Unit 2: Computer Storage, Processing and I/O Devices - Practice Quiz

1 Which type of memory loses all its stored data when the computer is switched off?

2 What is the full form of ROM?

3 Which of the following is a type of volatile memory?

4 Cache memory is mainly used to:

5 How many bits make up one byte?

6 Which of the following memory units is the largest?

7 Approximately how many kilobytes are there in one megabyte?

8 The smallest unit of data in a computer is the:

9 What does HDD stand for?

10 Which storage device is small, portable, and connects to a computer through a USB port?

11 A traditional hard disk drive stores data using:

12 Secondary storage is used to:

13 What does DVD stand for?

14 Which technology is used to read and write data on a DVD?

15 What is the full form of SSD?

16 Compared to a traditional HDD, an SSD is generally:

17 Which of the following is an input device?

18 A scanner is used to:

19 What does LCD stand for?

20 Which of the following is an example of a modern touch-based input device?

21 A file is exactly in size. Using the binary definition where , how many megabytes does the file occupy?

22 How many bits are needed to represent a single character stored using standard 8-bit encoding, and how many such characters fit in (assuming bytes)?

23 A program that is currently running is closed abruptly due to a power cut, and all unsaved work is lost. Which characteristic of the memory holding the running program explains this?

24 In the memory hierarchy, which of the following orderings correctly ranks the components from fastest access to slowest?

25 A small, extremely fast memory sits between the CPU and RAM to reduce average access time by holding frequently used data. What is this memory called?

26 A computer's firmware and boot instructions remain available every time the system starts, even after long periods without power. Which type of memory stores these instructions?

27 A hard disk drive stores data magnetically on spinning platters accessed by a moving read/write head. Which factor most directly increases the time to read a random piece of data?

28 A laptop is upgraded from an HDD to an SSD and boots noticeably faster. Which property of the SSD best explains this improvement?

29 Which technology is used to read and write data on a standard DVD?

30 A user needs to distribute a video file on a single optical disc without compression. Which medium is most suitable?

31 A USB flash drive retains files after being unplugged and carried around. Which pair of properties describes it?

32 A technician wants to compare an HDD and an SSD of the same capacity. Which statement is generally correct?

33 A device converts a printed photograph on paper into a digital image file. Which I/O device performs this task?

34 An architect needs to output large, precise engineering drawings on wide sheets using continuous line movements. Which device is best suited?

35 Classify the following correctly: keyboard, mouse, and LCD monitor.

36 A printer forms characters by spraying tiny droplets of liquid ink onto paper. Which type of printer is this?

37 An office needs high-volume, fast, sharp text printing at low cost per page. Which printer technology fits best?

38 A modern input method lets users control an application by speaking commands, which are converted to text and actions. Which technology enables this?

39 A tablet screen acts both as a display and accepts finger taps as input. This combined-function device is best described as which of the following?

40 A designer prints a physical three-dimensional prototype directly from a digital model. Which device is being used?

41 A file has a size of exactly bytes. If a network transfers data at a sustained rate of (where bytes), how long does the transfer take?

42 A system uses a cache that intercepts CPU requests before they reach main memory. If the cache hit rate is , cache access time is , and main memory access time is (accessed only on a miss, after the cache is checked), what is the effective average access time?

43 An HDD spins at . What is the average rotational latency, defined as the time for half a revolution?

44 Which characteristic of NAND flash forces SSDs to use a Flash Translation Layer (FTL) with wear leveling and garbage collection?

45 A single-layer, single-sided DVD holds about while a CD holds about . The primary physical reason a DVD stores more in the same disc size is:

46 A monochrome bitmap image is pixels using bit per pixel. What is its uncompressed size?

47 Which statement correctly distinguishes SRAM from DRAM?

48 In RAID 5 with disks each of , using distributed single parity, what is the usable capacity and how many disk failures can it tolerate without data loss?

49 A flatbed scanner is set to scanning an inch area in -bit color. Approximately how large is the raw uncompressed image?

50 Why is a plotter, rather than a standard inkjet printer, traditionally preferred for large-format engineering drawings (CAD)?

51 A memory address bus has lines and each addressable location holds byte. What is the maximum directly addressable memory?

52 A user runs a database with heavy random reads. Compared to a HDD, an SSD gives dramatically higher performance for this workload mainly because:

53 Order these from fastest access time to slowest: (1) L1 cache, (2) magnetic HDD, (3) main DRAM, (4) CPU register.

54 Two USB flash drives are rated USB 2.0 and USB 3.0 respectively. Copying a file, the theoretical bus ceilings are and . Ignoring overhead and assuming the drive can saturate the bus, the USB 3.0 transfer is faster by roughly a factor of:

55 An LCD monitor's native resolution is . Displaying a signal full-screen causes visible blurriness. The best explanation is:

56 An HDD has an average seek time of , rotational latency of , and a transfer rate of . What is the approximate total time to read a single block (assume )?

57 A modern VR headset combines head tracking, hand controllers, and dual high-refresh displays. From an I/O classification standpoint, the headset is best described as:

58 Uncompressed CD-quality audio is sampling, -bit samples, stereo ( channels). What is the data rate?

59 A phenomenon where an SSD must relocate valid pages and erase blocks before writing new data, causing actual flash writes to exceed host writes, is measured by:

60 Which classification is entirely correct?