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3 years ago

What US agency originally started ARPANET?

Computers and Technology

1 answer:

RUDIKE [14]3 years ago

8 0

<span>c. Department of Advanced Research Projects Agency</span>

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Three reasons why users attach speakers to their computers.

ZanzabumX [31]

Answer:

Iv'e answered this question 2 times already lol. The purpose of speakers is to produce audio output that can be heard by the listener. Speakers are transducers that convert electromagnetic waves into sound waves. The speakers receive audio input from a device such as a computer or an audio receiver.

Explanation: I hope this helps!

8 0

3 years ago

a password to a certain database consists of digits that cannot be repeated. if the password is known to consist of at least 8 d

BaLLatris [955]

Answer:

$\frac{10!}{2}mins$

Explanation:

12 seconds to try one combination will be equivalent to $\frac{1}{12}\times 60 = \frac{1}{5} \ mins$

Password contain at least 8 digit i.e. password can contain 8, 9, 10 digit.

Password cannot contain more than 10 digit because it will give room for repetition which it is clearly stated that digit cannot be repeated.

Possible digit that can be used: 9,8,7,6,5,4,3,2,1,0.

Total number of passwords combination possible for each position in 8 digit.

1st position = 10, 2nd position = 9, 3rd position = 8, 4th position = 7, 5th position = 6, 6th position = 5, 7th position = 4, 8th position = 3. Total number of passwords combination possible in 8 digit is equivalent to $\frac{10!}{2}$ .

Total number of passwords combination possible for each position in 9 digit.

1st position = 10, 2nd position = 9, 3rd position = 8, 4th position = 7, 5th position = 6, 6th position = 5, 7th position = 4, 8th position = 3, 9th position = 2. Total number of passwords combination possible in 9 digit is equivalent to $\frac{10!}{1}$ .

Total number of passwords combination possible for each position in 10 digit.

1st position = 10, 2nd position = 9, 3rd position = 8, 4th position = 7, 5th position = 6, 6th position = 5, 7th position = 4, 8th position = 3, 9th position = 2, 10th position = 1. Total number of passwords combination possible in 10 digit is equivalent to 10!.

Adding them up and multiplying by $\frac{1}{5} \ mins$ to get the total number of time needed to guarantee access to database = $[\frac{10!}{2}\times\ \frac{10!}{1} \times 10!] \frac{1}{5}\ mins = \frac{10!}{2}$

7 0

3 years ago

Gigano Mobiles, a smartphone manufacturer, is going to release its new flagship device next month. The Chief Executive Officer (

ser-zykov [4K]

Answer:

trhrt

Explanation:

rhshnbbfsfhnsdfbhddbh

7 0

3 years ago

Cho 1 biến x thuộc kiểu dữ liệu Integer , hãy cho biết biến x dùng để làm gì?

denis23 [38]

Answer:

???

Explanation:

4 0

2 years ago

I have a real struggle when it comes to working with strings, whether they're arrays or pointers to strings, and I'm lost cause

neonofarm [45]

In C, you deal with a string always via a pointer. The pointer by itself will not allocate memory for you, so you'll have to take care of that.

When you write char* s = "Hello world"; s will point to a "Hello world" buffer compiled into your code, called a string literal.

If you want to make a copy of that string, you'll have to provide a buffer, either through a char array or a malloc'ed bit of memory:

char myCopy[100];
strcpy(myCopy, s);

or

char *myCopy;
myCopy = (char*)malloc( strlen(s) + 1 );
strcpy(myCopy, s);

The malloc'ed memory will have to be returned to the runtime at some point, otherwise you have a memory leak. The char array will live on the stack, and will be automatically discarded.

Not sure what else to write here to help you...

6 0

3 years ago