WorksheetsQuiz on Flip-Flops and Registers
Total questions: 57
Worksheet time: 54mins
In an SR flip-flop, when both S and R inputs are HIGH, the output is:
Set
Reset
Toggle
Invalid state
Which of the following is true for an SR flip-flop?
It has no clock input
It stores 2 bits
It has an indeterminate state when S = R = 1
It is edge-triggered only
The main advantage of the JK flip-flop over the SR flip-flop is:
Higher speed
No invalid state
Lower cost
Requires fewer inputs
In a JK flip-flop, when both J and K are HIGH, the output will:
Remain the same
Toggle
Reset
Set
The D in D flip-flop stands for:
Direct
Data
Delay
Digital
The characteristic equation of a D flip-flop is:
Q(next) = JQ′ + K′Q
Q(next) = D
Q(next) = S + R′
Q(next) = Q
An edge-triggered flip-flop changes its state:
Whenever the clock is HIGH
Only at the rising or falling edge of the clock
When both inputs are HIGH
Continuously with the clock
In a positive edge-triggered flip-flop, the output changes:
At the high-to-low transition of the clock
At the low-to-high transition of the clock
When the clock is LOW
When the clock is HIGH
Which of the following is not an application of flip-flops?
Data storage
Frequency division
Debouncing switches
Voltage regulation
Flip-flops can be used to construct:
Counters
Shift registers
Memory units
All of the above
A register is primarily used for:
Arithmetic operations
Data storage
Modulation
Frequency division
A register consists of:
Resistors
Capacitors
Flip-flops
Inductors
A shift register moves data:
Only to the left
Only to the right
Left or right depending on control
Randomly
In a 4-bit serial-in serial-out (SISO) shift register, how many clock pulses are needed to shift out all data?
1
2
3
4
The main use of a shift register is:
Data conversion between serial and parallel formats
Voltage regulation
Signal amplification
Frequency generation
In a serial-to-parallel converter, data is:
Entered bit-by-bit and read out simultaneously
Entered all at once and read out bit-by-bit
Entered and read bit-by-bit
Entered and read all at once
Which type of shift register is used in serial-to-parallel conversion?
SISO
SIPO
PISO
PIPO
In a parallel-to-serial converter, data is:
Entered bit-by-bit and read out simultaneously
Entered all at once and read out bit-by-bit
Entered and read bit-by-bit
Entered and read all at once
Which type of shift register is used in parallel-to-serial conversion?
SISO
SIPO
PISO
PIPO
A bidirectional shift register can:
Shift data left only
Shift data right only
Shift data both left and right
Not shift at all
The basic building block of a shift register is:
AND gate
OR gate
Flip-flop
Multiplexer
In a universal shift register, you can:
Shift left
Shift right
Load in parallel
All of the above
Which register type is used for temporary data storage in microprocessors?
Shift register
Instruction register
General-purpose register
Counter
Which is not an application of shift registers?
Data storage
Data transfer
Digital delay lines
Voltage amplification
To convert serial data from a keyboard into parallel data for a computer, you would use:
SISO
SIPO
PISO
PIPO
To transmit parallel data from a computer to a printer serially, you would use:
SISO
SIPO
PISO
PIPO
In an asynchronous counter, the flip-flops are triggered:
All at the same time
One after another
By an external oscillator only
By random signals
Another name for an asynchronous counter is:
Ripple counter
Shift counter
Ring counter
Binary counter
A 3-bit asynchronous up counter has how many states?
3
6
7
8
The main disadvantage of asynchronous counters is:
High cost
Complexity
Cumulative propagation delay
Limited counting range
In a synchronous counter, all flip-flops are triggered:
Sequentially
Simultaneously
By random inputs
One after another
A synchronous down counter counts:
0,1,2,3…
Highest value to 0
Random values
Both up and down
Which of the following is true about synchronous counters?
Slower than asynchronous counters
No cumulative propagation delay
Cannot count down
Require no clock signal
A 4-bit synchronous down counter starting at 1111 (15) will next go to:
0000
1110
0001
0111
A decade counter counts from:
0 to 7
0 to 9
1 to 10
0 to 15
How many flip-flops are required for a decade counter?
2
3
4
5
A decade counter is also called a:
Mod-8 counter
Mod-10 counter
Mod-16 counter
Mod-12 counter
In a decade counter, after 1001 (9) the next state is:
0000
1010
1111
0001
Which counter type is preferred for high-speed operation?
Asynchronous
Synchronous
Ripple
Ring
Which counter type is easiest to design?
Synchronous
Asynchronous
Decade
Johnson
A MOD-16 counter needs how many flip-flops?
3
4
5
8
Which counter type can be configured to count both up and down?
Up counter only
Down counter only
Up/Down counter
Decade counter
Which of the following is an analog sensor?
(a)
What does TTL stand for?
Which of the following devices is used to control high-voltage circuits with a low-voltage signal?
(a)
What is the key difference between TTL and CMOS?
What type of A/D converter uses a binary search algorithm to approximate the input signal?
In a relay, the component that switches the high-voltage side is known as the:
(a)
Which type of sensor detects the proximity of objects without physical contact?
The R-2R Ladder D/A converter is preferred over the weighted resistor type because:
What does an A/D converter do?
Which of the following is typically used to limit the current when interfacing an LED to a microcontroller?
(a)
What is the purpose of a solenoid in a digital system?
A dual-slope A/D converter is commonly used in which type of application?
In CMOS technology, what is the primary advantage over TTL?
Which of the following is a characteristic of a thermistor?
Which type of D/A converter is simpler and provides high accuracy?
(a)
