Explain the purpose of the open() and close() operations.

Answers

Answer 1

Answer:

The open() operation notifies the system that the named file is about to become active. The close() operation notifies the system that the named file is no longer in active use by the user who issued the close operation.


Related Questions

By Using the following schema, answer the following SQL queries and commands: Product(P_code.P_name, P_price, P_on_hand,vend_code) Vender(vend_code, vend_fname, vend_areacode, vend_phone) 1- find the venders names who sell products in TN-5 area and their names include "dan". 2- find the code, name and vender code of product that has price between 1500S and 2500S and the product that has price between 48005 and 5600S. 3- Find the name, and code of venders who had 5 microwaves that has price less than 3500S. 4- Find the phone numbers of venders who sell Televisions. 5- Delete the records of venders who their first name is 'smith'

Answers

Explanation:

answer me pls i need sol bbbd

What do you do if your computer dies/malfunctions? Reboot (Restart) Shut Down Recovery CD and Recover your system Call a person to fix it​

Answers

Answer:

Restart

Explanation:

Simply I may restart my pc if it dies/malfunctions. I'll not restart immediately, I'll wait for an hour and do restart my computer. If it doesn't work then maybe I'll Call a person to fix it.

2. Which property is used for hiding text of the textbox?
a) Password Char b) Text Char c) Char Password d) Pass Char

Answers

Answer:

password char

Explanation:

The password char property allows the text being written in the textbox to be hidden in the form of dots or stars. As such the user entering the password is secure, as no one nearby can know the password by watching the texts.

How to prepare and draw a corresponding flowchart to compute the sum and product of all prime numbers between 1 and 50

Answers

Answer:

Create boxes with the following content

Initialize sum to 0, product to 1 and number to 1Check if number is a prime. If yes, update sum += number and product *= numberIncrease number by 1If number is <= 50, go back to "check" block.

The check block has a diamond shape.

At the "yes" branch of the check block, you can create separate blocks for updating the sum and the product.

Connect the blocks using arrows.

Indicate the start and the end of the flow using the appropriate symbols.

The block to check if a number is a prime you could further decompose into the steps needed to do such a check.

e) Point out the errors( if any) and correct them:-
class simple
{
inta,b,c;
double sumNumber
{
int d = a + b + c;
double e = d/5.6;
return e;
}
void show Number()
{
a = 10, b = 20, c=5;
System.out.println(d);
double f = sumNumber(a,b,c);
System.out.print(e);
}
}​

Answers

Explanation:

double e-d/5.6;is wrong it should return to c

Select the scenario that describes a top-down approach to data warehouse design.


Cathy’s Cards and Gifts, which has three stores, creates data marts for its sales, marketing, and delivery departments to study the possibility of establishing a new store.


Crawford's Fabrics, which wants to expand its operations, combines data from the purchasing and sales departments into a central database, to be divided into new data marts as needed.


Cynthia’s Florals, which is dealing with debt, creates new data marts for the service, delivery, and sales departments to develop a strategy to stay in business.


Connor’s Meat Market, which just opened, creates data marts to track the sale of each of the following meats: beef, pork, lamb, and fish.

Answers

Answer:

Crawford's Fabrics, which wants to expand its operations, combines data from the purchasing and sales departments into a central database, to be divided into new data marts as needed.

The scenario defines a top-down approach to data warehouse design as "Crawford's Fabrics, which wants to expand its operations, combines data from the purchasing and sales departments into a central database, to be divided into new data marts as needed".

What is a top-down approach to data warehouse design?

In the "Top-Down" method system, a data warehouse exists defined as a subject-oriented, time-variant, non-volatile, and integrated data storage for the entire business data from various sources exist validated, reformatted, and saved in a normalized (up to 3NF) database as the data warehouse.

Therefore, the correct answer is option b) Crawford's Fabrics, which wants to expand its operations, combines data from the purchasing and sales departments into a central database, to be divided into new data marts as needed.

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Write a program named lastname_firstname_cities.py that works with information about large cities. Your program will open the cities.txt downloadfile. Each line in the file has the name of a city, its country, and its population. The first few lines of the file look like this:

Answers

Answer and Explanation:

Open your text editor and open new file. Save new file file as lastname_firstname_cities.py. The program will open the file cities.txt downloadfile hence :

dfile= open(cities.txt, "r")

If we write this into our lastname_firstname_cities.py file it will open our cities.txt downloadfile in read mode and text mode(by default unless we specify binary mode which is for images)

College
START: what new information, strategies, or techniques have you learned that will increase your technology skills? Explain why its important to START doing this right away

Answers

Answer:

Read Technical Books. To improve your technical skills and knowledge, it's best to read technical books and journals. ...

Browse Online Tutorials. ...

Build-up online profile. ...

Learn new Tools. ...

Implement what you learned. ...

Enrich your skillset. ...

Try-out and Apply.

Analyzing the role of elements in audio editing and Video
+ analyzing the role of the visual element in Video + analyzing the role of text factor
+ analyzing the role of the audio factor
+ analyzing the role of the transfer scene
+ analysing the role of the audio visual effects

Answers

Answer:

Analyzing the role of elements in audio editing and Video

+ analyzing the role of the visual element in Video + analyzing the role of text factor

+ analyzing the role of the audio factor

+ analyzing the role of the transfer scene

+ analysing the role of the audio visual effect

I connected to an external hard drive to transfer some photos from my vacation. When I try to drag the photo, it bounces right back and does not transfer. What is the likely cause of this issue?

a. hard drive is full

b. photos were taken in a different country

c. USB port is broken

d. the file structure of the 2 hard drives are not compatible

Answers

Your answer is D.

Hope this helps and if you could answer the question I just uploaded titled giving brainliest that would be great. Basically, what you have to do is research why the book titled the list of things that will not change and explain why it’s your favorite book based on the message it tells you! Go to my profile and go to questions.

The answer is D, What is the likely cause of this issue is that the file structure of the two hard drives are not compatible.

The file structure or file system, of a hard drive, tells the disk how to read, write and store information on the drive. Some file systems do not allow the disk to store any files and often do not display error messages. If we try to drag a file onto a hard drive with this kind of file structure, the action would simply not be performed. This can be fixed by formatting the disk partition into a new file system.

Option B states that the issue may be that the photos were taken in a different country. This is not the cause of the problem because regardless of where the pictures are taken, they are all stored in common formats such as:

JPEGPNGJFIF

Any external hard drive capable of storing images will have the ability to receive files in these formats as well as many other image formats. For this reason, option B is False.

The question states that you were able to connect the external Hard drive and drag files onto it, though unsuccessfully. This tells us that the USB port is working as intended, if it were not working, it would not display the Hard drive onto the computer and we would not be able to drag files to it. Therefore, option C is false

Insufficient Hard drive storage space is a common issue in not being able to transfer files between hard drives. However, if this were the case, the user would be shown a message displaying the error. The message may look like:

"Insufficient space on the disk.""The Disk is full.""Not enough memory to complete this action"

The exact wording may vary depending on the operating system in use. Since the question states that the files simply "bounces back" without an error message displaying, we can infer that option A is false.

For more help with Hard drive issues see: https://brainly.com/question/14254444?referrer=searchResults

PartnerServer is a Windows Server 2012 server that holds the primary copy of the PartnerNet.org domain. The server is in a demilitarized zone (DMZ) and provides name resolution for the domain for Internet hosts.
i. True
ii. False

Answers

Answer:

i. True

Explanation:

A Domain Name System (DNS) can be defined as a naming database in which internet domain names (website URLs) are stored and translated into their respective internet protocol (IP) address.

This ultimately implies that, a DNS is used to connect uniform resource locator (URL) or web address with their internet protocol (IP) address.

Windows Server 2012 is a Microsoft Windows Server operating system and it was released to the general public on the 4th of September, 2012, as the sixth version of the Windows Server operating system and the Windows NT family.

PartnerServer is a Windows Server 2012 server that was designed and developed to hold the primary copy of the PartnerNet dot org domain.

Typically, the server is configured to reside in a demilitarized zone (DMZ) while providing name resolution for the domain of various Internet hosts.

In order to prevent a cyber attack on a private network, end users make use of a demilitarized zone (DMZ).

A demilitarized zone (DMZ) is a cyber security technique that interacts directly with external networks, so as to enable it protect a private network.

Which one is the result of the ouWhen you move a file to the Recycle Bin, it will be immediately deleted from your computer.

A. True

B. Fals

Answers

Answer:

B => false

Explanation:

it just keep it on recycle bin => not being removed

False

Explaination :

The deleted file will stay in Recycle Bin for a short period of time before it's permanently deleted from your computer

what is programming language?​

Answers

Answer:

A programming language is a formal language comprising a set of strings that produce various kinds of machine code output. Programming languages are one kind of computer language, and are used in computer programming to implement algorithms. Most programming languages consist of instructions for computers

Answer:

The artificial languages that are used to develop computer programs are called programming language . hope this help!

Write a program that asks the user to enter in a username and then examines that username to make sure it complies with the rules above. Here's a sample running of the program - note that you want to keep prompting the user until they supply you with a valid username:

Answers

user_in = input ("Please enter your username: " )

if user_in in "0123456789":

print ("Username cannot contain numbers")

elif user_in in "?":

print ("Username cannot continue special character")

else:

print (" Welcome to your ghetto, {0}! ".format(user_in))

Argue whether we can infer anything about a candidate’s ability to work in a professional environment based on his or her resume’s formatting.
Compare how you would address a resume with wacky fonts to how you would respond to grammatical errors in a resume.

Answers

Answer:

when dressing feaded back is postive and then list areas of inprovmenr to met the job requirements

Explanation:

Write a recursive function called DrawTriangle() that outputs lines of '*' to form a right side up isosceles triangle. Function DrawTriangle() has one parameter, an integer representing the base length of the triangle. Assume the base length is always odd and less than 20. Output 9 spaces before the first '*' on the first line for correct formatting.

Answers

Answer:

Code:-  

# function to print the pattern

def draw_triangle(n, num):

     

   # base case

   if (n == 0):

       return;

   print_space(n - 1);

   print_asterisk(num - n + 1);

   print("");

 

   # recursively calling pattern()

   pattern(n - 1, num);

   

# function to print spaces

def print_space(space):

     

   # base case

   if (space == 0):

       return;

   print(" ", end = "");

 

   # recursively calling print_space()

   print_space(space - 1);

 

# function to print asterisks

def print_asterisk(asterisk):

     

   # base case

   if(asterisk == 0):

       return;

   print("* ", end = "");

 

   # recursively calling asterisk()

   print_asterisk(asterisk - 1);

   

# Driver Code

n = 19;

draw_triangle(n, n);

Output:-  

# Driver Code n = 19;| draw_triangle(n, n);

Chất xơ có nhiều trong thực phẩm nào?

Answers

Answer: rau củ quả đều có lượng chất xơ nhiều hơn so với các loại thực phẩn khác

Explanation:

Select the correct statement(s) regarding IP addressing.
a. IPv4 and IPv6 addressing is fully compatible with one another.
b. CIDR address format represents a Class C network only used within an intranet.
c. Subnet masks are used with both class and classless IP addresses.
d. all statements are correct.

Answers

Yeah the answer is b

Subnet masks are used with both class and classless IP addresses is the correct statement. Therefore, the correct option is C.

What is an IP address?

A device on the internet or a local network may be identified by its IP address, which is a special address. The rules defining the format of data delivered over the internet or a local network are known as “Internet Protocol,” or IP.

Only C is correct, rest other statements are incorrect because:

a. IPv4 and IPv6 addressing is fully compatible with one another is incorrect. While IPv4 and IPv6 can coexist on the same network, they are not fully compatible with one another.

b. CIDR address format represents a Class C network only used within an intranet is incorrect. Classless Inter-Domain Routing (CIDR) is a technique used to allocate IP addresses more efficiently.

Therefore, subnet masks are used with both class and classless IP addresses is the correct statement. Therefore, the correct option is C.

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how did hitles rules in nazi germany exemplify totiltarian rule?

Answers

Answer:

hope this helps if not srry

Type the correct answer in the box. Spell all words correctly.
Which testing requires coding the test cases into a scripting language?
testing requires coding the test cases into a scripting language.

Answers

Answer:

sorry I forgot it

Explanation:

because I am now in a last position

T
N
O
?
You can insert only the row
only to
True or false

Answers

false

Explanation:

good luck bro

have a great day

Answer:

false

Explanation:

Write a program that creates an an array large enough to hold 200 test scores between 55 and 99. Use a Random Number to populate the array.Then do the following:1) Sort scores in ascending order.2) List your scores in rows of ten(10) values.3) Calculate the Mean for the distribution.4) Calculate the Variance for the distribution.5) Calculate the Median for the distribution.

Answers

Answer:

Explanation:

The following code is written in Python. It uses the numpy import to calculate all of the necessary values as requested in the question and the random import to generate random test scores. Once the array is populated using a for loop with random integers, the array is sorted and the Mean, Variance, and Median are calculated. Finally The sorted array is printed along with all the calculations. The program has been tested and the output can be seen below.

from random import randint

import numpy as np

test_scores = []

for x in range(200):

   test_scores.append(randint(55, 99))

sorted_test_scores = sorted(test_scores)

count = 0

print("Scores in Rows of 10: ", end="\n")

for score in sorted_test_scores:

   if count < 10:

       print(str(score), end= " ")

       count += 1

   else:

       print('\n' + str(score), end= " ")

       count = 1

mean = np.mean(sorted_test_scores)

variance = np.var(sorted_test_scores, dtype = np.float64)

median = np.median(sorted_test_scores)

print("\n")

print("Mean: " + str(mean), end="\n")

print("Variance: " + str(variance), end="\n")

print("Median: " + str(median), end="\n")

Code Example 17-1 class PayCalculator { private: int wages; public: PayCalculator& calculate_wages(double hours, double wages) { this->wages = hours * wages; return *this; } double get_wages() { return wages; } }; (Refer to Code Example 17-1.) What coding technique is illustrated by the following code? PayCalculator calc; double pay = calc.calculate_wages(40, 20.5).get_wages(); a. self-referencing b. function chaining c. dereferencing d. class chaining

Answers

Answer:

The answer is "Option b".

Explanation:

Function chaining is shown by this code, as the functions are called one after the other with one statement. Whenever you want to call a series of methods through an object, that technique is beneficial. Just because of that, you may give the same effect with less code and have a single given value only at top of the leash of operations.

hi, please help me.solution.​

Answers

Answer:

aahdbdnsjajaissjdjdhskakwjdhbebs

What are some 5 constraints in using multimedia in teaching​

Answers

Answer:

Explanation:

Technological resources, both hardware and software

Technological skills, for both the students and teacher

Time required to plan, design, develop, and evaluate multimedia activities

Production of multimedia is more expensive than others because it is made up of more than one medium.

Production of multimedia requires an electronic device, which may be relatively expensive.

Multimedia requires electricity to run, which adds to the cost of its use

There are constraints in using multimedia in teaching​; The Technological resources, both hardware and software Also, Technological skills, for both the students and teacher

What is a characteristic of multimedia?

A Multimedia system has four characteristics and they are use to deliver the content as well as the functionality.

The Multimedia system should be be computer controlled. The interface is interactive for their presentation and lastly the information should be in digital.

There are constraints in using multimedia in teaching​;

The Technological resources, both hardware and software

Also, Technological skills, for both the students and teacher

Since Time required to plan, design, develop, and evaluate multimedia activities

The Production of multimedia is more expensive than others because it is made up of more than one medium.

The Production of multimedia requires an electronic device, which may be relatively expensive.

The Multimedia requires electricity to run, which adds to the cost of its use.

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Write a program that randomly chooses among three different colors for displaying text on the screen. Use a loop to display 20 lines of text, each with a randomly chosen color. The probabilities for each color are to be as follows: white 30%, blue 10%, green 60%. Suggestion: Generate a random integer between 0 and 9. If the resulting integer falls in the range 0 to 2 (inclusive), choose white. If the integer equals to 3, choose blue. If the integer falls in the range 4 to 9 (inclusive), choose green. Test your program by running it ten times, each time observing whether the distribution of line colors appears to match the required probabilities.

Answers

INCLUDE Irvine32.inc

.data

msgIntro  byte "This is Your Name's fourth assembly extra credit program. Will randomly",0dh,0ah

        byte "choose between three different colors for displaying twenty lines of text,",0dh,0ah

        byte "each with a randomly chosen color. The color probabilities are as follows:",0dh,0ah

        byte "White=30%,Blue=10%,Green=60%.",0dh,0ah,0

msgOutput byte "Text printed with one of 3 randomly chosen colors",0

.code

main PROC

;

//Intro Message

      mov edx,OFFSET msgIntro  ;intro message into edx

      call WriteString         ;display msgIntro

      call Crlf                ;endl

      call WaitMsg             ;pause message

      call Clrscr              ;clear screen

      call Randomize           ;seed the random number generator

      mov edx, OFFSET msgOutput;line of text

      mov ecx, 20              ;counter (lines of text)

      L1:;//(Loop - Display Text 20 Times)

      call setRanColor         ;calls random color procedure

      call SetTextColor        ;calls the SetTextColor from library

      call WriteString         ;display line of text

      call Crlf                ;endl

      loop L1

exit

main ENDP

;--

setRanColor PROC

;

; Selects a color with the following probabilities:

; White = 30%, Blue = 10%, Green = 60%.

; Receives: nothing

; Returns: EAX = color chosen

;--

      mov eax, 10              ;range of random numbers (0-9)

      call RandomRange         ;EAX = Random Number

      .IF eax >= 4          ;if number is 4-9 (60%)

      mov eax, green           ;set text green

      .ELSEIF eax == 3         ;if number is 3 (10%)

      mov eax, blue            ;set text blue

      .ELSE                    ;number is 0-2 (30%)

      mov eax, white           ;set text white

      .ENDIF                   ;end statement

      ret

setRanColor ENDP

I wanna learn python but I don't know any websites that I can learn it online. Thanks for attention!

Answers

Answer:

https://www.codecademy.com/

Write a program that reads in an integer, and breaks it into a sequence of individual digits. Display each digit on a separate line. For example, the input 16384 is displayed as 1 6 3 8 4 You may assume that the input has no more than five digits and is not negative.

Answers

Answer:

The program in Python is as follows:

num = int(input())

for i in str(num):

   print(int(i))

Explanation:

This gets input for the number

num = int(input())

This converts the number to string and iterates through each element of the string

for i in str(num):

This prints individual digits

   print(int(i))

An error due to wrong input by the user

Answers

Answer:

when did it take place..

5. Which events is used to code on any form load
a) Form Text b) Form Code c) Form Load d) Form Data

Answers

Answer:

I think b is correct answer

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