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Larger Units Of Storage (Kb, Mb, Gb, Tb, Pb, Eb, Zb, Yb)
1 Gigabyte is equal to ____?
1 Gigabyte (GB) is equal to 1024 Megabytes (MB) in the binary system commonly used in computer science. Therefore, option B is correct.
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Larger Units Of Storage (Kb, Mb, Gb, Tb, Pb, Eb, Zb, Yb)
One kilobyte (KB) is equal to how many bytes?
One kilobyte (KB) is defined as 1024 bytes in computer science, based on the binary system where 1 KB = 2^10 bytes. Therefore, option B (1024) is correct.
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Number Systems
The accuracy of the floating-point numbers representable in two 16-bit words of a computer is approximately ____.
Two 16-bit words typically represent a 32-bit floating-point number, which provides about 6 to 9 decimal digits of precision. The closest standard approximation is about 6 digits of accuracy, making option B correct.
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Character Encoding
How many bits does ASCII use?
ASCII originally uses 7 bits to represent characters, allowing for 128 unique symbols. However, it is often stored or transmitted using 8 bits, with the extra bit sometimes used for parity or extended characters, so both 7 or 8 bits are correct depending on context.
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Memory Basics
A bit can be ____: 1 and 0, 1 or 0, 1 only, or Memory.
A bit is the basic unit of information in computing and can have one of two values: 0 or 1. The term '1 or 0' correctly reflects this binary nature, whereas '1 and 0' or '1 only' are incorrect. 'Memory' is unrelated to the definition of a bit.
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Character Encoding
Unicode later expanded to a 21-bit code space. Approximately how many characters does this support?
Unicode expanded to a 21-bit code space means it can represent 2^21 code points. 2^21 equals 2,097,152, but Unicode only uses code points up to U+10FFFF, which is 1,114,112 code points, making option C correct.
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Number Systems
A number system representing eight symbols is called ____.
A number system with eight symbols (0 to 7) is called the Octal system. Binary uses two symbols, Decimal uses ten, so Octal is the correct answer.
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Larger Units Of Storage (Kb, Mb, Gb, Tb, Pb, Eb, Zb, Yb)
Which of the following statements is valid? A) 1 MB = 1024 bytes B) 1 KB = 1024 bytes C) 1 KB = 8 bytes D) None of these
1 KB (kilobyte) is equal to 1024 bytes, which is the standard definition in computing. 1 MB (megabyte) equals 1024 KB, not 1024 bytes, and 1 KB is not equal to 8 bytes. Therefore, option B is the correct statement.
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Computer Fundamentals
No computer can do anything without a ____:
A computer requires a program to perform any task; the program provides instructions that the computer executes. While a memory chip stores data, it alone does not enable the computer to do anything without a program.
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Memory Basics
In which of the following forms is data stored in a computer?
Computers store data in binary form because they operate using two states (0 and 1), which correspond to electrical off and on states. Decimal, hexadecimal, and octal are number systems used for human readability or programming convenience, but the underlying storage is binary.