Digital Logic and Design MCQs with Answers
Practice important Digital Logic and Design MCQs with answers and explanations.
Multiple Choice Questions
Q701: In the following statement Z PIN 20 ISTYPE ‘reg.invert’; The keyword “reg.invert” indicates ________
- A: An inverted register input
- B: An inverted register input at pin 20
- C: Active-high Registered Mode output
- D: Active-low Registered Mode output
View Answer
A
Q702: What is the primary difference between the 74HC194 and other shift registers?
- A: It has both parallel and serial input/output capability
- B: It only has serial input capability
- C: It is unidirectional
- D: It operates on negative clock transitions
View Answer
A
Q703: What is the major application of a shift register?
- A: Keyboard scanning
- B: Logic gate simplification
- C: Converting between parallel and serial data
- D: Memory storage
View Answer
C
Q704: Which register replaces a Multiplexer-Register combination to convert parallel data into serial data?
- A: Parallel In/Serial Out shift register
- B: Serial In/Parallel Out shift register
- C: Universal shift register
- D: Ring counter
View Answer
A
Q705: In an Asynchronous Serial data transmission, how many bits are transmitted to send one character?
- A: 8
- B: 10
- C: 11
- D: 12
View Answer
C
Q706: What is the function of the start bit in serial data transmission?
- A: Indicates end of data transmission
- B: Indicates idle state of the line
- C: Indicates beginning of data transmission
- D: Starts the clock generator
View Answer
C
Q707: How many stop bits are typically used in an 11-bit serial data format?
- A: 1
- B: 2
- C: 3
- D: 4
View Answer
B
Q708: What triggers the J-K flip-flop in a Serial-to-Parallel converter circuit?
- A: Stop bit
- B: Clock pulse
- C: Start bit
- D: Data bit
View Answer
C
Q709: In a Keyboard Encoder, what does the ring counter in the scanning circuit select?
- A: Column
- B: Row
- C: Keycode
- D: Scan code
View Answer
B
Q710: What happens when a key is pressed in a keyboard encoder circuit?
- A: The corresponding row becomes logic 0
- B: The corresponding column becomes logic 0
- C: The ring counter resets
- D: The clock stops
View Answer
B