Answer:
1. Hardware Maintenance
2. Uninterrupted Power Supply (UPS)
3. Antivirus software
Explanation:
Antivirus software, or Anti-virus software (also known as AV software), otherwise called anti malware, is a PC program used to forestall, distinguish, and eliminate malware.
Antivirus software was initially evolved to identify and eliminate PC infections, thus the name. Be that as it may, with the expansion of different sorts of malware, antivirus software began to give security from other PC dangers. Specifically, current antivirus software can shield clients from: noxious program criminals.
A few items additionally incorporate security from other PC dangers, for example, tainted and noxious URLs, spam, trick and phishing assaults, online identity (privacy), web based financial assaults, social engineering techniques, advanced persistent threat (APT).
Answer:
Implicit type casting means the type casting done by the compiler during compilation of program whereas Explicit type casting means the programmer explicitly type casts the variables. This is the difference implicit and explicit type casting.
Explanation:
Type casting means the conversion of one data type into another data type. There are two types of type casting. They are Implicit type casting and Explicit type casting.
<u>Implicit type casting:</u> The type casting which is done by the compiler during the compilation of a program. This occurs when we assigning smaller data type to larger data type and also both the data type are compatible. Below example clears the above concepts.
Ex: 
In the above example " i " is " int " data type whereas " l " is long data type but as we assigned the value of " i " to " l ". Here " int " and " long " are compatible data types and we assigned smaller data type ( int - i ) to larger data type ( long - l ) implicit type casting occurs.
<u>Explicit type casting:</u> The type casting which is done by the programmer explicitly to convert one data type into other data type. If we want to assign a value of larger data type to smaller data type explicit type casting is required. Below example clears the above concepts.
Ex: 
In the above example " d " is " double " data type whereas " l " is " long " data type. Here we are explicitly type casting to change larger data value ( double - d ) to smaller data value ( long - l ).
Answer:
A. OU
Explanation:
An organization unit (OU) is used to group objects that are related, having similar administrative and security requirements within a domain. It provides a way of classifying objects in a directory, such as differentiating between objects with the same name or managing and creating objects. An OU can be nested into another OU, thus it can be used to create a hierarchy within an organization.
Answer:
<em>C++</em>
///////////////////////////////////////////////////////////////////////////////////////////
#include <iostream>
using namespace std;
//////////////////////////////////////////////////////////////////
class QuadraticEquation {
int a, b, c;
public:
QuadraticEquation(int a, int b, int c) {
this->a = a;
this->b = b;
this->c = c;
}
////////////////////////////////////////
int getA() {
return a;
}
int getB() {
return b;
}
int getC() {
return c;
}
////////////////////////////////////////
// returns the discriminant, which is b2-4ac
int getDiscriminant() {
return (b*2)-(4*a*c);
}
int getRoot1() {
if (getDiscriminant() < 0)
return 0;
else {
// Please specify how to calculate the two roots.
return 1;
}
}
int getRoot2() {
if (getDiscriminant() < 0)
return 0;
else {
// Please specify how to calculate the two roots.
return -1;
}
}
};
//////////////////////////////////////////////////////////////////
int main() {
return 0;
}
Answer:
Option D
Explanation:
Complete question
A management information system is typically used by _____.
A. all levels of employees
B. company executives
C. upper-level managers
D. middle-level managers
Solution
A management information system is typically used by middle-level managers
Option D is the correct answer
Management information system (MIS) helps the middle managers to control the work across the various teams of organization.
