COMPUTER ARCHITECTURE - DIGITAL COMPONENTS MCQ
- Which of the following shift operations divide a signed binary number by 2 ?
- Normally digital computers are based on
- BCD stands for
- The basic circuit ECL supports the
- An adder-subtractor single unit can be designed using full adder and
- Which of the following is not a universal building block ?
- CARRY in half adder can be obtained using
- A NAND gate has inputs A and B. It's output is connected to the both of the inputs of another NAND gate. An equivalent gate for these two NAND gates is
- The operation which commutative but not associative is
- In which of the following gates, the output is 1 if and only if at least one input is 1?
- The inverter OR gate and AND gate are called decision-making elements because they can recognize some input _____ while disregarding others. A gate recognizes a word when its output is _____
- The functional difference between SR flip-flop and JK flip-flop is that
- With an RS latch a high S and low R sets the output to _____ ; a low S and a high R _____ the output to low
- Flip-flop outputs are always
- A NOR gate has two or more input signals. All input must be _____ to get a high output
- An inverter is also called a _____ gate
- With a NAND latch a low R and a low S produce a _____ condition
- The simplified form of the Boolean expression (X + Y + XY)(X + Z) is
- De Morgan\'s first theorem says that a NOR gate is equivalent to a bubbled _____ gate
- A combinational logic circuit which is used when it is desired to send data from two or more source through a single transmission line is known as
- How many Flip-Flops are required for mod–16 counter?
- The digital logic family which has minimum power dissipation is
- Data can be changed from special code to temporal code by using
- A ring counter consisting of five Flip-Flops will have
- The speed of conversion is maximum in
- The gates required to build a half adder are
- If the input to T-flipflop is 100 Hz signal, the final output of the three T-flipflops in cascade is
- The device which changes from serial data to parallel data is
- A device which converts BCD to Seven Segment is called
- The access time of ROM using bipolar transistors is about
- The A/D converter whose conversion time is independent of the number of bits is
- A 4-bit synchronous counter uses flip-flops with propagation delay times of 15 ns each. The maximum possible time required for change of state will be
- Words having 8-bits are to be stored into computer memory. The number of lines required for writing into memory are
- In successive-approximation A/D converter, offset voltage equal to 1/2 LSB is added to the D/A converter’s output. This is done to
- How many flip flops are required to construct a decade counter
- Which TTL logic gate is used for wired ANDing
- The MSI chip 7474 is
- When the set of input data to an even parity generator is 0111, the output will be
- How many flip-flops are required to construct mod 30 counter
- The number of control lines for 16 to 1 multiplexer is
- The number of control lines for 32 to 1 multiplexer is
- The logic 0 level of a CMOS logic device is approximately
- How many select lines will a 32:1 multiplexer will have
- Which of following consume minimum power?
- ABCD - seven segment decoder / driver in connected to an LED display. Which segments are illuminated for the input code DCBA = 0001
- How many flip-flops are required to produce a divide-by-32 device?
- A demultiplexer can be used as
- 'n' Flip flops will divide the clock frequency by a factor of
- If the clock input applied to a cascaded Mod-6 & Mod-4 counter is 48KHz. Than the output of the cascaded arrangement shall be of
- Logic gates with a set of input and outputs is arrangement of
- A flip-flop is a binary cell capable of storing information of
- A device/circuit that goes through a predefined sequence of states upon the application of input pulses is called
- A combinational logic circuit which sends data coming from a single source to two or more separate destinations is
- Advantage of synchronous sequential circuits over asynchronous ones is
- A basic AND gate consists of ______________inputs and an output
- In the AND gate, the output is ‘High’ or gate is ‘On’ only if both the inputs are ______________
- It is a simple combinational digital circuit built from logic gates
- It is used to subtract two inputs having more than one bit
- It is a circuit, which subtracts two inputs each of one bit
- It is the converse of decoding and contains 2^n (or fewer) input lines and n output lines
- It directs data from input to a selected output line
- It is a very useful combinational circuit used in communication systems
- This converter deals with converting binary code to gray code
- It compares two n-bit values to determine whether one of them is greater or if they are equal
- It is a circuit, which has a number of input lines and selection lines with one output line
- It is a circuit, which can remember values for a long time or change values when required
- It is a sequential circuit that cycles through a sequence of states
- It is a counter where the flip-flops do not change states at exactly the same time, as they do not have a common clock pulse
- It is a bi-directional counter capable of counting in either of the direction depending on the control signal
- In this logic, output depends not only on the current inputs but also on the past input values. It needs some type of memory to remember the past input values
- In a combinational circuit, each output depends entirely on the ________ inputs to the circuit
- In ________________ circuit, the output depends on both the present and the past inputs
- The steps required for the analysis of combinational circuits are
- Circuits that are more complex can be built using the __________ method
- BCD-to-Excess-3 Code Conversion is a example of a ______________
- The four common and useful MSI circuits are
- Decoders often come with an enable signal, so that the device is only activated when the enable E equals to ___________
- When more than one input can be active, the priority ____________ must be used
- A _________________ is a circuit, which can remember values for a long time or change values when required
- A ________________ circuit is not suitable in the synchronous circuit design because of its transparency nature
- There are________________ basic types of flip-flop based on clock trigger
- The characteristic equation of any flip-flop describes the __________________ of the next state in terms of the present state and inputs
- The normal data inputs to a flip-flop (D, S and R, J and K, T) are referred to as ________________ inputs
- Asynchronous inputs, just like synchronous inputs, can be engineered to be ______________
- ___________ and Clear should not be 0 at the same time; otherwise, both the outputs will be 1, which is known as invalid state
- Which table indicates the input conditions of the flip-flops necessary to cause all possible next state transitions of a flip-flop?
- When a circuit is self- correcting?
- A PLA consists of two-level____________ circuits on a single chip
- In which of the following types of counters, the flip-flops do not change states at exactly the same time?
- The number of states through which the counter goes is also known as ____________
- It contains an equal resistor or current source segment for each possible value of DAC output
- The total current can be converted into the corresponding voltage by using a/an _______________
- The number of resistors required for an N-bit DAC is 2N in the case of _____________
- The characteristics of a DAC, which are generally specified by the manufacturers
- To start the conversion in successive approximation DAC the programmer sets the MSB to ___________ and all other bits to __________
- The major block(s) of the dual- slope ADC
- A counter with 10 states
- In asynchronous flip-flop, ______________ and clear pin shows negation
- It is a single input version of J-K flip-flop formed by tying both the inputs of J-K
- In flip-flop, the ___________ arrow shows positive transition on the clock
- Gated S-R latch is a combination of which latch and gate?
- Which of the following is the advantage of PLD over ICs?
- In a DAC, the possible number of digital input is __________
- An n-bit register has a group of n flip-flops and some
- It does not have any external gate
- A register used to provide data movements
- There are ___________ basic types of shift registers
- This type of register accepts inputs data serially
- This type of register accepts inputs data simultaneously and output is also coming out parallel
- In this type of register, data can be shifted in either right or left direction by using control signal
- In this type of counter, the complement of the output of the last stage of the shift register is fed back to the D input of the first state
- In this type of counter, the output of the last stage is connected to the D input of the first stage
- A device that exhibits two different stable states and functions as a memory element in a binary system is known as______________________
- The different types of flip-flops are_____, __________ and____________
- The __________latch is an asynchronous flip-flop which can be constructed from two NAND gates connected back to back
- Memory is a circuit, which is used to store ____________ information
- A register that can be either static or dynamic
- Read Only Memory (ROM), as the name suggests, is meant only for __________information from it
- Memory can be classified on the basis of the ______________ technology used
Computer
(c).Dual edge triggered D flip-flop (TTL)
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