logic gates 200 MCQs exam based

**1.The logical gates are categorized into _______**

One group

Two groups

**Three groups**

Four groups

2.**__________ are basic gate**

NAND & NOR

AND

**NOT, AND, & OR**

3.**__________ are universal gates**

**NAND & NOR**

AND

none

4.**__________ are arithmetic gates**

NAND & NOR

**X-OR & X-NOR**

none

**5.The basic gate of the TTL logic family is _____NAND**

NOT

NOR

None of the above

6.**The basic gate of the ECL logic family is _____**

NAND

NOT

**OR/ NOR**

XOR

**7.The power dissipation in the ECL logic family is ______**

30mv

**40-55mv**

50-80mv

60-90mv

8.**Which IC is a dual four-input AND gate?**

74LS13

74LS20

**74LS21**

None of the above

**9.Which one is a saturated bipolar logic family?RTL**

Schottky TTL

ECL

None of the above

10.**The code where all successive numbers differ from their preceding number by single bit is __________**

Alphanumeric Code

**gray code**

11.**How many AND gates are required to realize Y = AD + EF + G?**

4

5

3

2

**12.The NOR gate output will be high if the two inputs are __________**

00

01

10

13.**Which one is an unsaturated bipolar logic family?**

RTL

**Schottky TTL**

DTL

none

14.**How many types of logic families are there?**

One

**Two**

Three

Four

15.**The power dissipation in the DTL logic family is ________**1-12mv

4-12mv

6-12mv

**8-12mv**

16.**What are the components used in COS logic family?**

PMOS

NMOS

**Both a and b**

None of the above

**17.Which IC is a dual four-input NAND gate?74LS20**

74LS21

74LS27

None of the above

**18.The DTL logic family has _________**

Improved noise margin and fan-out

Low speed

**Both a and b**

None of the above

**19.What is the standard form of DCDVS logic?**

**Differential Cascade Voltage Switch**

Differential Cascade Voltage Complex

Voltage Switched

20.**_________ are the common forms of complex logic gates**

OR-AND-Invert (OAI)

AND-OR-Invert (AOI)

**Both OAI and AOI**

None of the above

**_______ are basic gates**

NAND

**NOT, AND, & OR**

AND