Chelsea wants to know about the requirements for being a lab technician. Where could she find that information?

1. Name the first PC virus.<br> 2. In which language are viruses written for Microsoft programs?

Tju [1.3M]

Answer:

The first IBM PC virus in the "wild" was a boot sector virus dubbed (c)Brain, created in 1986 by Amjad Farooq Alvi and Basit Farooq Alvi in Lahore, Pakistan, reportedly to deter unauthorized copying of the software they had written. The first virus to specifically target Microsoft Windows, WinVir was discovered in April 1992, two years after the release of Windows 3.0.

Explanation:

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6 0

3 years ago

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Explain why using infrared telescopes would not be useful for stargazing in the city?

Alexeev081 [22]

Because infrared telescopes use infrared aka anything above absolute zero (0 degrees Celsius or 32 degrees Fahrenheit) meaning that the telescope would not only pick up the stars but also all of the people and lights so on and so forth

7 0

3 years ago

Which technology can allow a single ground-based telescope to achieve images as sharp as those from the Hubble Space Telescope?

Ganezh [65]

Answer:

The correct answer to the following question will be "Adaptive Optics".

Explanation:

AO (Adaptive Optics) is a technique used to enhance optical system performance by reducing the impact of incoming gravitational wave distortions by compressing a mirror to compensate for the distortion.
It operates by calculating and compensating for defects in a wave-front with a system that corrects these errors as a deformable mirror or even a liquid crystal collection.

It is a technique that can make it possible for a single ground-based telescope to get images as clear as that of the Hubble Space Telescope.

Certain methods can achieve power resolution that exceeds the limit set by atmospheric distortion, for example, Aperture synthesis, Lucky imaging, and Speckle imaging.

Therefore, Adaptive Optics is the right answer.

7 0

3 years ago

More registers appear to be a good thing, in terms of reducing the total number of memory accesses a program might require. Give

gulaghasi [49]

Answer:

Following is given the answer step by step:

Explanation:

First of all we will write a program using MARIE that will support the statement: Sum = (A + B) - (C + D). All the necessary comments are given in front of each statement:

Load A # variable A will be loaded

Add B # B will be added to A

Store Temp1 # A + B will be stored in Temp1

Load C # C will be loaded in memory

Add D # D will be added to C

Store Temp2 # C + D will ge stored in Temp2

Load Temp1 # Temp1 will be loaded in the memory

Subt Temp2 # Temp2(A + B) get subtracted from Temp1(A - B)

Store Sum # (A + B) - (C + D) will get stored in Sum.

We can see from above program that memory is accessed 9 times. While if C + D get executed first than memory accesses will be reduced to 7.

Above same program could be written using an architecture of 4 registers:

R1
R2
R3
R4

The program is as follows:

Load R1 , A #A will be loaded into R1

Load R2 , B # B will be loaded into R2

Add R1 , R2 # R2 gets added to R1 and the result is stored in R1 (A + B)

Load R3 , C # C loaded into R3

Load R4 , D # D loaded into R4

Add R3 , R4 # Value in R4 gets added into R3 and R3 becomes (C + D)

#no memory accesses required for this operation

Subt R1 , R4 #R4 (C + D) gets subtracted from R1 (A + B)

#no memory accesses required for this operation

Store Sum # The recent value will be stored into Sum

Here memory is accessed 5 times in total.

8 0

3 years ago

Answer: Internet service provider

Explanation:

5 0

3 years ago