Which logic gate outputs a binary 1 if and only if its two binary inputs are unequal (one is 1 and the other is 0)?
Answer and explanation
Correct answer: B. XOR gate
- Step 1: The Exclusive OR (XOR) gate performs modulo-2 addition: 0 XOR 1 = 1, 1 XOR 0 = 1, while 0 XOR 0 = 0 and 1 XOR 1 = 0. Step 2. It produces true (1) exclusively when the inputs differ. Answer: XOR gate. Why not the others: AND outputs 1 only when both are 1; XNOR outputs 1 when inputs are identical; NOR outputs 1 only when both are 0.
Practise more Computer Systems, Networking and ICT.
Free questions with an explanation for every one, and full timed Bangladesh Civil Service Preliminary Examination mock tests.
More Computer Systems, Networking and ICT questions
- Which internal CPU register holds the memory address of the next machine instruction to be fetched and executed by the processor?
- Which type of computer memory provides the fastest read and write access times directly to the arithmetic logic unit?
- How many distinct memory addresses can be uniquely referenced by a microprocessor with a 32-bit address bus?
- What is the hexadecimal equivalent of the 8-bit binary number 11011010_2?
- Which two digital logic gates are considered universal gates because any combinational circuit can be constructed solely using either of the…
- What is the core component of an operating system that maintains complete control over hardware resources, device drivers, and system memory…