1. A logic circuit which converts a decimal number to binary number is called
(A) De-Multiplexer
(B) Decoder
(C) Multiplexer
(D) Encoder
2. Multiplexer is also called
(A) Decoder
(B) Data Distributor
(C) Data Selector
(D) Encoder
3. When all LEDs of seven segment are ON, the digit will be displayed
(A) 8
(B) 7
(C) 6
(D) 0
4. Which IC is 4 ×16 decoder?
(A) 74121
(B) 74151
(C) 74138
(D) 74154
5. An encoder converts a decimal number into
(A) None of these
(B) Hexa-decimal
(C) Decimal
(D) Binary
6. A logic circuit which selects one input from many inputs by means of a control input
(A) Multiplexer
(B) Decoder
(C) Data Distributor
(D) Encoder
7. The type of seven segment display in which all cathodes of LEDs are shorted is called
(A) Common Cathode
(B) Common Ground
(C) Common LED
(D) Common Anode
8. Which IC is common anode display decoder?
(A) 7408
(B) 7448
(C) 7410
(D) 7446
9. De-multiplexer is also called
(A) Decoder
(B) Data Selector
(C) Encoder
(D) Data Distributor
10. Which LED of seven segment should be off to display the digit “0”
(A) g
(B) e
(C) f
(D) d
11. A 16 × 1 multiplexer has control inputs
(A) 8
(B) 4
(C) 12
(D) 16