Ali is creating a document on a system using his login credentials. His colleague needs to use his system to access documents. His colleague does so with his own credentials while Ali is still logged in. What type of OS allows this kind of operation?

A.
single-user/single-tasking
B.
single-user/multitasking
C.
multiuser/single-tasking
D.
multiuser/multitasking

What is force? what are the types of force ? explain all with suitable examples

Write the quartstogallons java class that declares a named constant to hold the number of quarts in a gallon (4). also declare a variable to represent the number of quarts needed for a painting job, and assign an appropriate value—for example, 18. compute and display the number of gallons and quarts needed for the job. display explanatory text with the values, for example:

In deadlock avoidance using banker’s algorithm, what would be the consequence(s) of: (i) a process declaring its maximum need as maximum possible for each resource. in other words, if a resource a has 5 instances, then each process declares its maximum need as 5. (ii) a process declaring its minimum needs as maximum needs. for example, a process may need 2-5 instances of resource a. but it declares its maximum need as 2.