can be defined as a computer software program that is artificially intelligent to understand human voice commands and performs task for the end user based on instructions or commands.
Generally, macOS is an operating system that includes a virtual assistant referred to as Siri. Siri was developed and released by Apple on the 4th of October, 2011.
<em>Siri as a virtual assistant, is able to perform tasks such as setting reminders, scheduling events, media player controls, GPS navigation, internet search, answer some questions etc. </em>
No, it is not necessary that variables that contain numbers should always be declared as integer or floating-point data types.
It is not necessary that variables that contain numbers should be declared as integer and floating point data types. Because number can be declared with different data types. As we know that data type is a vital aspect in programming. It describes the type of a value that is contained in a variable. It is the data type based on which memory is allocated to a number or any type of variables.
Numbers can be whole decimal/fractional, signed, unsigned, small, and long. Simply, they exist in a variety of values. According to their values range, the amount of memory is reserved.
Different programming languages offer different data types to store numbers, depending on their types and size. Let’s consider some examples of data types used in programming languages in order to declare variables holding numbers.
- In Python int, float, and complex are the data types used to declare number type variables.
- SQL uses INTEGER, SMALLINT , BIGINT , NUMERIC() , and DECIMAL() data types for numbers.
- To deal with number type variables, Java has six predefined data types, such as int, long, short, byte, float, and double.
- JavaScript uses a single data type called 'number' to declare numbers.
- In C++, two fundamental data types, int and float, are used to represent numeric variables. But C++ is not only limited to these two data types. The data type char can also store numbers. Other data types for declaring numbers as variables are derived from int, float and char, such as short int, long int, signed int, unsigned int, double, long double, signed char, unsigned char etc. etc.
So in concluding remarks, declaring a number type variable is not only limited to using integers and floating-points data types. Rather it entirely depends on the respective programming language, and size and type of the number to be stored in the variable.
You can learn more about data types at
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Scripting languages are unique computer languages because they automate task that could be done by human operator and are easy to use.
<h3>What is a scripting language?</h3>
Scripting languages are programming languages that is interpreted.
They are programming languages that automates the task that will originally be performed by a human operator.
Scripting languages are used to give instruction to other software to run accordingly to how you want it.
The scripting language is different form other language base on the fact that its interpreted . This means the code are translated to machine code when it is run.
The major advantage of scripting languages is that it is human readable and understandable.
Examples of scripting languages are Python and JavaScript.
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Answer:
The right answer is: Option A. h3
Explanation:
The purpose of using selectors in CSS is to find the elements in the HTML page to which the formatting will be applied.
Different type of selectors are used in CSS.
In the given code, h3 is the selector.
All the <h3> elements on the page will be of orange color and will have font size 12.
Hence,
The right answer is: Option A. h3
