The statement "A context-free grammar can be constructed to generate a language, proving that it is context-free" is true.
To show that a language is context-free, one can use a few methods.
Firstly, one can try to find a context-free grammar that generates the language.
This involves constructing rules that produce the desired strings of the language.
If such a grammar can be found, then the language is indeed context-free.
Alternatively, one can use the pumping lemma for context-free languages to prove that the language cannot be context-free.
This involves assuming that the language is context-free and then showing that there exists a string in the language that cannot be pumped.
If this is the case, then the language is not context-free.
Therefore, it is either true or false that a language is context-free, depending on whether a context-free grammar or pumping lemma can be used to prove it.
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The statement "A context-free grammar can be constructed to generate a language, proving that it is context-free" is true.
To show that a language is context-free, one can use a few methods.
Firstly, one can try to find a context-free grammar that generates the language.
This involves constructing rules that produce the desired strings of the language.
If such a grammar can be found, then the language is indeed context-free.
Alternatively, one can use the pumping lemma for context-free languages to prove that the language cannot be context-free.
This involves assuming that the language is context-free and then showing that there exists a string in the language that cannot be pumped.
If this is the case, then the language is not context-free.
Therefore, it is either true or false that a language is context-free, depending on whether a context-free grammar or pumping lemma can be used to prove it.
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Write a script named copyfile.py. this script should prompt the user for the names of two text files. the contents of the first file should be input and written to the second file.
Based on the above, The script named copyfile.py. is written in the image attached.
What is a script?In regards to computer programming, a script is known to be a kind of a computer program or we can say a sequence that is known to be made up of a lot of instructions that is often seen to be interpreted or done by another program instead of the computer processor.
Note that some languages have been birth a lot expressly and they are known to be the script languages.
Therefore, scripting language or we say script language is known to be a programming language that is is often used to alter , customize, and automate what we say the facilities of any existing system.
Hence, Based on the above, The script named copyfile.py. is written in the image attached.
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An instructor has given a student an assignment to assemble a pc. in which situation should the student be aware that esd is an issue?
When installing RAM situation is one where the student should be aware that esd is an issue.
What is the RAM in a computer?RAM is a term that connote random-access memory and a computer RAM is known to be a kind of a short term memory and it is a place where data is said to be saved as at the time that the processor needs it.
Hence, When installing RAM scenario is one where the student should be aware that esd is an issue and then one can resolve it.
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An instructor has given a student an assignment to assemble a PC. In which situation should the student be aware that ESD is an issue?
when installing RAMwhen working in a corporate environment that has carpet installed under tower PCswhen using a grounded mat and working on a computer on an ungrounded workbenchwhen installing a dual-voltage power supplyLearn more about RAM from
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Assign 20 to variables x, y and z in a single statement.
Answer:
x=y=z=20
Explanation:
This assigns the same value, which is 20 to multiple variables
Every time you call a method, the address to which the program should return at the completion of the method is stored in a memory location called the ____.
Answer:
Stack
Explanation:
Every time you call a method, the address to which the program should return at the completion of the method is stored in a memory location called the stack.
find_cow(name, cows) Given a name and a Python list of Cow objects, return the Cow object with the specified name. If no such Cow object can be found, return None.
Using the computational knowledge in python it is possible to write a code that Given a name and a Python list of Cow objects
Writting the code in python:def load_cows(filename):
cow_dict = dict()
f = open(filename, 'r')
for line in f:
line_data = line.split(',')
cow_dict[line_data[0]] = int(line_data[1])
return cow_dict
def greedy_cow_transport(cows, limit=10):
trips = []
cowsCopy = cows.copy()
sortedCows = sorted(cowsCopy.items(), key=lambda x: x[1], reverse = True)
while sum(cowsCopy.values()) > 0:
ship = []
total = 0
for cow, value in sortedCows:
if cowsCopy[cow] != 0 and value + total <= limit:
ship.append(cow)
total += value
cowsCopy[cow] = 0
trips.append(ship)
return trips
def brute_force_cow_transport(cows,limit=10):
trips = []
possibilities = []
for i in power_list:
ship = []
for j in i:
ship_weights = []
for k in j:
ship_weights.append(cows[k])
#print(ship_weights)
ship.append(sum(ship_weights))
#print(ship)
if all(d <= limit for d in ship):
possibilities.append(i)
pruned_possibilities = []
for k in possibilities:
if k not in pruned_possibilities:
pruned_possibilities.append(k)
# now find the minimum list length:
min_list_len = min(map(len, pruned_possibilities))
for l in pruned_possibilities:
if len(l) == min_list_len:
return l
def compare_cow_transport_algorithms():
greedy_start = time.time()
greedy_results = greedy_cow_transport(cows, limit = 10)
greedy_end = time.time()
print('Greedy Algorithm time:', greedy_end -greedy_start)
brute_force_start = time.time()
brute_force_results = brute_force_cow_transport(cows, limit = 10)
brute_force_end = time.time()
print('Brute force time:', brute_force_end - brute_force_start)
print('Greedy Algorithm results:', greedy_results)
print('Number of trips returned by Greedy Algorithm:', len(greedy_results))
print('Brute Force Algorithm results:', brute_force_results)
print('Number of trips returned by Brute Force Algorithm:', len(brute_force_results))
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The appropriate software to use for writing and editing research papers is ________ software.
The appropriate software to use for writing and editing research papers is word processing software.
What is a word processing software?A word processor is a computer application that allows you to create and edit text documents on a computer. It is a multifunctional software for writing, with different typography (fonts/fonts), font sizes, colors, paragraph types, artistic effects and other options.
With a word processor, however, it is possible to delete and edit the content at any time, as its basic functionality is performed on the screen. Once the writing task has been completed, the user has the option of saving the document on a computer medium (either on the computer's hard disk, on the Internet or on a CD) or printing the material.
Several people make use of this software, such as students from schools and colleges, resarchers, professionals working in the field of Law, engineers, teachers, among other people who need a program to edit or create text files.
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Simple statistics looks catalog 3.15 LAB: Simple statistics Given 4 floating-point numbers. Use a string formatting expression with conversion specifiers to output their product and the average as integers (rounded, then as floating point numbers Output each rounded integer using the following print (1.0).tornat (your_value)) Output each floating point value with three digits after the decimal point, which can be achieved as follows print(1.3).format(your value)) Ex If the input is 3.3 10. 5.0 the output is 20722 2071. 7. 125 ACTIVITY 3151 LAB Simple statistics 0/10 main.py 1 2 - Floatinet()) - Floatinus Fotout Flatirot)
Based on the given instructions:
1. you must set the display format for all values: %0.2f
2. use f-string in this format: f"{}" and add your value in {}
3. int: convert float to integer and round: round up the number
The given codenum1 = float(input())
num2 = float(input())
num3 = float(input())
average = (num1+num2+num3) / 3
your_value = num1*num2*num3
print('%0.0f %0.0f %0.2f %0.2f' % (int(average), int(your_value), average, your_value))
# or:
print(f"{int(average)} {int(your_value)} {round(average,2)} {round(your_value,2)}")
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If a DBMS enforces a DELETE CASCADE option on the referential integrity constraint between SELLER and REALTOR in the HOMETOWN REALESTATE database, what will be the outcome after a user tries to delete the third record (R3, Cliff) from REALTOR
The outcome will be option b: ) CLIENT will have 6 records, AGENT will have 3 records.
What are client records?Client record is known to be a form of a written composition of information that tells and documents the examination , diagnosis or others of a client.
Based on the above scenario, The outcome will be option b: ) CLIENT will have 6 records, AGENT will have 3 records.
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which of the following is acomputer program that detects, prevents. and takes action sto deactivate or remove malicious programmsd
Answer:
antivirus software is the answer to prevent computer from malicious program
What is the purpose of installing updates on your computer?
The purpose of adding updates to your computer are as follows:
Making sure your computer hardware can run the newest software programsEnsuring the built-in virus protection software is up to dateRemoving bugs and glitches from your operating systemAllowing your computer to run as fast as possibleIn which directory would a system administrator store scripts that should be run monthly by the cron daemon?
Answer: /etc/cron.monthly
Explanation:
In order to prevent ports that are serving network hosts from being considered as best paths, what should be enabled to block bpdus?
In order to prevent ports that are serving network hosts from being considered as best paths, BPDU guard should be enabled to block bpdus.
What are BPDU used for?A bridge protocol data unit (BPDU) is known to be a kind of a data message that is known to be often transmitted in a local area network to be able to know or find loops in that given network topologies.
Hence, in the case above, In order to prevent ports that are serving network hosts from being considered as best paths, BPDU guard should be enabled to block bpdus.
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. In order to prevent ports that are serving network hosts from being considered as best paths, what should be enabled to block BPDUs?
a. BPDU filter
b. BPDU guard
c. root guard
d. BPDU drop
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A photograph is created by what
A) Silver
B) Shutters
C) Light
4) Mirror
A photograph is created by Light.
What are photographs made of?Any photograph created is one that is made up of Support and binders.
The steps that are needed in the creation of a photograph are:
First one need to expose or bring the film to light.Then develop or work on the imageLastly print the photograph.Hence, for a person to create a photograph, light is needed and as such, A photograph is created by Light.
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You need a(n) _____ to play an mp3 audio file on a desktop or laptop computer
You need a stand alone player to play an mp3 audio file on a desktop or laptop computer.
What is a stand alone player?The standalone player is known to be a device that gives room for a person or is one that allows a Blender game to be able to run without one trying to load the Blender system.
Note that in the above, You need a stand alone player to play an mp3 audio file on a desktop or laptop computer.
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Write a short program that asks the user to enter a month & prints a message based on the month
Answer:
The Code:
def month(x):
if (x==1):
print ("January")
if (x==2):
print("February")
if (x==3):
print("March")
if (x==4):
print("April")
if (x==5):
print("May")
if (x==6):
print("June")
if (x==7):
print("July")
if (x==8):
print("August")
if(x==9):
print("September")
if(x==10):
print("October")
if(x==11):
print("November")
if(x==12):
print("December")
if(x<1 or x>12):
print("Wrong Input! Try again")
month = int(input("Enter the month number: "))
month(month)
Explanation:
The above program is written in the PYTHON programming language.
In this program, the user inputs the number of any month, showing the month name in the output. For example,
if user enters 1, month name = JANUARY
if user enters 5, month name = MAY
and if the user enters 13, then output = Wrong Input! try again
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Mary and Billy are moving away to college and both know in their hearts that they need to end their relationship. They move away with a mutual agreement to breakup and leave peacefully. What is this called
In the case of Mary and Billy, the above is called Negotiated farewell.
What is Negotiated farewell?In the case of Negotiated Farewell, one can say that couples are knonw to jointly create the story of the end to what we say their marriage.
Note that Negotiated Farewell is one that is made for emotionally immature or any kind of combative people. hence, In the case of Mary and Billy, the above is called Negotiated farewell.
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7.6 lab: replacement words write a program that finds word differences between two sentences. the input begins with the first sentence and the following input line is the second sentence. assume that the two sentences have the same number of words. the program displays word pairs that differ between the two sentences. one pair is displayed per line. ex: if the input is: smaller cars get better gas mileage tiny cars get great fuel economy then the output is: smaller tiny better great gas fuel mileage economy hint: store each input line into a list of strings.
The program that finds word differences between sentences (according to the description) above is given below.
What is a program?A program is a set of codes and or instructions that are written sequentially and deliberately such that the computer, when it reads and executes them give a specific and premedicated output.
The lines of code that gives the output described above is:
import java.util.Scanner; public class LabProgram {
public static int findWordInWordList(String[] wordList, String wordToFind, int numInList) {
for (int i = 0; i < numInList; i++) {
if (wordList[i].equals(wordToFind)) {
return i;
} } return -1;
} public static void main(String[] args) {
Scanner scnr = new Scanner(System.in);
String[] original = new String[20], modified = new String[20]; int numInList = scnr.nextInt();
for (int i = 0; i < numInList; i++) {
original[i] = scnr.next();
modified[i] = scnr.next();
} int numWords = scnr.nextInt();
String[] words = new String[numWords];
for (int i = 0; i < numWords; i++) {
words[i] = scnr.next();
} int index;
for (int i = 0; i < numWords; i++) {
index = findWordInWordList(original, words[i], numInList); if (index != -1)
words[i] = modified[index];
} for (int i = 0; i < numWords; i++) System.out.print(words[i] + " ");
System.out.println(); } }
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Which epolicy orchestrator component gathers the events from the managed systems and uploads them to the epo server?
The policy orchestrator component that gathers the events from the managed systems and uploads them to the epo server is mcAfee agent.
Which ePolicy orchestrator component is enforced?The McAfee Agent can be described as the one that is distributed component of McAfee ePolicy Orchestrator (McAfee ePO).
It helps in downloads and enforcement of policies and it executes client-side tasks.
To find find McAfee agent, one can follow these steps:
View McAfee Agent Status MonitorOn the managed system, select McAfee Agent Status Monitor. Save Contents to Desktop to save the contents of the McAfee Agent log to a file.Learn more about mcAfee agent at:
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Any two differences between second generation and third generation Write any generation computer.
Answer:
The second generation computer is based on the transistor whereas the third generation computer is based on the integrated chip.
Explanation:
Anonymity on the internet has lowered the cost of rudely confronting people. what has happened to the supply of rude confrontations?
The thing that has happened to the supply of rude confrontations is that The supply has increased, shifting down and to the right.
What supply means in economics?Supply in economics is known to be seen as the full amount of a given product or service that a given supplier is known to offers to consumers at a specific point in time and a given price level.
Hence, The thing that has happened to the supply of rude confrontations is that The supply has increased, shifting down and to the right because Anonymity on the internet has lowered the cost of rudely confronting people.
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Anonymity on the Internet has lowered the cost of rudely confronting people. What has happened to the supply of rude confrontations? a) The supply has decreased, shifting up and to the left. b) The supply has increased, shifting up and to the left. C) The supply has decreased, shifting down and to the right. d) The supply has increased, shifting down and to the right. Question 46 (1 point) Figure: Supply Shift Saved Price $100-
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If a few bits in an hdd sector or nvm page are corrupted, the controller can recover the correct values using ecc only if:___.
If a few bits in an hdd sector or nvm page are corrupted, the controller can recover the correct values using ecc only if option D) number of bits corrupted is low irrespective of where the corruption occurs in the sector/page.
Do hard drives have sectors?In computer disk storage, a sector is known to be a kind of a subdivision that is made up of a track that can be seen on a magnetic disk or what we call the optical disc.
Note that Each sector is one that saves a fixed amount of what we call the user-accessible data.
Note that the sector is seen as the smallest physical storage unit that can be found on the disk, and also on most file systems and thus when a few bits in an hdd sector or nvm page are corrupted, the controller can recover the correct values using ecc only if option D) number of bits corrupted is low irrespective of where the corruption occurs in the sector/page.
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If a few bits in an HDD sector or NVM page are corrupted, the controller can recover the correct values using ECC only if
A) the bit corruption is limited to the data portion of the sector/page.
B) the bit corruption hasn't occurred in the ECC of the sector/page.
C) the bit corruption hasn't occurred in the ECC or the header of the sector/page.
D) number of bits corrupted is low irrespective of where the corruption occurs in the sector/page.
What are the three different types of hard drives? Briefly describe each, and list the possible configurations and device files for each type. Describe RAID level 5. What are the advantages of using RAID level 5 over other types of RAID?
The three different types of hard drives are:
SATASSD NVMeWhat is the SATA drive?This was said to be Introduced in the year 2003, SATA (or Serial Advanced Technology Attachment) is known to be a kind of a default interface that was made for a lot of desktop and laptop hard drives.
Hence, The three different types of hard drives are:
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Deploying an application across multiple __________________ can help build a robust architecture for an application that needs to have an up-time of at least 99.5
Deploying an application across multiple regions can help build a robust architecture for an application that needs to have an up-time of at least 99.5.
What is multi-region deployment?The Multi-Region Infrastructure Deployment is known to be one that aids customers a lot to be able to easily control updates in regards to infrastructure needed for applications that are said to be deployed in all of primary and secondary Regions.
Hence, Deploying an application across multiple regions can help build a robust architecture for an application that needs to have an up-time of at least 99.5.
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PLEASE HELP!! And please don't just answer for points.
This question is from my animation class.
What was the “aha!” moment or breakthrough that Ulbrich describes?
Answer:
What was the aha moment or breakthrough that Ulbrich describes?
Explanation:
The “aha!” moment was when the found out about a new type of technology, called contour. This helped them create their character in a much better way.
connection failed while opening file within cryptographic module - mbedtls_ssl_handshake returned -9984 ( X509 - Certificate verification failed, e.g. CRL, CA or signature check failed )
The connection that failed while opening file within cryptographic module - mbedtls_ssl_handshake returned -9984 ( X509 - Certificate verification failed, e.g. CRL, CA or signature check failed is known to be a kind of a TLS hanshake failing with EC.
What are cryptographic products?These are known to be Software, hardware or what we call the firmware that is made up of one or a lot of cryptographic functions.
Note that a cryptographic product is one that is made up of a kind of cryptographic module and they also help to implements security functions (such as cryptographic algorithms),
Therefore, based on the above, The connection that failed while opening file within cryptographic module - mbedtls_ssl_handshake returned -9984 ( X509 - Certificate verification failed, e.g. CRL, CA or signature check failed is known to be a kind of a TLS hanshake failing with EC.
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"necessarily is the mother of computer " justify this statement with respect to the evolution of computer.
Explanation:
Computers in the form of personal desktop computers, laptops and tablets have become such an important part of everyday living that it can be difficult to remember a time when they did not exist. In reality, computers as they are known and used today are still relatively new. Although computers have technically been in use since the abacus approximately 5000 years ago,
When you group together related variables, the group is referred to as a(n) ____ of variables
Answer:
Array of variables
Explanation:
This occurs when you group together related variables
Joe is examining the logs for his web server and discovers that a user sent input to a web application that contained the string WAITFOR. What type of attack was the user likely attempting
Every time a user enters a different web page url into a browser, the same web page appears. what will help in this situation?atask managerbfirewallcanti-malwareddevice manager
Every time a user enters a different web page url into a browser, the same web page appears. the issue that can help is the use of firewall.
What is firewall and how it works?The term firewall is known to be that which helps protect a person's network from attackers.
Note that A firewall shields one's network because it work in a 24/7 filter window, and this is one that often works by scanning the data that tries to enter your network and hinder anything that may act or looks suspicious from getting through.
Hence, in the case above, Every time a user enters a different web page url into a browser, the same web page appears. the issue that can help is the use of firewall.
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At startup, Windows Server 2012 Core presents _______.
At startup, Windows Server 2012 Core presents a command window.
What is a Windows Server used for?Windows Server is known to be a kind of a group of operating systems that is made by Microsoft that aids enterprise-level management, data storage, applications, and others.
The Command window is known to be that which gives a person the information, it also gives instructions, and gives room for one to be able to enter commands usually at the Command prompt.
Therefore, note that at startup, Windows Server 2012 Core presents a command window as it is the first thing that will come up.
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