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Phoenix [80]
3 years ago
9

Assume that x is a string variable has been given a value. Write an expression whose value is true if and only if x is an hexade

cimal (Base 16) digit (0-9 plus A-F or a-f).
Computers and Technology
1 answer:
Lady bird [3.3K]3 years ago
6 0

Answer:

import string

all(c in string.hexdigits for c in s)

Explanation:

The hexadecimal number system, often abbreviated as "hex", is a numeral system which consist of 16 symbols (base 16). The standard numeral system we are all use to, called decimal (base 10) and utilizes ten symbols: 0,1,2,3,4,5,6,7,8,9.

Using python programming language

import the  string module

the second expression iterate through the digit in s and confirm if they all are within the rage of 0 -9 ad A -F. If yes , it returns True and else, it returns false

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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
How do you run a function in python?
Black_prince [1.1K]
You can call a Python function like so: function(parameters).

Example:

Define function add:
def add(x,y):
return x+y

Call function:
add(3,7) -> 10
3 0
3 years ago
Which of the following is the most common tool that Windows administrators use on the domain controller?
baherus [9]

Answer:

D. The Active Directory Users and Computers

Explanation:

The Active Directory Users and Computers (ADUC) is one of the many tools used to administer the Active Directory and it is the most common tool that Windows admins use on the domain controller. It provides most of the admins functions such as

i. resetting of password

ii. unlocking users

iii. delegating of permissions to users to manage group policy

iv. managing Active Directory objects - users, computers, contacts, groups - and their attributes.

Other tools are Active Directory Component Services (allows to manage component services), Active Directory Domains and Trusts (allows to manage trusts between forests and domains), Active Directory Administrative Center (allows to manage password policies and even get the history of PowerShell logs).

<em>Hope this helps!</em>

3 0
3 years ago
*When a computer programmer is finished writing or developing a program, what has to happen first before the computer can unders
Alenkinab [10]

Answer:

C. The source code has to be translated into object code.

5 0
3 years ago
Zeke used primarily Web sources for his informative speech about gun control. However, his over-reliance on the website sponsore
Andreas93 [3]

Answer:

a. Objectivity

Explanation:

Zeke ignored objectivity as a criteria for evaluating Web sources.

7 0
3 years ago
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