Consider the following grammar
S→aS∣bS∣T
T→Tc∣b∣ϵ

Prove that the grammar is ambiguous.

Answers

Answer 1

The given grammar is ambiguous, meaning that there exist multiple parse trees for at least one of its productions. This ambiguity arises due to the overlapping derivations of the nonterminal symbols S and T.

To demonstrate the ambiguity of the grammar, let's consider the production rules for S and T. The production rule S → aS allows for the derivation of strings composed of one or more 'a' followed by another S. Similarly, the production rule S → bS allows for the derivation of strings composed of one or more 'b' followed by another S. Additionally, the production rule S → T allows for the derivation of strings where S can be replaced by T. Now, let's focus on the production rule T → Tc. This rule allows for recursive derivations of 'Tc', which means that 'c' can be added to a string derived from T multiple times. As a result, there can be multiple parse trees for some inputs, making the grammar ambiguous.

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Related Questions

which of the following is true about system restore?

Answers

Answer:

Without knowing the specific statements that you are referring to, it is difficult to determine which statement is true about system restore. However, I can provide some general information about system restore in Windows operating systems.

Explanation:

System restore is a feature in Windows that allows you to restore your computer's system files and settings to an earlier point in time. This can be useful if your computer is experiencing problems, such as crashes or software errors, that you believe may have been caused by recent changes to your system.

Here are some statements that are generally true about system restore:

System restore creates restore points: When you use system restore, it creates a restore point that contains a snapshot of your computer's system files and settings at that point in time. You can then use this restore point to restore your computer's system files and settings to that specific point in time.

System restore does not affect personal files: When you use system restore to restore your computer's system files and settings, it does not affect your personal files, such as documents, photos, and music.

System restore is not a substitute for backup: While system restore can be useful for restoring your computer's system files and settings, it is not a substitute for backing up your personal files. It is always a good idea to regularly back up your important files to an external hard drive or cloud storage service.

System restore may not always work: System restore is not a guaranteed fix for all computer problems. In some cases, system restore may not be able to fix the problem you are experiencing, or it may even cause additional problems. It is always a good idea to try other troubleshooting steps before resorting to system restore.

if you wish to monitor a critical section of your network consisting of 20 hosts. what kind of idps would you use and where would you install it?

Answers

The recommended type of IDPS to monitor a critical section of a network consisting of 20 hosts is a network-based IDPS. The IDPS should be installed at the network perimeter to monitor all incoming and outgoing traffic to and from the network.

A network-based IDPS is designed to monitor and analyze network traffic in real-time. It can identify and block threats such as malware, viruses, and other attacks that can compromise the security of a network. By installing the IDPS at the network perimeter, it can monitor all incoming and outgoing traffic to and from the network. This allows the IDPS to quickly identify and respond to potential threats before they can cause any damage.

Overall, using a network-based IDPS is a great way to monitor a critical section of a network consisting of 20 hosts. Installing the IDPS at the network perimeter allows for comprehensive coverage of all incoming and outgoing traffic, helping to keep the network secure from potential threats.

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Which of the following are true statements about the Java wrapper classes (Select all that apply.): Select one or more: a. Objects of these type are immutable b. Objects of these types are mutable c. The wrapper classes do not have no-arg constructors d. The wrapper classes do have no-arg constructors

Answers

Answer:

a. Objects of these type are immutable.

Explanation:

Java wrapper classes are used to convert data into objects. The primitive data is not object and it does not belong to any class. Therefore Java wrapper classes help the user to convert primitive data into object. These objects are immutable and they have no arg constructor.

which founding principle in object-orented programming. emphasizes communication through controlled interfaces? information hiding abstraction encapsulation o modification

Answers

The correct answer is Information concealment places a strong emphasis on interface-controlled communication.

The four guiding concepts of object-oriented programming are polymorphism, inheritance, abstraction, and encapsulation. The four basic theoretical tenets of object-oriented programming are abstraction, encapsulation, polymorphism, and inheritance. According to the abstraction principle, every complex capacity has a unique set of abstract realisation patterns. Each abstract realisation pattern outlines how to break down a difficult capability into a group of easier ones. Encapsulation is a technique for preventing direct user access to some object components, preventing users from seeing the state values for all of an object's variables. Data members and data functions or methods connected to an instantiated class or object can both be concealed via encapsulation.

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the multiprocessor system which consists of a set of processors that share a common main memory and are under the integrated control of an operating system is a .

Answers

The multiprocessor system which consists of a set of processors that share a common main memory and are under the integrated control of an operating system is a Parallel Processing System.

A parallel processing system is a multiprocessor system consisting of multiple processors that communicate and work together to solve a particular computational problem. Parallel processing can be accomplished in several ways, including through shared memory architectures or distributed memory architectures.

A shared-memory architecture is a type of parallel processing architecture in which all processors share a single memory space, while a distributed-memory architecture is one in which each processor has its memory space. The processors in a parallel processing system can be connected to each other in a variety of ways, such as through a shared bus or a network connection.

A parallel processing system is used in many different applications, including scientific computing, video processing, and data analysis.

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. What type of device is a computer? Where does it use?​

Answers

Answer:

The answer to this question is given below in the explanation section.

Explanation:

Computer is an electronic and digital device. Computer can be used everywhere in our daily life. You can use a computer to search for something over the internet related to your study etc.

The following fields where you can see the use of computers.

EducationBusinessHospitalBanking sectorHomeMarketingGovernment officesetc

You can see the use of computers everywhere in our daily life.

the three biggest newspapers in which state offered their final print editions this week?

Answers

It is not clear which specific week is being referred to in the question, as there have been several instances of newspapers ending their print editions in different states at different times.

Ohio: The Cleveland Plain Dealer, the largest newspaper in Ohio, announced in April 2021 that it would no longer print a daily newspaper, instead focusing on digital journalism.Louisiana: The Times-Picayune, the primary newspaper in New Orleans, printed its final daily edition in May 2019, becoming a three-day-a-week publication. The newspaper later announced in 2020 that it would no longer print a physical newspaper at all, moving to a fully digital model.Oregon: The Oregonian, the largest newspaper in Oregon, announced in August 2021 that it would no longer print newspapers on Mondays, Tuesdays, and Thursdays, instead focusing on digital content. However, the newspaper will still continue to print physical newspapers on Wednesdays, Fridays, and Sundays.

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Which statement is not true for a good algorithm?
A. It is clear and cannot be interpreted in more than one way by
different people or machines.
B. It successfully solves the desired problem or performs the desired
task.
C. It can perform a task or solve a problem even if various inputs are
involved.
O D. It uses more resources and more time than it needs to.

Answers

Answer:

D. It uses more resources and more time than it needs to.

Explanation:

A, B, and C each show the workload of an algorithm in positive light. However, D shows it using more resources and time than it needs to; something a "good" algorithm would not do.

Discovery of a vulnerability in a software program can potentially be sold to the government. Group of answer choices True False

Answers

Discovery of any vulnerability in a software program can potentially be sold to the government: True.

What is vulnerability?

Vulnerability is any form of weakness, flaw or defect that is found in a software application, computer system, or network, which can be exploited by an attacker (hacker), in order to gain an unauthorized access and privileges to sensitive user data that are stored in a computer system.

This ultimately implies that, a vulnerability in a software application can potentially be sold to the government, so as to avert and mitigate any form of unauthorized access and privileges to sensitive user data.

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A ______ is a window that can remain open and visible while you work in the document.

Answers

Window that can remain open and visible while you work in the document is TASK PANE.

A " TASK PANE" is a window that can remain open and visible while you work on the document. It allows you to view different parts of the document simultaneously without closing or minimizing the window. Task panes are commonly used in productivity applications such as Microsoft Office, where they provide quick access to frequently used commands and tools. For example, in Microsoft Word, the task pane may display formatting options, a thesaurus, or a document outline. In Excel, the task pane may display chart options or a list of functions.

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a true classical orchestra employs only groups of woodwind, brass, and percussion.
T/F

Answers

The statement given "a true classical orchestra employs only groups of woodwind, brass, and percussion" is false because a  true classical orchestra employs not only groups of woodwind, brass, and percussion, but also string instruments such as violins, violas, cellos, and double basses.

The string section is a fundamental component of a classical orchestra and is typically the largest section. It provides the foundation and richness of sound, while the woodwind, brass, and percussion sections add color, texture, and depth to the overall musical arrangement. The combination of these sections creates the diverse range of sounds and timbres characteristic of a classical orchestra.

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What behavior do elements in a stack follow?

Answers

A stack operates on the LIFO (Last In First Out) principle, which states that the element inserted last is the first element to be removed. Inserting an element into the stack is known as a push operation, and removing an element from the stack is known as a pop operation.

Answer:

last in, first out, or LIFO behavior

Explanation:

B

Which type of operating system is usually used in personal computers?
А _____operating system is usually used in personal computers. This allows
_______ to perform multiple
tasks simultaneously.

Number 1:

Multi-user/multitasking

Single-user/multitasking

Single-user/single-tasking

Number 2:

Two user

A user

Multiple users

Answers

Answer

1st one is :multi-user/multi-tasking

2nd one is:two users

Explanation:

multi-user/multi-tasking

two users

What elements collect input?
What items display output?
Do you think there are elements that can do both?

Answers

Answer:

input devices : keyboard, touch , mouse

output devices : microphone monitor, printer

Cameras and Modem can be both output and input.

Which is the correct order of the stages of the information processing cycle?

Answers

Answer:

(1) input

(2) processing

(3) storage

(4) output

--------------------------

input has its own stages as well which are:

acquisition data entry validation

Which of the following best explains how symmetric encryption are typically used?

Answers

A: Symmetric encryption uses a single key that should be kept secret. The same key is used for both encryption and decryption of data.

The option that best  explains how symmetric encryption are typically used is; A: Symmetric encryption uses a single key that should be kept secret. The same key is used for both encryption and decryption of data.

Understanding Symmetric Encryption

Symmetric encryption is one of the oldest and best-known technique which makes use of secret key that could be a number, a word, or just a string of random letters, applied to the text of a message in order to change the content in a particular way.

Symmetric encryption involves the use of a key, which is known as the Symmetric Key which contains a series of numbers and letters.

Finally, Symmetric Key is used to encrypt a message as well as the same key is also used to decrypt it.

Looking at the given options from online, the correct option is A: Symmetric encryption uses a single key that should be kept secret. The same key is used for both encryption and decryption of data.

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Which of the following labor surplus tactics is likely to be the fastest in terms of helping companies meet their labor surplus needs? Select one: A. Hiring Freezes B. Employee Movement C. Layoffs D. Attrition

Answers

Out of the given options, layoffs are likely to be the fastest labor surplus tactic for companies.

Layoffs involve terminating employment contracts with employees, which can be implemented relatively quickly and effectively. It allows companies to reduce their labor force quickly to align with their current needs and economy situation.
Hiring freezes and employee movement may take more time to implement. Hiring freezes involve not filling vacant positions, which can take some time to become effective. Employee movement involves moving employees from one department to another to fill gaps, which may require training or re-skilling before they can effectively perform the new role. Therefore, it may not be the quickest solution for labor surplus issues.
Attrition is a slow and passive labor surplus tactic. It involves waiting for employees to leave the company naturally, such as through retirement, resignation or termination due to poor performance. This method may take years to achieve the desired level of reduction in the workforce.
In conclusion, layoffs are likely to be the fastest tactic to implement when a company needs to meet their labor surplus needs. However, companies should always consider the ethical implications of such actions and explore alternative strategies that prioritize retaining their workforce.

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A histogram titled Greeting card sales has date on the x-axis and cards (millions) on the y-axis. January is 1 card, February: 11, March: 1, April: 1, May: 9, June: 7, July: 1, August: 1, September: 1, October: 9, November: 7, December: 12. The histogram shows the monthly sales for a greeting card company in one year. Which best describes the data for May–June and October–December? clusters no frequency gaps symmetry

Answers

Answer:

Clusters

Explanation:

Given

The histogram

Required

What does May-June and October-December represents

The data for May-June is:

\(May: 9\)

\(June: 7\)

For October-December, it is:

\(October: 9\)

\(November: 7\)

\(December: 12\)

Notice that these data are close to each other.

This implies that they are clusters

Answer:

the answer is a

Explanation:

which of the following is an html-supported kind of path?

Answers

An html-supported kind of path is D.Both A and B (absolute, and relative).

What is HTML, and what purposes does it serve?

The language used to describe the organization of Web pages is called HTML. Authors can publish online documents containing headings, text, tables, lists, images, etc. thanks to HTML. Click a button to quickly access internet content using hypertext links.

The set of markup symbols or codes entered into a file intended for display on the Internet is known as HyperText Markup Language (HTML). The markup instructs web browsers on how to display the text and pictures on a web page.

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complete question;

which of the following is an html-supported kind of path?

A.absolute

B.relative

C.interpreted

D.Both A and B

Ana is a music lover. She loves to download songs and videos on her computer every time she hears a new song. One day, her computers started to malfunction, and all her files were no longer accessible. What do you think happened to Ana’s computer and what can you do to avoid the same problem​

answer pleasssseeee

Answers

Answer:

Storage outage

As many new songs are released to the Internet every day, Anna might have download thousands of them, which made her computer ran out of storage and RAM(random access memory )

What is power efficiency in computer architecture?

Answers

Power efficiency in computer architecture refers to the ability of a computer system to utilize power in a way that conserves energy while still delivering the desired performance.

This is especially important in modern computer systems as they have become more complex and consume more power than ever before. In order to achieve power efficiency, computer architects design hardware and software that can optimize the use of power while maintaining performance.

Some techniques used in achieving power efficiency include reducing clock frequency, lowering voltage levels, and implementing power management techniques such as sleep states and dynamic voltage scaling.

In summary, power efficiency is an important consideration in computer architecture as it helps reduce energy consumption and improve the overall sustainability of computer systems.

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Don is creating a very long document, and he would like to create an introductory page that contains the title of the document and the name of the author along with the date.

Answers

Answer:

This is a very good choice, to do so Don can insert a cover page. He can go to the options menu, pick the "insert" lash, and then to the "pages" square in the far left of the toolbox. There he will find a "cover page" section that will automatically add a cover page at the beginning of the document.

Explanation:

The reasons for this answer are that in the first place, it is very difficult to go o the first page of the document and move everything down because the format would be lost. Then, he would require to edit everything. It would also result in the same in case he only added a white page and started writing. So he needs a specific object that wouldn't damage the format if edited on the first page.

top 10 ways to survive squid game?

Answers

Answer:

dont d i e

Explanation:

ik

Answer: use tactics for the games, in rlgl, kinda runwalk so that you dont trip when the doll stops singing or says red light

in honey comb, lick the cookie

in tug of war, tie the rope around your back if you are the last in line

in marbles, if the normal version is not working for you, do the one you throw, its quite easy

in glass bridges, the tempered glass has a wavy reflection

in squid game, if your quick, do offense, if your strong, do defence and go near the triangle to narrow out the goal

Explanation: ive seen way too many tactic videos on yt

What is the Denary representation of this 8 bit number > 01001111 ?

Answers

The Denary representation of this 8 bit number 01001111 is 79.

Decimal number

A binary number is a number expressed in the base-2 numeral system or binary numeral system. Binary numbers are either 0 or 1.

The decimal numeral system is the standard system for denoting numbers. Decimals are a set of numbers lying between integers on a number line.

Converting the number 01001111 to decimal:

01001111 = (0 * 2)⁷ + (1 * 2)⁶ + (0 * 2)⁵ +  (0 * 2)⁴ +  (1 * 2)³ +  (1 * 2)² + (1 * 2)¹ + (1 * 2)⁰ = 79

The Denary representation of this 8 bit number 01001111 is 79.

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which of the following best describes a stateful inspection? answer determines the legitimacy of traffic based on the state of the connection from which the traffic originated. offers secure connectivity between many entities and uses encryption to provide an effective defense against sniffing. designed to sit between a host and a web server and communicate with the server on behalf of the host. allows all internal traffic to share a single public ip address when connecting to an outside entity.

Answers

The following statement best describes a stateful inspection: "Answer determines the legitimacy of traffic based on the state of the connection from which the traffic originated."

What is the explanation for the above response?



Stateful inspection is a firewall technology that analyzes the state and context of network connections to determine whether incoming traffic is legitimate or not. It examines the entire packet, including the source and destination addresses, ports, and the packet's contents, to verify that the traffic belongs to an established and authorized connection.

This method is more secure than simple packet filtering, which only looks at the header information of a packet.

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Changing the position of the wing will

Answers

Answer:

will cause error in your pc many many many

Answer:

change the center of gravity and neutral point

Explanation:

Make each word to its correct meaning baiting click-jacking cross-site scripting

Answers

Answer:

Explanation:

Sure! Here are the correct meanings for the given terms:

1. Baiting: Baiting refers to the act of enticing or luring someone into a trap or a specific action, often through deception or manipulation.

2. Click-jacking: Click-jacking is a technique used by malicious actors to trick users into clicking on a seemingly innocent element or link on a webpage, which actually performs a hidden action or leads the user to unintended destinations. It is designed to deceive and hijack the user's clicks for nefarious purposes.

3. Cross-site scripting: Cross-site scripting (XSS) is a security vulnerability that occurs when an attacker injects malicious scripts into a trusted website or web application. When other users visit the affected site, the injected scripts can execute on their browsers, potentially allowing the attacker to steal sensitive information, perform unauthorized actions, or manipulate the website's content.

I hope this clarifies the meanings of the terms "baiting," "click-jacking," and "cross-site scripting" for you.

Brainy users come back and answer some questions some of us really need help get your ponits today and you will feel good mean while you answer questions other people might have.!

Answers

Answer:

of course we will answer any question at any time

of the following, why is it recommended that when using encrypting file system (efs), that folder encryption be used rather than file-level encryption?

Answers

Folder encryption is recommended over file-level encryption in EFS because it is more efficient and less prone to user error, as all files within a folder are automatically encrypted and decrypted.

File-level encryption can lead to situations where a user forgets to encrypt a sensitive file, and it is left unencrypted on the system. Additionally, managing encrypted files at the individual file level can be time-consuming and prone to human error.

With folder encryption, all files within the encrypted folder are automatically encrypted and decrypted, eliminating the possibility of a sensitive file being left unencrypted and simplifying encryption management. Additionally, folder encryption can be more efficient as it only requires a single encryption key per folder, rather than a unique encryption key for each file.

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por que se dice que las TIC´S son las integracion de las TI y las TC?

Answers

La respuesta correcta para esta pregunta abierta es la siguiente.

A pesar de que no se anexan opciones o incisos para responder, podemos comentar lo siguiente.

Se dice que las TIC´S son las integración de las TI y las TC porque ambas actividades se han integrado o fusionado en una solo concepto al momento de juntar las herramientas tecnológicas para almacenar, procesar y mandar información a través de los recursos tecnológicos utilizando los canales o recursos de los medios masivas de comunicación como lo son las redes satelitales o las comunicaciones vía microondas.

Al fusionarse las TI (Tecnologías de la Información) con las TC (Tecnologías de Comunicación), se maximiza la capacidad de enviar una mayor cantidad de información al momento a diferentes lugares del planeta.

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