suppose you have to implement an operating system on hardware that supports interrupts and exceptions but does not have an explicit trap (syscall) instruction. Can you devise a satisfactory substitute for traps using interrupts and/or exceptions? If so, explain how. If not, explain why. (In this context, the trap instruction is the instruction used by a user-level process to invoke a system call in the operating system, i.e., the trap instruction is the system call instruction

Answers

Answer 1

Answer:

A trap is nothing but an exception that is caused by an abnormal condition. It is also used to invoke a system call or kernel routine because this has a higher priority than the user’s code. An interrupt is a response generated by the hardware which will occur at random times during the execution of the program. However, we cannot devise a substitute for traps using interrupts and exceptions because of the following reasons:

1. The interrupts are asynchronous whereas the exceptions and the traps are said to be synchronous.

2. The traps and exceptions can be manipulated or called whenever required whereas interrupts occur mostly at unwanted and random times.

To stop a process from happening, Ctrl + C is also done which is a user-defined interrupt in DOS operating systems

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Write an Enlistee class that keeps data attributes for the following pieces of information: • Enlistee name • Enlistee number Next, write a class named Private that is a subclass of the Enlistee class. The Private class should keep data attributes for the following information: • Platoon number (an integer, such as 1, 2, or 3) • Years of service (also an integer)

In the glare of the sun, it is hard to see and be seen. Name six precautions

Answers

In the glare of the sun, it is hard to see and be seen. Some precautions would be :
1) Have a polarized sunglasses ready, they can help reduce glare.
2) Use your sun visor – it can help to block out the sun.
3) Leave more following space between you and the next vehicle.
4) Drive with your headlights on to increase your visibility to other drivers.
5) Keep your windshield clean, inside and out, avoid storing papers or
other items on the dashboard.
6) If having a difficult time seeing the road, use the lane markings to help
guide you.

Which Numpy function do you use to create an array? (Points : 1) npnp.array
np.numpy
numpy

Answers

Answer:

The correct option is np.array

Explanation:

Numpy is a library to perform numerical calculation in python. It allows us to create and modify vectors, and make operations on them easily. Numpy arrays are an excellent alternative to python lists. Some of the key advantages of numpy arrays are that they are fast, easy to work with, and offer users the opportunity to perform calculations through full arrays.

To start using numpy, the library must be imported:

import numpy as np

The most common way to create a vector or matrix already initialized is with the np.array function, which takes a list (or list of lists) as a parameter and returns a numpy matrix. The numpy arrays are static and homogeneous typing. They are more efficient in the use of memory.

Example:

list = [25,12,15,66,12.5]

v = np.array (list)

print (v)

In the context of computer and network security, availability means a quick recovery in the event of a system failure or disaster.a. True
b. False

Answers

Answer:

True

Explanation:

Given the acquisition environment and circumstances described in the BSVD Program documents, do you recommend contracting without providing for full and open competition for the BSVD bio-sensor contract? Preface your response with either of the following: "Yes, we recommend contracting without providing for full and open competition" or "No, we do not recommend contracting without providing for full and open competition." Note: References to the specific FAR exceptions to full and open competition are not necessary, as these will be addressed in question 2(b). Focus your response on the facts presented in the case and what you find appropriate in relation to conducting full and open competition or limiting competition. Provide at least three facts from the case that support your rationale and explain how these facts lead to your conclusion.

Answers

Answer:

No, we do not recommend contracting without providing for full and open competition. There is sufficient evidence that the necessary BSVD is only available from the original source, NanoTech, and that use of any other contractor would create unacceptable delays in fulfilling the need.

Jimmy Fallon's persona when he is outside the White House can best be characterized as:A. humble and excited.
B. outrageous and crazy.
C. stern and authoritative.
D. dark and serious.

Answers

B) outrageous and crazy

The answer to your question is b

Which of these is outside the scope of an art director's responsibility?

Answers

Answer:

Establishing Tight deadlines for a rush job.

Explanation:

The time taken for a rush job has nothing to do with the art director because it has nothing to do with art. Also rush jobs already call for tight deadlines so technically the deadline is already established.

Answer: cropping a photograph for the sake of space

Explanation: edge 22

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In open addressing with linear probing we must consider how to encodeA. Occupies positionsB. Available positionsC. All other answersD.empty positions

Change the screen resolution so you can view more information on your screen. Use the resolution that enables you to fit the most information on the screen while still being able to read the display.Use the space below to indicate your screen resolution and to describe the steps you used to do this.

Challenge: Tic-Tac-Toe (Report a problem) Detecting mouse clicks For this step of the challenge you will complete Tile's handleMouseClick method. The handleMouseClick method has two parameters: x and y which represent the coordinates of where the user clicked the mouse. When a user clicks inside a tile, that tile's handleMouseClick method should call that tile's onClick method. To check if the mouse click is inside of the tile, you will need an if statement that checks if: - the mouse click is on, or right of, the left edge of the tile - the mouse click is on, or left of, the right edge of the tile - the mouse click is on, or below, the upper edge of the tile - the mouse click is on, or above, the lower edge of the tile