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Soloha48 [4]
3 years ago
11

Critical Thinking Questions Case 7-1 ​ You recently started working part-time in a retail store, and are learning about the read

ing devices your store uses. Your store uses a bar code reader to process items during checkout. What type of technology does the bar code reader use?
Computers and Technology
1 answer:
DerKrebs [107]3 years ago
6 0

Answer: Laser Beams

Explanation:

  The laser beam is one of the type of technology that helps in amplifying the light by using the laser principle Stimulated emission in the laser. The word "LASER" is stand for the Light amplification by stimulated emission of radiation.  

The laser is one of the device that emitted the coherent light in the form of beam rays that is propagate only in one direction. The following are the laser beam technology are as follows:

  • Bar code reader
  • Laser surface modification  
  • Information processing
  • Laser range  

Therefore, Laser beam is the correct answer.

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The L-exclusion problem is a variant of the starvation-free mutual exclusion problem. We make two changes: as many as L threads
vladimir2022 [97]

Answer:

The solution is as follows.

class LFilters implements Lock {

int[] lvl;

int[] vic;

public LFilters(int n, int l) {

lvl = new int[max(n-l+1,0)];

vic = new int[max(n-l+1,0)];

for (int i = 0; i < n-l+1; i++) {

lvl[i] = 0;

}

}

public void lock() {

int me = ThreadID.get();

for (int i = 1; i < n-l+1; i++) { // attempt level i

lvl[me] = i;

vic[i] = me;

// rotate while conflicts exist

int above = l+1;

while (above > l && vic[i] == me) {

above = 0;

for (int k = 0; k < n; k++) {

if (lvl[k] >= i) above++;

}

}

}

}

public void unlock() {

int me = ThreadID.get();

lvl[me] = 0;

}

}

Explanation:

The code is presented above in which the a class is formed which has two variables, lvl and vic. It performs the operation of lock as indicated above.

6 0
3 years ago
A ________ is an input device that responds to finger touch.
AURORKA [14]

1 - 3 21 - 3 21 - 3 21 - 3 21 - 3 21 - 3 21 - 3 21 - 3 21 - 3 21 - 3 21 - 3 21 - 3 21 - 3 21 - 3 2

6 0
3 years ago
Read 2 more answers
Please help!! thank you so much!! &lt;3
Zepler [3.9K]

Answer:

D. 4x as much

Explanation:

The answer is pretty simple. The question is asking about 10m/s and 20m/s right? Take a look at the energy at each point on the graph. At 10m/s the kinetic energy is 100 on the graph. At 20m/s the kinetic energy is 400. You'll notice that 100 x 4 is 400 - That's the answer.

You can also prove this mathematically. The formula for kinetic energy is

\frac{1}{2}mv^2

The question says: constant mass so we can ignore that for now.

(1/2) * 10^2 is (1/2) * 100 = 50

for the 20m/s ball it would be

(1/2) * 20^2 = 400 * 1/2 = 200

Once again, you see that it is 4x

3 0
3 years ago
Read 2 more answers
This exspansion slot essentially replaced PCI and AGP slots
MrRa [10]
PCI and AGP slots have been replaced with PCI-E slot (PCI-Express). There are different types of PCI-E buses:

PCI Express 1x (250 [500] * MB/s)
PCI Express 2x (500 [1000] * MB/s)
PCI Express 4x (1000 [2000] * MB/s)
PCI Express 8x (2000 [4000] * MB/s)
PCI Express 16x (4000 [8000] * MB/s)
<span>PCI Express 32x (8000 [16000] * MB/s)

I hope that's what you meant :)</span>
4 0
3 years ago
An intruder with malicious intent breaks into an office and steals a hard drive
kakasveta [241]

Answer: data security

Explanation:

The company's authentication protocols and data encryption measures denotes data security.

Data security simply means protecting unauthorized people from having access to a particular data. This is done to prevent unauthorized access of important information or to prevent fraud. Some of the data security measures include data encryption, tokenization, hashing, etc.

4 0
3 years ago
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