True/False 21. The I/O modules take care of data movement between main memory an

Question

True/False
21. The I/O modules take care of data movement between main memory and a particular device interface.
Multiple Choices Static
22. A simpler and more elegant approach is memory-mapped I/O because I/O devices and main memory share the ____________________.
A. same memory space       B. same address space
C. same register           D. same interface
23. Electrical signal loss over time or distance during data transfer is called an _______________.
A. attention       B. attribute       C. attenuation       D. attendention
24. The extra line used for synchronization in parallel data transmission is called a ______________.
A. throbe       B. strobe       C. channel       D. stroke
True/False
25. Solid-state drives consist of a microcontroller and flash memory.
Multiple Choices Static
26. ________________ is a technique that distributes data and erase/write cycles evenly over the entire disk to extend the life of the disk.
A. Wear labelling       B. Wear levelling   C. Wear tearing    D. Wear sequencing
27. DVDs rotate at about ______________ times the speed of CDs.
A. two           B. Three       C. four       D. five
28. Ultra Density Optical disks can store up to _________ and _____________ respectively.
A. 23GB and 60GB       B. 23GB and 64GB       C. 20GB and 60GB
D. 24GB and 60GB
29. Systems that require high availability and must be able to tolerate more than one concurrent drive failure use________________.
A. RAID 1       B. RAID 2       C. RAID 3        D. RAID 6
True/False
30. Large systems are also limited to using only one type of RAID.
Multiple Choices Static
31. ______________ devices offer another approach to transcend the limits of magnetic storage.
A. Micro-electronic-mechanical            B. Micro-electro-magnetic
C. Micro-electro-mechanical            D. Macro-electro-mechanical
32. Holographic data storage stores enormous data density by using _________________.
A. one-dimensional medium               B. two-dimensional medium
C. three-dimensional medium           D. n-dimensional medium
33. MTTR means
A. Mean Time To Repeat       B. Mean Time To Repair
C. Mean Time To Report       D. Median Time To Repair
True/False
34. The disadvantage of RAID-1 is that it is costly and requires large memory space.
35. Like RAID-6, RAID DP can tolerate the simultaneous loss of two disk drives without loss of data.
Multiple Choices Static
36. _________________ law states the interrelationship of all components with the overall efficiency of a computer system with a simple formula.
A. Amdahl

Explanation / Answer

21.

The statement “The I/O modules take care of data movement between main memory and a particular device interface.” is true.

I/O module is one of the important component of computer architecture.

I/O module moves data between memory and external I/O devices

22.

A portion of physical memory is assigned to I/O devices. CPU accesses the I/O devices through these memory addresses.

Thus, the correct option is (B) Same address space.

23.

Any signal losses its energy, when it travels over the long distances. This general phenomenon is called attenuation.

Thus, the correct option is (C) attenuation.

24.

The correct option is (B) strobe.

25.

The statement “Solid-state drives consist of a microcontroller and flash memory” is true.

Solid state drivers are faster than traditional drives, because solid state drivers uses flash memory and microcontrollers.

26.

The correct option is (B) Wear levelling.

27.

The correct option is (B) three .

28.

The correct option is (C) 20GB and 60GB.

29.

The correct option is (D) RAID 6.

30.

The statement “Large systems are also limited to using only one type of RAID” is true.

31.

The correct option is (C) Micro-electro-mechanical.

32.

The correct option is (C) three-dimensional medium.

33.

The correct option is (B) Mean Time To Repair.

34.

The statement “The disadvantage of RAID-1 is that it is costly and requires large memory space” is true.

RAID 1 Maintains mirror image, i.e. Another copy of data in another disk, for that it maintains large memory space.

35.

The statement “Like RAID-6, RAID DP can tolerate the simultaneous loss of two disk drives without loss of data” is true.

Because RAID -6 maintains two independent parity functions to safe the data in a disk.

36.

The correct option is (A) Amdahl’s.

37.

The correct option is (B) sequential.

38.

The statement “I/O channels are driven by small CPUs called I/O processors (IOPs)” is true.

I/o processors take care of i/o operations without interference of CPU.

39.

The correct option is (A) timing diagrams.

40.

The statement “I/O channels are driven by small CPUs called I/O processors (IOPs)” is false.

Actually that process is called interleaving not interpathing.

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