AET Digital Electronics and Microprocessors 1 — Questions and Answers
Question 1: What is the decimal equivalent of the binary number 1010?
- 8
- 10 (Correct answer)
- 12
- 14
Correct answer: 10
Binary 1010 equals (1×8) + (0×4) + (1×2) + (0×1) = 10 in decimal.
Question 2: Which logic gate produces a HIGH output only when ALL inputs are HIGH?
- OR gate
- NAND gate
- AND gate (Correct answer)
- NOR gate
Correct answer: AND gate
An AND gate outputs HIGH only when every input is HIGH; any LOW input forces the output LOW.
Question 3: How many bits are contained in one byte?
- 4
- 8 (Correct answer)
- 16
- 32
Correct answer: 8
By definition, one byte consists of 8 bits, allowing values from 0 to 255.
Question 4: Which type of memory retains its stored data when electrical power is removed?
- DRAM
- SRAM
- ROM (Correct answer)
- Cache
Correct answer: ROM
ROM (Read-Only Memory) is non-volatile and retains data without power, unlike volatile RAM types.
Question 5: Which flip-flop has a single input that toggles the output state on each active clock edge?
- D flip-flop
- SR flip-flop
- T flip-flop (Correct answer)
- JK flip-flop
Correct answer: T flip-flop
The T (Toggle) flip-flop changes its output on every active clock edge when the T input is HIGH.
Question 6: What is the hexadecimal equivalent of the decimal number 255?
- EF
- FE
- FF (Correct answer)
- F0
Correct answer: FF
Decimal 255 equals (15×16) + 15, which is represented as FF in hexadecimal.
Question 7: Within a microprocessor, which unit is responsible for performing arithmetic and logic operations?
- Memory Management Unit
- ALU (Arithmetic Logic Unit) (Correct answer)
- Control Unit
- Program Counter
Correct answer: ALU (Arithmetic Logic Unit)
The ALU executes all arithmetic (addition, subtraction) and logical (AND, OR, NOT) operations in a microprocessor.
AET Digital Electronics and Microprocessors 1
What is the decimal equivalent of the binary number 1010?