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3 years ago

What is the purpose of using modulo 2 arithmetic rather than binary arithmetic in computing an fcs?

1 answer:

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When using modulo 2 arithmetic it is easy to implement and get the result. Any arithmetic process would work provided it applied the same way in the forward and reverse the process. Modulo 2 arithmetic is performed digit by digit on binary numbers. Each digit is considered independently from its neighbors, numbers are not carried or borrows.

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If the floating-point number representation on a certain system has a sign bit, a 3-bit exponent, and a 4-bit significand. What

vekshin1

Answer:

Normalization of storage is a typical method of storing the floating point number by shifting the decimal after the first figure of the number such as 1101.101 is normalized to 1.101101x23.

If the number that is in hovering point representation has 1 sign bit, 3-bit exponent with a 4-bit significant:

whenever the storage is normalized, then the biggest positive floating spot number in 2`s and the complement notation is 0.11112 x 23 = 111.12 =7.5

If the storage is returned to normal, then the minimum positive floating point number is 0.12 x 2-4 =0.000012 =1/32 = 0.03125.

Explanation:

Whenever the floating figure is keyed into the computer memory, then the first bit will be the sign bit, the next 8 bits are for exponent and 23 bits are used for storing significand. The array of exponents is from -127 to 128. While Exponent 127 stands for 0 and positive figures can be represented by values bigger than 127. The biggest floating point number will be represented as 0.111111.... 1111x 211111111

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4 years ago

. How do you find and remove files whose names contain embedded spaces? What would the Linux command(s) be?

zloy xaker [14]

Answer:

The Linux command is find.

Explanation:

The Linux command find suffices for finding and removing files whose names contain embedded spaces.

The command find supports tests of different kinds and predefined (and user-defined) actions in conjunction like that one looking for files with embedded spaces and then delete them.

We can achieve this using the following piece of code (as example):

find . -regex '.* +.*' -delete

The command find will look for files in the current working directory ( . ), execute the test -regex, to evaluate files in the current directory using the case-sensitive regular expression test (regex) (it could be also -iregex) that evaluates those files having names with one or more embedded spaces ( +) between zero or more characters before (.*) and after (.*) of these embedded space(s) ( +).

Look carefully that one or more embedded spaces is (are) represented in regular expressions using a space before the metacharacter (+), and characters are represented using the metacharacter (.) before (*), that is, (.*)

In other words, the quantifier (+) represents one or more occurrences (or matches) and quantifier metacharacter (*) zero or more times cases for that evaluation.

So, after testing all files available in the current directory with -regex test, find will execute the action -delete for all files matching the result of such an evaluation (and finally obtaining what we are looking for).

The command find has several other tests (-name, -iname, -ctime, and many more) that can be used with logical operators (-and, -or, -not), some predefined actions like -delete (aforementioned), -ls (list), -print and -quit, and also offers possibilities for user-defined actions, as mentioned before.

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3 years ago

What does it mean to design, implement, and maintain computer systems?

docker41 [41]

Answer:

Let's take an example of the embedded system, which is a perfect example of this question as a computer system. Suppose we want the embedded system to record the details related to soil of agricultural land. We will take an IoT device which will be a sensor that can register soil properties, and get connected to the computer system through the internet. And we design an embedded system that registers these values and then copy them like somewhere in DB space on Amazon cloud or Google cloud. And finally display on some LCD or a big projector, or whatever, and like we design. Thus we have designed, and now when we install this on agriculture land, we implement it, and since check regular for correct performance, we maintain this embedded or a mini-computer system as well. This is what design, implement and maintain computer systems mean.

Explanation:

Please check the answer section.

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3 years ago

Explanation historical development of computer

RUDIKE [14]

Answer:

Brief History Of Computer. The computer as we know it today had its beginning with a 19th century English mathematics professor name Charles Babbage. ... Other developments continued until in 1946 the first general– purpose digital computer, the Electronic Numerical Integrator and Computer (ENIAC) was built.

Explanation:

Computers and electronics play an enormous role in today's society, impacting everything from communication and medicine to science.

Although computers are typically viewed as a modern invention involving electronics, computing predates the use of electrical devices. The ancient abacus was perhaps the first digital computing device. Analog computing dates back several millennia as primitive computing devices were used as early as the ancient Greeks and Romans, the most known complex of which being the Antikythera mechanism. Later devices such as the castle clock (1206), slide rule (c. 1624) and Babbage's Difference Engine (1822) are other examples of early mechanical analog computers.

The introduction of electric power in the 19th century led to the rise of electrical and hybrid electro-mechanical devices to carry out both digital (Hollerith punch-card machine) and analog (Bush’s differential analyzer) calculation. Telephone switching came to be based on this technology, which led to the development of machines that we would recognize as early computers.

The presentation of the Edison Effect in 1885 provided the theoretical background for electronic devices. Originally in the form of vacuum tubes, electronic components were rapidly integrated into electric devices, revolutionizing radio and later television. It was in computers however, where the full impact of electronics was felt. Analog computers used to calculate ballistics were crucial to the outcome of World War II, and the Colossus and the ENIAC, the two earliest electronic digital computers, were developed during the war.

With the invention of solid-state electronics, the transistor and ultimately the integrated circuit, computers would become much smaller and eventually affordable for the average consumer. Today “computers” are present in nearly every aspect of everyday life, from watches to automobiles.

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3 years ago

Mary wants to create 3D shapes, refraction, and cloud patterns in an image. Which filter should Mary use?

Lapatulllka [165]

Answer:

D. artistic filter

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4 years ago