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2 years ago

How has the perception of the hacker changed over recent years? What is the profile of a hacker today?

Computers and Technology

1 answer:

finlep [7]2 years ago

4 0

Answer:

Hackers frequently spend long hours examining the types and structures of targeted systems because they must use guile, or fraud to bypass the controls placed on information owned by someone else.

Explanation

The perception of a hacker has evolved over the years.

The traditional hacker profile was a male, aged 14 to 18.
76% of hackers are men whose ages are between 14 years (8%) to 50 (11%). The average age is 35 years (43%).
A hacker is persevering, patient, creative, bright and having a passion for what he does.
Hackers today can be expert or novices.
The experts create the software and schemes to attack computer systems.
While the novices merely use software created by the experts.

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Multiple boolean expressions can be combined by using a logical operator to create ________ expressions.

Licemer1 [7]

<span>Boolean expressions can be combined by using a logical operator to create compound expressions. A boolean expression is an expression that takes into account and evaluates specific data, which is in the form of true and/or false. A compound expression is merely a statement of expressions.</span>

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1 year ago

What is the argument in this function =AVERAGE(F3:F26)

monitta

The argument for the function would be answer "D".

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1 year ago

Assume that two parallel arrays have been declared and initialized: healthOption an array of type char that contains letter code

eduard

Since we have to check the first two options only as mentioned in last part of question the loop will work 2 times only and will compare the cost of first element and second and assign the healthoption accordingly

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

if(annualCost[i]<annualCost[i+1]

best2 = healthOption[i]

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1 year ago

Which of the following code is correct? I: print("Programming is fun") print("Python") print("Computer Science") II: print("Prog

vfiekz [6]

Answer:

None of the options is correct.

Explanation:

One of the simplest statements that you can write in Python is a print statement, which causes a message to be displayed on the screen. For example, the following statement causes the message Python programming is fun! to be displayed:

print 'Python programming is fun!'

Notice that after the word print, the Python programming is fun! was written inside a set of single-quote marks. The quote marks are necessary, but they will not be displayed. They simply mark the beginning and the end of the text that we wish to display.

Here is an example of how you would type this print statement at the interpreter’s

prompt:

>>> print 'Python programming is fun!'

After typing the statement you press the Enter key and the Python interpreter executes the statement, as shown here:

>>> print 'Python programming is fun!'

Python programming is fun!

>>>

Thus, the correct way to write the codes in the question is:

print 'Programming is fun'

print 'Python'

print 'Computer Science'

3 0

2 years ago

A common fallacy is to use MIPS (millions of instructions per second) to compare the performance of two different processors, an

yulyashka [42]

The question is incomplete. It can be found in search engines. However, kindly find the complete question below:

Question

Cites as a pitfall the utilization of a subset of the performance equation as a performance metric. To illustrate this, consider the following two processors. P1 has a clock rate of 4 GHz, average CPI of 0.9, and requires the execution of 5.0E9 instructions. P2 has a clock rate of 3 GHz, an average CPI of 0.75, and requires the execution of 1.0E9 instructions. 1. One usual fallacy is to consider the computer with the largest clock rate as having the largest performance. Check if this is true for P1 and P2. 2. Another fallacy is to consider that the processor executing the largest number of instructions will need a larger CPU time. Considering that processor P1 is executing a sequence of 1.0E9 instructions and that the CPI of processors P1 and P2 do not change, determine the number of instructions that P2 can execute in the same time that P1 needs to execute 1.0E9 instructions. 3. A common fallacy is to use MIPS (millions of instructions per second) to compare the performance of two different processors, and consider that the processor with the largest MIPS has the largest performance. Check if this is true for P1 and P2. 4. Another common performance figure is MFLOPS (millions of floating-point operations per second), defined as MFLOPS = No. FP operations / (execution time x 1E6) but this figure has the same problems as MIPS. Assume that 40% of the instructions executed on both P1 and P2 are floating-point instructions. Find the MFLOPS figures for the programs.

Answer:

(1) We will use the formula:

CPU time = number of instructions x CPI / Clock rate

So, using the 1 Ghz = 10⁹ Hz, we get that

CPU time₁ = 5 x 10⁹ x 0.9 / 4 Gh

= 4.5 x 10⁹ / 4 x 10⁹Hz = 1.125 s

and,

CPU time₂ = 1 x 10⁹ x 0.75 / 3 Ghz

= 0.75 x 10⁹ / 3 x 10⁹ Hz = 0.25 s

So, P2 is actually a lot faster than P1 since CPU₂ is less than CPU₁

(2)

Find the CPU time of P1 using (*)

CPU time₁ = 10⁹ x 0.9 / 4 Ghz

= 0.9 x 10⁹ / 4 x 10⁹ Hz = 0.225 s

So, we need to find the number of instructions₂ such that CPU time₂ = 0.225 s. This means that using (*) along with clock rate₂ = 3 Ghz and CPI₂ = 0.75

Therefore, numbers of instruction₂ x 0.75 / 3 Ghz = 0.225 s

Hence, numbers of instructions₂ = 0.225 x 3 x 10⁹ / 0.75 = 9 x 10⁸

So, P1 can process more instructions than P2 in the same period of time.

(3)

We recall that:

MIPS = Clock rate / CPI X 10⁶

So, MIPS₁ = 4GHZ / 0.9 X 10⁶ = 4 X 10⁹HZ / 0.9 X 10⁶ = 4444

MIPS₂ = 3GHZ / 0.75 X 10⁶ = 3 x 10⁹ / 0.75 X 10⁶ = 4000

So, P1 has the bigger MIPS

(4)

We now recall that:

MFLOPS = FLOPS Instructions / time x 10⁶

= 0.4 x instructions / time x 10⁶ = 0.4 MIPS

Therefore,

MFLOPS₁ = 1777.6

MFLOPS₂ = 1600

Again, P1 has the bigger MFLOPS

3 0

1 year ago