Q.1
When does a negative level triggered flip-flop in Digital Electronics changes its state?
  • a) When the clock is negative
  • b) When the clock is positive
  • c) When the inputs are all zero
  • d) When the inputs are all one
Q.2
Which of the following options represent the synchronous control inputs in an S – R flip flop?
  • a) S
  • b) R
  • c) Clock
  • d) Both S and R
Q.3
What must be used along with synchronous control inputs to trigger a change in the flip flop?
  • a) 0
  • b) 1
  • c) Clock
  • d) Previous output
Q.4
Which of the following majorly determines the number of emitters in a TTL digital circuit?
  • a) Fan – in
  • b) Fan – out
  • c) Propagation delay
  • d) Noise immunity
Q.5
What will be the output from a D flip – flop if the clock is low and D = 0?
  • a) 0
  • b) 1
  • c) No change
  • d) Toggle between 0 and 1
Q.6
What are the basic gates in MOS logic family?
  • a) NAND and NOR
  • b) AND and OR
  • c) NAND and OR
  • d) AND and NOR
Q.7
How must the output of a gate in a TTL digital circuit act when it is HIGH?
  • a) Acts as a voltage source
  • b) Acts as a current sink
  • c) Acts as a current source
  • d) Acts as a voltage sink
Q.8
What will be the output from a D flip-flop if D = 1 and the clock is low?
  • a) No change
  • b) Toggle between 0 and 1
  • c) 0
  • d) 1
Q.9
What is the minimum distance required for single error detection according to Hamming’s analysis in Digital Electronics?
  • a) 1
  • b) 2
  • c) 3
  • d) 4
Q.10
Which of these error-detecting codes enables to find double errors in Digital Electronic devices?
  • a) Parity method
  • b) Check sum method
  • c) Bit generation method
  • d) Odd-Even method
Q.11
What is Digital Electronics?
  • a) Field of electronics involving the study of digital signal
  • b) Engineering of devices that digital signal
  • c) Engineering of devices that produce digital signal
  • d) All pf the mentioned
Q.12
Which of the following is correct for Digital Circuits?
  • a) Less susceptible to noise or degradation in quality
  • b) Use transistors to create logic gates to perform Boolean logic
  • c) Easier to perform error detection and correction with digital signal
  • d) All of the mentioned
Q.13
What is a Circuit?
  • a) Open-loop through which electrons can pass
  • b) Closed-loop through which electrons can pass
  • c) Closed-loop through which Neutrons can pass
  • d) None of the mentioned
Q.14
Which of the following is an example of a digital Electronic?
  • a) Computers
  • b) Information appliances
  • c) Digital cameras
  • d) All of the mentioned
Q.15
Which of the following is a type of digital logic circuit?
  • a) Combinational logic circuits
  • b) Sequential logic circuits
  • c) Both a & b
  • d) None of the mentioned
Q.16
Which of the following options comes under the non – saturated logic family in Digital Electronics?
  • a) Emitter – coupled Logic
  • b) High-Threshold Logic
  • c) Integrated – injection Logic
  • d) Diode – Transistor Logic
Q.17
What is a switching function that has more than one output called in Digital Electronics?
  • a) Multi-gate function
  • b) Multi-output function
  • c) Multiple-gate function
  • d) Multiple-output function
Q.18
Which characteristic of IC in Digital Circuits represents a function of the switching time of a particular transistor?
  • a) Fan – out
  • b) Fan – in
  • c) Power dissipation
  • d) Propagation delay
Q.19
When can one logic gate drive many other logic gates in Digital Electronics?
  • a) When its output impedance is low and the input impedance is low
  • b) When its output impedance is high and the input impedance is high
  • c) When its output impedance is high and the input impedance is low
  • d) When its output impedance is low and the input impedance is high
Q.20
Which of the following digital logic circuits can be used to add more than 1 – bit simultaneously?
  • a) Full – adder
  • b) Ripple – carry adder
  • c) Half – adder
  • d) Serial adder
0 h : 0 m : 1 s