Question 2 - Sample Paper 1 by Teachoo - Teachoo Sample Paper

How many bits are there in 1 terabyte (TB) of memory?

A) 8 x 10^9

B) 8 x 10^12

C) 10^9

D) 10^12

Answer:

Answer by student

B) 8 x 10^12

Detailed answer by teachoo

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• A bit is the smallest unit of memory and can have only two values: 0 or 1.
• A byte is a group of 8 bits and can store one character of data.
• There are larger units of memory that are multiples of bytes , such as kilobyte (KB), megabyte (MB), gigabyte (GB), terabyte (TB), etc.
• The relationship between these units is based on the power of 10 or the power of 2 , depending on the context. In this question, we will assume that the units are based on the decimal system . Therefore, 1 KB = 1000 bytes, 1 MB = 1000 KB, 1 GB = 1000 MB, and 1 TB = 1000 GB.

Here is a table with the conversion between memory units based on the decimal system:

• To find out how many bits are there in 1 TB of memory, we need to multiply the number of bytes by 8. Therefore,

1 TB = 1000 GB x 1000 MB x 1000 KB x 1000 bytes x 8 bits

     = (10^3)^4 x 8 bits

     = 10^12 x 8 bits

     = 8 x 10^12 bits

• Therefore, option B) is the correct answer.

So, the correct answer is B) 8 x 10^12.

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