The storage capacity of a standard 3.5-inch floppy disk is
- A.720 KB
- B.1.44 MB
- C.2.88 MB
- D.10 MB
Correct answer
Explanation
The correct answer is B, 1.44 MB. The 3.5-inch high-density floppy disk, the square plastic diskette with a metal shutter, was formatted to 1.44 MB, and that figure is still asked in computer awareness papers because it anchors the small end of the capacity ladder.
Option A, 720 KB, was the capacity of the earlier double-density 3.5-inch disk, a real figure but not the standard one, and it is the distractor most often chosen. Option C, 2.88 MB, belonged to an extra-high-density format that never came into common use. Option D, 10 MB, was the size of early hard disks, not of any floppy. Keep the set in order and no version of this question can trouble you: 1.44 MB for the floppy, 700 MB for the CD, 4.7 GB for the single-layer DVD and 25 GB for a Blu-ray layer.
Read the full article: Memory and Storage: RAM, ROM, Cache and Units
Practice Questions
View allWhich of the following is the fastest memory in a computer system?
- A.Cache memory
- B.Register
- C.Main memory
- D.Hard disk
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A register is built into the CPU itself and holds the word the arithmetic and logic unit is operating on at that instant, so it is read and written in a single clock cycle.
Read the full explanation →How many bits make one nibble?
- A.2 bits
- B.4 bits
- C.8 bits
- D.16 bits
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A nibble is half a byte, that is four binary digits, and it matters because one nibble is written as exactly one hexadecimal digit, from 0 to F. That is why memory addresses in hexadecimal are read four bits at a time.
Read the full explanation →Which type of memory has to be refreshed thousands of times per second to retain its contents?
- A.SRAM
- B.DRAM
- C.ROM
- D.Flash memory
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Dynamic RAM stores each bit as a charge on a very small capacitor, and that charge leaks away in a few milliseconds, so the memory controller has to read and rewrite every cell continuously.
Read the full explanation →The contents of an EPROM chip are erased by exposing it to
- A.An electrical signal
- B.Ultraviolet light
- C.A magnetic field
- D.Infrared radiation
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An Erasable Programmable Read Only Memory chip carries a small quartz window over the silicon; ultraviolet light shone through that window releases the trapped charge from every cell at once and returns the chip to its blank state, after which it can be programmed again.
Read the full explanation →One terabyte is equal to how many gigabytes?
- A.100 GB
- B.512 GB
- C.1,024 GB
- D.2,048 GB
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Every step in the ladder of storage units multiplies by 1,024, because 1,024 is 2 raised to the power 10 and memory is addressed in binary.
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