Section A $(20$ Marks$)$ Write down the Letter corresponding to the correct answer. $1.$ Which of the following statement is correct about fragmentation?It is part of the software.It is software that connects the OS$.$Slows down the computerd. All of the these$2.$ The PCB is identified byReal$-$NumberBinary NumberStore blockInteger Process IDkuling is the basis ofmaltprogramming sporadisREPCAM $18$LIG OFblarger memory sized systemsc$)$ multiprocessor Bystems d$)$ none of the mentioned$4.$ The portion of the process scheduler in an operating system that dispatches processes is concerned witha$)$ assigning ready processes to waiting queue b$)$ assigning running processes to blocked queue$)$assigning ready processes to CPUd$)$ all of the mentioned$5.$ The FCFS algorithm is particularly troublesome fora$)$ operating systemsb$)$ multiprocessor systems$)$ time sharing systemsd$)$ multiprogramming systems$6.$ For an effective operating system, when to check for deadlock? a$)$ every time a resource request is made at fixed time intervalsb$)$ at fixed time intervalse$)$ every time a resource request is maded$)$ none of the mentioned$7.$ A deadlock avoidance algorithm dynamically examines the condition can never exist. to ensure that a circular waita$)$ operating systemb$)$ resourcesc$)$ system storage stateresource allocation state