Answer:
scope
Explanation:
Destructor is a member function and it call automatically when the class object goes out of scope.
Out of scope means, the program exit, function end etc.
Destructor name must be same as class name and it has no return type.
syntax:
~class_name() { };
For example:
class xyz{
xyz(){
print(constructor);
}
~xyz(){
print(destructor);
}
}
int main(){
xyz num;
}//end program
when the object is create the constructor will called and when the program end destructor will call automatically.
Which keyboard shortcut is typically used to move to the previous entry box?
A. Ctrl+Enter
B. Tab
C. Enter
D. Ctrl+Tab
Answer:
D. Ctrl+Tab
Explanation:
The Ctrl+Tab shortcut is typically used to move to the previous entry box.
What are the attributes of agood Software Test?
Answer:
The features of a software test to be efficient are basically used to measure the quality control so that prevention can be provided from the errors or sort of defects. These characterstics are used for quality assurance and focuses on detecting the efficiency of the products and its services.
The some characteristics of a good software test are as follows:
Testing-ability - System should reliable on detection of any failure or error.
Efficiency -should be reliable enough to carry out tasks .
Reusability - Should be useful for several purpose at different times.
Maintainability - maintenance should be easy and efficient.
Write difference in the form of a table between Ping and TraceRoute command?
Explanation:
Ping
A network utility which is mainly used to test the connection between two devices or nodes. Ping is used to test the connectivity of a network and its name resolution.Syntax: ping <ip address>TraceRoute
A network utility which is mainly used to track the path followed by a packet within a network from the source to the destination.It helps to trace the exact pathway of the data packet from the source to the destination.Syntax: tracert <ip address>
True / False
Some versions of the Von Neumann model include the stored program concept, but not all of them.
Answer: True
Explanation:
The Von Neumann model is based on the concept of stored program where both of the program and instruction data are stored in the same electronic memory. Though it is still used in many models but due to the Von Neumann bottleneck we have the introduction of the secondary memory.
When you declare a method as abstract method ? Can I call a abstract method from a non abstract method ?
Answer: A method without body is called abstract method. A abstract method can be called from a non abstract class or method provided it is inherited using a subclass.
Explanation:
An abstract method is a method which does not have a body, it just has opening and closing curly braces. A class having an abstract method is also declared as abstract class. We cannot make an object of the abstract class.
example : public abstract float multiply(float x, float y);
is an example of abstract method.
calling an abstract method from a non abstract method is possible provided it is inherited by a non abstract subclass.
A ____________________ can be used to hierarchically represent a classification for a given set of objects or documents. A. taxonomy B. framework C. scheme D. standard
Answer:
A. taxonomy
Explanation:
A taxonomy can be used to hierarchically represent a classification for a given set of objects or documents.
for a small to medium enterprise , the benefits of setting up an e-commerce store front include ( choose all that apply)
A. The ability to offer a larger selection of products
B. the ability to reach a wider customer base
C. the ability to eliminate advertising
D. the ability to offer lower prices to customers
Answer:
All of the above
Explanation:
The ability to reach a wider customer base, the ability to offer lower prices to customers, the ability to offer a larger selection of products and the ability to eliminate advertising. The correct options are A, B, C and D.
What is e-commerce store front?An electric storefront is a web-based solution that allows business owners to advertise and sell goods and services over the internet.
This is a fundamental form of e-commerce in which the buyer and seller interact directly.
To enable merchants to sell their products online, it combines transaction processing, security, online payment, and information storage.
A storefront, also known as a shopfront, is the facade or entryway of a retail store on the ground floor or street level of a commercial building, typically with one or more display windows.
A storefront's purpose is to draw attention to a company and its products.
The makes it possible to reach a larger customer base, to offer lower prices to customers, to offer a larger selection of products, and to eliminate advertising.
Thus, all options are correct.
For more details regarding storefront, visit:
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One lap around a standard high-school running track is exactly 0.25 miles. Write a program that takes a number of miles as input, and outputs the number of laps. Output each floating-point value with two digits after the decimal point, which can be achieved as follows: System.out.printf("%.2f", yourValue); Ex: If the input is:
Answer:
import java.util.Scanner;
public class Miles {
public static void main(String[] args) {
//initialization
double Number_Miles;
//print the message
System.out.print("Enter the number of miles: ");
Scanner scn1 = new Scanner(System.in);
Number_Miles = scn1.nextDouble(); //read the input from user
//calculate the laps
double yourValue = Number_Miles/0.25;
//display the output on the screen
System.out.printf("%.2f", yourValue);
}
}
Explanation:
First import the library Scanner than create the class and define the main function. In the main function, declare the variables.
print the message on the screen and then store the value enter by the user into the variable.
Scanner is a class that is used for reading the output. So, we make the object of the class Scanner and then object call the function nextDouble() which reads the input and store in the variable.
After that, calculate the number of laps by dividing the number of miles with the given one lap running track value (0.25 miles).
[tex]Number\,of\,laps = \frac{Number\,of\,miles}{0.25}[/tex]
the output is stored in the variable.
After that, print the value on the screen with 2 digits after the decimal point.
we can use "%.2f" in the printing function in java.
like System.out.printf("%.2f", output);
Answer:
def miles_to_laps(miles):
return miles / 0.25
miles = 5.2
num_of_lap = miles_to_laps(miles)
print("Number of laps for %0.2f miles is %0.2f lap(s)" % (miles, num_of_lap))
Explanation:
A database is called "self-describing" because it contains a description of itself.
A.
True
B.
False
Answer:
true
Explanation:
what is Interrupt?and give me information about Interruptstypes and processes and works?
Answer:
Interrupt is defined as, in computer system interrupts are the signal sent to the central processing unit by the external devices. The main function of interrupt is that, an operating system that provide multiprocessing and multitasking. The interrupt is a signal that causes the operating system to stop work on one processor and started work on another processor.
There are basically two type of interrupts:
Hardware interrupts - For the processor, if the signal is from external device and hardware is called hardware interrupts.Software interrupts - The interrupt which is caused by the software instructions are called software interrupt.
What is the output after the following code executes?
int x=10; if ( ++x > 10 ) {
x = 13;
}
cout << x;
Answer:
13
Explanation:
First understand the meaning of ++x, it is a pre-increment operator.
it means, it increase the value first than assign to the variable.
For example:
x=10
then after executing ++x, the value of x is 11.
it increase the value and assign to x.
In the question:
The value of x is 10. After that, program moves to the if condition and check for condition (++x > 10) means (11 > 10) condition true.
then, 13 assign to x.
After that value of x is printed as 13.
Final answer:
The C++ code increments the variable x to 11 due to the pre-increment in the if statement, then changes x to 13 within the if block. Thus, the output of the code, when executed, is 13.
Explanation:
When the C++ code provided is executed, the statement int x=10; initializes the variable x with the value 10. The subsequent if statement checks if ++x > 10, where ++x is a pre-increment operation that increases x by 1 before the comparison. Since x is incremented to 11 before the comparison, the if block is executed, setting x to 13. The cout << x; statement then outputs the value of x, which at this point will be 13.
The characters << indicate that the value to the right is to be sent to the cout, which identifies the standard output stream. For cout to work, we need the inclusion of the iostream header file and the usage of the using namespace std; directive.
Which of the following electronic payments is ideal for micropayments?
A. purchasing cards
B. smart cards
C. none of the methods listed
D. electronic checks
Smart cards are ideal for micropayments.
In ________ for final fields and methods the value is assignedlater but in ______ you assign the value during declaration.
Java , C++
C++ , C#
Java , C#
C++ ,Java
Answer:
The answer to this question is Java,C++.
Explanation:
We can assign non static final variables a value with the declaration or in the constructor but this is not the case with c++ because we have to assign value during declaration and c++ equivalent of final is const keyword and there is sealed or readonly keywords in c# not final.If we do not assign value at the time of declaration the const variable will contain garbage value which cannot be changed afterwards.
Answer:
The answer to this question is Java,C++.
Explanation:
We can assign non static final variables a value with the declaration or in the constructor but this is not the case with c++ because we have to assign value during declaration and c++ equivalent of final is const keyword and there is sealed or readonly keywords in c# not final.If we do not assign value at the time of declaration the const variable will contain garbage value which cannot be changed afterwards.
.The operation signature has all the following except:
A.name of the operation B.object accepts C.algorithm ituses D.value returned by the operation
Answer: C) algorithm it uses
Explanation: The operation signature has the name of operation ,objects that it accepts and the value returned by the operation but it does not have algorithm that it uses.As algorithm defines all the steps that are to be used to find the result so signature operation does not include the whole algorithm that is to be used. The signature operation verifies the steps of the algorithm in way.
Decision trees are best suitedfor:
one decision inone period.
one decision overseveral periods.
several decisionsover one period.
several decisionsover several periods.
None ofthese.
Answer: Decision Trees are best suited for several decisions over one period.
Explanation:
Decision tree gives an effective method for making decisions. It is a tree-like model used for decisions and analyses consequences, including resources cost, outcome and utility. It also helps us to make best and good quality decisions on the basis of given information. It is also widely used in machine learning and commonly used in data mining as a tool.
What are the advantages and disadvantage of integers and floating numbers?
Answer:
Explanation:
Advantages of int and disadvantages of float are as following :-
1.Arithmetic operation on int variables are much faster than float variables.
2.int variables does not suffer from precision loss while float variable sometimes suffer from it.
Advantages of float variables and disadvantages of int variables are as following:
1.float variables can represent values between integers.While integers cannot do that.
2.Float can represent much greater range of values than integers.
Data mining must usestatistics to analyze data.
True
False
Answer: True
Explanation: In data mining, they use statistics component for the analyzing of the large amount of data and helps to deal with it. Statistics provide the techniques for the analyzing, evaluating and dealing with the data that is known as data mining.Data statistics provide the help to organize large data in a proper form and then analyze it. Thus, the statement given is true that data mining must use statistics to analyse data.
If a CPU receives theinstruction to multiply the byte-sized values $12 and $3E, thisaction will take place in the ______________ (part of internal CPUhardware) section of the CPU.
Answer: Arithmetic and logic unit(ALU)
Explanation: In central processing unit (CPU) , there are two main units CU(control unit) and ALU (arithmetic and logic unit) . ALU is responsible for any sort arithmetic and logical operation in the processor.This unit can perform mathematical operation like addition , multiplication divide , logical and many more. So the given operation of multiplication in the question will be done bu ALU of the CPU.
Write a program that prompts the user to enter the number of students and each student's name and score, and finally displays the student with the highest score and the student with the second highest score.
Answer:
see attachment
Explanation:
You have not specified the language, or the details of the I/O form or prompts. Here is a program that does that, written in Wolfram language (the language of Mathematica).
It prompts separately for student name and student score. The minimum score is presumed to be higher than -99999. If only one student name is entered, the second output is that score with no name listed. There is no error checking.
We have elected to keep a list only of the two two scores, and to sort that list again each time a new entry is made.
__
The attachment shows the output of the program below the program listing.
In Online Data Extraction data is extracteddirectly from the ------ system itself.o Hosto Destinationo Sourceo Terminal
Answer:
system itself.
Explanation:
In Online Data Extraction data is extracted directly from the system itself.
FS and GS are two___________________ in protected mode.
? segment registers
? segment selectors
? stack pointers
? register pointers
Answer:
Segment registers
Explanation:
The initial purpose behind the segment registers was to enable a program to access many distinct (big) memory sections designed to be autonomous and part of a constant virtual store.
They don't have a processor-defined objective, but instead Operating system runs them for purpose. The GS register is used in Windows 64-bit to point to constructions defined by the operating scheme. Operating system kernels usually use FS and GS to access thread-specific memory. In windows, thread-specific memory is managed using the GS register. To access cpu-specific memory, the linux kernel utilizes GS.
Explain the purpose (using only two sentence in each case) of eachof the following
components of UML
• Use case diagram
• Use case description
• Class diagram
• Sequence diagram
• Business or Domain model
Answer:
UML - Unified Model Language
Explanation:
Use case diagram:
A use case diagram is used to tell how many ways a user can interact with a system. We use special symbols and connectors to build use case diagrams.
We use horizontal shaped ovals to represent use cases, stick figures to represent actors, lines to represent associations between use cases and
actors, packages to put elements into groups.
Use case description:
By the name itself, we can say that it is used to describe the activities of user that he can do with the system and how the system responds to those. Before use case diagram created, we need to write a use case description.
Class diagram:
UML diagrams are of two types. They are,
Structural UML diagrams Behavioral UML diagrams
A class diagram comes under Structural UML diagrams.
Classes are building blocks of an application that uses OOPs concepts. Class diagrams are used to represent classes, relationships, association,
interface.
Sequence diagram:
A sequence diagram comes under Behavioral UML diagrams.It is used to tell the sequential order of objects' interaction.We have many notations in this diagram like actors, lifeline, create message, delete message, lost message, found message etc. It is used to tell how messages move between objects in a system.
Domain model :
A domain model is a visual representation of real- situation objects. In UML, the Domain Model is illustrated with a set of class diagrams
. Frequency band in which 99% of the total power resides iscalled _________
a. Power bandwidth
b. half power bandwidth
c. 3dB bandwidth
d. 4dB bandwidth
Answer:
Frequency band in which 99% of the total power resides iscalled Power bandwidth-a.
What are .Classification for computer softwares?
Answer: Classification of computer software are:-
System softwareApplication softwareExplanation:
System software-it is the type of software that takes input from other device ans sources and then covert it into machine language that is understood by the operating software.E.g.-UNIX Application software- it is the software that is connected with the end user through application present on the operating system which is accessed directly by the user. E.g.-Internet ExplorerWhat is the advantages and disadvantagesof International Standards for NetworkProtocols.
Answer:
Advantages and disadvantages of international standards for network protocols are:
Advantages -
Due to common underlying standard maintenance and installation become easy. Many computers can connect together from all the worldwide, as they are using the international standard for network protocol. One of the main advantage using international standard as it boost up growth and economy.Disadvantages -
Every network standard has its own limitations in a particular domain. Once it is spread worldwide then it is difficult to resolve network issues.Write a program which prompts user to enter a character, if the user presses „Z‟, the program asks user to enter a number. In this case the program implements 5-input majority voting logic which is explained as follows.The value of the number represented by the five leftmost bits of Register-B is tested. If the number of logic '1' bits (in the 5 leftmost bits) is greater than the number of logic '0' bits, the program should output: "The number of 1’s in the 5 left most bits is greater than the number of 0’s". If the number of logic '0' bits (in the 5 leftmost bits) is greater than the number of logic '1' bits, the program should output: "The number of 0’s in the 5 left most bits is greater than the number of 1’s"
Programs that are embedded in a Web page are called Java ____.
a.
consoles
b.
windowed applications
c.
applications
d.
applets
1 points
Answer:
applets
Explanation:
Java applets are dynamic programs that can be embedded on a webpage and run on a web browser like internet explorer,firefox or google chrome. The code for applets is developed using java programming language and facilitates interesting and complex display entities to be included as part of the web page. HTML provides a special tag called <Applet> for providing details of the applet.
What is the height of the tallest possible red-black tree containing 31 values?
Answer:
The height of tallest possible red-black tree having 31 values is 10.
Explanation:
The height of tallest possible red-black tree = 2㏒₂(n+1)
here we have n=31 So substituting the value of n in the equation.
=2㏒₂(31+1)
=2㏒₂(32)
=2㏒₂(2⁵) since ㏒(aⁿ)=n㏒(a)
=2x5㏒₂(2)
=10㏒₂(2) since ㏒ₙ(n)=1.
=10.
Class objects cannot be passed as parameters to functions or returned as function values.
True
False
Final answer:
The statement is false; class objects can indeed be passed as parameters to functions and returned as function values in many object-oriented programming languages.
Explanation:
The statement that class objects cannot be passed as parameters to functions or returned as function values is false. In many programming languages, especially those that support Object-Oriented Programming (OOP), it is common to pass objects as arguments to functions or methods, and also to return them as function values. This is part of the encapsulation feature in OOP, where an object bundles data and methods that operate on that data, allowing the methods direct access to the object's data without necessarily passing them as individual parameters.
For example, consider a Python class named Book. You can create an instance of this class and pass it to a function:
def display_book_info(book):
print(book.title)
print(book.author)
my_book = Book("Pride and Prejudice", "Jane Austen")
display_book_info(my_book)
In this case, my_book, which is an object of the class Book, is being passed as a parameter to the function display_book_info.
Discuss briefly general-purpose graphicsprimitives that contain 2D graphics library.
Answer:
General purpose graphics primitives that contain 2D graphic library as, it is used in graphics processing unit which typically manage computation for computer graphics. Graphic primitives contain basic element such as lines and curves. Modern 2D computer graphic system that operate with primitives which has lines and shapes. All the elements of graphic are formed from primitives.