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3 years ago

Why would we need to consider implementing our business blockchain application not on Bitcoin but Ethereum?

1 answer:

3 0

True or False
1. Phishing is the act of sending multiple emails to multiple users in hope of having
2. Spoofing is the act of obtaining unauthorized access to data from a computer
network.
3. Extortion is the act of using the internet to threaten or damage someone's
reputation to extort money or anything else of value.
4. In late 2014, LimeWire was raided for the second time due to years of pirating
movies, music, games, books and other software.
5. Electronic harassment is also referred to as cyberbullying.
6. Non-delivery of service is the act of devising a scheme wherein a culprit posts an
item or service for sale over the internet, and once the transactions have been done, does not
give the item or service.
7. Encryption is the process of converting raw to data code.
8. In piracy, trackers are used to identify IP addresses currently sharing a pirated
file.
9. Wager Gambling is the act of betting on any sports event over the internet.
10. Most email services today have spam or bulk folder that automatically puts
these suspicious emails to that folder.

You might be interested in

Add the following 2's complement binary numbers. Also express the answer in decimal. a. 01+ 1011b. 11+ 01010101c. 0101+ 110d. 01

kenny6666 [7]

Answer:

(a) 01 + 1011

Convert the two numbers into their 4-bit representation.

=> 01 = 0001

=> 1011

Addition of the two numbers (in their 2's complement form) gives the following:

0 0 0 1 ------------------> + 1 (in decimal)

1 0 1 1 ------------------> - 5 (in decimal)

1 1 0 0 -------------------> - 4 (in decimal)

Explanation for (a)

01 or 0001

Since the most significant bit is 0 (leftmost bit), it shows that it is a positive number. Therefore, it can be directly converted to its decimal representation as follows:

0001 = 0 x $2^{3}$ + 0 x $2^{2}$ + 0 x $2^{1}$ + 1 x $2^{0}$ = 1

0001 is + 1 in decimal.

1011

Its most significant bit(MSB) is 1 showing that it is negative.

Flipping all its bits and adding 1 to the result, will convert it to it's positive counterpart.

i.e 1011 => 0100 + 1 = 0101.

Converting the result (0101) to decimal gives

0101 = 0 x $2^{3}$ + 1 x $2^{2}$ + 0 x $2^{1}$ + 1 x $2^{0}$ = 5

1011 is -5 in decimal

01 + 1011 or 0001+ 1011 = 1100

The result (1100), of the addition of the two numbers, is a negative number as the MSB is 1.

Convert it to it's positive counterpart.

i.e 1100 => 0011 + 1 = 0100.

Converting the result (0100) to decimal gives

0100 = 0 x $2^{3}$ + 1 x $2^{2}$ + 0 x $2^{1}$ + 0 x $2^{0}$ = 4

Therefore, the result, 1100 is -4 in decimal.

===================================================

(b) 11 + 01010101

Convert the two numbers into their 8-bit representation since one of them is in 8-bit.

PS: Taking 11, its MSB is 1 showing that it is a negative number. Also, it's 8-bit representation will mean pre-padding it with ones(1s) rather than zeros as follows. In other words, pre-padding a 2's complement number is done using its sign bit.

=> 11 = 11111111

=> 01010101

Addition of the two numbers (in their 2's complement form) gives the following:

1 1 1 1 1 1 1 1 ------------------> - 1 (in decimal)

0 1 0 1 0 1 0 1 ------------------> + 85 (in decimal)

1 0 1 0 1 0 1 0 0 -------------------> + 84 (in decimal)

Discard the carry-out bit (1) making the result 01010100

Explanation for (b)

11 or 11111111

Its MSB is 1 showing that it is negative.

Convert it to it's positive counterpart.

11111111 => 00000000 + 1 = 00000001

Converting the result (00000001) to decimal gives 1

11 or 11111111 is - 1 in decimal.

01010101

Its MSB is 0 showing that it is also positive. Now, convert to decimal

01010101 = 85

01010101 is + 85 in decimal.

11111111 + 01010101 = 01010100

The result (01010100), is also positive as the MSB is 0. Now, convert to decimal.

01010100 = 84

Therefore the result (01010100) is + 84 in decimal.

===================================================

Convert the two numbers into their 4-bit representations.

=> 0101 = 0101

=> 110 = 1110

Addition of the two numbers (in their 2's complement form) gives the following:

0 1 0 1 ------------------> + 5 (in decimal)

1 1 1 0 -----------------> - 2 (in decimal)

1 0 0 1 1 -------------------> + 3 (in decimal)

Dicard the carry-out bit (leftmost bit) to get 0011 as result.

Explanation for (c)

0101

Since the MSB is 0 (leftmost bit), it shows that it is a positive number. Now, convert to decimal.

0101 = 5

0101 is +5 in decimal.

110 or 1110

Its MSB is 1 showing that it is negative.

Convert it to it's positive counterpart.

i.e 1110 => 0001 + 1 = 0010.

Converting the result (0010) to decimal gives

0010 = 2

1110 is -2 in decimal

0101 + 110 = 0101+ 1110 = 0011

The result (0011), is a positive number as the MSB is 0.

Converting the result (0011) to decimal gives

0011 = 3

Therefore, the result, 0011 is 3 in decimal.

===================================================

(d) 01 + 10

Convert the two numbers into their 4-bit representation.

=> 01 = 0001

=> 10 = 1110

Addition of the two numbers (in their 2's complement form) gives the following:

0 0 0 1 ------------------> + 1 (in decimal)

1 1 1 0 ------------------> - 2 (in decimal)

1 1 1 1 -------------------> - 1 (in decimal)

Explanation for (d)

01 or 0001

Since the MSB is 0 (leftmost bit), it shows that it is a positive number. Now convert to decimal.

0001 = 1

0001 is + 1 in decimal.

1110

Its MSB is 1 showing that it is negative.

Convert it to it's positive counterpart.

i.e 1110 => 0001 + 1 = 0010.

Converting the result (0010) to decimal gives

0010 = 2

1110 is -2 in decimal

01 + 1011 or 0001+ 1110 = 1111

The result (1111), is a negative number as the MSB is 1.

Convert it to it's positive counterpart.

i.e 1111 => 0000 + 1 = 0001.

Converting the result (0001) to decimal gives

0001 = 1

Therefore, the result, 1111 is -1 in decimal.

7 0

4 years ago

1. Which mechanical part or feature listed in the section on Critical Vehicle Systems do you think is most important?

kaheart [24]

I think it would be seatbelt but is it a multiple choice if so what's the choices

3 0

4 years ago

Read 2 more answers

What information is used in a communication between two system

xz_007 [3.2K]

Answer:

IPv4 address. I guess, it's kind of tricky. lol

6 0

3 years ago

Which of the following class definition defines a legal abstract class Group of answer choices public class Rectangle abstract {

valkas [14]

<h2>Question</h2>

Which of the following class definition defines a legal abstract class Group of answer choices

(a)

public class Rectangle abstract {

public abstract double findArea ( );

}

(b)

public abstract class Rectangle {

public abstract double findArea ( );

}

(c)

public class Rectangle {

public abstract double findArea ( );

}

(d)

public class abstract Rectangle {

public abstract double findArea ( );

}

<h2>Answer:</h2>

(b)

public abstract class Rectangle {

public abstract double findArea ( );

}

<h2>Explanation:</h2>

When a class is declared with the abstract keyword, the class is called an abstract class. Abstract classes cannot be instantiated and may include one or more abstract methods. If a class contains an abstract method, then it (the class) must be declared abstract.

In Java, abstract classes are defined using the following format:

[access_modifier] abstract class [name_of_class]

[access_modifier] specifies the access modifier of the class which could be public, private, e.t.c

abstract is the keyword that specifies that the class is an abstract class.

class is a keyword used for defining classes

name_of_class specifies the name of the class.

The only option that fulfils this format is option b where;

(i) The access modifier is public

(ii) The name of the class is Rectangle

Option a is not correct because the abstract keyword is supposed to come before the class keyword.

Option c is not correct because the keyword abstract is missing. In other words, the class must be declared abstract since it contains abstract method findArea();

Option d is not correct because the abstract keyword is supposed to come before the class keyword.

7 0

3 years ago

A slide in Blake's presentation contained the following information:

deff fn [24]

Answer:

consistent phrasing is missing

Explanation:

If you will note carefully, the bullets are not in correct format. The model is missing. The correct one is as below.

Risks

The correct form of presentation is as below:

1. Risks

a. employees

a. physical illness

b. mental illness

c. death

2. Customers

a. complaints

b. downtime

3. Benefits

However, the content seems to be complete now, and hence not anything else is required. And since its not something very tough to decide to go with, bite the bullet is certainly not an issue.

3 0

3 years ago