AET Digital Electronics 1 — Questions and Answers
Question 1: What is the binary equivalent of the decimal number 13?
- 1010
- 1101 (Correct answer)
- 1011
- 1110
Correct answer: 1101
Decimal 13 = 8+4+1 = 1101 in binary (8=1, 4=1, 2=0, 1=1).
Question 2: What logic gate outputs HIGH only when all inputs are HIGH?
- OR gate
- NAND gate
- AND gate (Correct answer)
- XOR gate
Correct answer: AND gate
An AND gate produces a HIGH (1) output only when all of its inputs are simultaneously HIGH (1).
Question 3: What is the hexadecimal equivalent of binary 1010 1111?
- AF (Correct answer)
- FA
- A9
- BF
Correct answer: AF
1010 = A and 1111 = F in hexadecimal, so 10101111 = AF hex.
Question 4: Which type of memory loses its data when power is removed?
- ROM
- Flash memory
- EEPROM
- RAM (Correct answer)
Correct answer: RAM
RAM (Random Access Memory) is volatile and loses all stored data when power is removed from the device.
Question 5: What does the term 'bit' refer to in digital electronics?
- A group of 8 binary digits
- A single binary digit (0 or 1) (Correct answer)
- A hexadecimal character
- A unit of frequency
Correct answer: A single binary digit (0 or 1)
A bit (binary digit) is the smallest unit of digital information, represented as either a 0 or a 1.
Question 6: In avionics, what bus protocol uses a single twisted pair for bidirectional data at 1 Mbps?
- ARINC 429
- MIL-STD-1553 (Correct answer)
- ARINC 664
- RS-232
Correct answer: MIL-STD-1553
MIL-STD-1553 is a military avionics bus standard that uses a single shielded twisted pair for half-duplex, command/response data at 1 Mbps.
AET Digital Electronics 1
What is the binary equivalent of the decimal number 13?