LOGIC CIRCUITS

 

1. Which number system serves as the foundation for all digital computing?

   * [ ] A) Decimal

   * [x] B) Binary

   * [ ] C) Octal

   * [ ] D) Hexadecimal

2. In binary logic, the voltage level representing a "High" state is typically denoted by which number?

   * [ ] A) 0

   * [x] B) 1

   * [ ] C) 5

   * [ ] D) 10

3. Which logic gate is known as an "Inverter"?

   * [ ] A) AND Gate

   * [ ] B) OR Gate

   * [x] C) NOT Gate

   * [ ] D) NAND Gate

4. Which gate produces a HIGH output only when all of its inputs are HIGH?

   * [ ] A) OR Gate

   * [x] B) AND Gate

   * [ ] C) NOR Gate

   * [ ] D) XOR Gate

5. A NAND gate is a combination of which two gates?

   * [ ] A) OR and NOT

   * [x] B) AND and NOT

   * [ ] C) AND and OR

   * [ ] D) NOT and NOR

6. What is the output of an OR gate if one input is 1 and the other is 0?

   * [ ] A) 0

   * [x] B) 1

   * [ ] C) 10

   * [ ] D) Floating

7. Which gate is considered a "Universal Gate" because it can be used to create any other logic gate?

   * [ ] A) AND Gate

   * [x] B) NOR Gate

   * [ ] C) XOR Gate

   * [ ] D) NOT Gate

8. How many bits are there in a single "Byte"?

   * [ ] A) 4 bits

   * [x] B) 8 bits

   * [ ] C) 16 bits

   * [ ] D) 32 bits

9. Which logic gate produces a HIGH output only when the inputs are different?

   * [ ] A) AND Gate

   * [ ] B) OR Gate

   * [x] C) XOR Gate

   * [ ] D) XNOR Gate

10. What is the decimal equivalent of the binary number 1010?

    * [ ] A) 8

    * [x] B) 10

    * [ ] C) 12

    * [ ] D) 15

11. Which electronic component is primarily used as a fast-acting switch in digital circuits?

    * [ ] A) Resistor

    * [ ] B) Capacitor

    * [x] C) Transistor

    * [ ] D) Inductor

12. The process of converting analog signals into a sequence of binary numbers is called:

    * [ ] A) Modulation

    * [x] B) Digitization (A/D Conversion)

    * [ ] C) Amplification

    * [ ] D) Rectification

13. What is the output of a NOR gate when both inputs are 0?

    * [x] A) 1

    * [ ] B) 0

    * [ ] C) -1

    * [ ] D) High Impedance

14.Which of the following are considered basic logic gates used in digital electronics?

   * [ ] A) NAND and NOR

   * [x] B) AND, OR, and NOT

   * [ ] C) XOR and XNOR

   * [ ] D) Seven-segment display

15. Which integrated circuit (IC) series is most commonly associated with standard TTL logic gates?

    * [ ] A) 555 Series

    * [x] B) 7400 Series

    * [ ] C) 4000 Series

    * [ ] D) LM Series

16. What does "LSB" stand for in digital electronics?

    * [ ] A) Low State Bit

    * [ ] B) Longest Signal Bit

    * [x] C) Least Significant Bit

    * [ ] D) Logic Sequence Bit

17. To implement an AND gate using only NAND gates, how many NAND gates are required in total?

   * [ ] A) 1

   * [x] B) 2

   * [ ] C) 3

   * [ ] D) 4

18. Which logic gate's operation can be described as "Inverted OR"?

    * [ ] A) NAND

    * [x] B) NOR

    * [ ] C) XNOR

    * [ ] D) AND

19. Which digital IC is used as a decade counter to drive a 7-segment display in digital electronic applications?

    * [ ] A) IC 741

    * [ ] B) IC 555

    * [x] C) IC 7490

    * [ ] D) IC 7805

20.In a 7-segment display, which segments must be turned ON to display the number "1"?

   * [ ] A) a and b

   * [x] B) b and c

   * [ ] C) c and d

   * [ ] D) f and g