Question 14 0.5 pts Consider the following query. What step will take the longest execution time? SELECT empName FROM staffinfo WHERE EMPNo LIKE 'E9\%' ORDER BY empName; Retrieve all records using full-table scan Execute WHERE condition Execute ORDER By clause to sort data in-memory Given information is insufficient to determine it Do the query optimisation
Answers
In the given query "SELECT empName FROM staff info WHERE EMPNo LIKE 'E9\%' ORDER BY empName", the step that will take the longest execution time is the Execute ORDER BY clause to sort data in memory.
1. Retrieve all records using full-table scan: This step involves scanning the entire table and retrieving all records that match the condition specified in the WHERE clause. This step can be time-consuming, depending on the size of the table.
2. Execute WHERE condition: After retrieving all records from the table, the next step is to apply the condition specified in the WHERE clause. This step involves filtering out the records that do not match the condition. This step is usually faster than the first step because the number of records to be filtered is smaller.
3. Execute the ORDER BY clause to sort data in memory: This step involves sorting the filtered records in memory based on the criteria specified in the ORDER BY clause. This step can be time-consuming, especially if the table has a large number of records and/or the ORDER BY criteria involve complex calculations.
4. Given information is insufficient to determine it: This option can be eliminated as it is not applicable to this query.
5. Do the query optimization: This option suggests that the query can be optimized to improve its performance. However, it does not provide any insight into which step will take the longest execution time.
In conclusion, the Execute ORDER BY clause to sort data in memory will take the longest execution time.
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Related Questions
the ___ are documents which uses http ?
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Consider the two following set of functional dependencies: F= {B -> CE, E - >D, E -> CD, B -> CE, B -> A) and G= {E -> CD, B -> AE}. Answer: Are they equivalent? Give a "yes" or "no" answer.
Answers
Yes, the two sets of functional dependencies F and G are equivalent. To determine this, we can use the concepts of closure and canonical cover.
First, find the canonical cover for F (F_c) and G (G_c). Since both sets contain redundant dependencies (F has B -> CE twice and G has E -> CD in both sets), we can remove the duplicates. This gives us F_c = {B -> CE, E -> D, E -> CD, B -> A} and G_c = {E -> CD, B -> AE}.
Next, we need to check if the closure of F_c (F_c+) can cover G_c and vice versa. Using the Armstrong's axioms, we find that F_c+ can derive E -> CD and B -> AE, which are the dependencies in G_c. Similarly, G_c+ can derive B -> CE, E -> D, E -> CD, and B -> A, which are the dependencies in F_c.
Since the closure of both sets can cover the other set, F and G are equivalent.
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1. What type of malware is triggered by a specific condition, such as a specific date or a particular user account being disabled?
Select one:
Backdoor
Rootkit
Logic Bomb
Trojan Horse
Answers
Answer:
it would be logic bomb.
Explanation:
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Anusha wants to use her computer,rather than handwriting the information on her notepad,to analyze her monthly expenses to make the job easier.Which of the following apps should she use?
A) A word processor app to keep a record of her expenses and make calculations
B) A personal interest app to keep a track of all the expenses based on her personal interests
C) A device management app to track all the expenses she makes using her credit and debit cards
D) A spreadsheet app to keep a record of her expenses,sort data,and make calculations
Answers
Answer:
C. A device management app to track all the expenses she makes using her credit and debit cards
Explanation:
It'd be smart to use a developed app that was programmed to store expenses.
Anusha wants to use her computer, rather than handwriting the information on her notepad. The following app should she use is a spreadsheet app to keep a record of her expenses, sort data, and make calculations. D is the correct option.
What is a spreadsheet?The spreadsheet is a sheet with many cells, it is a function of Microsoft Excel. It is used to store information, and numbers, and it is also used to calculate large calculations and to store large amounts of information.
Spreadsheets are of many uses, all the data of the students or employees can be stored in the spreadsheet with their numbers and with their salary expenses. It also contains many functions that can be used to do heavy calculations.
Therefore, the correct option is D) A spreadsheet app to keep a record of her expenses, sort data, and make calculations.
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I have a aline gaming laptop and it has ransome ware on it that wants 2000$ can i get it back????
Answers
Answer:
Umm
Explain
yea i think you can
Answer:
take out the Hard Drive or SSD and take it to a data recovery place. It should be much cheaper there. Maybe $100 or so.
Explanation:
a value stored in the ebx register can be sign extended into edx:ebx with the cdq instruction.. T/F
Answers
True. The value stored in the EBX register can be sign extended into EDX:EBX using the CDQ instruction.
The statement is true. In x86 assembly language, the CDQ instruction is used to perform sign extension on a value stored in the EBX register and store the result in the EDX:EBX register pair. The purpose of sign extension is to preserve the sign (positive or negative) of a value when it is extended to a wider register.
When the CDQ instruction is executed, the contents of the EBX register are examined. If the most significant bit (MSB) of EBX is 0, indicating a positive value, the EDX register is filled with zeroes. If the MSB of EBX is 1, indicating a negative value, the EDX register is filled with ones. This process effectively extends the sign of the value stored in EBX to the additional bits in EDX.
By using the CDQ instruction, a 32-bit signed value in EBX can be sign-extended to a 64-bit signed value in EDX:EBX, allowing for larger calculations and more precise arithmetic operations.
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Q2 Mr. Amit wants to buy a computer system and recently visited a newly opened electronic show room Called Impel Infosys. He wanted to find out about the computers but came out totally confused by the
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Amit realizes he needs a mouse, but he is unsure what for. Here's an explanation of why a mouse is required and descriptions of different types of mice:
What is the computer systemAmit acknowledges his requirement for a mouse, but remains uncertain about its intended use. Discover the reason why a mouse is necessary and explore diverse types of mice.
A computer system requires a mouse as a crucial tool for its input operations. Users can control graphical user interfaces (GUIs) by using a cursor to navigate the screen and make selections or adjustments to objects. The standard mouse comprises a pointing device and buttons that sense its motion.
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Mr. Amit wants to buy a computer system and recently visited a newly opened electronic show room Called Impel Infosys. He wanted to find out about the computers but came out totally confused by the "computerese" he heard. He has made a list of questions he needs answer and has come to you for help. Answer the question below: •Amit realizes he needs a mouse, but he is unsure what for. Explain why mouse is required and describe a mouse with a trackball, an infrared mouse, a mouse with a scroll wheel and cordless mouse. [10 Marks]
Choose the words that complete the sentences.
A_______
is used to edit raster images.
A_______
is used to edit vector images.
A_______
is used to control a scanner or digital camera.
Answers
Answer:
A paint application
is used to edit raster images.
A drawing application
is used to edit vector images.
A digitizing application
is used to control a scanner or digital camera.
Explanation:
got it right on edg
Give context-free grammars (CFGs) generating the following languages.
1. The set of strings over the alphabet Σ = {a, b} with more a’s than b’s
Answers
To generate a context-free grammar (CFG) for the language of strings over the alphabet Σ = {a, b} with more a's than b's, we can use the following production rules:
S -> aSb | aS | ε
Explanation of the production rules:
S -> aSb: This rule generates a string that starts with 'a', followed by the non-terminal symbol S, and ends with 'b'. This ensures that there is at least one 'a' and one 'b' in the generated string, maintaining the balance.
S -> aS: This rule generates a string that starts with 'a' followed by the non-terminal symbol S. This allows for the addition of more 'a's without the need for an immediate 'b', ensuring that there are more 'a's than 'b's.
S -> ε: This rule generates an empty string, which is needed as a base case to terminate the recursion.
By applying these production rules recursively, we can generate strings with more 'a's than 'b's over the alphabet {a, b}.
Example derivations:
S -> aSb -> aaSbb -> aab
S -> aS -> aaS -> aaaS -> aaaaS -> aaaaaSb -> aaaaaab
Using this CFG, we can generate a variety of strings with more 'a's than 'b's, allowing for flexibility and variation within the language.
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In this for loop, identify the loop control variable, the initialization statement, loop condition, the update statement, and the statement that updates the value of s
Answers
Answer:
Follows are the solution to these question:
Explanation:
Please find the complete question in the attached file.
For point a:
The "j" is the loop control variable that controls this loop
For point b:
The initialized statement for the given loop is "j = 1"
For point c:
The loop condition for the given loop is "j<=10" which indicates that the value of j is less than equal to 10.
For point d:
The loop given statement that updates the value of the s is "s = s+j*(j-1)".
In a response of approximately 50 words, explain why it would be essential for the successful A/V technician to participate in additional coursework, presentations and seminars offered by equipment manufacturers as well as annual conferences attended by colleagues in the industry.
Answers
Answer:
The role of an audiovisual technician are to service, operate, maintain and repair and set electronic equipment meant for meetings, concerts, webinars, teleconferences, presentation, television and radio broadcasting. Audio technicians playback video recordings, they improve set lighting they ensure proper graphics coordination and they mix audio sound boards making after-school activities essential to the audiovisual career development.
Explanation:
A malicious user in your organization was able to use the Trinity Rescue Kit to change the password on a department manager's computer in the finance department. The user was able to copy data containing bank account information and social security numbers. The user then destroyed the data by resetting the computer. The department manager was at lunch at the time and had enabled the lock screen to require a password to gain access to the computer. Which additional measure should the manager have taken to prevent data theft
Answers
Answer:
The answer is "The PC should be kept in a physically secure location".
Explanation:
In general, malicious users are hackers as well as malicious users. This user indicates that even a rogue worker, contractor, student, and another consumer who uses his sensitive rights is indeed a common word of violation of information in security circles and the headlines, and to manage the data from the theft the system should be on the physically secure location, that refers to any place, a room or a group of room within facilities of physical or staff security protocols that are sufficient to support the AI-based on LEIN and related Is a physically safe room.
. which use cases indicate that a non-relational database might be a better solution than a relational database?
Answers
Non-relational databases are better suited for storing large amounts of unstructured data and data with complex and changing relationships, as they do not require a predefined schema. They are also better suited for real-time data processing, as they can scale horizontally to handle large volumes of data.
Non-Relational Databases: A Better Solution Than Relational Databases For Certain Use CasesStoring large amounts of unstructured data such as documents, images, or videos.Storing data with complex and changing relationships, such as social networks.Collecting and analyzing large amounts of data in real-time, such as for online gaming.Working with data sets that require horizontal scalability, such as those that produce large volumes of data.Storing data with a high degree of availability and redundancy, such as for mission-critical applications.Non-relational databases are better for data with a high degree of availability and redundancy, as they are designed to be distributed across multiple servers for redundancy and high availability. They also provide better performance and scalability than a relational database, as they don’t require the same level of normalization and are easier to scale horizontally.
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HELP!!! 30 POINTS
CHOOSE THE TERM THAT MATCHES THE DEFINITION.
: a device that converts one voltage to another
: communication of binary data via the voltage level for each time interval
: the push that makes electrons move in a wire
: a device that uses voice recognition to provide a service
VOICE ASSISTANCE
VOLTAGE
ADAPTER
DIGITAL SIGNAL
Answers
Voice assitanc: a device that uses voice recognition | adapter: a device that converts one voltage to another | digital signal: communication of binary data via the voltage level | voltage: the push that makes electrons move in a wire
Explanation:
Answer:
Adapter: a device that converts one voltage to another
Digital signal: communication of binary data via the voltage level for each time interval
Voltage: the push that makes electrons move in a wire
Voice assistant: a device that uses voice recognition to provide a service
Explanation:
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which keyboard shortcut copies information to the clipboard?
Answers
Answer:
Ctrl+C for PC or Command+C for Mac
Which of the following are characteristics of distributed version control systems? Select 3 options.
Developers must be connected to the internet to make changes to the project files.
A full copy of all project files is stored on each developer’s computer.
Project files are maintained in a central repository.
It allows many developers to work on the same project from anywhere at the same time.
The process may require file locking, depending on file type.
Answers
Answer:
Explanation:
Distributed Version Control Systems are a must for any development team. Some of the characteristics of these systems include
Project files are maintained in a central repository.
It allows many developers to work on the same project from anywhere at the same time.
A full copy of all project files is stored on each developer’s computer.
It is somewhat similar to a Centralized Version Control system, with the main difference being that every team developer has a complete project copy in their own system. This allows them to work on the project without access to the internet. Instead, they make changes and update their own server version. This updated version later gets pushed to the centralized server.
Answer:
1. It allows many developers to work on the same project from anywhere at the same time.
2. Project files are maintained in a central repository.
3. A full copy of all project files is stored on each developer’s computer.
Explanation:
i did the assignment
in the internet protocol stack, the [ select ] is responsible for assembling user data to be sent.
Answers
In the internet protocol stack, the Transport Layer is responsible for assembling user data to be sent
What is Internet Protocol?The Internet Protocol (IP) is the communication protocol that is used to transmit data across the internet. It functions similarly to the postal service, in that it allows packets to be sent from one computer to another. The IP protocol is responsible for routing packets of data between different computers or networks on the internet
.Each packet contains both a header and a payload, with the header containing information about the packet itself and the payload containing the actual data that is being transmitted. The IP protocol stack is a set of layers that work together to transmit data across the internet. The Internet Protocol stack includes four primary layers: the Application Layer, Transport Layer, Internet Layer, and Network Interface Layer.
In the Internet Protocol stack, the Transport Layer is responsible for assembling user data to be sent. It is located between the Application Layer and the Internet Layer. The Transport Layer provides reliable, end-to-end communication between applications on different computers. The most common transport protocols are Transmission Control Protocol (TCP) and User Datagram Protocol (UDP).
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Choose the term that best matches each definition.
A
covers a small area like a home or building.
A
covers a large area like a city or country.
Answers
Answer:
Local Area Network ...LAN...
covers a small area like a home or building
Metropolitan Area Network ...MAN...
covers a area like city or county
Explanation:
Hope this will help
Answer:
A local area network covers a small area like a home or building.
A wide area network covers a large area like a city or country.
Explanation:
A local area network (LAN) is a network that covers a relatively small geographical area such as a home, office building, or school. Whereas a wide area network (WAN) is network that covers a large geographical area. The Internet is the world's largest WAN.
(Confirmed on EDGE)
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If the fluid level in a battery is below the separators
should be added but never add
Answers
a school principal trying to find out if parents will help buy new playground equipment shows digital leadership by.
A. asking the school board to ask parents
B. Creating a email survey for parents
C. Ordering the equipment and asking parents to contribute
D. Setting up a web conference for a small group of parents
Answers
Answer:
D. is the correct answer!
Answer:
B. Creating a email survey for parents
Explanation:
I did this on edg
what is the default margin size in a word document? a) one-inch. b) two-inch. c) three-inch. d) four-inch.
Answers
In most cases, when you open Microsoft Word, the margins will already be set to 1-inch. To be certain you have the margins set to 1-inch: Click on the Page Layout tab. Click on Margins to see a drop-down menu.
What is the default margin size in Word?In Word, each page automatically has a one-inch margin. You can customise or pick predefined margin settings, set margins for facing pages, allow extra margin house to allow for record binding, and trade how margins are measured.
What is 2 inch margin in Word?Using a Heading 1 fashion and enhancing the style to create the two-inch margin is the pleasant method for doing this. By adding 1 inch (or seventy two points) of extra area above the Heading 1, you combine the default one inch margin from the report with the one inch of extra area on the heading to create your two inches.
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Write a program that asks the user to enter a city name, and then prints Oh! CITY is a cool spot. Your program should repeat these steps until the user inputs Nope.
Sample Run:
Please enter a city name: (Nope to end) San Antonio
Oh! San Antonio is a cool spot.
Please enter a city name: (Nope to end) Los Angeles
Oh! Los Angeles is a cool spot.
Please enter a city name: (Nope to end) Portland
Oh! Portland is a cool spot.
Please enter a city name: (Nope to end) Miami
Oh! Miami is a cool spot.
Please enter a city name: (Nope to end) Nope
Answers
user_name = input("Please enter city name to run the program: ")
while( user_name != "Nope" ):
print("Nice to meet you ", user_name )
user_name = input("Please enter a name or type Nope to terminate the program: ")
I hope this helps!
You want to add together the contents of three cells in your spreadsheet: B1,
C3, and D5. Which three formulas could you use?
A. SUM(B1:C3:D5)
B. B1+C3+D5
C. B1*C3*D5
D. SUM(B1+C3+D5)
Answers
Answer:
B. B1+C3+D5
D. SUM(B1+C3+D5)
E. =B1+C3+D5
Explanation:
You are deploying VPN services behind a router that is not RFC 1541 compliant. What will you need to do to ensure that clients receive IPs from the DHCP server on the network
Answers
If the router is not RFC 1541 compliant, it means that it may not properly handle DHCP requests and responses, which could prevent clients from receiving IPs from the DHCP server.
To ensure that clients can still receive IPs from the DHCP server, you can take the following steps:
1. Check if the router has any DHCP-related settings that need to be configured or enabled. Some routers have DHCP relay or DHCP helper settings that can be used to forward DHCP requests to the DHCP server on the network.
2. If the router does not have any DHCP-related settings, you may need to replace it with a compliant router or add a compliant DHCP server to the network. This will ensure that DHCP requests are properly handled and that clients can receive IPs.
3. Another option is to configure the clients to use static IPs instead of DHCP. This can be time-consuming and may not be practical for larger networks, but it can be a temporary solution if replacing the router or adding a DHCP server is not an option.
The best solution would be to ensure that the router and DHCP server are RFC 1541 compliant to avoid any potential issues with clients not receiving IPs.
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Write an LMC program as follows instructions:
A) User to input a number (n)
B) Already store a number 113
C) Output number 113 in n times such as n=2, show 113
113.
D) add a comment with a details exp
Answers
The LMC program takes an input number (n) from the user, stores the number 113 in memory, and then outputs the number 113 n times.
The LMC program can be written as follows:
sql
Copy code
INP
STA 113
INP
LDA 113
OUT
SUB ONE
BRP LOOP
HLT
ONE DAT 1
Explanation:
A) The "INP" instruction is used to take input from the user and store it in the accumulator.
B) The "STA" instruction is used to store the number 113 in memory location 113.
C) The "INP" instruction is used to take input from the user again.
D) The "LDA" instruction loads the value from memory location 113 into the accumulator.
E) The "OUT" instruction outputs the value in the accumulator.
F) The "SUB" instruction subtracts 1 from the value in the accumulator.
G) The "BRP" instruction branches back to the "LOOP" label if the result of the subtraction is positive or zero.
H) The "HLT" instruction halts the program.
I) The "ONE" instruction defines a data value of 1.
The LMC program takes an input number (n) from the user, stores the number 113 in memory, and then outputs the number 113 n times.
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Are you able to connect a VPN to a Spectrum Internet modem or do you need a Router for that. Are routers better than modems?
Answers
Answer:
Yes
Explanation:
Spectrum Internet modems work very wells with VPNs.
Edhesive 2. 5 Coding Practice (we are using Python)
I have to copy and paste the following code and modify the code so that it asks the user to multiply two random numbers from 1 to 10 inclusive. I am unsure how to do this.
import random
random. Seed()
# TODO: Update the following two lines with a call to a function
# from the random library that generates a random number between
# 1 and 10, inclusive.
a = 6 # HINT: Replace 6 with a function call
b = 3 # HINT: Replace 3 with a function call
print ("What is: " + str(a) + " X " + str(b) + "?")
ans = int(input("Your answer: "))
if (a * b == ans):
print ("Correct!")
else:
print ("Incorrect!")
Answers
The following code will ask the user to multiply two random numbers from 1 to 10 inclusive. import random. Seed()a = random. r and int(1,10)b = random. r and int(1,10)print ("What is: " + str(a) + " X " + str(b) + "?") ans = int(input("Your answer: "))if (a * b == ans): print ("Correct!")else: print ("Incorrect!")
Explanation:From the above code, we know that the random library is used to generate a random number. random. Seed() is used to generate a seed that will ensure that a new random number is generated each time the code is run. The next step is to update the two lines of code to generate two random numbers between 1 and 10. The updated code is as follows:a = random. r and int(1,10) # Replace 6 with a function call b = random.r and int(1,10) # Replace 3 with a function call.
The print statement will output the question to the user, which will be "What is: x X y?", where x and y are random numbers between 1 and 10 inclusive. The user will be asked to input their answer to the question. The code then checks if the user's answer is correct or incorrect. If the answer is correct, the code outputs "Correct!". If the answer is incorrect, the code outputs "Incorrect!".
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Why do you need to install application program/software in your computer?
Answers
Answer:
Also called a "setup program" or "installer," it is software that prepares an application (software package) to run in the computer. Unless the application is a single function utility program, it is made up of many individual files that are often stored in several levels of folders in the user's computer.
Explanation:
Answer:
Why should you install operating system (OS) and software updates? Updates are "patches" that fix problems in your operating system (the basic program that runs your computer) or in applications and programs that you use. Unpatched computers are especially vulnerable to viruses and hackers.
Explanation:
As a Manager, you will find it difficult to operate on daily basis without a computer in your office and even at home. Evalauate this statement
Answers
As a manager, operating on a daily basis without a computer in both the office and at home would indeed pose significant challenges. Computers have become an essential tool in modern management practices, enabling efficient communication, data analysis, decision-making, and productivity enhancement.
In the office, a computer allows managers to access critical information, collaborate with team members, and utilize various software applications for tasks such as project management, financial analysis, and report generation. It provides a centralized platform for managing emails, scheduling meetings, and accessing company systems and databases.
Outside the office, a computer at home provides flexibility and convenience for remote work and staying connected. It enables managers to respond to urgent emails, review documents, and engage in virtual meetings. It also allows them to stay informed about industry trends, access online resources for professional development, and maintain a work-life balance through effective time management.
Without a computer, managers would face limitations in accessing and analyzing data, communicating efficiently, coordinating tasks, and making informed decisions. Their productivity and effectiveness may be compromised, and they may struggle to keep up with the demands of a fast-paced, technology-driven business environment.
In conclusion, a computer is an indispensable tool for managers, facilitating their daily operations, communication, and decision-making. Its absence would significantly impede their ability to perform their responsibilities effectively both in the office and at home.
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during a network reconnaissance exercise, chris gains access to a pc located in a secure network. if chris wants to locate database and web servers that the company uses, what command-line tool can he use to gather information about other systems on the local network without sending additional traffic?
Answers
Chris successfully logs into a PC that is connected to a secure network while doing network reconnaissance.
What do you meant by network reconnaissance?
Active reconnaissance tools are created to communicate with the target network's computers directly in order to gather information that might not be accessible in other ways.
Active reconnaissance can give a hacker considerably more specific knowledge about the target, but it also increases the chance of being caught. The goal of reconnaissance is to identify as many potential attack paths as possible. In order to collect data that may not be accessible in other ways, active reconnaissance technologies are designed to speak directly with the target network's machines.
Active reconnaissance can give a hacker considerably more specific knowledge about the target, but it also increases the chance of being caught.A variety of scan kinds that make use of the specifics of how a system or service functions are used to do this.
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