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3 years ago

Choose the correct statement about the UNIX family of operating systems:

Computers and Technology

1 answer:

Novosadov [1.4K]3 years ago

5 0

Answer:

The Answer is-

A. Because files can be shared across fork() and exec() calls, I/O redirection can be done via files

Explanation:

When the Unix OS calls the fork then process in the parent can wait and exec() in the child process.
Unix shell provides Input/Output direction to the calls between the fork() and exec().
exec() can restore the current program process.
fork() clones the current process data and then open the file content.

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A ____ attack is much more substantial than a DoS attack because of the use of multiple systems to simultaneously attack a singl

victus00 [196]

Answer: (D) Distributed denial- of- service (DDoS)

Explanation:

The distributed denial of service attack is one of the type of attack that occur when the multiple system are basically flooded with the resources and the bandwidth.

Botnet is one of the example of DDoS as it caused the DOS (denial of service) for the users.
This type of attack is more substantial as compared to the DoS attack as they use the multiple system for attack the single target simultaneously.

Therefore, Option (D) is correct.

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4 years ago

Tom's Art Supplies used to sell art supplies through mail order catalogs, but the company's order takers often had difficulty de

olganol [36]

The answer is:bbbbbbbb

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3 years ago

should variables that contain numbers always be declared as integer or floating-point data types? why or why not? name potential

Stells [14]

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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6 0

2 years ago

What are two type of physicals connection

netineya [11]

Two types of physical connection are:

A wired connection using a cable

A wireless connection using radio waves

7 0

4 years ago

What happens when the programmer tries to access an array cell whose index is greater than or equal to its logical size?

just olya [345]

Answer:

When a programmer tries to access an item in an array cell whose index is greater than or equal to the array's logical size, this data element or item is garbage. This means that currently, the item is not the part of the program's useful data. Garbage contains objects or data which will not be used by a program running on it. So the value returned could be either of the two:

Value would be an arbitrary or random number if it is an array of numbers. Arbitrary means that the value is not predefined or specified in advance.
Value returned would be null if it is an array of objects.

3 0

3 years ago