Digital Principles And System Design Set 20

On This Page

This set of Digital Principles and System Design Multiple Choice Questions & Answers (MCQs) focuses on Digital Principles And System Design Set 20

Q1 | How many NOT gates are required for the construction of a 4-to-1 multiplexer?
  • 3
  • 4
  • 2
  • 5
Q2 | In the given 4-to-1 multiplexer, if c1 = 0 and c0 = 1 then the output M is                        
  • x0
  • x1
  • x2
  • x3
Q3 | The enable input is also known as                        
  • select input
  • decoded input
  • strobe
  • sink
Q4 | The full form of HDL is                                    
  • higher descriptive language
  • higher definition language
  • hardware description language
  • high descriptive language
Q5 | The full form of VHDL is                            
  • very high descriptive language
  • verilog hardware description language
  • variable definition language
  • none of the mentioned
Q6 | VHSIC stands for                            
  • very high speed integrated circuits
  • very higher speed integration circuits
  • variable high speed integrated circuits
  • variable higher speed integration circuits
Q7 | VHDL is being used for                            
  • documentation
  • verification
  • synthesis of large digital design
  • all of the mentioned
Q8 | The use of VHDL can be done in            ways.
  • 2
  • 3
  • 4
  • 5
Q9 | At high frequencies when the sampling interval is too long in a frequency counter                            
  • the counter works fine
  • the counter undercounts the frequency
  • the measurement is less precise
  • the counter overflows
Q10 | The output frequency related to the sampling interval of a frequency counter as                            
  • directly with the sampling interval
  • inversely with the sampling interval
  • more precision with longer sampling interval
  • less precision with longer sampling interval
Q11 | In an HDL application of a stepper motor, what is done next after an up/down counter is built?
  • build the sequencer
  • test it on a simulator
  • test the decoder
  • design an intermediate integer variable
Q12 | In a digital clock application, the basic frequency must be divided down as                            
  • 1 hz
  • 60 hz
  • 100 hz
  • 1000 hz
Q13 | What does the data signal do in the keypad application?
  • the row and column encoded data
  • the ring encoded data
  • the freeze locator data
  • the ring counter data
Q14 | When a key is pressed, what does the ring counter in the HDL keypad application do?
  • count to find the row
  • freeze
  • count to find the column
  • start the d flip-flop
Q15 | A step which should be followed in project management is known as                            
  • overall definition
  • system documentation
  • synthesis and testing
  • system integration
Q16 | In the keypad application, the preset state of the ring counter define                            
  • the nanding of the columns
  • the nanding of the rows
  • the proper output of the column encoder
  • the proper output of the row encoder
Q17 | A major block which is not a part of an HDL frequency counter                            
  • timing and control unit
  • decoder/display
  • display register
  • bit shifter
Q18 | A stepper motor HDL application must include
  • sequencers and multiplexers
  • types and bits
  • counters and decoders
  • variables and processes
Q19 | Which of the following is a not a characteristics of combinational circuits?
  • the output of combinational circuit depends on present input
  • there is no use of clock signal in combinational circuits
  • the output of combinational circuit depends on previous output
  • there is no storage element in combinational circuit
Q20 | 11 HDL MODELS OF COMBINATIONAL CIRCUITS
  • true
  • false
Q21 | Which of the following is not a combinational circuit?
  • adder
  • code convertor
  • multiplexer
  • counter
Q22 | In a given combinational circuit, the concurrent statements are used with selected assignments using WHEN and ELSE keyword. What is the other alternative to implement the same?
  • with-select
  • with-select-when
  • if-else
  • case
Q23 | For using a process to implement a combinational circuit, which signals should be in the sensitivity list?
  • inputs of the circuit
  • outputs of the circuit
  • both of the inputs and outputs
  • no signal should be in the sensitivity list
Q24 | A 4 to 16 decoder can be used as a code converter. What will be the inputs and outputs of the converter respectively?
  • binary, octal
  • octal, binary
  • hexadecimal, binary
  • binary, hexadecimal
Q25 | Latches constructed with NOR and NAND gates tend to remain in the latched condition due to which configuration feature?
  • low input voltages
  • synchronous operation
  • gate impedance
  • cross coupling