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2 years ago

CAPTCHAs can be used as a form of signature to create a valid contract in e-commerce. True False

2 answers:

5 0

It’s true but everybody knows how annoying CAPTCHA can be. Besides, it fails to work very often. So, you can loose your clients in this way. As a webmaster I recommend to use spam protection that would be invisible for visitors. For instance, https://cleantalk.org/ uses simple plugins for the most popular CMS such as WordPress spam protection plugin, Joomla, Drupal and other plugins. In this way visitors will be more loyal and not annoyed guessing characters or puzzles.

Len [333]2 years ago

4 0

Thank you for posting your question here at brainly. I hope the answer will help you. Feel free to ask more questions.
The statement "CAPTCHAs can be used as a form of signature to create a valid contract in e-commerce. " is true. It is <span>a program or system intended to distinguish human from machine input, typically as a way of thwarting spam and automated extraction of data from websites.</span>

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Write a function that implements another stack function, peek. Peek returns the value of the first element on the stack without

devlian [24]

Answer:

See explaination

Explanation:

StackExample.java

public class StackExample<T> {

private final static int DEFAULT_CAPACITY = 100;

private int top;

private T[] stack = (T[])(new Object[DEFAULT_CAPACITY]);

/**

* Returns a reference to the element at the top of this stack.

* The element is not removed from the stack.

* atreturn element on top of stack

* atthrows EmptyCollectionException if stack is empty

public T peek() throws EmptyCollectionException

{

if (isEmpty())

throw new EmptyCollectionException("stack");

return stack[top-1];

}

/**

* Returns true if this stack is empty and false otherwise.

* atreturn true if this stack is empty

public boolean isEmpty()

{

return top < 0;

}

//please replace "at" with the at symbol

Note:

peek() method will always pick the first element from stack. While calling peek() method when stack is empty then it will throw stack underflow error. Since peek() method will always look for first element ffrom stack there is no chance for overflow of stack. So overflow error checking is not required. In above program we handled underflow error in peek() method by checking whether stack is an empty or not.

3 0

2 years ago

Consider the following skeletal C program: void fun1(void); /* prototype */ void fun2(void); /* prototype */ void fun3(void); /*

natita [175]

Answer:

Check the explanation

Explanation:

a) main calls fun1; fun1 calls fun2; fun2 calls fun3

fun3() d, e, f

fun2() c, d, e

fun1() b, c, d

main() a, b,c

CALL STACK SHOWING THE VARIABLES OF EVERY FUNCTION

From the above call stack diagram, it is very clear that the last function call is made to fun3().

In fun3(), the local variables "d, e, f" of fun3() will be visible

variable "c" of fun2() will be visible

variable "b" of fun1() will be visible

variable "a" of main() will be visible

b) main calls fun1; fun1 calls fun3

fun3() d, e, f

fun1() b, c, d

main() a, b,c

CALL STACK SHOWING THE VARIABLES OF EVERY FUNCTION

From the above call stack diagram, it is very clear that the last function call is made to fun3().

In fun3(), the local variables "d, e, f" of fun3() will be visible

variable "b, c" of fun1() will be visible

variable "a" of main() will be visible

c) main calls fun2; fun2 calls fun3; fun3 calls fun1

fun1() b, c, d

fun3() d, e, f

fun2() c, d, e

main() a, b,c

CALL STACK SHOWING THE VARIABLES OF EVERY FUNCTION

From the above call stack diagram, it is very clear that the last function call is made to fun1().

In fun1(), the local variables "b, c, d" of fun1() will be visible

variable "e, f" of fun3() will be visible

variable "a" of main() will be visible

d) main calls fun1; fun1 calls fun3; fun3 calls fun2

fun2() c, d, e

fun3() d, e, f

fun1() b, c, d,

main() a, b,c

CALL STACK SHOWING THE VARIABLES OF EVERY FUNCTION

From the above call stack diagram, it is very clear that the last function call is made to fun2().

In fun2(), the local variables "c, d, e" of fun2() will be visible

variable "f" of fun3() will be visible

variable "b" of fun1() will be visible

variable "a" of main() will be visible

The last function called will comprise of all its local variables and the variables other than its local variables from all its preceding function calls till the main function.

8 0

1 year ago

An administrator has been working within an organization for over 10 years. He has moved between different IT divisions within t

rodikova [14]

Answer:

User roles and access authorization

(Explanation of this question is given below in the explanation section.

Explanation:

As noted in question that a terminated employee comeback in office and installed some malicious script on a computer that was scheduled to run a logic bomb on the first day of the following month. And, that script will change administrator passwords, delete files, and shut down over 100 servers in the data center.

The following problem can be with that account

Unauthorized user access and privileges

The user may be given unauthorized access to system resources. If a user has unauthorized access to system resource then he can modify or destroy the system function easily.

The firewall may be disabled to detect the malicious script

The firewall should be enabled to detect such types of attack from unauthorized access to the system

Role

May be user role is not defined properly. If role would be defined according to user role then there are very fewer chances in doing unauthorized changes in the system that will result in an unexpected outage.

5 0

2 years ago

Constantine forms the following hypothesis. Let n be any non-negative number that meets the following condition: when n is divid

notka56 [123]

Answer:

n=5

Explanation:

if n= 5

i. n/5=5/5=1 so it divides completely the remainder is 0

ii. 97 - 6(5) = 97 - 30 = 67, 67 is a prime number.

8 0

2 years ago

Sharon is thinking about opening a bakery. She knows she wants to set her own hours, reduce her stress and make a profit. But sh

hodyreva [135]

Please provide complete details.

4 0

2 years ago