A 64-bit bus can transmit how many bytes of data at a time?

A 64-bit bus can transmit how many bytes of data at a time?

• A. 2
• B. 4
• C. 8
• D. 16

Answer: (C)

The main idea is that bus width tells you how many bits are moved in one data transfer. A 64-bit bus transmits 64 bits at once. Since 1 byte equals 8 bits, 64 bits equals 64/8 = 8 bytes. So eight bytes can be transmitted per transfer. The other options correspond to smaller bit widths: 2 bytes would be 16 bits, 4 bytes would be 32 bits, and 16 bytes would be 128 bits, which aren’t the width described.

The main idea is that bus width tells you how many bits are moved in one data transfer. A 64-bit bus transmits 64 bits at once. Since 1 byte equals 8 bits, 64 bits equals 64/8 = 8 bytes. So eight bytes can be transmitted per transfer. The other options correspond to smaller bit widths: 2 bytes would be 16 bits, 4 bytes would be 32 bits, and 16 bytes would be 128 bits, which aren’t the width described.