Computer Science Questions
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A user needs to send the server some information. The request line method is ______A. PATCHB. none of themC. POSTD. OPTION
Maixmum number of data flow through in N-port switchA. N-1 B. N/4C. N/2 D. N
Which protocal is better for real-time video application over the Internet in term of minimizing the delay?A UDPB TCPC ARPD ICMP
________ audio/video refers to the broadcasting of radio and TV programs through the internetA. InteractiveB. Streaming storedC. none is correctD. Streaming live
A datagram is fragmented into three smaller datagrams. Which of the following is true?A. none is correct B. The more fragment bit is set to 0 for all three datagrams C. The identification field is the same for all three datagrams D. The do not fragment bit is set to 1 for all three datagrams
Which thread does the arrival of a message cause the system to create a new thread to handle the message? *0/1Distributed Pop-upActivatorUpcall
A memory free in 3 frames. Which values do the page frame contain after the 4th page is accessed? Assume that the running as the following page 7, 0 , 1, 2 , 0, 3, 0 , 4, 2 , 3 , 0 , 3 , 2 , 1, 2, 0, 1, 0 , 7 using LRU. *1/17, 0, 14, 0, 3 3, 0, 41, 0, 7
Which mechanism is described as "the device controller sneaks in and steals an occasional bus cycle from the CPU once in a while, delaying it slightly"? *1/1Cycle stealing All of the othersInterrupt stealingCycle sneaking
The Joliet Extensions provide ________ *1/1Long file name is supported Unicode characterDirectory names with extensionsDirectory nesting deeper than 8 levelsAll of the others
Which of the following information contain in the entry of the partition tables ? *A.Marking a partittion as activeB.Starting and ending address of each partition and Marking a partittion as activeC.Starting and ending address of each partitionD.None of the other choices
A entry of the Process table is called: *A.Process check blockB.All of the other choicesC.Process control blockD.Process management block
A computer with a 32-bit address uses a two-level page table. Virtual addresses are split into a 9-bit top-level page table field, an 11-bit second-level page table field, and an offset. How many pages are there in the address space? *A.2^22 pagesB.2^21 pagesC.2^23 pagesD.2^20 pages
An example of preemptable resources is *A.CD-ROM deviceB.DVD deviceC.None of the other choicesD.Memory
Typical approaches to handle deadlocks do not include *A.DetectionB.PreventionC.DeterrenceD.Avoidance
The first and simplest recovery method, and the most drastic, is to ____. *A.Terminate only the jobs involved in the deadlock and ask their users to resubmit themB.Iidentify which jobs are involved in the deadlock and terminate them one at a time, checking to see if the deadlock is eliminated after each removalC.Terminate every job that's active in the system and restart them from the beginningD.Select a nondeadlocked job, preempt the resources it's holding, and allocate them to a Deadlocked process so it can resume execution, thus breaking the deadlock
Which of the following is correct about symbolic links? *A.Symbolic links need not space to store the name and the file pointed toB.Symbolic links can point to files in the networkC.Symbolic links can only point to files on the same machinesD.None of the other choices
Which of the following statements about semaphores is true? *A.A semaphore implementation should guarantee that processes do not suffer indefinite postponement.B.P and V (Down and Up) operations should be indivisible operationsC.If several processes attempt a P(S) operation simultaneously, only one process should be allowed to proceed.D.All of the other choices
Which of the following is appropriate to release page table and pages? *A.Process termination timeB.Process executionC.Page fault timeD.Process creation
Which of the following statements is incorrect? *A.None of the other choicesB.A hard drive is an example of a I/O character deviceC.In the interrupt-driven I/O technique, the processor issues an I/O request, continues with other work and eventually receives notification that the request was fulfilledD.The term data rate refers to the speed with which data moves to and from the individual I/O device
Suppose a virtual address space of 2^28 words and the page size is 2^12 words. If the virtual address is 1234567 in Hexadecimal, what would be the page number in Hexadecimal? *A.1234B.12345C.123456D.123