Answer: (D) Database design follows the twelve principles proffered by Dr. Edgar F. Codd
Explanation:
The relational database is basically based on the relational model of the data which is proposed by the Dr Edger F. codd and he mainly introduced the twelve basics principle of the database designing in the database system. He also contributed various valuable principle in the computer science.
The twelve principle are:
The first rule of the relational database is the information rule as it represented all data or informationIndependence of the integrityViewing various updating ruleLogically treatment of various NULL valueIndependence of the physical databaseDistribution in-dependencyVarious delete, insert and update rulesThe overall logical description of the database are basically stored in the database directoryThere is no subversion ruleThere is guarantee accessing ruleProper rule for data language The relational database level actionsWhat is an operating system? What are the main functions of a modern general purpose operating system?
Answer:
An operating system is a software that allows a user to run other applications on a computing device. The applications generally are not designed to interface directly with hardware, almost all of the applications are written to run on an operating system, in order to become independent of the hardware design.
The main function of an operating system are:
manage the hardware resources of a computer: central processing unit, memory, disk drives, and printers. establish a user interface to facilitate the interaction human-computer. execute and provide services for software applications.In a typical configuration the total RAM capacity is less than total ROM capacity.
True
False
False
Explanation:The difference between RAM and RAM is as follows
(1) RAM (random access memory) is meant for temporary storage whereas ROM (read-only memory) is meant for permanent storage.
(2) RAM chip is volatile, means once the power is turned off, it loses the previously holding information, where as ROM is non-volatile it doesn't losses any information even though power is turned off.
(3) RAM chip is used in the normal operations of the computer, whereas the ROM chip is used mainly for the startup process of computer.
(4) Generally, A RAM can store several gigabytes (GB) of data that is up to 16 GB whereas a ROM chip can typically store that much data. It only stores several megabytes (MB) of data that is up to 4 MB.
hence, the given statement about RAM is false.
In MIPS architecture, the Program Counter is:
A register that stores the next instruction to be executed
A register that stores the address of the next instruction to be executed
A binary counter that counts how many instructions have been executed
A control circuit that steps through a sequence of instructions
A register that stores the current location in memory to read and write from
Answer: A register that stores the address of the next instruction to be executed
Explanation: Program counter is register of the CPU(central processing unit) .It contains the memory address of the instruction that is to be executed in next turn after the present instruction is executed.This is also known as the instruction pointer .The cycle followed by the counter is fetch ,decode and execute.
Other options are incorrect because it does not store next instruction,does not count number of instruction or stores the memory for reading and writing.It also does not act as a control circuit.
An oral defamatory statement is ____.
Abuse
Slang
Slander
Defamation
Answer: Slander
Explanation: Slander is the orally spoken statement that has the defamatory meaning.The meaning of the defamatory statement is having the negative, false, hatred, ridicule etc feeling in the hidden form.This statement shows the false intention.
Slander is marked as the untrue defamatory statement .Other options are incorrect because abuse is statement containing abusive language, slang contains the informal language and defamation is the false claim .Thus the correct answer is slander.
A sequential file stored on a(n) ____________ can be updated in place.
(Points : 2) direct access storage device
paper tape
punch card file
line printer
Answer: Direct access storage device
Explanation:
The sequential file is the simple method for organization of different types of files. The files and records are basically stored in the direct access storage device in the sequentially manner so that we can directly access the particular file according to the requirement.
The direct access storage device basically allow the any file and elements to access directly from the given storage device and address. It is less time consuming method so that it increase the overall efficiency of the system.
On the other hand, all the other options are not associated for storing the sequential file. Therefore, Direct access storage device is the correct option.
The parameters needed for a MySQL database connect string are
a
host name
b
user name
c
password
d
All of the above
Answer:
d. All of the above.
Explanation:
The parameters required to for a MYSQL database connect string are as following:-
Host Name.User Name.Password.New link.Client flags.So among the given options all of them are required and those are host name,user name,password.
Hence the answer to this question is option d all of the above.
To edit a form, use
datasheet view.
design view.
layout view.
layout view or design view.
Answer: Design view
Explanation:
We use design view for editing and modifying the forms. The design view is basically used to create the form and then also edit the form structure. It is also capable for reducing the scope in the particular structure.
In the design view, we can use the property sheet for modifying the properties in the form and also control its features in the particular section of the form structure.
It basically provide the wide variety of comprehensive form structure and it basically helped to organize the proper information in the form.
Answer: layout view
Explanation; on edge
A use case model describes what a system does without describing how the system does it. (Points : 1.5) True
False
Answer:
The correct answer is true.
Explanation:
By definition, a use case is a list of events that defines the interactions between an actor and a system to achieve a goal. Generally, Use cases are used by functional analysts at a higher level to represent requirements, missions or stakeholder goals.
Does Kennesaw State University have any computing ethical policy for computer usage? If so - what is it?
Answer:
The answer to the questions: Does Kennesaw State University have any computing ethical policy for computer usage? If so - what is it? Would be as follows:
1. Yes, Kennesaw State University, a university in Georgia, does have a computing ethical policy that regulates the proper use of the facilities and computing services within the facilities of the university and the use of computing equipment that belongs to the university. This policy is known as the KSU Computer Usage Policy.
2. As said before this policy establishes that the use of computing services are not the right of a person, but rather a privilege afforded to the students, faculty and other people who are present in the university and who may need to use its computing services. The use of the computing services would be whitin this policy as long as it stays inside the delimitations established by federal, state and University policies.
Explanation:
What is the Java source filename extension? What is the Java bytecode filename extension?
Answer:
The extension of java source filename is .java and the extension of bytecode filename is .class
Explanation:
The java program is saved with the classname along with .java extension. The .java extension indicated that the particular file in java file.
Suppose we have a program
public class Main1
{
public static void main(String[] args) {
System.out.println("Hello:");
}
}
This program is saved as :Main1.java
To compile this program in command prompt we use javac Main1.java.
On compiling the java program it will be converted into byte code which has extension .class filename extension. So on compile, this program will be converted into Main1.class
Please discuss the differences between the array implementation and the linked list implementation of queues. List the advantages and disadvantages of each implementation.
Answer:
Arrays and linked list are data structures used to store data but it has some advantages and disadvantages.It Is important keep in mind thath both of them are completely usefull in it own case
Explanation:
Advantages:
Linked list: It doesn't have a size limitationIt is easy insert new elementsit doesn't have memory limitationArray:It is possible access random elementsThe memory requirements are less than linked listDisadvantages:
Linked list:It is not possible access random element in the listit Require more memory to store the pointer to the next elementArray:It is expensive insert new elementsit is fixed sizeit needs continuos memory (memory limitation)What is ‘verification’?
Answer: Verification in the terms of the computer field is defined as the process which is for testing of the consistency and the accuracy of the information, algorithm, data, etc. Verification is carried out by the approval or disapproval method after the checking process.
This techniques helps in verifying whether the function,algorithm ,data that has been accessed in the system is complete and precise or not so that it can properly function in the operating system.
Is spread spectrum transmission done for security reasons in commercial WLANs?
Answer: No
Explanation: Spread spectrum transmission is the wireless transmission technique for the wide channel that helps in decrement of the potential interference.The transmission of signal is based on the varying the frequency knowingly to achieve larger bandwidth.
The use of spread spectrum transmission in the WLAN(wireless local area network)is used for the regulatory purpose The regulation is the controlling of the area through policies.Thus,security is not the service that is provided to WLAN by spread spectrum transmission.
Time and weather Write a program to take as input and 4-digit number from the user. The first two digits represent the day of the month and the last two digits represent the month of the year. The program should then display the following: "It's winter" if the month entered is 12, 1 or2 . "It's Spring" if the month entered is 3, 4, or 5 "It's Summer", if the month entered is 6,7, or 8 "It's Fall", if the month entered is 9, 10, or 11 The program should also display the current week number of the month
Answer:
#here is program in python
#read 4 digit number
date=int(input("enter the date:"))
#first 2 digit is day
day=int(date/100)
#last 2 digit is month
month=date%100
#find the week of the month
if day<=7:
week=1
elif day>=8 and day<=14:
week=2
elif day>=15 and day<=21:
week=3
elif day>=22 and day<=28:
week=4
elif day>=29:
week=5
#check for Winter
if month in [12,1,2]:
print("week {} of Winter.".format(week))
# check for Spring
elif month in [3,4,5]:
print("week {} of Spring.".format(week))
#check for Summer
elif month in [6,7,8]:
print("week {} of Summer.".format(week))
#check for Fall
elif month in [9,10,11]:
print("week {} of Fall.".format(week))
Explanation:
Read a 4 digit number from user.first 2 digits represents the day and last 2 month.Then find the week of the month.If the month is in [12,1,2] then it will print "Winter" and week of that month.If month is in [3,4,5] then print "Summer" with week.If the month is in [6,7,8] then "Summer" and if the month is in [9,10,11] then "Fall".
Output:
enter the date:1212
week 2 of Winter.
. Use one command to create a /sales directory with the permissions of 770
Answer:
mkdir -m 770 sales
Explanation:
The command mkdir is used to create a directory and the attribute or flag
-m is used to assign permissions on create a folder.
Example:
mkdir -m 770 sales
Create a folder with permissions 770 with name sales
Write a C++ program that will convert distance measurements from miles to kilometers. Specifically, the program needs to convert 0, 10, 20, 30, 40 , 50, 60, 70, 80, and 90 miles to kilograms displaying both the number of miles and the number of kilograms on the same line.
Answer:
// here is code in C++.
#include <bits/stdc++.h>
using namespace std;
// main function
int main()
{
// loop that will convert 0,10,20.....90 miles to kilometer
for(int a=0;a<=90;a=a+10)
{
// convert miles to kilometer
double kilo_m=a*1.609;
// print the result
cout<<a<<" miles is equal to "<<kilo_m<<" kilometer."<<endl;
}
return 0;
}
Explanation:
Run a for loop from 0 to 90.First change 0 miles to kilograms by multiply 1.609. Then Increment "a" by 10 until it "a" is less or equal to 90.And change them into kilometer.
Output:
0 miles is equal to 0 kilometer.
10 miles is equal to 16.09 kilometer.
20 miles is equal to 32.18 kilometer.
30 miles is equal to 48.27 kilometer.
40 miles is equal to 64.36 kilometer.
50 miles is equal to 80.45 kilometer.
60 miles is equal to 96.54 kilometer.
70 miles is equal to 112.63 kilometer.
80 miles is equal to 128.72 kilometer.
90 miles is equal to 144.81 kilometer.
Writе thе dеclaration of a doublе pointеr namеd avеragе
Answer:
double *average; // declaration of a doublе pointеr .
Explanation:
A pointer is a variable that will store the address of another variable of the same datatype. Here average is a pointer type variable that means it will store the address of double datatype variable.
syntax of declaring double datatype variable
double *variable_name ;
double *average;
For example:
double *average;
//declaration of a doublе pointеr
double r=90.897;
// variable r of double datatype
average=&r;// storing the address of r
The default behavior for Connector/Python is to use __________ results.
a
buffered
b
unbuffered
c
uninitialized
d
list-based
Answer: (C) Uninitialized
Explanation:
The default behavior is basically used as the uninitialized result for the connector and python. As a matter of course, MySQL Connector/Python doesn't cradle or pre-fetch results. This implies after a question is executed, your program is in charge of bringing the information.
This stays away from unnecessary memory use when inquiries return huge outcome sets. On the off chance that you realize that the outcome set is little enough to deal with at the same time, you can get the outcomes promptly by setting supported as "TRUE".
. What is an APT? What are some practical strategies to protect yourself from an APT?
Answer and Explanation:
Advanced Persistent Threat abbreviated as APT is a type of cyber attack which gives access to the unauthorized user to enter the network without being detected for a long period.
APTs are generally sponsored by the government agencies of the nation or large firms. For example, one of the ATPs used was Stuxnet in the year 2010 against Iran, in order to put off the nuclear program of Iran.
Some of the practical strategies for protection against APT are:
Sound Internal AuditingStrong Password Accessing PoliciesStringent policies for accessing any deviceIntroduction and implementation of multi factor authenticationStrong IDs and sound honeypot solutionsFrom an IT perspective, which of the following best describes BI and BI apps?
a. Stand-alone
b. Support a specific objective
c. A collection of ISs and technologies
d. Web-based systems designed for for-profits
Answer:a)Stand-alone
Explanation: Stand-alone application is the application that is found on the system of every client.In accordance with the IT section, Business intelligence can be transferred into stand-alone application .This helps in the development of the essence of the system at an independent level.
Other options are incorrect because supporting a certain factor will not make it independent, cannot act as the group of ISs technology or web system for gaining profit.Thus,the correct option is option(a).
How many bytes are there in 256 Kbytes?
Answer:
256000 bytes.
Explanation:
One Kilo byte(KB) consists of 1000 bytes.So the number of bytes in 256 kilo bytes is :-
1 kilobyte = 1000 bytes.
256 kilo bytes = 256 x 1000 bytes.
256 kilo bytes = 256000 bytes.
Also 1 bytes consists of 8 bits.
1 kb = 1000 bytes.
1GB Giga byte = 1024 kilo bytes.
1 TB Tera Byte = 1024 Giga Bytes (GB).
Hence the answer to this question is 256,000 bytes.
Write a program that prompts the user to enter the month and year and displays the number of days in the month. For example, if the user entered month 2 and year 2000, the program should display that February 2000 has 29 days. If the user entered month 3 and year 2005, the program should display that March 2005 has 31 days.Here is a sample run of this program:Enter a month in the year (e.g., 1 for Jan): 1Enter a year: 2009January 2009 has 31 daysExercise 3.11Liang, Y. Daniel. Introduction to Java Programming (8th Edition)
Answer:
Following are the program in JAVA language
import java.util.Scanner; // import package
import java.util.Calendar; // import package
public class Main // class main
{
public static void main(String[] args) // main function
{
Scanner input = new Scanner(System.in); // for user input
Calendar calendar = Calendar.getInstance(); //get calendar instance for methods
int nYear , nMonth , date =1 , nDays;
String MonthOfName = "";
System.out.print(" Enter a month in the year :");
nMonth = input.nextInt(); //input Month
System.out.print("Enter a year :");
nYear = input.nextInt(); //Input Year
switch (nMonth) //Find month name via 1-12
{
case 1:
MonthOfName = "January";
nMonth = Calendar.JANUARY;
break;
case 2:
MonthOfName = "February";
nMonth = Calendar.FEBRUARY;
break;
case 3:
MonthOfName = "March";
nMonth = Calendar.MARCH;
break;
case 4:
MonthOfName = "April";
nMonth = Calendar.APRIL;
break;
case 5:
MonthOfName = "May";
nMonth = Calendar.MAY;
break;
case 6:
MonthOfName = "June";
nMonth = Calendar.JUNE;
break;
case 7:
MonthOfName = "July";
nMonth = Calendar.JULY;
break;
case 8:
MonthOfName = "August";
nMonth = Calendar.AUGUST;
break;
case 9:
MonthOfName = "September";
nMonth = Calendar.SEPTEMBER;
break;
case 10:
MonthOfName = "October";
nMonth = Calendar.OCTOBER;
break;
case 11:
MonthOfName = "November";
nMonth = Calendar.NOVEMBER;
break;
case 12:
MonthOfName = "December";
nMonth =Calendar. DECEMBER;
}
calendar.set(nYear, nMonth, date); // set date to calender to get days in month
nDays=calendar.getActualMaximum(Calendar.DAY_OF_MONTH); // get no of days in month
System.out.println(MonthOfName + " " + nYear + " has " + nDays + " days."); //print output
}
}
Output:
Enter a month in the year : : 09
Enter a year : 2019
September 2019 has 30 days.
Explanation:
In this program we have take two user input one for the month and other for the year Also take two variables which are used for storing the month name and no of days in a month. with the help of switch we match the cases and store the month value .After that set the date to calender with help of calendar.set(nYear, nMonth, date) method and To get the number of days from a month we use calendar.getActualMaximum(Calendar.DAY_OF_MONTH); method and finally print year and days.
What does it mean to 'instantiate' an object?
Explanation:
Instantiate an object means creating an instance of accessing the property of a class we can create instance or object for that class. The property of class means method and variable with the help of instance we can directly access the method and variable.
For example
class abc // class abc
{
public:
void sum1() // function definition
{
cout<<" hello "; // display hello
}
};
void main() // main method
{
abc ob; // creating an instance
ob.sum1(); // calling a function sum1
}
Output:
hello
Here we create a instance of class abc i.e ob which can access the method sum1().
What is TCP/IP's Transport layer's primary duty?
Answer:
The TCP/IP is the transmission control protocol and internet protocol and in the TCP/IP model the transport layer is the second layer.
The primary responsibility of this layer is that it is basically used to deliver messages to the host and that is why it is known as end to end layer.
It basically provide the point to point connection between the destination to server host for delivering the various types of the services efficiently and reliably.
In the TCP/IP model the transport layer are basically responsible for transferring the data or service error free between the server to destination host.
Many business databases consist of multiple tables with ____ among them.
Relationships
Arrows
Objects
Constraints
Answer: Relationship
Explanation:
Many organization and business consist multiple tables with the relationship when the multiple data in the table are basically associate with the multiple data in the another table.
When we create a database, then foe each entities we use separate table for every particular entities. The relationship between the multiple table is basically used to represent multiple data in the database.
There are basically different type of the relationship in the database that are:
One to one relationshipOne to many relationshipMany to many relationship
Write a function called reverse() with this prototype:
void reverse(char dest[], char source[], int size);
Your function should copy all the elementsin the array source into the array dest, except in reverse order. The number of elements in the source array is give in the parameter size. Use a for loop to do the copying. Assume that dest is large enough to hold all of the elements. Please be thorough with commenting.
Answer:
void reverse(char dest[], char source[], int size)
{
for(int i=0;i<size;i++)//using for loop.
{
dest[i]=source[i];//assigning each element of source array to dest array.
}
int s=0,e=size-1;//initializing two elements s with 0 and e with size -1.
while(s<e){
char t=des[s]; //SWAPPING
dest[s]=dest[e]; //SWAPPING
dest[e]=t; //SWAPPING
s++;
e--;
}
}
Explanation:
I have used while loop to reverse the array.I have initialize two integer variables s and e with 0 and size-1.Looping until s becomes greater than e.
It will work as follows:
first s=0 and e=0.
dest[0] will be swapped with dest[size-1]
then s=1 and e=size-2.
then des[1] will be swapped with dest[size-2]
and it will keep on going till s is less than e.
While the concept of ____ has well served scientists who share scientific text files and application developers who exchange code, the greater use has been in downloading artistic files, such as music and video files.
VPNs
LANs
point-to-point file protocol
peer-to-peer (P2P) file sharing
Answer: peer-to-peer (P2P) file sharing
Explanation: Peer-to-peer file sharing is the technique in which networking technology is used for the sharing and distribution of the files digitally. The sharing of the files are in the form of movies, games music etc.
Peer are considered as the nodes which are the end-user so, the end-user to end-user file transfer is done through this technology.
Other options are incorrect because VPN(virtual private network) is the connection between network and client over less secure network,LAN (Local area network) is the network that can be established for single infrastructure to connect and point to point protocol is protocol for the routers for communication.Thus the correct option is P2P file sharing.
"What does the list look like after this code executes?
colors = "red,orange,yellow,green,blue"
s = colors.split(",")
["red", "orange", ""yellow", "green", "blue"]
["red orange yellow green blue"]
[red,orange,yellow,green,blue]
red
Answer:
The list created by the split method in Python 3 will be ["red", "orange", ""yellow", "green", "blue"]
Explanation:
In Python 3, the split method takes the input string, in this case is colors = "red,orange,yellow,green,blue", and split it into a list and you can indicate the separator that the method will use.
The general syntax for this method is:
string.split(separator,max)
separator indicates the character that will be used as a delimiter of each list member and the max parameter indicates the maximum number of separations to make.
Since each color in your string is separated by the character "," the code will make a list in which every color is a separated string.
Business competition is no longer limited to a particular country or even a region of the world.
True
False
Answer:
The best answer to the question: Business competition is no longer limited to a particular country or even a region of the world:___, would be: True.
Explanation:
Globalization has changed the way that all aspects of human life, and human activities develop. Globalization has meant the erasing of limitations that were placed primarily on trade and economic activities, but it also extended to other aspects of life. Because of technology advancements, especially in communications, connectivity, and travelling, the world is now easily connected and limitations are only placed up to a certain level. Thus, and especially economically, business competition has become a global issue too, with now more and more presence of multinational businesses, companies that extend not necessarily to one country, or even one region of the world, but extend to any region that will allow them to enter for business exchanges.
. Within data mining, what it it’s robustness?
Answer:
Data mining is the extraction/mining of the required/ actual data from the raw data .Rest of the data that is not required is eliminated in this process.It is used in the many field such as research, scientific, etc.
Robustness in the data mining field is for defining the strong nature of the data .This feature is responsible for stability of the data even at the occurrence of the error.The resistance shown by the data towards the problem makes the data robust .