Answer:
Explanation:
#include <stdarg.h>
main()
{
display("Hello", 4, 12, 13, 14, 44);
}
display(char *s,...)
{
va_list ptr;
va_start(ptr, s);
show(s,ptr);
}
show(char *t, va_list ptr1)
{
int a, n, i;
a=va_arg(ptr1, int);
for(i=0; i<a; i++)
{
n=va_arg(ptr1, int);
printf("\n%d", n);
}
}
Write a Python program square_root.py that asks a user for an integer n greater or equal to 1. The program should then print the square root of all the odd numbers between 1 and n (Including n if n is odd). Print the square roots rounded up with no more than two digits after the decimal point.
Answer:
import math
n = int(input("Enter n: "))
for number in range(1, n+1):
if number % 2 == 1:
print("{:.2f}".format(math.sqrt(number)), end=" ")
Explanation:
In order to calculate the square roots of the numbers, import math. Note that math.sqrt() calculates and gives the square root of the given number as a parameter
Ask the user to enter the n
Create a for loop that iterates from 1 to n+1 (Since n is included, you need to write n+1)
Inside the loop, check whether the number is odd or not using the if structure and modulo. If the number is odd, calculate its square root using the math.sqrt() and print the result with two digits after the decimal
If you fail a course as a MAIN (residency) course, you can repeat that course as either a MAIN (residency) or an online (IG or IIG) course.
A. True
B. False
Your dashboard should show the sum and average as two separate columns. If you use measure names as the column field, what should you use for the marks
Answer:
Hence the answer is a sum.
Explanation:
Here the statement shows that the dashboard should show the sum and average as two separate columns if we name measure names because the column field then for marks we'll use the sum. Since the sum displays the sum of the values of all the fields, which refers to the marks of the person.
Therefore the answer is a sum.
If we use measure names as the column field, we should use "the sum".
A set of cells that are support equipment on about a similar vertical line, is considered as a column.
Usually, the name of the user or a client represents a field column, while the total and sometimes even averaging columns in our dashboards or screen are different.When using a summation of total summary, perhaps the column field (title), as well as its amount and averaging marking, are indicated.The preceding reply is thus right.
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Which information can you apply to every page of your document with the page layout options?
header
conclusion
body
footer
introduction
Answer:
Header and footer
Explanation:
The page layout tab usually found in document programs such as Microsoft Word hold options used to configure several page options which is to be applied to a document. The page layout option gives users options to set page margins, orientation, page numbering, indentation and the other page layout options which is primarily how we would like our document to look like when printed. The page layout option also allows the insertion of a header and footer which is a note which can be written at the topmost and bottomost part of the document. Once, a header and footer option is selected, it is applied to every page of the document being worked on at the moment.
how to identify mistakes in a html code??
An e-mail program allows?
A. users to access and view web pages on the internet.
B. geographically separated people to transfer audio and video.
C. real-time exchange of messages or files with another online user.
D. transmission of messages and files via a network such as the internet.
Answer:
C
Explanation:
Real time exchange of messages or files with another online user
Giải thích mục đích của các thao tác open() và close().
Answer:
Which lan is it
Answer:
Đang học năm nhất trường TDT đúng k bạn :D
Explanation:
Carl is planning for a large advertising campaign his company will unveil. He is concerned that his current e-commerce server farm hosted in a public cloud will be overwhelmed and suffer performance problems. He is researching options to dynamically add capacity to the web server farm to handle the anticipated additional workload. You are brought in to consult with him on his options. What can you recommend as possible solutions
Answer:
Cloud Bursting
Explanation:
One of the best possible solutions for this scenario would be Cloud Bursting. This is a solution of using Cloud Server services to handle the server farm workload. The difference is that Cloud Bursting allows the company to use the Cloud services only when their own personal web server farms hit peak demand and can no longer handle the incoming demand. The excess demand is outsourced to the Cloud Server and lets them handle it dynamically without the company having to add any additional hardware to their server farm.
Use NAND operator to write; P or Q, and P -Q make an everyday implication sentence using only NAND
Answer:
Hence the answer is given as follows,
Explanation:
By using the NAND operator:-
P or Q and P -Q make an everyday implication sentence using the only NAND is given as,
A small company with 100 computers has hired you to install a local area network. All of the users perform functions like email, browsing and Office software. In addition, 25 of them also do a large number of client/server requests into a database system. Which local area network operating system would you recommend?
Answer:
Answer to the following question is as follows;
Explanation:
Windows 7 for 100 users and Windows 8.1 for 25 users are the best options since they both enable networking and active directory, and Windows 8.1 also offers Windows server capabilities.
Winxp would therefore work for $100, but it is unsupported and has no updates.
If you wish to go with open source, you can choose Ubuntu 16 or 18 or Linux.
Write a program in Cto define a structure Patient that has the following members
Answer:
Explanation:
The answer should be 1.16 or 61.1
A computer with a five-stage pipeline deals with conditional branches by stalling for the next three cycles after hitting one. How much does stalling hurt the performance if 20% of all instructions are conditional branches
Answer:
The stalling hurt the performance by 60%.
Explanation:
This can be calculated as follows:
Value of CPI ideally taken by pipeline = 1
From the question, we are given:
Stall frequency = 20%,
Number of frequency = 3
Therefore, we have:
Cycles per instruction (CPI) of the architecture = Value of CPI ideally taken by pipeline + (Stall frequency * Number of frequency) = 1 + (20% * 3) = 1.60
Amount by which the stalling hurt the performance = Cycles per instruction (CPI) of the architecture Value of CPI ideally taken by pipeline = 1 - 0.60 = 0.60, or 60%
Therefore, the stalling hurt the performance by 60%.
Which statement is NOT a source of threats?
a.
Poor management decisions, accidents and natural disasters.
b.
Data recovery
c.
financial mistakes
d.
loss of customers
Answer:
B
Explanation:
because data is phone business
How many fingers do you need to type floor
Answer:
About 0-1 fingers at minimum
Explanation:
you can type with your toes/elbow as well. Any body part really.
To type the word "floor" on a regular keyboard layout, you would generally need six fingers: three on your left hand and three on your right.
Your index finger (usually used for the "F" key) on your left hand would be utilised for the letter "f." Your middle finger (which is normally used for the "D" key) would be utilised for the letter "l."
Finally, your ring finger (which is normally used for the "S" key) would be utilised for the letter "o."
Your index finger (usually used for the "J" key) on your right hand would be utilised for the letter "o." Your middle finger (which is normally used for the "K" key) would be utilised for the second letter "o."
Finally, your ring finger (which is normally used for the "L" key) would be utilised for the letter "r."
Thus, on a typical keyboard layout, you would type the word "floor" with three fingers from each hand.
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Why is OS important in every data processing system?
Please Answer Fast!
Answer:
Functions of an operating system. An operating system provides three essential capabilities: It offers a UI through a CLI or GUI; it launches and manages the application execution; and it identifies and exposes system hardware resources to those applications -- typically, through a standardized API.
Explanation:
2.2 Write a program that uses input to prompt a user for their name and then welcomes them. Note that input will pop up a dialog box. Enter Sarah in the pop-up box when you are prompted so your output will match the desired output.
Answer:
Explanation:
The following program is written in Javascript. It creates a prompt that asks the user for his/her name and saves it in a variable called userName. Then it uses that variable to welcome the user. A test case is shown in the images below with the desired output.
let userName = prompt("Enter Your Name")
alert(`Hello ${userName}`)
Spending plans serve as a tool to analyze program execution, an indicator of potential problems, and a predictor of future program performance. True False
Answer:
True
Explanation:
Spending plans serve as a tool to analyze program execution, an indicator of potential problems, and a predictor of future program performance.
Write a recursive function that returns 1 if an array of size n is in sorted order and 0 otherwise. Note: If array a stores 3, 6, 7, 7, 12, then isSorted(a, 5) should return 1 . If array b stores 3, 4, 9, 8, then isSorted(b, 4) should return 0.int isSorted(int *array, int n){
Answer:
Here the code is given as follows,
Explanation:
Code:-
#include <stdio.h>
int isSorted(int *array, int n) {
if (n <= 1) {
return 1;
} else {
return isSorted(array, n-1) && array[n-2] <= array[n-1];
}
}
int main() {
int arr1[] = {3, 6, 7, 7, 12}, size1 = 5;
int arr2[] = {3, 4, 9, 8}, size2 = 4;
printf("%d\n", isSorted(arr1, size1));
printf("%d\n", isSorted(arr2, size2));
return 0;
}
Output:-
The subroutines/function calls you need to call to pass an application message down to the transport layer is called the
Answer:
"TCP/IP library" is the appropriate answer.
Explanation:
A communications protocol that always connects to yet another system or device and guarantees transmissions were also correctly converted to digital signals or received, is termed as TCP/IP.Technology can also do a variety of things on its own and. However, when you speak among each other devices' maximum throttle emerges.Which line could be added to the lesson plan to strengthen the teacher’s point?
Different languages and communication styles might hinder your ability to benefit from global learning.
The digital divide will likely prevent you from having a major impact in the global communications environment.
Language and cultural differences will likely make it too frustrating to have an effective learning experience.
Learning in a global community enables you to expand your horizons and learn new languages.
Answer:
ムダムダムダムダムダムダムダムダムダムダムダムダムダムダムダムダムダムダムダムダムダムダムダムダムダムダムダムダムダムダムダムダムダムダムダムダムダムダムダムダムダ
Answer:
Learning in a global community enables you to expand your horizons and learn new languages.
Explanation:
Im not sure what the teacher's point is, but the other options seem to hinder students from wanting to learn in a global community. If her goal is to convince students to learn globally then option D is your answer :)
You want to calculate a bonus if the sold price was at least equal to the listing price, and if the house sold within 30 days after being listed.
In cell L12, insert an IF function with a nested AND function to calculate a bonus. The AND function should ensure both conditions are met: Sold Price divided by the Listing Price is greater than or equal to 100% (cell L7) and the Days on Market are less than or equal to 30 (cell L8). If both conditions are met, the bonus is $1,000 (cell L9). Otherwise, the bonus is $0. Use mixed cell references to the input values in the range L7:L9. Copy the function to the range L12:L39.
BA Average Total Sold Highest 1 Location Sold Price Number Sold Dual Agent Total Sol Prices Sold Price Agent Codes and Commission Rates 2 Alpine Carey Buyer's Agent 2.75% 3 American Fork Hernandez DA Dual Agency 5.50% 4 Cedar Hills Pijuan SA Seller's Agent 3.25% 5 Lehi 6 Total Commission by Agent Input for Bonus 7 Carey Percent of List 100% 8 Hernandez Days on Market 30 9 Pijuan Bonus Amount $ 1,000 10 Days on Agent Number City Selling Agen Agent Type Agent Type List Price Sold Price Listing Date Sale Date Bonus 11 Market Commissio 12 1 Cedar Hills Pijuan DA Dual Agency $ 725,000 $ 705,000 4/1/2021 76 6/16/2021 13 4 Lehi Pijuan DA Dual Agency $ 350,799 $ 350,000 4/1/2021 5/25/2021 54 14 5 American Fork Pijuan DA Dual Agency $ 29 385,900 $ 385,900 4/1/2021 4/30/2021 15 6 Alpine Carey SA Seller's Agent $ 500,000 $ 495,800 68 4/3/2021 6/10/2021 16 7 Lehi Pijuan BA Buyer's Agent $ 345,999 $ 345,000 4/3/2021 59 6/1/2021 17 11 American Fork Hernandez DA Dual Agency $ 325,000 $ 320,000 48 4/12/2021 5/30/2021 18 Alpine 12 Pijuan DA Dual Agency $ 750,250 $ 725,900 4/12/2021 11/1/2021 203 19 $ DA 17 Alpine Dual Agency $ Carey 645,000 66 643,000 4/18/2021 6/23/2021 20 19 American Fork Pijuan BA Buyer's Agent $ 425,000 $ 415,000 4/18/2021 6/30/2021 73 21 21 Lehi Pijuan SA Seller's Agent $ 325,000 $ 330,000 4/28/2021 6/1/2021 34 22 24 American Fork Pijuan SA Seller's Agent $ 425,815 $ 418,000 4/28/2021 140 9/15/2021 23 27 Alpine DA Pijuan Dual Agency $ 700,000 $ 705,000 4/30/2021 6/19/2021 50 24 30 Lehi Hernandez SA Seller's Agent $ 365,000 $ 363,000 5/1/2021 6/18/2021 48 25 32 Cedar Hills Carey SA Seller's Agent $ 885,500 $ 800,000 5/1/2021 6/6/2021 36 26 34 Cedar Hills Carey SA Seller's Agent $ 610,000 $ 600,000 5/1/2021 6/26/2021 56 27 35 Cedar Hills Hernandez DA Dual Agency $ 560,700 $ 565,000 5/1/2021 5/30/2021 29 29 36 American Fork Hernandez BA . Buyer's Agent $ 450,000 $ 450,000 5/2/2021 9/30/2021 151 29 43 American Fork Carey BA 9 Buyer's Agent $ 375,000 $ 372,500 5/6/2021 5/15/2021 30 46 Cedar Hills Carey SA Seller's Agent $ 650,000 $ 625,750 5/15/2021 679/2021 25 48 31 Alpine Hernandez DA Dual Agency $ 545,000 $ 560,000 5/22/2021 6/16/2021 25 32 Lehi 53 Carey SA Seller's Agent $ 315,750 $ 320,000 5/28/2021 6/18/2021 21 33 61 Lehi Carey DA Dual Agency $ 300,000 $ 300,000 6/2/2021 9/2/2021 92 34 Alpine 69 Hernandez DA Dual Agency $ 589,000 $ 595,000 20 6/18/2021 7/8/2021 35 70 American Fork Hernandez DA Dual Agency $ 345,670 $ 102 345,000 6/20/2021 9/30/2021 36 73 Cedar Hills Carey BA Buyer's agent $ 555,000 $ 550,000 6 6/24/2021 6/30/2021 37 75 Alpine Carey BA Buyer's Agent $ 475,000 $ 485,000 86 6/24/2021 9/18/2021 38 78 American Fork Carey DA Dual Agency $ 400,000 $ 15 400,000 6/30/2021 7/15/2021 39 80 American Fork Pijuan SA Seller's Agent $ 380,500 $ 365,750 6/30/2021 63 9/1/2021 40 41 42 43 44 Details Map Loan +
Answer:
Following are the solution to the given question:
Explanation:
Please find the following Excel form for calculating the bonus as required. Please ensure the equation is duplicated even so, with the sign "=." It is possible to insert this formula into cell L12. Then cut/paste the cell into other L12:L39 cells.
[tex]=IF(AND(G12/F12 \geq \$L \$7,J12 \leq \$L\$8)=TRUE,\$L\$9,0)[/tex]
The mixed microbial reference here is used in L7, L8, and L9 so these cell references are not moved whenever the formula is copied to L12:L39.
Please verify that whenever the copy has also been copied, the cell formula appears beneath in each cell.
It must be as below in L12.
[tex]=IF(AND(G12/F12 \geq \$L\$7,J12\leq \$L\$8)=TRUE,\$L\$9,0)[/tex]
It must be as follows in L13.
[tex]=IF(AND(G13/F13\geq \$L\$7,J13\leq \$L\$8)=TRUE,\$L\$9,0)[/tex]
and so on.
You work in an office that uses Linux and Windows servers. The network uses the IP protocol. You are sitting at a Windows workstation. An application you are using is unable to connect to a Windows server named FileSrv2. Which command can you use to determine whether your computer can still contact the server?
Answer:
PING
Explanation:
To check if there's still connectivity between the computer and server, I would use the ping command.
The ping command is primarily a TCP/IP command. What this command does is to troubleshoot shoot. It troubleshoots connection and reachability. This command also does the work of testing the name of the computer and also its IP address.
How would you type the word floor
Answer:
f l o o r
Explanation:
How can an Outlook user search for contacts? Check all that apply.
the Search bar located above the list of contacts
the Search People bar on the Find command group
the Search People located on the People navigation icon
CTL + E to activate the search contacts box
advanced Find under the Search tab
the options menu in the backstage view
Answer: the Search bar located above the list of contacts.
the Search People bar on the Find command group.
the Search People located on the People navigation icon.
CTL + E to activate the search contacts box.
advanced Find under the Search tab.
Explanation:
An Outlook user can search for contacts through the following ways:
• the Search bar located above the list of contacts.
• the Search People bar on the Find command group.
• the Search People located on the People navigation icon.
• CTL + E to activate the search contacts box.
• advanced Find under the Search tab.
Therefore, the correct options are A, B, C, D and E.
you are installing two new hard drives into your network attached storage device your director asks that they be put into a raid solution that offers redundndancy over performance which would you use
Question options:
a. RAID 0
b. RAID 1
c. RAID 5
d. RAID 6
e. RAID 10
Answer:
d. RAID 6
Explanation:
RAID is Redundant Array of Inexpensive/Independent Disks. RAID combines low cost physical hard disk drives in one hard disk drive. RAID is used to achieve data redundancy(data backup but with synchronization) or improved performance or both.
To get what the director requires he would need to use RAID 6. RAID 6 is RAID level optimized to achieve data redundancy but with slow performance.
Write the name of test for the given scenario. Justify your answer.
The input values are entered according to the output values. If the results are ok then software is also fine but if results does not matched the input values then means any bugs are found which results the software is not ok. The whole software is checked against one input.
A-Assume you are being hired as a Scrum project Manager. Write down the list of responsibilities you are going to perform.
B-What are the qualifications required to conduct a glass box testing.
C-Write the main reasons of project failure and success according to the 1994 Standish group survey study.
D- Discuss your semester project.
Answer:
Cevap b okey xx
Explanation:
Sinyorrr
9.17 LAB: Acronyms An acronym is a word formed from the initial letters of words in a set phrase. Write a program whose input is a phrase and whose output is an acronym of the input. If a word begins with a lower case letter, don't include that letter in the acronym. Assume there will be at least one upper case letter in the input.
Answer:
Hence the code is given as follows,
import java.util.Scanner;
public class LabProgram {
public static String createAcronym(String userPhrase){
String result = "";
String splits[] = userPhrase.split(" ");
for(int i = 0;i<splits.length;i++){
if(splits[i].charAt(0)>='A' && splits[i].charAt(0)<='Z')
result += splits[i].charAt(0);
}
return result;
}
public static void main(String[] args) {
Scanner scan = new Scanner(System.in);
String s = scan.nextLine();
System.out.println(createAcronym(s));
}
}
I need the SQL statements for these questions:
1. For each reservation, list the reservation ID, trip ID, customer number, and customer last name. Order the results by customer last name.
2. For each reservation for customer Ryan Goff, list the reservation ID, trip ID, and number of persons.
3. List the trip name of each trip that has Miles Abrams as a guide.
4. List the trip name of each trip that has the type Biking and that has Rita Boyers as a guide.
5. For each reservation that has a trip date of July 23, 2016, list the customer’s last name, the trip name, and the start location.
6. List the reservation ID, trip ID, and trip date for reservations for a trip in Maine (ME). Use the IN operator in your query.
7. Repeat Exercise 6, but this time use the EXISTS operator in your query.
8. Find the guide last name and guide first name of all guides who can lead a paddling trip. (Note: The query results should include duplicate values.)
Here are the tables:
CUSTOMER FIRST NAME POSTAL CODE CUSTOMER NUM LAST NAME ADDRESS Northfold Liam 9 Old Mill Rd Londonderry 10 NH 03053 103 Kasuma Sujata 132 Main St. #1 East Hartford CT 06108 MA 01854 Goff 164A South Bend Rd. Lowell Ryan 105 McLean Kyle 345 Lower Ave. Wolcott NY 14590 106 Morontoia Joseph 156 Scholar St Johnston 02919 107 Marchand Quinn 76 Cross Rd Bath NH 03740 108 32 Sheep stop St Edinboro PA Rulf Usch 16412 109 Caron Jean Luc 10 Greenfield St Rome ME 04963 110 Martha York Bers 65 Granite St NY 14592 112 Jones Laura 373 Highland Ave. Somerville MA 02143 115 Nu Adam 1282 Ocean Walk Ocean City Vaccari 08226 116 Murakami Iris 7 Cherry Blossom St. Weymouth MA 02188 119 Londonderry vT Chau 18 Ark Ledge Ln Clement 05148 120 Gernowski Sadie 24 stump Rd. Athens ME 04912 121 Cambridge VT Bretton-Borak Siam 10 Old Main St 122 Hefferson orlagh 132 South St. Apt 27 Manchester NH 03101 123 25 Stag Rd Fairfield Barnett Larry 06824 124 Busa Karen 12 Foster St. South Windsor CT 06074 125 51 Fredrick St Albion Peterson Becca NY 14411 126 Brown Brianne 154 Central St Vernon CT 06066 PHONE Click to Add 603-555-7563 413-555-3212 860-555-0703 781-555-8423 585-555-5321 401-555-4848 603-555-0456 814-555-5521 207-555-9643 585-555-0111 857-555-6258 609-555-5231 617-555-6665 802-555-3096 207-555-4507 802-555-3443 603-555-3476 860-555-9876 857-555-5532. 585-555-0900 860-555-3234
Answer:
Explanation:
/* From the information provided, For now will consider the name of table as TRIPGUIDES*/
/*In all the answers below, the syntax is based on Oracle SQL. In case of usage of other database queries, answer may vary to some extent*/
1.
Select R.Reservation_ID, R.Trip_ID , C.Customer_Num,C.Last_Name from Reservation R, Customer C where C.Customer_Num=R.Customer_Num ORDER BY C.Last_Name
/*idea is to select the join the two tables by comparing customer_id field in two tables as it is the only field which is common and then print the desired result later ordering by last name to get the results in sorted order*/
2.
Select R.Reservation_ID, R.Trip_ID , R.NUM_PERSONS from Reservation R, Customer C where C.Customer_Num=R.Customer_Num and C.LAST_NAME='Goff' and C.FIRST_NAME='Ryan'
/*Here, the explaination will be similar to the first query. Choose the desired columns from the tables, and join the two tables by equating the common field
*/
3.
Select T.TRIP_NAME from TRIP T,GUIDE G,TRIPGUIDES TG where T.TRIP_ID=TG.TRIP_ID and TG.GUIDE_NUM=G.GUIDE_NUM and G.LAST_NAME='Abrams' and G.FIRST_NAME='Miles'
/*
Here,we choose three tables TRIP,GUIDE and TRIPGUIDES. Here we selected those trips where we have guides as Miles Abrms in the GUIDES table and equated Trip_id from TRIPGUIDES to TRIP.TRIP_Name so that can have the desired results
*/
4.
Select T.TRIP_NAME
from TRIP T,TRIPGUIDES TG ,G.GUIDE
where T.TRIP_ID=TG.TRIP_ID and T.TYPE='Biking' and TG.GUIDE_NUM=G.GUIDE_NUM and G.LAST_NAME='Boyers' and G.FIRST_NAME='Rita'
/*
In the above question, we first selected the trip name from trip table. To put the condition we first make sure that all the three tables are connected properly. In order to do so, we have equated Guide_nums in guide and tripguides. and also equated trip_id in tripguides and trip. Then we equated names from guide tables and type from trip table for the desired results.
*/
5.
SELECT C.LAST_NAME , T.TRIP_NAME , T.START_LOCATION FROM CUSTOMER C, TRIP T, RESERVATION R WHERE R.TRIP_DATE='2016-07-23' AND T.TRIP_ID=R.TRIP_ID AND C.CUSTOMER_NUM=R.CUSTOMER_NUM
/*
The explaination for this one will be equivalent to the previous question where we just equated the desired columns where we equiated the desired columns in respective fields and also equated the common entities like trip ids and customer ids so that can join tables properly
*/
/*The comparison of dates in SQL depends on the format in which they are stored. In the upper case if the
dates are stored in the format as YYYY-MM-DD, then the above query mentioned will work. In case dates are stored in the form of a string then the following query will work.
SELECT C.LAST_NAME , T.TRIP_NAME , T.START_LOCATION FROM CUSTOMER C, TRIP T, RESERVATION R WHERE R.TRIP_DATE='7/23/2016' AND T.TRIP_ID=R.TRIP_ID AND C.CUSTOMER_NUM=R.CUSTOMER_NUM
*/
6.
Select R.RESERVATION_ID, R.TRIP_ID,R.TRIP_DATE FROM RESERVATION R WHERE R.TRIP_ID IN
{SELECT TRIP_ID FROM TRIP T WHERE STATE='ME'}
/*
In the above question, we firstly extracted all the trip id's which are having locations as maine. Now we have the list of all the trip_id's that have location maine. Now we just need to extract the reservation ids for the same which can be trivally done by simply using the in clause stating print all the tuples whose id's are there in the list of inner query. Remember, IN always checks in the set of values.
*/
7.
Select R.RESERVATION_ID, R.TRIP_ID,R.TRIP_DATE FROM RESERVATION WHERE
EXISTS {SELECT TRIP_ID FROM TRIP T WHERE STATE='ME' and R.TRIP_ID=T.TRIP_ID}
/*
Unlike IN, Exist returns either true or false based on existance of any tuple in the condition provided. In the question above, firstly we checked for the possibilities if there is a trip in state ME and TRIP_IDs are common. Then we selected reservation ID, trip ID and Trip dates for all queries that returns true for inner query
*/
8.
SELECT G.LAST_NAME,G.FIRST_NAME FROM GUIDE WHERE G.GUIDE_NUM IN
{
SELECT DISTINCT TG.GUIDE_NUM FROM TRIPGUIDES TG WHERE TG.TRIPID IN {
SELECT T.TRIP_ID FROM TRIP T WHERE T.TYPE='Paddling'
}
}
/*
We have used here double nested IN queries. Firstly we selected all the trips which had paddling type (from the inner most queries). Using the same, we get the list of guides,(basically got the list of guide_numbers) of all the guides eds which were on trips with trip id we got from the inner most queries. Now that we have all the guide_Nums that were on trip with type paddling, we can simply use the query select last name and first name of all the guides which are having guide nums in the list returned by middle query.
*/
Write a class Example() such that it has a method that gives the difference between the size of strings when the '-' (subtraction) symbol is used between the two objects of the class. Additionally, implement a method that returns True if object 1 is greater than object 2 and False otherwise when the (>) (greater than) symbol is used. For example: obj1
Answer:
Here the code is given as follows,
Explanation:
class Example:
def _init_(self, val):
self.val = val
def _gt_(self, other):
return self.val > other.val
def _sub_(self,other):
return abs(len(self.val) - len(other.val))
def main():
obj1 = Example('this is a string')
obj2 = Example('this is another one')
print(obj1 > obj2)
print(obj1 - obj2)
main()
Output:-
The importance of the 8 functions of an operating system
Answer:
Explanation:
Important functions of an operating System:
Security –
The operating system uses password protection to protect user data and similar other techniques. it also prevents unauthorized access to programs and user data.
Control over system performance –
Monitors overall system health to help improve performance. records the response time between service requests and system response to have a complete view of the system health. This can help improve performance by providing important information needed to troubleshoot problems.
Job accounting –
Operating system Keeps track of time and resources used by various tasks and users, this information can be used to track resource usage for a particular user or group of user.
Error detecting aids –
Operating system constantly monitors the system to detect errors and avoid the malfunctioning of computer system.
Coordination between other software and users –
Operating systems also coordinate and assign interpreters, compilers, assemblers and other software to the various users of the computer systems.
Memory Management –
The operating system manages the Primary Memory or Main Memory. Main memory is made up of a large array of bytes or words where each byte or word is assigned a certain address. Main memory is a fast storage and it can be accessed directly by the CPU. For a program to be executed, it should be first loaded in the main memory. An Operating System performs the following activities for memory management:
It keeps tracks of primary memory, i.e., which bytes of memory are used by which user program. The memory addresses that have already been allocated and the memory addresses of the memory that has not yet been used. In multi programming, the OS decides the order in which process are granted access to memory, and for how long. It Allocates the memory to a process when the process requests it and deallocates the memory when the process has terminated or is performing an I/O operation.
Processor Management –
In a multi programming environment, the OS decides the order in which processes have access to the processor, and how much processing time each process has. This function of OS is called process scheduling. An Operating System performs the following activities for processor management.
Keeps tracks of the status of processes. The program which perform this task is known as traffic controller. Allocates the CPU that is processor to a process. De-allocates processor when a process is no more required.
Device Management –
An OS manages device communication via their respective drivers. It performs the following activities for device management. Keeps tracks of all devices connected to system. designates a program responsible for every device known as the Input/Output controller. Decides which process gets access to a certain device and for how long. Allocates devices in an effective and efficient way. Deallocates devices when they are no longer required.
File Management –
A file system is organized into directories for efficient or easy navigation and usage. These directories may contain other directories and other files. An Operating System carries out the following file management activities. It keeps track of where information is stored, user access settings and status of every file and more… These facilities are collectively known as the file system.
