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3 years ago

What three conditions must be satisfied in order to solve the critical section problem?

Computers and Technology

1 answer:

bonufazy [111]3 years ago

3 0

Answer:

Explanation:

The critical section problem revolves around trying to ensure that at most one process is executing its critical section at a given time. In order to do so, the three following conditions must be met.

First, no thread may be executing in its critical section if there is already a current thread executing in its critical section.

Second, only the specific threads that are not currently occupied executing in their critical sections are allowed to participate in deciding which process will enter its critical section next.

Third, a preset limit must exist on the number of times that other threads are allowed to enter their critical state after a thread has made a request to enter its critical state.

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The monkey-and-bananas problem is faced by a monkey in a laboratory with some bananas hanging out of reach from the ceiling. A b

elixir [45]

Answer:

a) initial state description

At(Monkey, A) ∧ At(Bananas, B) ∧ At(Box, C) ∧

Height(Monkey, Low) ∧ Height (Box, Low) ∧

Height (Bananas, High) ∧ Push(Box) ∧ ClimbUp(Box)

b) the six action schemas.

1 - Go from one place to another

Action (Go(x, y),

PRECONDITION: At (Monkey, x)

EFFECT: At (Monkey, y) ∧¬At(Monkey, x))

2 - Push an object from one place to another

Action (Push(b, x, y),

PRECONDITION: At (Monkey, x) ∧ Can Push(b)

EFFECT: At(b, y) ∧ At (Monkey, y) ∧¬At(b, x) ∧¬At(Monkey, x))

3 - Climb up unto an object

Action (ClimbUp(b),

PRECONDITION: At(b, x) ∧ At(Monkey, x) ∧ ClimbUp(b)

EFFECT: On (Monkey, b) ∧¬Height (Monkey, High))

4 - ClimbDown from an object

Action (ClimbDown (b),

PRECONDITION: On (Monkey, b) ∧ Height (Monkey, High)

EFFECT: ¬On (Monkey, b) ∧¬Height (Monkey, High) ∧ Height(Monkey, Low))

5 - Grasp an object

Action (Grasp (object, position, height),

PRECONDITION: Height(Monkey, h) ∧ Height(b, h) ∧ At(Monkey, x) ∧ At(b, x)

EFFECT: Has(Monkey, b))

6 - Ungrasp an object

Action (Ungrasp(b),

PRECONDITION: Have(Monkey, b)

EFFECT: Has(Monkey, object))

c) general goal state.

Has(Monkey, Bananas, s) ∧ (ЗхAt(Box, x, s₁) ∧ At(Box, x, s))

STRIPS only consider about goal state, there is no relation between two states within the plan, so there is no way to represent this goal.

6 0

4 years ago

A user clicked an email link that led to a website than infected the workstation with a virus. The virus encrypted all the netwo

Leno4ka [110]

Answer:

Explanation:

A zero-day vulnerability is a computer-software vulnerability that is unknown to those who would be interested in mitigating the vulnerability. Until the vulnerability is mitigated, hackers can exploit it to adversely affect computer programs, data, additional computers or a network. An exploit directed at a zero-day vulnerability is called a zero-day exploit, or zero-day attack.

5 0

3 years ago

Whether you work in m-commerce, e-commerce, or brick-and-mortar commerce, to be successful you will need to be able to think cri

svlad2 [7]

Answer:

The answer is "Option c"

Explanation:

Decisions made in secret have always been critical. Hence the want to express it before your choice is made. It is all about how you express choice. In general, they need your presentation to explain the choice that you decided, how they created it, and how it implies for just the group, that you are approaching, and wrong choices can be described as follows:

In option a, It is used in the industry to interest.
In option b, It is use in communication mechanism.
In option d, It enables people to handle our activities or carry them out.

3 0

3 years ago

Create a Python program that asks the user in which direction to go? north, South East, or West?

QveST [7]

Answer:

huh

Explanation:

adsfghjkhgfdghjfghjkl

7 0

3 years ago

Display all the natural numbers from 1 to 100 that are exactly divisible by 3 and 7 using FOR … NEXT. Without using Mod

Tcecarenko [31]

Answer:

FOR i% = 1 TO 100

IF ((i%\3) = i%/3) AND ((i%\7) = i%/7) THEN

PRINT i%

END IF

NEXT i%

Explanation:

Of course using MOD would be cleaner, but another way to check if a number is integer divisable is to compare the outcome of an integer division to the outcome of a floating-point division. If they are equal, the division is an integer division.

The program outputs:

6 0

3 years ago