All Categories
Computer Science
Explore questions in the Computer Science category that you can ask Spark.E!
- The major operating system services provide mechanisms for secure and efficient are: *1/1Communication between processesAll of the other choicesExecution of a program, I/O operations performed by it, and detecting and reporting errors caused by itFile manipulation
- The ways that input/output can be done is? *DMA (Direct Memory Access)All of the other choicesBusy waitingInterrupt
- Information that must be saved prior to the processor transferring control to the interrupt handler routine includes: *0/1PSWNone of the other choicesPSW and Contents of processor registersPSW and PC
- The main characteristics of layered system does not include: *A. Upper layer can only call functions of closely lower layer B. Each layer has well defined functionsC. Each layer runs independentlyD. Many layers
- Which of the following statements about the CPU's handling interrupts is incorrect? *None of the other choicesThe CPU branches to a new instruction sequenceThe hardware saves the old PC locationThe processor ceases to execute the current sequence of instructions
- Which of special register contains the Mode Bit (user or kernel)? *1/1Program Counter (PC)None of the other choicesProgram Status Word (PSW)Instruction Register (IR)
- Which is not an example of a resource that is commonly time-multiplexed? *1/1CPUGraphics acceleratorMain memoryNetwork interface
- List of memory location, that contains the executable program, the program's data, and its stack is called: *0/1set of resourcesall of the other choices address memoryaddress space
- ____ is the partitioning of a single server, each of which can support a different operating *MultiprocessingMultithreadingShared processingVirtualization
- Consider a computer system that has cache memory, main memory (RAM) and disk, and OS uses virtual memory. It takes 2 nsec to access a word from the cache, 10 nsec to access a word from RAM, and 10 msec to access a word from the disk. If the cache hit rate is 95% and main memory hit rate is 99%, what is average time to access a word? *1/15,000.495 nsec5,001.9 nsec2.395 nsec5,002.395 nsec
- In CRC, if the generator is x^4+x+1, then which one is added in to the frame before dividing A. 1 1 1 1 1B. 0 0 0 0C. 1 1 1 1D. 0 0 0 0 0
- Which of the following is not a step in the boot process? *1/1The BIOS is activated by powering on the CPUConfiguration and customization settings are checkedThe antivirus program checks all files for viruses The operating system is loaded into RAM
- As one proceeds down the memory hierarchy (from inboard memory to offline storage), which of the following conditions is correct? *1/1Decreasing capacityNone of the other choicesIncreasing cost per bitIncreasing access time
- A three-character data frame: A FLAG B when framing methods using byte stuffing. the output will beA. A FLAG FLAG BB. AB FLAG FLAGC. A ESC FLAG BD. AB ESC FLAG
- A CPU may have multiple execution units, so that can carry out multiple instructions in the same time is called: *0/1None of the other choicesMulticore PipelineSuperscalar
- Booting a general purpose computer involves the following steps except *a. Loading the OSb. Loading the command interpreter c. Loading one or more bootstrap loadersd. Execution of a ROM-based POST sequence
- This command identifies the sender of the message.A. RCPT TOB. HELOC. MAIL FROMD. none of them
- Which part of the mail created by the UA(User Agent) contains the sender and receiver names?A. envelope B. addressC. headerD. none of theme
- What is the service that the UDP protocol provides ?A. Error detection B. Flow controlC. None is correctD. Guaranteed delivery
- What does that mean by Carrier Sense in CSMA/CD (Carrier Sense Multiple Access/Collision Detection)?A. The station listens for the carrier signal before any transmissionB. The station waits for carrier signal arrive before any transmissionC. None of them D. Both of them