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3 years ago

Select a correct statement regarding a hashing process.

Computers and Technology

1 answer:

kogti [31]3 years ago

4 0

Answer:

a) It is used for authentication.

Explanation:

Hashing is a process of transforming a single key into another value. It generates the values using a mathematical algorithm. the outcome of this process is a hash value or a hash.

The hashing process is used for authentication.

The hashing process is not reversible.

The hashing process is used to create the digital signature.

The outcome of the hashing process is the hash value, not a message.

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The waterfall model and spiral model are variations of SDLC. Do some research to find out what they are and explain how these mo

Radda [10]

Waterfall model and spiral model are used in software development life cycle or SDLC. Any software development process follows one of these models depending on the type of software and the requirements of the customer.

Waterfall model

This model is called as sequential model since it works in stages. The output of first stage becomes the input of the second stage.

The errors of the first stage can be rectified only when it is completed. This is time consuming and makes the process lengthy. Stage 1 is completed before stage 2 begins.

The six stages involved in waterfall model are Requirement Gathering and analysis, System Design, Implementation, Integration and Testing, Deployment of system, and Maintenance.

Spiral model

This model is implemented in iterations. It is also called evolutionary model.

Initially a prototype of the system is prepared. Then, it is followed by development of small parts of the system.

These smaller parts are then assembled to produce the final system.

The four stages which form the spiral model are Identification, Design, Development and Evaluation and Risk Analysis.

The differences between the two models are summarized below.

1. Waterfall model works in linear method. Spiral model follows evolutionary method.

2. Errors and risks are discovered/ rectified after the stage is over. Errors and risks are discovered/ rectified earlier.

3. Waterfall model is suitable for small projects. Spiral model is suitable for large projects.

4. Requirements identification and planning is the initial stage in the waterfall model. Requirements identification and planning is done when needed, in the spiral model.

5. Waterfall model allows little to no flexibility in the system. Spiral model allows flexibility in the system.

6. Low flexibility makes the waterfall model more risky. High flexibility makes the spiral model less risky.

7. Waterfall model, overall, takes less time since requirements are clear. Spiral model is implemented when the requirements of the system are not clear and become clear through prototypes.

8 0

3 years ago

This is your code. >>> A = ['dog''red'] >>> B = [' cat', 'blue']>>>C = ['fish', 'green'] You can impl

natima [27]

Answer:

The answer to this question is given below in the explanation section.

Explanation:

The given Python code is:

>>> A = ['dog''red']

>>> B = [' cat', 'blue']

>>>C = ['fish', 'green']

We can implement an array of this data by using the dictionary in Python.

Dictionary in python:

A dictionary in python stores (key-value) pairs. For example, we can implement the -given arrays A, B, and C in the dictionary as given below:

d={'dog : red', 'cat : blue', 'fish : green'}

print(d['dog']) # Get an entry from a dictionary; prints "red"

print('cat' in d) # Check if a dictionary has a given key; prints "True"

d['fish'] = 'black' # Set an entry in a dictionary

print(d['fish']) # Prints "black"

# print(d['elephant']) # KeyError: 'elephant' not a key of d

print(d.get('elephant', 'N/A')) # Get an element with a default; prints "N/A"

print(d.get('fish', 'N/A')) # Get an element with a default; prints "black"

del d['dog'] # Remove an element from a dictionary

print(d.get('dog', 'N/A')) # "dog" is no longer a key; prints "N/A"

3 0

2 years ago

Read 2 more answers

Is greedy algorithm non deterministic by nature?

Flura [38]

Answer: Yes

Explanation: Greedy algorithm is the algorithm that gives the solution to the problem on the basis of the piece by piece or step by step architecture. the next step of the solution is based on the aim of solving problem optimally.But the steps chosen can be correct or incorrect.

Non-deterministic nature is the feature that determines that the steps that is being chosen is not the most optimal one and no high surety is present.Thus, this nature is present in the greedy algorithm and it has non-deterministic nature.

7 0

3 years ago

State 3 file formats explain them in an understanding manner apart from Microsoft word and PDF

natita [175]

Answer:

Hope below explanations are enough.

Explanation:

1. JPEG (or JPG) - Joint Photographic Experts Group

JPEGs might be the most common file type you run across on the web, and more than likely the kind of image that is in your company's MS Word version of its letterhead. JPEGs are known for their "lossy" compression, meaning that the quality of the image decreases as the file size decreases.

You can use JPEGs for projects on the web, in Microsoft Office documents, or for projects that require printing at a high resolution. Paying attention to the resolution and file size with JPEGs is essential in order to produce a nice looking project.

2. PNG - Portable Network Graphics

PNGs are amazing for interactive documents such as web pages, but are not suitable for print. While PNGs are "lossless," meaning you can edit them and not lose quality, they are still low resolution.

The reason PNGs are used in most web projects is that you can save your image with more colors on a transparent background. This makes for a much sharper, web-quality image.

3. GIF - Graphics Interchange Format

GIFs are most common in their animated form, which are all the rage on Tumblr pages and in banner ads. It seems like every other day we have a new Grumpy Cat or Honey Boo Boo animated GIF. In their more basic form, GIFs are formed from up to 256 colors in the RGB colorspace. Due to the limited number of colors, the file size is drastically reduced.

This is a common file type for web projects where an image needs to load very quickly, as opposed to one that needs to retain a higher level of quality.

4. TIFF - Tagged Image File

A TIF is a large raster file that doesn't lose quality. This file type is known for using "lossless compression," meaning the original image data is maintained regardless of how often you might copy, re-save, or compress the original file.

Despite TIFF images' ability to recover their quality after manipulation, you should avoid using this file type on the web -- it can take forever to load. TIFF files are also commonly used when saving photographs for print.

5. PSD - Photoshop Document

PSDs are files that are created and saved in Adobe Photoshop, the most popular graphics editing software ever. This type of file contains "layers" that make modifying the image much easier to handle. This is also the program that generates the raster file types mentioned above.

The largest disadvantage to PSDs is that Photoshop works with raster images as opposed to vector images.

6 0

3 years ago

PLEASE HELP WILL MARK BRAINLIEST ASAP

Charra [1.4K]

Answer:

This is a heading

Explanation:

This is a paragraph does not exist. You would simply use p for paragraph. Therefore This is a heading is the correct answer.

8 0

3 years ago