The +5v level TTL is called a logical

The +5v level TTL is called a logical

• A. 1 or high
• B. 0 or low
• C. Z (high impedance)
• D. X (unknown)

Answer: (A)

In TTL digital logic, a voltage at +5V is interpreted as the high state—the logical 1. This is how devices indicate a true/active signal. The low state is near 0V (logical 0). The other terms, like high impedance (Z) or unknown (X), are not the normal driving levels for a standard high or low. So the +5V level is called a logical high, i.e., 1.

In TTL digital logic, a voltage at +5V is interpreted as the high state—the logical 1. This is how devices indicate a true/active signal. The low state is near 0V (logical 0). The other terms, like high impedance (Z) or unknown (X), are not the normal driving levels for a standard high or low. So the +5V level is called a logical high, i.e., 1.