Which of the following can be used to record the behavior of classes?
A) Javadoc comments
B) Nouns and verbs in the problem description
C) Polymorphism
D) UML notation
Answer:
A) Javadoc comments
Explanation:
It is used for documenting the java source code in HTML and java code documentation. The difference between multi-line comment and javadoc is that ,javadoc uses extra asterisk, For example-
/**
* This is a Javadoc
*/
It is used to record the behavior of classes.There are various tags used in this like @author,{@code},@exception and many more.
prove that the dual of the exclusive-OR gate is also itscomplement
Answer:
Explanation:
The dual of a function means replace AND with OR and replace OR with AND.
XOR gate of A , B is
[tex]A \, XOR\, B = AB' + A'B[/tex]
So, Dual of A XOR B is ( replace AND with OR and OR with AND)
[tex]= (A+B')(A'+B)[/tex]
Complement of A XOR B is [tex](A XOR B) ' = (AB' + A'B) ' = ((A)' + (B')') ((A')' + (B)') = (A'+B)(A+B')[/tex] (In finding compliment AND becomes OR and OR becomes AND ).
By inter changing the above product of terms
Complement of [tex]A XOR B = (A + B') (A' + B)[/tex]
So, Dual of A XOR B = Complement of A XOR B.
After you create an array variable, you still need to ____ memory space.
a.
reserve
b.
create
c.
organize
d.
dump
Answer:
Answer is (a) reserve
Explanation:
Usually when we create an array variable, in some language the memory is allocated automatically. But in some the memory is not allocated automatically. So we need to reserve the memory space for the array.
For example in C++ dynamic memory allocation we need to allocate memory using new keyword.
A painting company has determined that for every 115 square feet or wall space, one gallon of paint and eight hours of labor will be required. The company charges $.18.00 per hour for labor . Write a program that allows the user to enter the number of rooms to be painted and the price of the paint per gallon. It should also ask for the square feet of wall space in each room. The program should have methods that return the following:
* The number of gallons of paint required
* The hours of labor required
*The cost of the paint
*The labor charges
*The Total cost of the paint job
The program to calculate the total paint cost and other values is given below.
#include <iostream>
using namespace std;
int main() {
int rooms, laborChrg = 18;
float paintChrg;
float feetPerRoom[rooms];
float paintReq, laborHrs, paintCost, laborCost, totalCost, totalsqft=0;
cout<<"Enter the number of rooms to be painted "<<endl;
cin>>rooms;
for(int i=0; i <= rooms; i++)
{
cout<<"Enter the square feet in room "<<endl;
cin>>feetPerRoom[i];
// shortcut operator which is equivalent to totalsqft = totalsqft + feetPerRoom[i];
totalsqft += feetPerRoom[i];
}
cout<<"Enter the cost of the paint per gallon "<<endl;
cin>>paintChrg;
laborHrs = (totalsqft/115)*8;
laborCost = laborHrs * laborChrg;
paintReq = totalsqft/115;
paintCost = paintReq * paintChrg;
totalCost = laborCost + paintCost;
cout<<"The number of gallons of paint required "<<paintReq<<endl;
cout<<"The hours of labor required "<<laborHrs<<endl;
cout<<"The cost of the paint is "<<paintCost<<endl;
cout<<"The labor charges are "<<laborHrs<<endl;
cout<<"The Total cost of the paint job is "<<totalCost<<endl;
return 0;
}
Explanation:
The header files for input and output are imported.
#include <iostream>
using namespace std;
All the variables are taken as float except labour charge per hour and number of rooms.
The user is asked to input the number of rooms to be painted. An array holds the square feet in each room to be painted.
cout<<"Enter the number of rooms to be painted "<<endl;
cin>>rooms;
for(int i=0; i <= rooms; i++)
{
cout<<"Enter the square feet in room "<<endl;
cin>>feetPerRoom[i];
totalsqft += feetPerRoom[i];
}
The above code asks for square feet in each room and calculates the total square feet to be painted simultaneously.
All the data to be displayed is calculated based on the values of labor charge per hour and gallons of paint needed, given in the question.
laborHrs = (totalsqft/115)*8;
laborCost = laborHrs * laborChrg;
paintReq = totalsqft/115;
paintCost = paintReq * paintChrg;
totalCost = laborCost + paintCost;
All the calculated values are displayed in the mentioned order.
A while loop is somewhat limited, because the counter can only be incremented by one each time through the loop.
True False
Answer:
False
Explanation:
In a while loop we can increment the counter by any number that we wish. It is not that the counter can only be incremented by one each time through the loop.
Below is an example of a while loop with counter incremented by 5 each time.
int count=0; //initialize count to 0
while(count<50){ //continue the loop till count is lesser than 50
cout<<count; //display the value of count
count = count + 5; //increment counter by 5 each time
}
Final answer:
The statement is false; a while loop can increment a counter by any amount based on the code within the loop's body.
Explanation:
The statement that a while loop is limited because the counter can only be incremented by one each time through the loop is false. In programming, a while loop can be used to increment or alter a counter variable by any amount, as dictated by the statements within the loop's body. The control of a while loop is based on a condition, and as long as the condition remains true, the loop will continue to execute.
For example:
int counter = 0;
while (counter < 10) {
counter += 2; // Increment counter by 2
}
In this example, the counter variable starts at 0 and increases by 2 on each iteration of the loop. You can increment the counter by any number, or even apply other operations to change its value in complex ways.
Why do we need the binary system?
Answer:
We need to have binary numbers because that is how computers process data.
Explanation:
Memory cache is referred to as ______. A. SRAM c. SROM b. DRAM d. DROM
Answer:
Answer is A. SRAM
Explanation:
Memory cache is called static RAM.
. Where is the bootstrap program usually located?
Answer and Explanation:
The bootstarp loader is also know as bootstrapping a bootstrap loader is usually located in EPROM (erasable programmable read only memory). It is a non volatile memory. The booststrap loader is automatically exicuted by the processor when we turn on the computer.Non volatile memory is that memory in which retain their content even when the power is swithed off.
Answer: Bootstrap program is generally found in the ROM (read only memory) else EEPROM (Electrically erasable programmable read-only memory)
Explanation:Bootstrap loader or program is referred as the program that gets into action or execution when there is the rebooting process in the operating system and it initializes it. It is usually located in EEPROM of the system. After the restarting of the computer system , all the loaded data gets transferred into the RAM(Random access memory).
.Compositionally designed systems have the followingcharacteristics except:
A.dynamic definition B.classes built from componentclasses C.encapsulation D.white-box reuse
Answer: C) encapsulation
Explanation:
As, encapsulation is the process by which the data is included from the protocol of the upper layer into lower layer of the protocol in the computer networking. Basically, in the networking it is the method of abstraction, as it allowed different functions by adding different layer. In encapsulation, the IP encapsulated packet are sent over the data link layers protocol for example ethernet.
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
Answer:
JAVA program to display the array elements both forward and backward is given.
public class MyProgram {
public static void main(String args[]) {
int len = 5;
int[] courseGrades = new int[len];
courseGrades[0] = 7;
courseGrades[1] = 10;
courseGrades[2] = 11;
courseGrades[3] = 9;
courseGrades[4] = 10;
System.out.println("The elements of array are ");
for(int i=0; i<len; i++)
{
System.out.print(courseGrades[i]+" ");
}
// new line is inserted
System.out.println();
System.out.println("The elements of array backwards are ");
for(int i=len-1; i>=0; i--)
{
// elements of array printed backwards beginning from last element
System.out.print(courseGrades[i]+" ");
}
// new line is inserted
System.out.println();
}
}
OUTPUT
The elements of array are
7 10 11 9 10
The elements of array backwards are
10 9 11 10 7
Explanation:
This program uses for loop to display the array elements.
The length of the array is determined by an integer variable, len.
The len variable is declared and initialized to 5.
int len = 5;
The array of integers is declared and initialized as given.
int[] courseGrades = new int[len];
We take the array elements from the question and initialize them manually.
First, we print array elements in sequence using for loop.
for(int i=0; i<len; i++)
To display in sequence, we begin with first element which lies at index 0. The consecutive elements are displayed by incrementing the value of variable i.
The array element is displayed followed by space.
System.out.print(courseGrades[i]+" ");
Next, we print array elements in reverse sequence using another for loop.
for(int i=len-1; i>=0; i--)
To display in reverse sequence, the last element is displayed first. The previous elements are displayed by decrementing the value of variable i.
At the end of each for loop, new line is inserted as shown.
System.out.println();
The length and elements of the array are initialized manually and can be changed for testing the program.
Loops are used to perform operations that would be repeated in a certain number of times; in other words, loops are used to perform repetitive and iterative operations
The loop statements are as follows:
for(int i = 0; i<sizeof(courseGrades)/sizeof(courseGrades[0]);i++){
cout<<courseGrades[i]<<" ";
}
cout<<endl;
for(int i=sizeof(courseGrades)/sizeof(courseGrades[0]) - 1; i >=0; i--){
cout<<courseGrades[i]<<" ";
}
cout<<endl;
The flow of the above loops is as follows
The first for loop prints the elements in a forward order.The second for loop prints the elements in a backward order.Read more about loops at:
https://brainly.com/question/11857356
____ is the encapsulation of method details within a class.
a.
Implementation hiding
b.
A calling method
c.
Instantiation
d.
An interface
Implementation hiding is the encapsulation of method details within a class. Implementation can be interpreted as those specifications which can be altered without altering the correctness of an application. Wrapping data/methods within classes (descriptions of the way all objects of this type will look/act) in combination with implementation hiding is called encapsulation. Information users need to know about behaviors should be available without dependence on implementation specifications.
Which window control button appears only when a window is maximized? ()
Maximize
Minimize
Restore
Close
Answer:
Restore
Explanation:
When the window is in minimized mode we get minimize, maximize, close buttons there.
When the window is in maximized mode we get minimize, restore, close buttons there.
An interface does not have ____.
A) return types
B) instance fields
C) abstract methods
D) public methods
Answer:
B - instance fields
Explanation:
Fields/variables declared within interfaces are by default final, public or static and hence will not be considered as an instance variable/field but a class variable. Although interfaces can be used to define instance methods, they will never have instance variables.
Compare and contrast the role that business users play when software is developed using Waterfall and Agile software development methodologies.
Answer: Both Agile and waterfall model are software development models to deliver a final outcome in the form of a software product. Waterfall model is sequential process with the requirements beings rigid and defined before beginning the software development.
Agile method basically concerned with the requirements of the client. Here both testing and development is carried out at the same time.
Explanation:
More differences between the two include :
Waterfall model is easy to manage whereas in agile model as the the client requirements changes and wants more functionalities is becomes a bit more difficult to manage. the role of project manager is very crucial in waterfall model whereas the role of developers ans testers is more important in Agile model.
Which ofthe following sentence beginnings would be best to use in apersuasive request?
a- We think it would begood if you . . .
b- We need you to give . ..
c- Will you please . . .?
d- It would be appreciatedif you....
Answer:
d- It would be appreciated if you...
Explanation:
Persuasive request
It is a request to change one's belief,attitude by the help of the written submission like letter etc.
There are three components-
Opening-Start with something different like quotes or greeting etc.
Body-It include main thing to focus on it.
Closing-It is the reminder of the appeal.
b We need you to give .. c- Will you please . . .? These two are directly going for the change(body),we will eliminate these.
a- We think it would be good if you . . . ,it is also approaching the result and we are using 'WE' so we can also eliminate this.
d- It would be appreciated if you....,In this we are starting with greeting. So it is a persuasive request.
Mergesort uses the divide-and-conquer technique to sort a list.
True
False
Answer:
True: Merge Sort sorts a list using divide-conquer approach.
Merge_Sort(B,p,n) //p is the starting index of array B and n is the last index.
1. if(p<n)
2. q ← (p+n)/2 //divides the list into two sub-lists
2. Merge_Sort(B, p, q) //sorts the left half
3. Merge_Sort(B, q+1, n) //sorts the right half.
4. Merge(B, p, q, n)
Merge(B, p, q, n)
1.l ← q-p+1. //no. of elements in left half
2.m ← n-q //no. of elements in right half.
3.for x ← 1 to l
4. Left[x] = B[p+x -1] //The elements of left half are copied to Left array
5.for y ← 1 to m.
6. Right[y]= B[q+y] //The elements of right half are copied to right array
7. x ← 1, y ←1
8.for z ← p to n.
9. if( Left[x] ≤ Right[y] ) // to merge the two lists Left and Right, the //elements are compared.
10. { A[z] ← Left[x] //smaller one comes to the merged list.
11. x++. }
12. else
13. { A[z] ← Right[y]
14. y++ }
Explanation:
The Merge_Sort(A, p, n) algorithm first divides the whole array into two halves. Then again divides the sub-lists into it's halves and so on.
Then using merge algorithm it compares the elements of both halves one by one and keep it in sorted order.
Write matlab programs to convert the following to binarynumbers.
a) 23
b)87
c) 378
d)2388
Answer:
decimal_no = 23;
binary_no = dec2bin(decimal_no);
matlab answer=10111 /*it is a string in matlab*/
now you just have to change the values of decimal_no
On putting 87
the answer is 1010111
On putting 378
the answer is 101111010.
On putting 2388
the answer is 100101010100.
Explanation:
We have used the inbuilt function in matlab dec2bin(decimal Number) it returns the binary number as a string.
Write a C++ programthat reads in the side of a square and prints out a pattern on$
symbols representing thatsquare. The program should work for side sizes between
2 and 10. For example, ifa size of 4 is entered, the following output should be
produced:
$$$$
$$$$
$$$$
Answer:
#include<iostream>
using namespace std;
//main function
int main(){
//initialize the variables
int side;
//print the message
cout<<"Please enter the side of square: ";
cin>>side; //read the vale and store in the variable.
// for loop
for(int i=1;i<=side;i++){ //lop for rows
for(int j=1;j<=side;j++){ //loop for column
cout<<"$"; //print the '*'
}
cout<<endl;
}
}
Explanation:
Create the main function and declare the variable side.
print the message on the screen for the user and then store value enter by the user on the variable side.
take the nested for loop for print the pattern.
nested for loop means, loop inside another loop it is used for print the pattern having rows and columns.
the first loop updates the row number and the second the loop print the character '$' in the column-wise.
in the code,
if i = 1, for loop check the condition 1 <= 5 if the value of side is assume 5.
condition is true and the program moves to the second for loop and starts to print the character '$' five times after that, print the new line.
then, the above process repeat for different rows and finally, we get the pattern in square shape.
Specialized vocabularyis known as:
o Equivocal terms
o Jargon
o Trigger words
o Biased language
Answer:
"Jargon"
Explanation:
Great question, it is always good to ask away and get rid of any doubts that you may be having.
Specialized vocabulary is sometimes also known as "Jargon" . These are sets of words that are used specifically and uniquely for specific sets of groups or organizations.
For example Lawyers Judges and other law enforcement officials have their own Specialized vocabulary that are better understood by other people in Law enforcement, people that are not part of Law Enforcement might have a hard time understanding.
I hope this answered your question. If you have any more questions feel free to ask away at Brainly.
Which of the following statements isNOT true about abstract data types (ADTs)?A list is anexample of an ADT.ADTs hide theimplementation details of operations from users.Java provides allthe ADTs you need, therefore you do not need to create any newones.An ADT is anabstraction of a commonly appearing data structure.
Answer:
Java provide all the ADTs you need,therefore you do not need to create any newones.
This statement is not true.
Explanation:
ADTs are those data types which we use but we didn't know their inner working that is how it is working what is happening inside.It is commonly used for Data Structures for example:- In stack we use push and pop operations to insert and to delete element from a stack respectively but we didn't know how it is happening inside.How the stack is implemented and etc.Java provides most of the ADT's but not all.
The statement that is wrong as regards abstract data types in this question is C: Java provides all the ADTs you need, therefore you do not need to create any new ones.
The abstract datatype can be regarded as special kind of datatype, whereby the behavior of the data is been defined by a set of values as well as a set of operations.ADTs can perform operation such as hiding of the implementation details of operations from users. It can be regarded as an abstraction of data structure that appear more oftenExamples of ADT are;
StackQueueListTherefore, option C is correct.
Learn more at:
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Write down the complete procedure for creating ExcelSheet.
Answer:
The complete procedure for creating Excel Sheet:
Excel sheets is defined as which are typically in tabs near the bottom left hand corner of the window, when a sheet gets open, it can only be viewed one at a time, however you can generated formulas and select the data from other sheets that can be used on another sheet's formula. Separated sheets are valuable for inserted separate charts and graphs, organizing the information from sheet.You are given three sheets with any new excel sheet.The default names are Sheet 1, Sheet 2, and Sheet 3 and are named on the tabs. These names can be changed accordingly by clicking on the tab name.We can also add the boundaries and label the rows.Please briefly describe your QA / testing process?
Answer: The QA/Testing process consist of the following:
1. Requirement specification
2. Reviewing the code.
3. Unit testing
4. Integration test
5. Performance testing
Explanation:
We start of by the requirement specification try to gather all the information accurately. Then begins the coding process where there is review of the code so that they perform their desired purpose. After modules are completed we perform unit testing of the different modules individually and also do the integration testing once all the modules are completed. At the end we perform the performance testing to take a note on their desired output and other quality parameters.
A final class can't be extended.
*True
*False
Answer:
The answer is True.
Explanation:
The final class cannot be extended because in java final keyword means "no modification". If it is applied to a variable or anything else then that value becomes a constant after that it cannot be modified.So in cases of class if final keyword is used it means that class cannot be extended.
What is the output of the following code segment? int n = 0; for (int k = 0; k< 2; k++) {n=n +2;} cout << n; oo 0 1 O O O
Answer:
4
Explanation:
The loop is used to execute the part of code or statement again and again until a condition is not true.
syntax of for loop:
for(initialize; condition; increment/decrement){
statement;
}
in the question, the value of n is zero.
then, for loop check the condition k<2, initially the value of k is zero. so, the condition is true and execute the code n = 0 +2=2
Then, k is increment by 1. so, the value of k is 1.
then, again loop run and check the condition 1<2, it true. then n = 2+2=4.
then, k is increment by 1. so, the value of k is 2.
Then, again check the condition 2<2, condition false and program terminate the loop and finally print the value 4.
What is an example of the most important role of a systems analyst in any corporation?
Answer: The system analyst is one of the most important members in any organisation. These system analyst has to analyse different data of the organisation which would help to bring out the different any new business policy changes or any kind of improvement.
Explanation:
An example to know this better would be the system analyst of a telecom company. Here the role of the system analyst would be bring out the design and implementation of new telecom information system and also should be aware of previous data of the organization. The system analyst would also be responsible to bring out the new business policies based on latest telecom standards and ensure the systems conforms to the latest standards.
Assuming deq is a deque object, the expression deq.push_front(elem) deletes the first element from deq.
True
False
Answer: False
Explanation:
This code code not deletes element from deq. This insert element at the beginning of deq. if it was deq.pop_front(elem) then it would have deleted the first element.
Therefore, it is false.
If the list above is named list1 and is implemented as a list, whatstatement would you use to find the number ofelements?list1.size()list1.numElementslist1.lengthlist1.contains
Answer:
list1.size()
Explanation:
In order to find the number of elements in a List , we can use the size() method defined in the java.util.List interface.
This method returns an integer which corresponds to the number of elements in the list.
The usage syntax example is as follows:
int num = list1.size();
If the list referenced by list1 contains 6 elements, then this method will return the value 6.
Which method(s) must a serializable class, implement?
? It must always implement both readObject andwriteObject
? It must implement either readObject orwriteObject, or both, depending upon the
desired behavior
? No Need to implement any methods
? None of the given option is correct
Answer: None of the given option is correct
Explanation:
A serializable class is implemented, when an object is serializable interface. If you want to serialize one of your classes, then the class must implemented in the Serializable interface. To implement the serializable interface, convert a class into the series of bytes and when serializable object might reference your class. Serializable classes are useful when you wanted to persist cases of the class or send them over wire.
What are minimum numbers of pins required for serialcommunication? Also write
their names?
Answer:
Serial communication are connected using 2 types of connector
Explanation:
The two types of connector for serial communication are:
1. Nine pin connector.
2. Twenty five pin connector.
for 9 pin connector we have:
pin 1 = data carrier detect
pin 2= received data
pin 3= transmitted data
pin 4= data terminal ready
pin 5= signal ground
pin 6= data set ready
pin 7= request to send
pin 8= clear to send
pin 9= ring indicator
Here, the minimum number of pins can be pin 2,3 and 5 which are receive, transmit and ground signal to establish a communication without handshaking.
The minimum number of pins actually depend on the type of software we use.
Relational DBMS are unable tostore multimedia objects. Does it underestimate RDBMS importance inreal world?
Answer:
It may underestimate the importance of RDBMS in real world as, database system for storing the multimedia object images and images,consequently the objects and operation become more complex that is why, it is degrading the performance of the application in RDBMS. It is also dependence on the structure query language as, it is comparatively simple query optimization and unable to handle complex applications.
A relational database is a combination of many relation in the form of two dimensional table of rows and the columns containing tuples. The rows are called as records and the columns are called as attributes.