1)_____ is a type of adder, an electronic circuit that performs the addition of numbers.
a) Half adder b) full adder c) D Anothers
2) ____ has only two inputs and there is no provision to add a carry coming from the lower
order bits when multi addition is performed
a) Half adder b) full adder c) D Anothers
3) The _____ and addent bits are two input states, and 'carry' and 'sum 'are two output states of
the half adder.
a) half adder b) augent c) carry
4) The XOR gate is unable to generate the carry bit. For this purpose, we use another gate
called ____ gate
a) XNOR b) AND c) OR
5) The adder works by combining the operations of basic logic gates, with the
simplest form using only a ___ and an AND gate
a) XNOR b) AND c) XOR
6) _____ is the adder which adds three inputs and produces two outputs. The first two inputs
are A and B and the third input is an input carry as C-IN.
a) Half adder b) full adder c) Subtractor
7) A _____ where the speed of the parallel adder can be greatly improved using carry-look
ahead logic
a) Carry Look Ahead Binary Adder b) propagation delay c) ripple carry
8) ____ circuit is central to most digital circuits that perform addition or subtraction
a) Half adder b) full adder c) Subtractor
9) The full adder logic circuit can be constructed using the 'AND' and the 'XOR gate with
an ____.
a) XNOR gate b) OR gate c) AND gate
10) An ___ serves as a handy function that can be applied in many different types
of computational circuits and is generally used in arithmetic logic circuits,
computational logic comparators and error detection circuits.
a) XNOR gate b) XOR gate c) AND gate
11) Another common and very useful combinational logic circuit which can be constructed using just a
few basic logic gates allowing it to add together two or more binary numbers is the ______
a) binary adder b) Half adder c) full adder
12) Full-adder uses two half-adders to perform a full addition of binary digits accomodating
a carry in value. It reports the sum and ___ value.
a) carry in b) carry out c) binary value
13) A ____adder is a digital circuit that produces the arithmetic sum of two binary numbers. It can be
constructed with full adders connected in cascaded with the carry output from each full adder
connected to the carry input of the next full adder in the chain
a) ripple carry b) carry out c) carry lookahead
14) The ____takes two single bit binary numbers and produces a sum and a carry–out, called “carry”.
a) Half adder b) full adder c) Subtractor
15) ____ is a cascade of full adders that is connected in serial so that the carry can propagate through
every full adder before the process of addition is completed.
a) ripple carry adder b) carry out c) carry lookahead
16) A ______ is a combinational circuit that performs subtraction of two bits, one is minuend
and other is subtrahend, taking into account borrow of the previous adjacent lower minuend
bit.
a) Full subtractor b) Half subtractor c) half adder d) full adder
17) The ______ is a combinational circuit which is used to perform subtraction of two bits. It has
two inputs, X (minuend) and Y (subtrahend) and two outputs D (difference) and B (borrow).
a) Full subtractor b) Half subtractor c) half adder d) full adder
18) ____ is an electronic logic circuit for calculating the difference between two binary adders
which provides the difference and borrow as output.
a) Full subtractor b) Subtractor c) half adder d) full adder
19) The _____ comes into play in various digital processors, the addition of multiple bits,
and many more.
a) Full subtractor b) Subtractor c) half adder d) full adder
20) The ______ is good for digital measuring devices, computers, calculators, and many
more.
a) Full subtractor b) Subtractor c) half adder d) full adder
