) Doyou know applets and Java Beans in Java? Please briefly state eachone with an example.
Answer:
Java applets are the small programs written in java language.It is usually present on the web page .It has the also the property of working on HTML page and is client side based program which helps in making any website more attracting and active.
Example-the applet which is running a particular window can be overwritten in other window as well.
Java Beans are the type of class that are used for encapsulating the other object in it.The execution and use of java beans can be don by using builder tools. It follows the getter and setter technique that help in providing the value of different properties of by getting and setting it.
Example- AWT classes, Swing
Answer:
Java applets are the small programs written in java language.It is usually present on the web page .It has the also the property of working on HTML page and is client side based program which helps in making any website more attracting and active.
Example-the applet which is running a particular window can be overwritten in other window as well.
Java Beans are the type of class that are used for encapsulating the other object in it.The execution and use of java beans can be don by using builder tools. It follows the getter and setter technique that help in providing the value of different properties of by getting and setting it.
Example- AWT classes, Swing
What are the differences between a Required RFC and an Elective RFC?
Answer Explanation:
Difference between a required RFC and an Elective RFC :
The internet system can not be run without required RFC system for running internet the require RFC system is most important whereas elective RFC is not mandatory for running internet systemrequired RFC is by default adopted by the system whereas for elective RFC it is to be selected according to their userequired RFC surely change and the system will achieve minimum conformity whereas it is not clear that when elective RFC is applied the conformity will achieveWrite a program that asks the user to input four numbers (one at a time). After the four numbers have been supplied, it should then calculate the average of the four numbers. The average should then be displayed.
Answer:
Output
Enter first number:
1
Enter second number:
2
Enter third number:
3
Enter fourth number:
4
Average: 2.5
Explanation:
Below is the java program to calculate the average of four numbers:-
import java.util.Scanner;
public class Average {
public static void main(String[] args){
int a,b,c,d;
double average=0.0;
Scanner s=new Scanner(System.in);
System.out.println("Enter first number: ");
a=s.nextInt();
System.out.println("Enter second number: ");
b=s.nextInt();
System.out.println("Enter third number: ");
c=s.nextInt();
System.out.println("Enter fourth number: ");
d=s.nextInt();
average=(a+b+c+d)/4.0;
System.out.println("Average: "+average);
}
}
Once a try block is entered, the statements in a(n) ____ clause are guaranteed to be executed, whether or not an exception is thrown.
A) catch
B) String
C) close
D) finally
Answer:
D - Finally
Explanation:
Once the program has executed and exited the try-catch structure (when all error handling is completed), it always executes the finally clause. The finally clause is best utilized when you want code executed even if the try structure finds an exception.
When you block statements, you must remember that any ____ you declare within a block is local to that block.
a.
decision
b.
expression
c.
method
d.
variable
When you block statements, you must remember that any method you declare within a block is local to that block.
What is Block statement?Each single statement in a Java program must be executed in the correct order. When all connected statements are enclosed in braces, we can sometimes produce a block statement that will be read as a single statement and allow us to use many statements to denote a single unit of work.
A compound statement that has been paired with a block statement is comparable.
When the class is loaded by JVM class loaders, the static blocks will only ever be executed once (Much like other static variables present at the class level).
Therefore, When you block statements, you must remember that any method you declare within a block is local to that block.
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Assume the following variables are defined: int age; double pay; char section; write a single c instatement that will read input into each of these variables. in c ++
Answer:
scanf("%d %lf %c", &age, &pay, §ion);
Explanation:
To read the value in c program, the instruction scanf is used.
To read the integer value, use the %d format specifier in the scanf and corresponding variable name age with ampersand operator.
To read the double value, use the %lf format specifier in the scanf and corresponding variable name pay with ampersand operator.
To read the character value, use the %c format specifier in the scanf and corresponding variable name section with ampersand operator.
Convert the following Base 10 (decimal) numbers to base 2(binary):
107
200
Answer:
107₁₀ - 1101011
₂ (Binary representation)
200₁₀- 11001000₂ (Binary representation)
Explanation:
Converting from Decimal to binary:
Procedure -
1. Divide the number by 2, write the reminder separately.
2. Divide the divisor by 2, write the reminder before the previously written reminders.
Keep doing this till you get your divisor as 1.
Then we will write the divisor before the written reminders and that will be the binary representation.
For 107 :
We divide 107 by 2 ,we get the divisor 53 and remainder 1
( 1 )
Then,we will divide this divisor i.e 53 by 2,we get divisor 26 and remainder 1 ,we will put this remainder before the previous one.
( 1 1 )
Then,we will divide this divisor i.e 26 by 2,we get divisor 13 and remainder 0 ,we will put this remainder before the previous one.
( 0 1 1 )
Then,we will divide this divisor i.e 13 by 2,we get divisor 6 and remainder 1 ,we will put this remainder before the previous one.
( 1 0 1 1 )
Then,we will divide this divisor i.e 6 by 2,we get divisor 3 and remainder 0,we will put this remainder before the previous one.
( 0 1 0 1 1 )
Then,we will divide this divisor i.e 3 by 2,we get divisor 1 and remainder 1 ,we will put this remainder before the previous one.
( 1 0 1 0 1 1 )
As we get the divisor=1,then we will stop.we will write the divisor before the written reminders.
( 1 1 0 1 0 1 1 )
This will be the binary representation of 107.
For 200 :
We divide 200 by 2 ,we get the divisor 100 and remainder 0
( 0 )
Then,we will divide this divisor i.e 100 by 2,we get divisor 50 and remainder 0 ,we will put this remainder before the previous one.
( 0 0 )
Then,we will divide this divisor i.e 50 by 2,we get divisor 25 and remainder 0 ,we will put this remainder before the previous one.
( 0 0 0 )
Then,we will divide this divisor i.e 25 by 2,we get divisor 12 and remainder 1 ,we will put this remainder before the previous one.
( 1 0 0 0 )
Then,we will divide this divisor i.e 12 by 2,we get divisor 6 and remainder 0 ,we will put this remainder before the previous one.
( 0 1 0 0 0 )
Then,we will divide this divisor i.e 6 by 2,we get divisor 3 and remainder 0 ,we will put this remainder before the previous one.
( 0 0 1 0 0 0 )
Then,we will divide this divisor i.e 3 by 2,we get divisor 1 and remainder 1,we will put this remainder before the previous one.
( 1 0 0 1 0 0 0 )
As we get the divisor=1,then we will stop.we will write the divisor before the written reminders.
( 1 1 0 0 1 0 0 0 )
This will be the binary representation of 200.
In the structure of a conventional processor, what is the purpose of the data path?
Answer:
Datapath :- It is the hardware that performs every required operation for example:-registers,ALU, and internal buses.
Datapath is the brain of a processor because it executes the fetch-decode-execute cycle.
Steps in data path design are as following:-
(1) Find the instruction classes and formats in the ISA.
(2) Design data path components and connections for each instruction class .
(3) Create the data path segments designed in (Step 2) to yield a fused data path.
Simple datapath parts include memory (stores the current instruction), PC (program counter) and ALU(Arithmetic and Logic Unit).
What are Loop Errors? Describe briefly. What aresymptoms of Loop Errors?
Answer:
The errors in the loop condition such that it is not giving desired results or it is not running accordingly.There are different types of loop errors which are as following:-
1.Infinite loop:-When the is not able to stop then the error is called infinite loop. for ex:-
int i=1;
while(i!=0)
{
cout<<"I am King"<<endl;
i++;
}
2.Off by one error:-This error mostly happens in loop for arrays as indexing of the array is from 0 to size-1 .So looping over the array up to the size is a off by one error.
3.Equality v/s assignment operator error:-In this error the condition in the loop is like this d=f which is wrong since = is assignment operator it assigns the value of f to d while d==f checks that the value of d and f are equal or not.
4.&& v/s || loop error:- In this error we use and operator (&&) instead of or operator (||) and vice versa.
symptoms of loop errors are not the desired output.
The destructor automatically executes when the class object goes out of ____.
A.
scope
B.
use
C.
phase
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.
All of the following are guidelines for effective small talk EXCEPT
a.discuss controversial topics.
b.avoid monologuing.
c.stress similarity rather than differences.
d.answer questions with sufficient elaboration.
Answer:
A - Discuss controversial topics
Explanation:
Small talk refers to polite, informal conversation that people engage in during social occasions. It is meant to be lighthearted, usually concerning unimportant topics. Therefore, the discussion of controversial topics goes against the purpose and characterization of effective small talk.
You can leave out the ____ statements in a switch structure.
a.
switch
b.
if
c.
case
d.
break
Answer:
break
Explanation:
Break is the statement in the programming which is used to terminate the loop or case in the switch structure.
Break immediately terminate or move program control to next statement outside the loop or switch structure.
For example:
for(int i=0;i<4;i++)
{
print("hello world");
break;
}
when the program execution reach to the break statement. The loop structure terminate and program control goes to next of for loop.
similarly for switch case,
switch(int number)
{
case 1:
print("hello");
break;
}
when the program execution reach to the break statement. it terminate the switch structure.
Kleene star of {1} generates {1, 11, 111, 1111, 11111……}.
True
False
Answer:
False
Explanation:
Kleene star is a unary operation, we can perform this on a character or set of strings.It means zero or more than zero up to infinite.
It is represented by Vˣ or V+.
For 1, the kleene star will be empty string '∈' or any number of strings.
1ˣ =(∈,1,11,111,1111,11111......)
In question, the empty string '∈' is not present.
Write a C++ program to convert rainfall in inches to rainfallin millimeters given that:
1 inch = 25.4 mm
Sample output: 4 inches = 101.6 mm of rain
Answer:
#include <iostream>
using namespace std;
int main() {
float rainfall_inch,rainfall_mm;//declaring two variables of float type to hold the value rain in inches and mm.
cin>>rainfall_inch;//taking input of rain in inches..
rainfall_mm=rainfall_inch*25.4;//conveting inches to mm and storing in raingfall_mm.
cout<<rainfall_inch<<" inches = "<<rainfall_mm<<" mm of rain"<<endl;//printing the output.
return 0;
}
Explanation:
The above written program is in c++ for converting the rainfall in inches to mm.
I have taken two variables of type float to store the values of rainfall in inches and mm.
Conversion of inches to mm.
Printing the result.
- If we place records from different tables in adjacent____________, it would increase efficiency of a database.
Physical location
Table
Form
empty location
Answer: Physical location
Explanation:
If we place records from, different tables in adjacent physical location, it would increases efficiency of a databases as, database consolidates records from previously store in separate files into a common file. Databases are fast and efficient when they are dealing with large data. When all the information is stored in multiple physical location it is also known as distributed database, as physical location helps to provide the physical and logical path and also protect from default locations in the database.
Lube job---------$18.00
The question pertains to an automotive service known as a 'Lube Job,' which costs $18.00 and involves lubricating vehicle parts to ensure they function properly.
Explanation:The phrase 'Lube job---$18.00' refers to a service commonly offered at automotive maintenance and repair shops. This service includes lubricating the chassis and other moving parts of the vehicle to ensure proper functionality and to prevent wear and tear. The cost indicated is $18.00, which would be the price a customer is expected to pay for this service. This topic relates to business operations, particularly in the area of automotive service and maintenance.
Where does execution resume after an exception has been thrown and caught?
Answer:
The execution resumes in the finally block if one exists or otherwise from the next statement following the try...catch block.
Explanation:
Once an exception has been thrown and caught in the code, the execution continues with the statements in the finally block if one exists. If there is no finally block defined then execution resumes from the next statement following the try... catch block. For example:
try{
//An exception is raised
}
catch (Exception e){
//Exception is handled
}
System.out.println("After try...catch");
In this code segment, the next statement to be executed after catch is the System.out.println();
Discuss some of the emerging trends in information technology (e.g. computer hardware, software, data analysis). What impact may they have on your daily life (e.g., workplace, school, recreation)?
Answer:
Artificial Intelligence and IOT
Explanation:
Great question, this is an important topic in the world today.
One huge emerging trend in the world of information technology today is Artificial Intelligence and IOT also known as the Internet of Things. Artificial Intelligence today can be found in just about any smart device. They are capable of searching the internet instantaneously in order to solve a problem and compare hundreds and thousands of scenarios in a couple of seconds in order to answer questions and solve problems.
Combining this with the Internet of Things , which is a worldwide web of interconnected devices. Artificial Intelligence has the ability to change our world beyond recognition in the next decade, by automatizing everything that requires human involvement to complete today.
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Make a ladtract class that has 2 fields, one for the tractor's length and one for the width. The class should have a method that returns the tract's area as well as an equals methos and a toString method.
Explanation:
Below is the java code for the ladtract class :-
public class ladtract
{
private double length; //length of tractor
private double width; //width of tractor
public double calculateArea(){
return length*width; //calculate and return the area of the tractor
}
public boolean equals(Object o) {
if (o == this) { //check if it's the same object
return true;
}
if(o.length==this.length && o.width==this.width){ //check if the length and width are same for both objects
return true;
}
return false;
}
public String toString(){
return "Area="+calculateArea(); //return the area of the tractor as a string
}
}
In an array list the time complexity of the remove function is identical to the time complexity of the ____ function.
A.
insert
B.
isEmpty
C.
isFull
Answer:
C. is Full
Explanation:
In an array list the time complexity of the remove function is identical to the time complexity of the ''isFull'' function.
In an array list, the time complexity of the remove function is identical to the time complexity of the full function. Thus, the correct option for this question is C.
What is an Array list?An array list may be defined as a part of the Java collection framework that significantly provides dynamic arrays in Java to the users. It extends its size in order to accommodate new elements and shrinks its size when the elements are eliminated.
According to the context of this question, the time complexity of the remove function specifically eliminates all sorts of elements that are involved or included in Java collection. This is identical to the time complexity of the full function.
Therefore, in an array list, the time complexity of the remove function is identical to the time complexity of the full function. Thus, the correct option for this question is C.
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(TCO 4) What will the following program segment display? int funny = 7, serious = 15; funny = serious % 2; if (funny != 1) { funny = 0; serious = 0; } else if (funny == 2) { funny = 10; serious = 10; } else { funny = 3; serious = 3; } cout << funny << " " << serious << endl; }
Answer:
3 3
Explanation:
The operator modulus '%' is gives the reminder of the number.
for example:
7%2 it gives the result 1 because 1 is reminder after divided by 2.
Initially the value of funny is 7 and serious is 15.
then, 15 is modulus by 2 which gives 1 and it store in the funny.
After that, if else statement check for condition.
funny != 1 this condition is FALSE because Funny is equal to 1.
it moves to else if part Funny == 2 condition again FALSE it then move to else part and execute the statement Funny contain 3 and serious contain 3.
and then display.
Therefore, the answer 3 3.
Answer:
It'll be 3 3. Just because i think it is, duh
Explanation:
Using the flowchart above, which decision statement will correctly check that hoursWorked is greater than or equal to the FULL_WEEK constant?
a.
hoursWorked >= FULL_WEEK
b.
hoursWorked > FULL_WEEK
c.
hoursWorked == FULL_WEEK
d.
hoursWorked != FULL_WEEK
Answer:
hoursWorked >= FULL_WEEK
Explanation:
The operator sign and meaning:
> means greater than
< means less than
= equal sign
! means NOT operator
== means equal equal sign
Option a: hoursWorked >= FULL_WEEK
It means hoursWorked is greater than or equal to FULL_WEEK.
Option b: hoursWorked > FULL_WEEK
It means hoursWorked is greater than to FULL_WEEK.
Option c: hoursWorked == FULL_WEEK
It means hoursWorked is equal equal to FULL_WEEK.
Option d: hoursWorked != FULL_WEEK
It means hoursWorked is not equal to FULL_WEEK.
Therefore, Option a is the correct option.
The correct decision statement to check if 'hoursWorked' is greater than or equal to 'FULL_WEEK' is 'a. hoursWorked >= FULL_WEEK'. This includes scenarios where 'hoursWorked' is exactly a full week or more.
Explanation:The decision statement that will correctly check whether hoursWorked is greater than or equal to the FULL_WEEK constant is:
a. hoursWorked >= FULL_WEEK
This statement checks if the variable hoursWorked is at least equal to the value of the FULL_WEEK constant. It covers both the scenario where hours worked are exactly equal to a full week and any amount of hours that is greater. In contrast:
b. is more than seven hours.c. only checks for exact equality with seven hours.d. checks for inequality, meaning not equal to seven hours.Write an if else statement that assigns 0 to the variable b and assigns 1 to the variable c if the variable a is less than 10. Otherwise, it should assign -99 to the variable b and assign 0 to the variable c.
Answer:
if(a < 10)
{ b = 0; c = 1;}
else
{ b = -99; c = 0;}
Explanation:
The if-else statement assigns values to variables b and c based on the condition whether a is less than 10. It assigns 0 to b and 1 to c if a < 10; otherwise, it assigns -99 to b and 0 to c.
This if-else structure is a fundamental concept in programming, allowing conditional execution of code based on whether a condition is true or false. For instance, if a equals 5, the values assigned will be b=0 and c=1, because 5 is less than 10. Conversely, if a equals 15, the assignments will be b=-99 and c=0.
if (a < 10) {. Which of the following personality characteristics areassociated
with people who are likely to exhibit violent behavior on thejob?
a. Neurotic
b. Optimistic
c. Extraverted
d. Type A
Answer:
The correct answer is A. People that are likely to exhibit violent behavior on the job are associated with neurotic personality.
Explanation:
Neurosis or neuroticism is a psychological tendency to maintain certain difficulties for emotional control and management.
People with high levels of neuroticism usually have low moods, close to depression or dysthymia, and show negative feelings such as envy, anger, anxiety and guilt. Neurotic people present this symptomatology much more frequently and severe than people who do not suffer from this condition.
The personality characteristic that is associated with people who have the tendency to display violent behavior on the job is: a. Neurotic.
Who is a Neurotic Person?Neurotic is a term used to described someone that is afflicted by neurosis. It implies a drastic and irrational mental, emotional or psychical reactions that are often out of proportion towards a minor problem.
Therefore, the personality characteristic that is associated with people who have the tendency to display violent behavior on the job is: a. Neurotic.
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Which of the following are examples of the concept of layered access in physical security? Select one: a. Firewall, IDS, CCTV b. Fences, gates, monitored doors c. CCTV, walls, antivirus d. RFID, biometrics, personal firewalls
Answer:
b. Fences, gates, monitored doors
Explanation:
The best defense is a good defense. A good security system is reliable and will provide you with a criminal-deterrent protection, detect intrusions, and trigger appropriate incident responses. It involves the use of multiple layers of interdependent systems like protective guards, locks, protective barriers, fences, and many other techniques.
B. Fences, gates, monitored doors
Further explanation
Fences, Gates, and Doors are one form of physical security in the concept of layered access.
A fence is an upright structure designed to limit or prevent movement across its boundaries. Apart from functioning as a property boundary, the presence of a fence also protects or secures the building from unwanted things, for example, the presence of uninvited guests. Completing its functions as a protector and security, the fence must be made with a sturdy construction so that it is not easily broken. The gate is a place to exit or enter a closed area surrounded by a fence or wall. The gate can be shaped simple next to the fence and has a decorative and monumental. Other terms for gates are doors and gates A door is an opening in a wall/area that facilitates circulation between spaces enclosed by a wall/area. Doors can also be found in buildings, such as houses and buildings. In addition, there is also a car door, wardrobe, etc.
Physical security is the protection of staff, hardware, programs, networks, and data from physical conditions and events that can cause damage or damage to the organization. Staff, important assets, system.
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Details
Class: College
Subjects: Computers and Technology
Keywords: security, protection, access
Write a function called vowels that takes a string s and returns the number of vowels in the string: i.e. the number of letters that are
Answer:
int vowels(string s){
int count=0;
for(int i=0;s[i]!='\0';i++){
if(s[i]=='a' || s[i]=='e' ||s[i]=='i'||s[i]=='o'||
s[i]=='u'||s[i]=='A'||s[i]=='E'||s[i]=='I'||
s[i]=='O' || s[i]=='U'){
count++;
}
}
return count;
}
Explanation:
Create the function with return type int and declare the parameter as a string.
define the variable count for storing the output. Then, take a for loop for traversing each character of the string and if statement for checking the condition of the vowel.
vowel are 'a', 'e', 'i', 'o', 'u' in lower case. we must take care of the upper case as well.
vowel are 'A', 'E', 'I', 'O', 'U' in upper case.
if the condition is true to update the count by 1.
This process continues until the string not empty.
and finally, return the count.
Use mathematical induction to prove that n(n+5) is divisible by 2 for any positive integer n.
Answer:
Explanation:
We can deduce from the formula that any result from a positive integer for n will be divisible by 2, because of the following facts.
If n is an odd number, then n+5 will equal an even number. Also since an even number multiplied by an odd number equals an even number it is thereby divisible by 2.
Example: 3(3+5) ⇒ 3(8) = 24 (divisible by 2)
If n is an even number, then n+5 will equal an odd number, and as stated above any integer multiplied by an even number will equal an even number thus making it divisible by 2.
Example: 2(2+5) ⇒ 2(7) = 14 (divisible by 2)
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To alter just one character in a StringBuilder, you can use the ____ method, which allows you to change a character at a specified position within a StringBuilder object.
a.
insert()
b.
setCharAt()
c.
append()
d.
charAt()
Answer:
setCharAt()
Explanation:
StringBuilder is a dynamic object that allow to create the string with no size restriction.
To answer the question, let discuss each option.
Option a: insert()
insert function is used to insert the element at the specific location but it does not change the rest of the character.
Option b: setCharAt()
it is used to change the value at specific location, it takes two argument location and character.
Option c: append()
it is used to connect the two string but it does not change the rest of the character.
Option c: charAt()
it is used to get the character at specific location. it does not allow the change.
Therefore, option b is correct option.
Write a program to check if two strings are different by one and only one character (when checked character by character). For example, lake and bake are different by one and only one character. pal and pale, bus and bit, kite and bit are NOT different by one and only one character.
C program to check if two strings are different by one and only one character
#include<stdio.h>
#include<string.h>
//driver function
int main()
{
int result;
char f_string[100],s_string[100]; /* Declaring f_string and s_string as strings*/
printf("Enter the first string : \n"); // Taking inputs from user
scanf("%s",f_string);
printf("Enter the second string : \n"); //
scanf("%s",s_string);
int l1 = strlen(f_string); // calculating length of strings
int l2 = strlen(s_string);
int difference = 0; // For storing the count difference in strings
if(l1==l2) // Checking lengths of string
{
for(int i=0;i<l2;i++)
{
if(f_string[i] !=s_string[i]) /*checking each character of f_string with the same character index of s_string*/
difference++; // updating the count difference
}
}
result=difference;
if(result==1) // if there is only one character difference
printf("The two strings are replaced by one character");
else
printf("The two strings are not replaced by one character");
}
Output
Enter the first string : lake
Enter the second string : bake
The two strings are replaced by one character
Enter the first string : pal
Enter the second string : pale
The two strings are not replaced by one character
Enter the first string : bus
Enter the second string : bit
The two strings are not replaced by one character
Enter the first string : kite
Enter the second string : bit
The two strings are not replaced by one character
The ____ method lets you add characters at a specific location within a StringBuilder object.
a.
append()
b.
charAt()
c.
insert()
d.
setCharAt()
Answer:
insert()
Explanation:
StringBuilder is a dynamic object which is used to create the string without any size restriction.
let discuss the option:
option a: append()
It is a function which is used to append the two string. but it not add the character at specific location.
option b: charAt()
it is function which is used to get the character at specific location.
option c: insert()
It is a function which is used to add the character at specific location, it takes two parameter location and character.
option d: setCharAt()
it is a function which is use to update the character at specific location.
Therefore, the correct option is c.