Basic Digital Electronics MCQ

A PLA consists of

The boolean expression xy + xz +xyz ( xy + z ) is equal to _____.

In BCD to 7 segment decoder/driver, the input is 1000. The segments which will be lit are _____.

A memory device that contains a SRAM and EEPROM in the same chip is called _____.

A half adder consists of an _____ gate and a _____ gate.

The boolean expression XY+X+XY is equal to _____.

The most suitable gate for comparing two bits is the _____ gate.

What would be the value of X if (110001)₂= X₁₀?

A 1 us pulse can be converted into a 1 ms pulse by using a _____ multivibrator(MVR).

While designing a counter circuit, the preferred type of flip-flop is _____.

Two mod-3 counters are cascaded. The circuit will behave as a _____.

Shifting the contents of a shift register one place to the  left is equivalent to

The outputs Q and ¯Q of a master-slave S-R F/F are connected to its S and R inputs respectively. Its output Q, when clock pulses are applied, will be__________.

The design of a sequential circuit requires the use of _____.

Hexadecimal equivalent of (268)10 is_______ .

A flip-flop may be built with

If in a clocked R-S Flip Flop, point R is joined to point S through an inverter, the circuit will become a_______

When a large number of analog-signals are to be converted to the digital form, the most suitable ADC is _________ converter.

A multiplexer tree is needed when the number of inputs is more than _____.

The address bus width of a memory of size (1024*8) bit is __b___.

A transparent latch consists of a__________  .

In a 4-bit weighted-register DAC, the resistor value corresponding to MSB is 2k ohm. The resistor value corresponding to LSB will be _____.

One OR gate can work as a _____ comparator

For a flip-flop with provisions of preset and clear__________.

A memory in which the contents get erased when power-failure occurs is called_______ .

A J-K F/F may be obtained by adding__________ 

Semi-conductor memories are widely used because of their__________ .

Adding inverters to the input of an OR gate produces the _____ logic function.

In an IC-555-timer, the load can be connected _____.

A universal register _____.

How many memory locations can 14 address bits access?

The comparison time of ADC-0800 is in the range of _____.

The counting sequence of a uniform counter is 000,001,011,111,110,100.The counter is a _____.

In a microprocessor, the adder circuit is a part of

In the BCD number system, subtraction is done by the______ method.

The most important advantage of CMOS is its _____.

The race-around condition occurs in J-K F/F when____________ .

In the floating point system, the exponent is written in __________ notation.

The minimum number of resistors required in a 4-bit network of weighted resistor type DAC is ______.

Pocket calculators use the_________ system.

A monostable circuit uses a timing register of 10k ohms and a capacitor of 0.1µF capacity respectively. Its pulse-width will be approximately_____ .

Shift-registers most commonly use _____.

Which of the following memories uses an index-hole to  provide timing signals?

A multiplexer having 32 data input lines needs _____ select lines.

The write-cycle time of a memory is 200 nsec. The maximum rate at which data can be stored is________ 

A 4-bit synchronous counter uses flip-flops with the propagation delay time of 25nsec each. The maximum possible time required for the change of state will be _____.

The time taken by an ADC to perform a conversion is usually referred to as

A triggerable one-shot monostable MVR _____.

9's complement of 56 is _____.

A monostable circuit gives a pulse-width output having tp=0.3 Rx.Cx. The device employed is likely to be_____ .

In a karnaugh map, a quad eliminates _____ variables.

If inverters are added to the inputs of AND gate, the logic function is _____.

One of the two states of a circuit is stable and the others are quasi-stable. The circuit  is a _____ circuit.

In an XNOR gate, input A is high and B is low. The output will _____.

The number of 4-line-to-16-line decoders required to make an 8-line-to-250-line decoder is_____ .

A twisted ring counter consisting of 6 F/F will have

In sequential circuits, memory elements are _____.

If an ADC with 8-bit output gives full-scale deflection for 12v analog-signal, its resolution is _____.

LSI and VLSI devices use the _____ technology.

Race condition occurs in _____.

A semi-conductor ROM is basically a ________.

Which family has the fastest speed?

The addition of hexadecimal number DF₁₆ + AC₁₆

Triggering action can be obtained in a J-K F/F by __________ .