A data entry application control that would detect and prevent entry of alphabetic characters as the price of an inventory item is a validation rule. Validation rules are used to ensure that data is entered into a form or database correctly.
Which data entry application control would detect and prevent entry of alphabetic characters as the price of an inventory item?Validation rules are a key data entry application control that can be used to ensure the accuracy of the data being entered. By requiring the entry of only numeric characters for the price field, we can be sure that the correct type of data is being entered. This prevents the entry of any alphabetic characters, which could lead to incorrect or invalid data. Validation rules can also be used to ensure that the data entered is within a certain range (e.g. prices can only be within a certain range). This further helps to ensure that the data entered is valid and accurate.
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windows switches to secure desktop mode when the uac prompt appears. what is the objective of secure desktop mode?
Windows 8's Desktop Mode is a graphical user interface (GUI) environment for quickly gaining access to frequently used programs and services.
What is Desktop mode?In all Windows versions prior to Windows 8, Desktop Mode functions and looks much like a standard desktop, but with a few minor differences.
One of Windows 8's two available GUI interfaces is Desktop Mode. The tiled screen menu is the alternative. Windows 8 typically launches in the tiled screen user interface (UI), but a user can choose to launch it in desktop mode, which closely mimics the desktop present in earlier
Windows versions. re-use of. re-use re- re- – –. in to –. Additionally, the majority of the features in desktop mode may be accessible using non-touch input devices, like a mouse and keyboard, in contrast to the new Windows 8 app menu.
Therefore, Windows 8's Desktop Mode is a graphical user interface (GUI) environment for quickly gaining access to frequently used programs and services.
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there is no related service information or tsbs open for this symptom. the concern is still present. what is the next step?
The next step if the concern of no related service information or tsbs open for this symptom is still present is to Isolate what fuse and circuit powers the rear defrost using an electrical schematic
A fuse is a device that protects an electrical system against overcurrent. It has a tiny wire or metal that melts due to high current and opens the circuit, preventing erroneous currents from flowing. Different depiction schemes are provided by the IEC, IEEE, and ANSI. The schematic is a diagram that depicts the logical relationships that exist. A schematic is a graphic that specifies the logical connections between components on a circuit board, whether fixed or flexible. It essentially illustrates how the elements are electronically interconnected. A netlist, which is a basic data structure that lists every connection in the design, is included in a schematic.
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if you share highly sensitive material in adobe xd, what type of access permission should you select?
Private prototypes can have permissions set up to allow only invited persons access.Enter email addresses to invite users in Adobe XD.
How can I grant Adobe XD permission? To share your work with others after designing your prototypes, click the Share icon and then choose Share for Review.Private prototypes can have permissions set up to allow only invited persons access.Enter email addresses to invite users in Adobe XD.XD.The project name and version should be included in a file name.No.The date, the author, and the version number must all appear in a file's name.Within Adobe XD, the Share mode panel allows for the management of links.When sharing Adobe XD prototypes, select whether to create a brand-new link or modify an existing one.Without the requirement to share a new XD prototype link, updating a share link will distribute modifications to anyone with access to that link.
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a name defined in an outer scope is not available in all blocks nested inside that scope. true false
True. A name defined in an outer scope is not available in all blocks nested inside that scope.
How a name defined in an outer scope is not available in all blocks nested inside that scope? A name has local scope or block scope if it is declared in a block. A name with local scope can be used in that block and in blocks enclosed within that block, but the name must be declared before it is used. When the block is exited, the names declared in the block are no longer available.Parameter names for a function have the scope of the outermost block of that function. Also, if the function is declared and not defined, these parameter names have function prototype scope.When one block is nested inside another, the variables from the outer block are usually visible in the nested block. However, if the declaration of a variable in a nested block has the same name as a variable that is declared in an enclosing block, the declaration in the nested block hides the variable that was declared in the enclosing block. The original declaration is restored when program control returns to the outer block. This is called block visibility.To learn more about Nested blocks refer to:
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A name defined in an outer scope is available in all nested blocks within that scope.
What is scope of variable?In layman's terms, a variable's scope is its lifetime in the program. This means that the scope of a variable is the entire program's block of code where the variable is declared, used, and can be modified. The following section will teach you about variable local scope.A scope is a program region, and there are generally three places where variables can be declared: Local variables are defined within a function or a block, while formal parameters are defined in the definition of function parameters. Global variables are variables that exist outside of all functions.The context in which a name appears is referred to as its scope.To learn more about scope refer to :
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in Scratch, when programming a laser to move upward, what can you play around with to make the laser move faster or slower? A. the y-values B. the z-values C. the values in the enemy broadcast D. the forever block values
Answer:
Explanation:
To make it go faster, you could double it, to make it move 20 steps, or if that's too fast, change it to move 15 steps. For the repetition block, repeating 25 times is for 10 steps. For example, if you want it to go the same distance, just faster, you could make it 20 steps, which would be repeat 12.5 times, which is divide by 2.
What is a step in scratch?
A step is equal to a one-pixel length. The Default Valueis 10 and can be replaced by any number. The block actually uses Trigonometryto move in the proper direction, as this is how a computer handles it. The block was known as "forward ()" in Scratch 0.1before being renamed to "move () steps" in Scratch 0.3. Example Uses
Why learn how to code in scratch?
Learning how to code in Scratch is the perfect introduction to computer science, and will make learning other programming languages much more intuitive. This is the perfect article to start your journey into computer science, as movement is one of the easiest things to code in Scratch! What is Movement?
pille runs a small business. she wants to create and send invoices to her customers. which productivity software should pille use?
Since Pille runs a small business. she wants to create and send invoices to her customers. The type of productivity software that Pille use is option D: openOffice Calc.
What does this productivity program do?Applications are known to be used to create information are referred to as productivity software (sometimes known as personal productivity software or office productivity software) (such as that of documents, presentations, worksheets, databases, charts, graphs, digital paintings, electronic music and digital video).
Therefore, in regards to the above question, Spreadsheets are said to be included in the OpenOffice software suite as part of OpenOffice Calc. With roughly identical capabilities, Calc is comparable to Microsoft Excel. Spreadsheets in the Microsoft Excel file format can be opened and saved with the use of Calc and thus will Help Pille.
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g write a recursive program based on your definition that repeatedly prompts the user for a string and then reports whether the string is a palindrome. d. write an iterative program that does the same thing.
A recursive call of the function is what is referred to in programming languages when a programme enables you to call a function inside another function.
What is recursion with example?Recursion is the act of repeating things in a way that is self-similar. A recursive call of the function is what is referred to in programming languages when a programme enables you to call a function inside another function.
Recursion, or a function that calls itself, is supported in the C programming language. The function will enter an infinite loop if recursion is used, so programmers must be careful to define an exit condition from the function.
#include <bits/stdc++.h>
using namespace std;
bool isPalRec(char str[],
int s, int e)
{
if (s == e)
return true;
if (str[s] != str[e])
return false;
if (s < e + 1)
return isPalRec(str, s + 1, e - 1);
return true;
}
bool isPalindrome(char str[])
{
int n = strlen(str);
if (n == 0)
return true;
return isPalRec(str, 0, n - 1);
}
int main()
{
char str[] = "geeg";
if (isPalindrome(str))
cout << "Yes";
else
cout << "No";
return 0;
}
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show that if ham-cycle is in p, then the problem of listing the vertices of a hamiltonian cycle, in order, is polynomial-time solvable.
The brute force algorithm would check all possible permutations of the graph G. If G is presented as an adjacency matrix with size n, the number of vertices (m) in the graph is Ω(√n). There are m! possible permutations of the vertices, so the running time is Ω((√n)!) and is therefore super polynomial.
What is meant by Hamiltonian cycle ?A complete loop around a graph known as a Hamiltonian cycle, also known as a Hamiltonian circuit, Hamilton cycle, or Hamilton circuit, visits each node precisely once (Skiena 1990, p. 196). A graph is referred to as Hamiltonian if it has a Hamiltonian cycle.
There is a Hamiltonian cycle in a dodecahedron, a regular solid with twelve identical pentagonal faces. On a graph, a closed loop known as a Hamiltonian cycle is one that visits each node (vertex) precisely once.
A Hamiltonian path (also known as a traceable path) is a path in an undirected or directed graph that visits each vertex exactly once, according to the mathematical discipline of graph theory. A cycle called a Hamiltonian cycle (or Hamiltonian circuit) makes one exact trip to each vertex.
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write a program that asks the user for an integer and then prints out all its factors. for example, when the user enters 150, the program should print
Program in C++ that calculates the prime factors of a number. Output image attached.
C++ code#include<iostream>
#include<cmath>
using namespace std;
void factors(int n);
void factors(int n) {
// define variablesint prime_factors;
bool yes_or_no;
cout << n << " = ";
prime_factors = 2;
yes_or_no = true;
do {
//Factor calculatorif (n%prime_factors==0) {
if (yes_or_no) {
cout << prime_factors;
yes_or_no = false;
} else {
cout << "x" << prime_factors;
}
n = int(n/prime_factors);
} else {
prime_factors = prime_factors+1;
}
} while (n>1);
cout << "" << endl;
}
int main() {
//define variablesfloat n;
// Entry numberscout << "Entry number: ";
cin >> n;
if (n<=1) {
cout << "Entry a value greater than 1" << endl;
} else {
// Function callfactors(n);
}
return 0;
}
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1.consider the following list: 5, 12, 25, 32, 38, 46, 58, 62, 85, 90, 97, 105, 110 using the binary search as described in this chapter, how many comparisons are required to find whether the following items are in the list? show the values of first, last, and middle and the number of comparisons after each iteration of the loop.
a. 32
b. 20
32 comparisons are required to find whether the following items are in the list.
What is comparisons?When comparing two values, comparison operators are used (or variables). This is useful in programming because it aids us in finding answers and making decisions.
A comparison's return value is either 1 or 0, indicating whether it is true (1) or false (2). (0). These are known as Boolean values, and you can learn more about them in the Booleans and If.. sections. Other chapters.
Comparison operators are used in conditional expressions in computer programming to determine which block of code executes, thereby controlling the program flow. In an expression that resolves to a true or false value, comparison operators compare two values.
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Design an algorithm, as efficient as possible, that outputs all the squares that can reach the bottom right square (again, assume that one can only go froma square to an adjacent square with a lower altitude). In particular, the algorithm should output a list of squares that if you start there, it is possible to reach the bottom right square.-Please provide runtime of algorithm-you must specify the graph that you con-struct from a non-graph input (i.e., which are the vertices, edge? Weighted or unweighted? Directed or undirected? If directed, you must specify the edges’ directions).
However, Bellman-temporal Ford's complexity is O(VE), which is higher than Dijkstra's. where there are many vertices (V) and many edges (E).
V = n, E = O for a whole network with n vertices (n2). Thus, the entire time complexity is O. (n3). If the edges in your graph have weights, it is considered to be a weighted graph; otherwise, it is said to be an unweighted graph. Each edge has a weight, which is a numerical value. Dijkstra's technique doesn't work for unweighted graphs, as I discovered from the comments. I take it that by "unweighted graphs" you mean those with a fixed weight per edge, like 1. Otherwise, it's ambiguous what the term "shortest path" might signify.
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What is one way to ensure your design has enough white space?
The one way to ensure your design has enough white space is to delete or remove all elements that are seen or found around the object.
What does a design's white space mean?The space between design elements is known as white space. Additionally, it refers to the area between typographic glyphs and the space between specific design elements (readable characters). White space does not necessarily have to be white, despite its name. Any color, texture, pattern, or even a backdrop picture could be used.
Therefore, in regards to the task above, to accomplish it, use a straightforward trick: get rid of everything around the object. Existing pieces in a space stand out more because there aren't as many of them there. Due to the lack of other things to observe in that location, the user's focus is drawn to the area where an object is present.
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ilya has been asked to recommend a federation system technology that is an open source federation framework that can support the development of authorization protocols. which of these technologies would he recommend?
OAuth. OAuth, which stands for Open Authorization, allows third-party services to exchange information about you without requiring you to provide your password.
What is OAuth?Applications can have "safe designated access" thanks to the open-standard authorization protocol or framework known as OAuth. Delegated permission for REST/APIs is handled via the OAuth framework. Without disclosing the user's password, it enables apps to access a user's data in a limited capacity. It distinguishes between authentication and authorization and supports a range of use cases that take into account different device capabilities. The development of OAuth was a response to the direct authentication technique. This pattern became commonplace with HTTP Basic Authentication, which asks the user for a username and password. An end user interacts with their identity provider in this scenario, who creates a cryptographically signed token and sends it to the application to authenticate the user. The identity provider has the application's trust.To learn more about OAuth refer to:
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What color is typically used for coins in games? A. blue B. green C. orange D. yellow
Answer:
All i could find is Blue and green
I will be thankful I’d you help
The information used to explain the graph is known as chart title. Hence option B is correct.
What are statistical graphs?Statistical graphs are defined as a graphic representation of applied mathematical knowledge. To make it simpler to understand and interpret statistical data, a set of data is represented by statistical graphs.
A table chart is just another type of information presentation. In boxes or columns of the table, there are words, numbers, or a mix of the two. It depicts a group of facts and how they relate to one another.
Thus, the information used to explain the graph is known as statistical graphs.
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which of the following attacks is a form of software exploitation that transmits or submits a longer stream of data than the input variable is designed to handle?
Buffer overflow attack
Buffer overflow attack is a form of software exploitation that transmits or submits a longer stream of data than the input variable is designed to handle.
What is Buffer overflow attack?
Buffer overflow is probably the most well-known type of software security flaw. Although most software developers are aware of the buffer overflow vulnerability, buffer overflow attacks on both legacy and newly developed applications are still common. Part of the problem stems from the numerous ways buffer overflows can occur, and another part stems from the error-prone techniques commonly used to prevent them.
Buffer overflows are difficult to find, and even when they are, they are generally difficult to exploit. Nonetheless, attackers have discovered buffer overflows in a dizzying array of products and components.
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listen to exam instructions amber, a network administrator, is conducting voip training for other it team members. melanie, a new team member, is confused about the difference between latency and jitter. what is the best way to explain the difference?
The best way to explain the difference is ''Jitter is the up and down variation in latency''.
Explain the difference between latency and jitter ?The main difference between jitter and latency is that jitter is defined as a shift in the amount of latency, whereas latency is defined as a delay caused by the network. It's crucial to frequently check jitter and delay since they have a detrimental effect on network performance.Jitter should ideally be less than 30ms. Network latency shouldn't exceed 150 ms one-way, and packet loss shouldn't be more than 1%.In a nutshell, jitter is an unintentional increase in latency or ping rate. When the rate fluctuates, it shakes the signal and increases the ping rate or latency on the way to and from the server, slowing down signal transmission and possibly leading to data loss. This is known as jitter.Learn more about latency and jitter refer to :
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refer to the exhibit. a user pc has successfully transmitted packets to www.cisco. which ip address does the user pc target in order to forward its data off the local network?
The data of the local network is 172.20.0.254.
What is local network?A local area network is a type of computer network that connects computers in an area that is relatively small, like a home, school, lab, university campus, or office building. A wide area network, on the other hand, typically uses leased telecommunications circuits and spans a greater geographic area. Simply go to the network settings on your computer, laptop, or Mac and select the option to set up a new connection or network. Plugging in an Ethernet cable with one end in the computer and the other in your router or network switch makes adding more computers to your LAN a straightforward process. A local area network (LAN) is a group of interconnected devices that are physically located in a building, office, or house.To learn more about local network refer to:
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the 4gl languages that enable nonprogrammers to use certain easily understood commands to search and generate reports from a database are called
The 4gl languages that enable non-programmers to use certain easily understood commands to search and generate reports from a database are called query.
What is 4gl?A computer programming language that is part of a class that is intended to improve upon third-generation programming languages (3GL) is known as a fourth-generation programming language (or 4GL).
Every generation of programming language strives to provide a greater level of abstraction of the internal workings of the computer hardware, making the language more user-friendly, potent, and adaptable.
Despite the fact that the definition of 4GL has evolved over time, it can still be characterized by the fact that it works more with large groups of data at once rather than concentrating on just bits and bytes.
The support for report generation, database management, mathematical optimization, GUI development, and web development may be found in languages that advertise themselves as 4GL. According to some academics, domain-specific languages include 4GLs as a subset.
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write a program with a concurrent pipeline architecture that has three steps: 1) threads that produce 1000 random integers
A program with a concurrent pipeline architecture that has three steps:
1) threads that produce 1000 random integers is given below.
What is a program?A computer program is a series of instructions written in a programming language that can be carried out by a computer. Software is made up of both tangible and intangible components, including computer programs as one example.
Source code is the name given to a computer program that can be read by humans. Because computers can only run their native machine instructions, source code requires the assistance of another computer program to run.
As a result, the compiler of the language can convert source code into machine instructions. (An assembler is used to translate machine language programs.) An executable is the name given to the finished file. As an alternative, source code could run through the language's interpreter.
Code to produce 1000 random integers
#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#include <pthread.h>
//declare an array to store 1000 random integers
int a[1000];
//declare an array sum to store sums of each thread
int sum[4];
//To keep track of nth thread
int part = 0;
//function to calculate 25 array elemnts
void* sum_array(void* arg)
{
// Each thread computes sum of 1/4th of array
int thread_part = part++;
for (int i = thread_part * 25;
i < (thread_part + 1) *25; i++)
sum[thread_part] += a[i];
}
int main()
{ int i; //seeding srand(time(0));
//initialize array with 100 elements ranging in (1,1000)
for(i = 0; i < 1000; i++)
{
a[i] = rand()%1000 + 1;
}
//create threads array of size 4
pthread_t threads[4];
// Creating 4 threads
for (int i = 0; i < 4; i++)
pthread_create(&threads[i], NULL, sum_array, (void*)NULL);
// joining 4 threads i.e. waiting for all 4 threads to complete
for (int i = 0; i < 4; i++)
pthread_join(threads[i], NULL);
// adding sum of all 4 parts
int total_sum = 0;
for (int i = 0; i < 4; i++)
total_sum += sum[i];
printf("Sum of array eleements is : %d", total_sum); return 0;
}
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after lightning caused an electrical power surge and damaged his computer, damon no longer turns his computer on during thunderstorms. this change in damon's behavior is the result of:
This change in Damon's behavior is the result of positive reinforcement. Positive reinforcement occurs because of the awareness about the hazardous things that you don't want it to reoccur in your life.
Positive reinforcement can be described as behavior that leads you to positive things. Positive reinforcement means the introduction of a desired or pleasurable stimulus after a behavior. The desired stimulus reinforces the behavior, making it more likely that the behavior will occur again. Positive reinforcement happens because you've experienced things that made you sad and you don't want that to happen in your life again. Positive reinforcement can also be said as a way to prevent bad things from happening.
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jamal has taken an image that he really likes, but it doesn't conform to the rule of thirds. which editing technique could improve this image?
The rule of thirds is the most well-known and widely ignored compositional "rule" in photography. It divides the frame into thirds, horizontally and vertically, and claims that placing the subject near one of the resulting intersections is preferable to placing it in the center.
What is the rule of Thirds in photography?
The rule of thirds is notable as more of a guideline because it goes against our natural inclination to make the center of our attention the center of the photograph. In real life, our eyes do not behave this way; when we look at something, we look at it directly. We don't look slightly off-axis to frame the other person to the left or right of center during a conversation.
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The automatic antenna tuner on the ft-dx10 is designed to ensure what ohm antenna impedence is presented?.
At amateur operating frequencies, the FTDX10 is designed for 50 Ohm resistive impedance. Choose the appropriate antenna (dipole antenna, YAGI antenna, cubical quad antenna, etc.) for the operation and bands.
What is Impedance?
Impedance is the sum of resistance and reactance. It was defined as anything that can obstructs the flow of electrons within the electrical circuit. As a result, it influences current generation in the electrical circuit. It could be found in all the possible circuit components and across all possible electrical circuits. Impedance is represented mathematically by the letter Z and has the unit ohm. It's a mix of resistance and reactance.
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the distinction between application and infrastructure security: application security is designed to resist attacks. infrastructure security is the software configured to resist attacks.
A software engineering challenge is application security, in which the system must be built to withstand attacks. Infrastructure security is a systems management issue, and it involves configuring the infrastructure to fend against threats.
What is software engineering?Software engineering is defined as a field of engineering that deals with the development of software products using established scientific methods, methodologies, and concepts. To address real-world issues, software engineers design and build computer systems and applications.
Infrastructure security is defined as the process of defending vital infrastructure against both physical and digital threats. Infrastructure security, which includes critical infrastructure security, is essential for avoiding attack or disaster-related damage to technology assets and data.
Thus, a software engineering challenge is application security, in which the system must be built to withstand attacks. Infrastructure security is a systems management issue, and it involves configuring the infrastructure to fend against threats.
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on which printer technology is physical print head wear the biggest concern? choose the best response.
The printer technology that is physical print head wear the biggest concern is option A: Impact.
What is the aim of an impact printer?A printed character is created when an impact printer rubs a plastic or metal letter against paper while using an inked ribbon. Impact printing was widely used in early versions of word processing, desktop printing for individuals, and commercial data processing.
Therefore, in the context of the above, An ink ribbon and paper come into touch directly when an impact printer is operating. The ink ribbon is struck by a metal or plastic head, which causes the ribbon to press against the paper and print the desired character (letter, digit, dot, or line) on the page. Thus it fit into the question above.
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See full question below
.
On which printer technology is physical print head wear the biggest concern? Choose the best response.
answer choices
Impact
Inkjet
Laser
Thermal
The variable strFirst's scope is _____.
def usernameMaker (strFirst, strLast):
return strFirst + strLast[0]
def passwordMaker (strA, numC):
return strA + str(numC)
# the main part of your program that calls the function
username = usernameMaker ('Chris', 'Smith')
dogName = 'Sammy'
favoriteNumber = 7
password = passwordMaker (dogName,favoriteNumber)
the entire program
the entire program
the usernameMaker function
the usernameMaker function
the passwordMaker function
the passwordMaker function
the main part of the program that calls the funcion
Based on the code above, The variable strFirst's scope is the passwordMaker
What does "scope of a variable" mean?
The whole body of the function or method in which the variable numC is being used—in this case, the passwordMaker method—is its local scope. This is due to the fact that the procedure uses the variable numC as a parameter variable.
It can be found in the code next to the usernameMaker, as you can see. Its scope is limited because it is only used at that time. It's also true on Edge, just in case.
Therefore, A variable's scope can be defined as its duration in the program. This indicates that a variable's scope is the block of code throughout the entire program where it is declared, utilized, and modifiable.
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suppose that stack is an object of type stacktype and the value of stack.top-1 is 2. how may elements are in the stack?
Stack is an item that has the stack type and stack as its value. top-1 is 2 then the stack would have three components.
Stack: What is it?
A linear data structure called a stack keeps the operations performed in a specific order. The order could be FILO or LIFO (Last In First Out) (First In Last Out). There are several instances of stacks in everyday life. Take the canteen's plate stacking arrangement as an illustration. The plate that is placed at the bottom of the stack stays there for the greatest amount of time since the plate just at top is the first to be taken out. Therefore, it is clear that it adheres to the LIFO/FILO (Last In, First Out) principle.
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each salesperson who travels has a cable lock to lock down their laptop when they step away from the device. which of the following controls does this apply?
Answer:
Preventive
Explanation:
Assume the PC starts at address 0x00000120 and the below instructions execute. The first instruction is located at the given address. LDR R3. [10] MOV R3, #Ox42 AND R6, R5, R4 EOR R3, R5 SBC R1, R2, R5 What will be the value of the PC AFTER the last instruction executes? O 1.0x00000120 2. Ox00000128 3. Ox00000124 4. Ox00000134 5. Ox00000130
Ox00000128 , is the value of the PC AFTER the last instruction executes
What is address and instructions in pc?
The control unit in the CPU uses the address field of an instruction to access memory for the operand. The value entered in the address field can either be the address of the operand or simply a starting point from which to compute the operand's address.
So for the question the first instruction is located at the given address LDR R2.[10] MOV R3 then after R5 SBC R1,R2,R5 then at the last it executes Ox00000128 is the last one which is executed
Hence to conclude the last instruction is Ox00000128 is the last instruction which is done
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For each of the following, construct regular expressions that match the given set of strings:
(a) Binary strings where every occurrence of a 1 is immediately followed by a 0.
(b) Binary strings where no occurrence of a 00 is immediately followed by a 1.
(c) The set of all binary strings that contain at least one 1 and at most two 0’s.
(d) The set of all binary strings that begin with a 1 and have length congruent to 2 mod 4
Below is the solution of the given question in which we are constructing regular expressions that match the given set of strings:
Regular Expression for the given string set:
(a) Binary strings in which every occurrence of the 1 is immediately followed by the 0.
(0 + 10)*
(b) Binary strings where no occurrence of a 00 is immediately followed by the 1
(1 + 01)*(000* + epsilon)
(c) The set of all binary strings with at least one 1 and no more than two 0s.
11* + 011* + 11*01* + 0011* + 11*01*01* + 011*01* + 11*00
(d) The set of all binary strings beginning with a 1 and having a length congruent to 2 mod 4
1(((0+1)(0+1)(0+1)0+1))*(0+1)
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