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2 years ago

Compare and contrast hardware and software.

Computers and Technology

2 answers:

CaHeK987 [17]2 years ago

8 0

Answer:

DIFFERENCES BETWEEN HARDWARE AND SOFTWARE

Hardware

Hardware is Tangible.
Hardware cannot be infected by viruses.
Hardware has monitors, hard drives, USB and etc.
If hardware gets damaged it can be replaced.
They are mostly made using electronic materials.

Software

Software is non-tangible.
Software can be infected by viruses.
It consists of applications and system software.
It is usually developed using a programming language.
It can be affected by bugs.

lesya692 [45]2 years ago

7 0

Hardware:
-physical parts of a computer that cause processing of data
-can be connected (physically) & can touch
- Hardware wares out during/over time
-Hardware failure is random
Software:
-A set of construction that tells a computer exactly what to do
-software is logical in nature
- dose not have an increasing failure rate

Similarities
- Behavior; Users interact with the products in various ways

- Products produce outputs and given inputs

-they have functional (user facing) and non functional (non user facing) requirements

-They are both complex (any representation of product specifications lead to a main structure)

Differences
- Software is easier to change then hardware

- Software testing is done by specialized quality assurance (QA) engineers, while hardware is done by engineers who are creating the product

-Hardware must be designed and tested to work over a range of time and environmental conditions, which is not the case for software

- Hardware designs are constrained by the need to incorporate standard parts

(Hope this helps?)

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In 4-bit two's complement representation, what is the binary encoding of the number -5?

Katena32 [7]

Answer:

a) 1011

Explanation:

In 4 bit two's complement representation, the first bit is the sign bit.

If the sign bit is 1, the number is negative.

If the sign bit is 0, the number is positive.

What is the magnitude of the sign bit?

In n-bit two's complement representation, the magnitude of the sign bit is:

$2^{n-1}-1$

So, in 4-bit two's complement representation, the magnitude of the sign bit is:

$2^{4-1}-1 = 8$

Since the number is negative, the value of this bit is -8.

The other bits are magnitude bits, positive.

We have that the sum of these bits must be -5, and we already have -8. So what should be the value of these last 3 bits?

First, i am going to solve this equation to find the decimal value of the last three bits.

$-5 = -8 + x$

$x = 3$

So, the last three bits are:

$3_{10} = (011)_{2}$

The binary encoding of the number -5 is:

a) 1011

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3 years ago

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Nady [450]

True .................

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If you were looking for a record in a very large database and you knew the ID number, which of the following commands would be t

OLga [1]

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The Correct answer is Find.

Explanation:

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3 years ago

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Adding to the one above,
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3 years ago

g Boolean Algebraic properties _____. a. are used to make boolean expressions more complicated b. are used to convert a Boolean

vesna_86 [32]

Answer:

c. can lead to a simpler expression and thus a simpler circuit.

Explanation:

Boolean logic refers to a theory of mathematics developed by the prominent British mathematician, called George Boole. In Boolean logic, all variables are either true or false and are denoted by the number "1" or "0" respectively; True = 1 or False = 0.

Also, Boolean logic allow users to combine keywords with Boolean operators (quotes, AND, OR, near/n) to give a more personalized and relevant search results.

There are five (5) main Boolean Algebraic properties and these includes;

I. Commutative property: it applies to both multiplication and addition.

For addition; A + B = B + A
For multiplication; A.B = B.A

II. Associative property: it applies to both multiplication and addition.

For addition; A + (B + C) = (A + B) + C
For multiplication; A(BC) = (AB)C

III. Distributive property: it is formed using the product of a sum.

A(B + C) = AB + AC

IV. Complement property: it involves a variable and its complement.

For addition: A + A' = 1
For multiplication; A.A' = 0

V. Identity property:

For addition; A + 0 = A
For multiplication; A.1 = A

In digital electronics, Boolean expressions are used to represent circuits which comprises of Boolean operations and as such simplifying any logic expression without changing or altering any of it's functionalities and properties based on given operations or variables.

Hence, Boolean Algebraic properties can lead to a simpler expression and thus a simpler circuit.

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2 years ago