Answer: Option - 2) Light
In fiber optic cable, the signal source is light wave.
Explanation: In fiber optic cable the data transmission send information through electronic signal into light wave. When the input data is given in the form of electronic signal, then it gets converted into light signal with the help of light source. As fiber optic is a medium for carrying information in the form of light from one medium to another. Fiber optics are beneficial as it is used in long distance data transmission.
Write a c++ program that accepts a string from the user and then replaces all occurrences of the letter e with the letter x
Answer:
#include <iostream>
using namespace std;
int main()
{
string str;
cout<<"Enter the string: ";
cin>>str;
for(int i=0;str[i]!='\0';i++){
if(str[i]=='e'){
str[i]='x';
}
}
cout<<"the string is: "<<str<<endl;
return 0;
}
Explanation:
First, include the library iostream for using the input/output instructions.
Create the main function and declare the variables.
Then, use the cout instruction and print the message on the screen.
cin store the string enter by the user into a variable.
After that, take a for loop and if-else statement for checking the condition if the string contains the 'e', then change that alphabet to 'x'.
This process continues until the string not empty.
Finally, print the updated string.
Which type of partitioning is performed onRelation-X?
a. Horizontal Partitioning
b. Vertical Partitioning
c. Replication
d. Noneof above
Answer: B) Vertical Partitioning
Explanation:
As, vertical partitioning is performed on Relation X, it is used for dividing the relation X vertically in columns and it involves creation of tables and columns. They also use some additional tables to store left out columns. We cannot partition the column without perform any modification of value of the column. It only relies on keeping the particular attributes of relation X.
The ArrayList class ____ method returns the current ArrayList size.
a.
length
b.
size
c.
rows
d.
capacity
Answer:
b. size
Explanation:
We can use the size() method of java.util.ArrayList to determine the size of an ArrayList in Java. The size() method of the ArrayList class returns an integer which is equal to the number of elements present in the ArrayList.
Below is an example code to illustrate the use of the size() method of the ArrayList:-
ArrayList<Integer> aList = new ArrayList<Integer>(5);
aList.add(25);
aList.add(2);
aList.add(5);
aList.add(22);
System.out.println("Size of the array list: " + aList.size());
This will print the size of the array list as 4 since we've added four numbers into the array list.
Which ofthe following is the most correct statement about the interestsection of the indirect plan for persuasion?
a- Downplay any negative points.
b- Be positiveand brief.
c- Makeaction easy.
d- Showbenefits to receiver.
Answer: d)- Show benefits to receiver
Explanation: Indirect plan is the approaching a person in a indirect manner and just giving the hint about the main idea rather than presenting the main idea. For creating interest section the idea of attracting the receiver by showing the benefits of the plan is the major option. Because just by sharing the benefit and hint of plan,receiver tends to be attracted towards the plan .
Under what circumstances would a user bebetter off using a time-sharing system rather than a PC or asingle-user workstation?
Answer:
Time and Money
Explanation:
Great question, it is always good to ask away and get rid of any doubts that you may be having.
A time-shared system has its benefits compared to a PC or single-user workstation. Firstly, if more than one person is working on the same project it can save time instead of finishing a part on a single-user workstation and having to move, upload and download constant information.
Secondly, and most importantly is probably the amount of money or investment needed for for more than one workstation. Having a time-shared system saves a huge amount of money for a company especially if the company is tight on a budget.
I hope this answered your question. If you have any more questions feel free to ask away at Brainly.
The INC and Dec instruction do not effect the__________ flag
Answer:
Carry flag
Explanation:
INC instruction
This Instruction is used to increment the destination operand(register or a memory location) by 1,while maintaining the state of the carry flag CF.
DEC instruction
This instruction is used to decrement the destination operand(register or a memory location) by 1,while maintaining the state of the carry flag CF.
Initially we use Inc and Dec instructions for the loop,many loops include multi precision arithmetic doing.For controlling the loops we use inc and dec instructions by setting the zero flag,but not effecting the carry flag.For multi precision arithmetic operations we use the carry state because it helps in a way that it reduces the complexity of code( without writing tons of code),so it is necessary to preserve carry flag.
Why must you be careful when handling a hard drive?
Enterprise Resource Planning (ERP) is an example of a single user database.
A.
True
B.
False
Answer:
false
Explanation:
Which of the following documents should beprepared before the commencement of a softwareproject?
o Quality plan
o Design specification
o Validation (Test) Plan
o Software requirement specification
Answer:
Software requirement specification
Explanation:
requirement specification is the first step before proceeding with any project.
we should validate our output at all phases with software requirement specification
what are the different type of topologies..?
Answer: There are different types of topologies are: 1) Bus topology, 2)Star topology, 3)Ring topology
Explanation: The physical layout in which the network connection are made is known as topology.
Types of topologies are explained as:
1) Bus topology-
It is a type of network where every device is connected to a single cable, which runs one end to another. In this data is transmitted in one direction only and it is also known as linear bus topology.It is cost effective because they can be run in a single cable.2) Star topology-
In star topology every node in the network is connected to one central node. The central node or hub also acts as a repeater and it can manage the entire network from one location.3) Ring topology-
In this topology computers are connected to each other in circular format and every device in a network will have two neighbors. In this the risk of collision is very low and low cost to install.T F Functions should be given names that reflect their purpose.
Answer:
true
Explanation:
FUNCTION: functions are the collection of statements which are used in C programming any program that can not be run without a function, anyone can divide their code in different functions. A function declare the compiler about the name of the function , a function definition provides the actual body of the function so from above discussion it is clear that the function should be given names that reflects their purpose
Give CFG for the following languages,
a. anbm where m = n-1 and n = 1,2,3…
Some words belonging to this language are, a , aab , aaabb , aaaabbb , ….
b. anb2n where n = 1,2,3…
Some words belonging to this language are, abb , aabbbb , aaabbbbbb , ….
Answer:
a.
CFG for {[tex]a^{n}[/tex][tex]b^{m}[/tex], m=n-1 and n=1,2,3… …}
Here we can have a string containing only a single a and no b.
For that the production rule is S → aT, T → ε
Now to get the strings with at least one b, the production rule is to be
T → ATB/ ε
A → a
B → b
Now merging two set of production rules:
S → aT
T → ATB/ε [As T → ε is in both set, so one occurrence is taken]
A → a
B → b
Now let us generate “aaabb”
S → aT → a ATB → aAATBB → aaATBB → aaaTBB → aaaεBB → aaaεbB →aaaεbb → aaabb
b.
CFG for {[tex]a^{n}[/tex][tex]b^{2n}[/tex], n=1,2,3… …}
Here for every single a, we have to generate two b’s.
So the production rule is to be:
S → aSbb/ε
Each time S will generate two b’s for one a.
Define an I/O port. Which functions are performed by it?
Answer:
I/O port is an input output port of a computer which is capable of receiving (input) and sending (output) data. The main function of a I/O port is to send and receive data. As it is used to transfer data. Device such as keyboards is an input device and printer is an output device.
For example - Modem is an input output port and device where we can connect it with the computer is called I/O port.
what is the command to disable any Processes in linix??
Answer: killall[process_name] or kill[PID]
Explanation:
Killall is a tool for disabling running processes on the system. It will disable all programs that matches the name mentioned.
kill disables processes based on process id numbers. it does not disable the process directly. The process recieves a signal where the process will follow instructions which it has to follow if it receives the signal.
In 1736, Euler represented the Knigsberg bridge problem as a graph, marking (as recorded) the birth of graph theory.
True
False
Answer:
True
Explanation:
It is was in 1736 that Euler gave the answer to the knigsberg bridge problem. This problem revolves around the use of 7 bridges and covering all the 7 bridges at once and then again moving to the start. So in 1736 Euler used graphs to solve the problem which answered in negative. This also lead to the birth of graph theory which carried out be used in many applications.
Final answer:
It is true that Euler represented the Königsberg bridge problem as a graph in 1736, which is considered the birth of graph theory, a key field in mathematics.
Explanation:
The statement is true. In 1736, Leonhard Euler indeed tackled the problem of the Seven Bridges of Königsberg and laid the foundations for graph theory. Euler's approach consisted of representing the landmasses and bridges of Königsberg as a graph, where the landmasses were nodes and the bridges were edges connecting these nodes.
Euler's work showed that the problem of finding a path that crossed every bridge exactly once had no solution and this analytical approach essentially marked the birth of graph theory, a fundamental field in discrete mathematics, computer science, and other disciplines.
An “evil twin” in the context of computer security is: a) A virus-laden attachment that looks just like a sincere attachment b) A counterfeit Wifi connection in a coffee shop that appears to be genuine c) A duplicate badge that allows a nasty person entry into a data center d) Someone who looks just like the Chief Information Officer, but steals data
Answer:
A
Explanation:
An “evil twin” in the context of computer security is a virus-laden attachment that looks just like a sincere attachment. Hence option a is correct.
What is computer security?Computer security is defined as the defense of computer systems and data against damage, theft, and improper use. The same techniques used to safeguard other valuable or sensitive equipment, such as serial numbers, doors and locks, and alarms, are often employed to protect computer hardware.
A rogue Wi-Fi access point (AP) that poses as a genuine one and provides access to sensitive data without the end user's knowledge is known as a "evil twin assault." With a smartphone or other internet-capable gadget, some readily available software, and an attacker, it is simple to construct an evil twin.
Thus, an “evil twin” in the context of computer security is a virus-laden attachment that looks just like a sincere attachment. Hence option a is correct.
To learn more about computer security, refer to the link below:
https://brainly.com/question/5042768
#SPJ5
what are the differences betweenCONS, LIST, and APPEND?
Answer:
These all are constructors.
CONS
(CONS A B)
makes a pair like this: (A . B)
In other words, A is the CAR of the pair; B is the CDR of the pair.
For example:
(CONS 4 5) ==> (4 . 5)
(CONS 4 '(5 6)) ==> (4 5 6)
[The pair (4 . (5 6)) is the same thing as (4 5 6)].
APPEND
(APPEND A B)
makes a new list by replacing the final nil in A with the list B. A and
B must be proper lists.
For example:
(APPEND '(4) '(5 6)) ==> (4 5 6)
This takes any amount of number and put in this order
LIST
In this ,it will return a list whose elements are value of arguments in the order as it appeared in the LIST.It can take any amount of parameters
For example,
(LIST 4) ==> (4)
(LIST 4 5) ==> (4 5)
(LIST 4 5 '(6 7)) ==> (4 5 (6 7))
(LIST (+ 5 6)(* 5 6)) ==> (8 9)
Given the following code fragment, how many times does the loop body execute? int laps = 50; int myNum = 1; do { myNum = myNum + 2; laps = laps + 1; } while(laps <= 1);
Answer:
one
Explanation:
The loop is used to execute the part of code or statement again and again until the condition is not FALSE.
There are three types of loop in programming.
1. for loop
2.while loop
3. do-while loop
Do-while has one special property which makes it different from other loops.
The loop statement executes once if the condition of the loop is failed in the starting.
In do-while, the statement executes first and then while checking the condition.
let discuss the code:
initially, laps=50, myNum=1
then, the program executes the statement in the loop.
so, myNum = 1 + 2=3.
A value 3 is assign to the variable myNum.
laps = 50 + 1=51.
A value 3 is assigned to the laps variable.
then while checking the condition (51 <= 1) which is FALSE.
The program terminates the loop.
Therefore, the answer is one.
The goal of quality assurance is toprovide management with the data needed to determine whichsoftware engineers are producingthe most defects.
i. True
ii. False
Given positive integer numInsects, write a while loop that prints that number doubled without reaching 100. Follow each number with a space. After the loop, print a newline. Ex: If numInsects = 8, print:
8 16 32 64
import java.util.Scanner;
public class InsectGrowth {
public static void main (String [] args) {
int numInsects = 0;
The question is about writing a Java while loop to double a number without exceeding 100, relevant to Computers and Technology in a high school context. The loop prints each doubled value followed by a space and stops before the number reaches 100, after which it prints a new line.
The subject of the question is related to Computers and Technology, particularly focusing on programming and the use of while loops in Java. A while loop is used to repeatedly execute a block of code as long as a specified condition is true. In the context of the student's question, the goal is to use a while loop to double a positive integer without exceeding a certain threshold (in this case, 100).
To solve the problem, we need to set up a while loop that continues to operate as long as the doubled value of numInsects is less than 100. Here is the code snippet that accomplishes this:
while (numInsects < 100) {This loop starts by checking if the current value of numInsects is less than 100. If it is, the value is printed followed by a space, and then numInsects is doubled. The process repeats until the condition is no longer true (i.e., numInsects is 100 or more), at which point a newline is printed to conclude the output.
A graph of an organization'snet income over the past 10 years is an example of an analogmodel.
True
False
Answer:
True
Explanation:
Analog model
It is a representation of target model,it include charts,models of electric and mechanical system and graphs also.The size of this model is not fixed it may vary according to the requirements,so it may be small or big.
As per question,the graph is representing net income of an organization, it also representing a model(target) for the company that's why we can call it an Analog model.
What is queue operations in datastructures?
Answer:
Queue- It is a data structure,unlike stacks we can insert and delete elements from both sides.
It works on the principle FiFo(first in first out) i.e the element which is inserted at the starting will be the one for deleting.
We can perform many operations on queue like enqueue(),dequeue() and many more.
Queue Operations
enqueue()-This operation is used to add elements in Queue,we add element to rear.
Example-
Queue.prototype.enqueue = insertval(5)
{
this.array.push(5); //inserting elements to a queue
}
dequeue()-This operation is used to remove elements from Queue,while removing data from front.
Example-
Queue. prototype. dequeue = removalval(5)
{
this.array.pop(5); //removing elements from a queue
}
peek()-This operation is used to get the element from front i.e first element.
Example-
int peek()
{
return queue[front];
}
isfull()-This operation is used to check whether the queue is full or not.
Example-
bool isfull()
{
if(rear == MAXSIZE - 1) //checking queue is full
return true;
else
return false;
}
isempty()-This operation is used to check whether the queue is empty or not.
Example
bool isempty()
{
if(front < 0 || front > rear) //checking queue is empty or not
return true;
else
return false;
}
In a sell or process further decision, which of the following costs is relevant?
I. A variable production cost incurred after split-off.
II. A fixed production cost incurred prior to split-off.
Neither I nor II
Only II
Only I
Both I and II
Answer:
The correct option is C) a variable production cost incurred after split off.
Explanation:
First of all it is important to understand what sell or process further decision is , this is a situation where a company has to decide whether they should sell their product right now or they should make some further changes in to it , which can help them earn more revenue.
Company's make such decisions by doing an incremental analysis where they see whether the additional revenues they think product will generate when it would be further processed will be more than the additional cost they would have to incurred in further processing the product.
So at this point only variable production cost which they would have to incurred would matter not the fixed cost because of the incremental revenue and cost are the only significant factors here for decision making.
OSI model is more popular thanTCP/IP. True/false
Answer:
False
Explanation:
Hi, the OSI model is not that it is more popular than TCP/IP, but the OSI model was originally created as an academic contribution where it helped to build TCP/IP where a more simplified and tailored way was found of being able to implement the Internet. In summary, the OSI model served as an inspiration to execute a more versatile model such as TCP/IP in its implementation.
I hope it's help you.
Which of the following syntax of the functions in SQL is used toadd column values? COUNT(*)
COUNT(expression)
SUM(expression)
MAX(expression)
Answer:
SUM(expression)
Explanation:
The SUM function is used to calculate the SUM of entries in a numeric column.
The syntax is as follows:
SELECT SUM(<column_name>)
FROM <table_name >
[WHERE <condition>];
For example:
Select SUM(age)
FROM employees;
COUNT is used to find the number of rows in the resultset.
MAX returns the maximum valued entry in the selected column.
The syntax of the functions in SQL that is used to add column values is: B. SUM(expression).
What is SQL?SQL is an acronym for structured query language and it can be defined as a domain-specific programming language that is designed and developed for the management of various data that are saved in a relational or structured database.
This ultimately implies that, a structured query language (SQL) function can be used to communicate with a database in accordance with the American National Standards Institute (ANSI) standards such as:
COUNT(expression)SUM(expression)MAX(expression)Generally, the SUM(expression) is a structured query language (SQL) function that is used to add column values.
Read more on SQL here: https://brainly.com/question/25266787
Write multiple if statements. If car_year is 1969 or earlier, print "Few safety features." If 1970 or later, print "Probably has seat belts." If 1990 or later, print "Probably has antilock brakes." If 2000 or later, print "Probably has airbags." End each phrase with a period and a newline.
The task involves writing multiple if statements to classify car safety features based on the car's year. The conditions must be evaluated in ascending order to print out the correct safety features associated with each time period.
When writing multiple if statements in a programming context to classify the safety features of a car based on its year, you would structure your code similar to this:
if car_year \<= 1969:
print("Few safety features.\n")
elif car_year \< 1990:
print("Probably has seat belts.\n")
elif car_year \< 2000:
print("Probably has antilock brakes.\n")
else:
print("Probably has airbags.\n")
This series of if statements evaluates the variable car_year and prints a message related to the safety features that the car is likely to have, depending on its manufacture year. It's important to place the conditions in ascending order by year, so the correct message is printed as soon as its condition is met.
Write pseudocode instruction to carry out each of thefollowing computational operations.
A. Determine the area of a triangle given value the base b andthe height h.
B. Compute the interest earned in 1 year given the startingaccount balance B and annual interest rate I and assuming simpleinterest, that s, no compunding. Also determine the final balanceat the end of the year.
C. Determine the flying time between two cities given themileage M between them and average speed of the airplane.
Explanation:
A. Pseudocode to determine the area of a triangle given value the base b andthe height h:-
START
INPUT b
INPUT h
COMPUTE Area = 0.5*b*h
DISPLAY Area
STOP
B. Pseudocode to compute the simple interest earned in 1 year given the starting account balance B and annual interest rate I :-
START
INPUT B
INPUT I
COMPUTE Interest = (B*I*1)/100
DISPLAY Interest
STOP
C. Pseudocode to determine the flying time between two cities given the mileage M between them and average speed of the airplane :-
START
INPUT M
INPUT S
COMPUTE Time = M/S
DISPLAY Time
STOP
TRUE/FALSE
10. The Intel 8259 Programmable Interrupt Controller (PIC) schedules the handling of interrupts according to their priority levels.
Answer:
TRUE
Explanation:
The Intel 8259 is a device designed for 8085 and 8086 intel microprocessor.
The Intel 8259 Interrupt Controller (PIC) accept the requests from the I/O devices and check whether the requests is of the higher priority than the ongoing request serviced by CPU. Interrupt is issued to the CPU based on priorities,if the request is of higher priority than ongoing service then Interrupt will be issued the ongoing service will pause and the new request will be processed. If new request has less priority then no interrupt will be issued, New request will wait for CPU to free.
The bandwidth of the medium is measured as ____.
bits per second (bps)
amps per second (bps)
characters per second (cps)
words per second (bps)
Answer:
bits per second (bps)
Explanation:
The definition of the bandwidth is capacity of the medium to transfer maximum amount of data transfer from one point to the another point in a specific time usually one second.
It generally measured as bits per second (bps).
For advance or high capacity medium is measure as gigabits per second (Gbps).
For java
Write a for loop to print all elements in courseGrades, following each element with a space (including the last). Print forwards, then backwards. End each loop with a newline. Ex: If courseGrades = {7, 9, 11, 10}, print:
7 9 11 10 10 11 9 7
Hint: Use two for loops. Second loop starts with i = NUM_VALS - 1.
Answer:
public class array{
public static void main(String []args){
int[] array = {2,4,7,1,9};
int num_vals = array.length;
for(int i=0;i<num_vals;i++){
System.out.println(array[i] + " ");
}
for(int i=num_vals-1;i>=0;i--){
System.out.println(array[i] + " ");
}
}
}
Explanation:
First create the class in the java programming.
Then create the main function and declare the array with values.
Store the size of array in num_vals variable by using the function array.length.
create a for loop to iterate the each element in the array and then print on the screen with spaces and newline.
it traverse the loop from first to last.
Then, again create the for loop to iterate the each element in the array and then print on the screen with spaces and newline but the traversing start from last to first.