The OR operation is performed by which property in Boolean algebra? Associative properties Commutative properties Distributive properties All of the mentioned
All of the mentioned
The Boolean expression X = (A +B)(C+D) represents Two ORs ANDed together Two ANDs ORed together A 4- input OR gate A 4- input AND gate
F(X,Y,Z) = XYZ`. The degree of the function is __ 3 5 4 1
*pending
Complement of the expression A’B + CD’ is _ (A’ + B)(C’ + D) (A’ + B)(C’ + D’) (A + B’)(C’ + D) (A + B’)(C+ D’)
(A + B’)(C’ + D)
The binary equivalent of 28 is 11100 11101 10100 111001
11100
Practical
1.1
If a signal passing through a gate is inhibited by sending a low into one of the inputs, and the output is HIGH, then what kind of gate satisfies the given condition? NAND NOT OR AND
NAND
The logic gate that will have HIGH or “1” at its output when any one of its inputs is HIGH is a: OR AND NOR NOT
OR
How many NAND circuits are contained in an HD74LS00 NAND gate IC? 4 6 2 3
4
NOT gate is used as an inverter. True False
True
Choose the odd one out Watch Calculator Computer Coal
Coal
Boolean expression for XNOR gate is AB + A’B’ AB A’B’ AB’ + A’B
AB + A’B’
What are the advantages of the digital systems? High-efficiency Uses less bandwidth Encryption All of the above
All of the above
How many possibilities does two-bit number have? 2 3 4 8
4
The boolean algebra is given by _ George Boole Pascal Ronald J Tocci None of the above
George Boole
All real-life signals are __ in nature Digital Analog Discrete None of the above
How many pins does temperature sensor have? 3 2 1 4
3
What is the relation of temperature to resistance in LM35? linear at 10mv rising exponential declining exponential no effect
*PENDING
The logical product of two or more than two logical sums is termed as OR operation POS SOP NAND operation
POS
What are the complements used for subtraction? Binary subtraction Hexadecimal subtraction BCD & Excess-3 subtraction All of the above
All of the above
The Karnaugh map is developed in which year? 1951 1952 1953 1954
1953
What is the output of the temperature sensor? Temperature Resistance proportional to the instantaneous temperature Analog signal proportional to the instantaneous temperature None of the above
Analog signal proportional to the instantaneous temperature
Who invented Gray code? Frank Gray Dom Hofmann Aryabhatta None of the above
Frank Gray
__ is used in communication process to minimize the effect of noise. Digital signal Analog signal Electrical signal None of the above
Digital signal
1.3
Exclusive-OR (XOR) logic gates can be constructed from ………..logic gates. OR gates only AND gates and NOT gates AND gates, OR gates, and NOT gates OR gates and NOT gate
AND gates, OR gates, and NOT gates
……….. truth table entries are necessary for a four-input circuit. 4 8 12 16
16
A radix K number system requires how many different symbols to represent the digits 0 to K – 1? K K-1 K+1 1
K
Both OR and AND gates can have only 2 inputs. True False
False
……….. input values will cause an AND logic gate to produce a HIGH output. At least one input is HIGH At least one input is LOW All inputs are HIGH All inputs are LOW
OR operation is achieved through a NAD gate with additional.. AND gate OR gate XOR gate Inverters
XOR gate
The inputs of a NAND gate are connected together. The resulting circuit is …………. OR gate AND gate NOT gate None of the above
NOT gate
The only function of NOT gate is to …………….. Stop signal Invert input signal Act as a universal gate None of the above
Invert input signal
An OR gate has 4 inputs. One input is high and the other three are low. The output is ……. Low High Alternately high and low May be high or low depending on relative magnitude of inputs
High
A single transistor can be used to build ………….. gates . OR Gate NOT Gate AND Gate
NAND Gate
1.4
The K-map based Boolean reduction is based on the following Unifying Theorem: A + A’ = 1. Impact Non Impact Force Complementarity
Non Impact
Product-of-Sums expressions can be implemented using _ 2-level OR-AND logic circuits 2-level NOR logic circuits 2-level XOR logic circuits Both 2-level OR-AND and NOR logic circuits
Both 2-level OR-AND and NOR logic circuits
The Boolean expression Y = (AB)’ is logically equivalent to what single gate? NAND NOR AND OR
NAND
Four adjacent ‘1’s in a Karnaugh map forms a_______ . octet singlet pair quad
quad
Each group of adjacent Minterms (group size in powers of twos) corresponds to a possible product term of the given _ Function Value Set Word
Function
If n denotes the number of variable then the number of cells are given as 2n 2+n 2-n 2 to the power of n
Using the transformation method you can realize any POS realization of OR-AND with only. XOR NAND AND NOR
NOR
The prime implicant which has at least one element that is not present in any other implicant is known as _ Essential Prime Implicant Implicant Complement Prime Complement
Essential Prime Implicant
Each “1” entry in a K-map square represents ___ A HIGH for each input truth table condition that produces a HIGH output A HIGH output on the truth table for all LOW input combinations A LOW output for all possible HIGH input conditions DON’T CARE condition for all possible input truth table combinations
A HIGH for each input truth table condition that produces a HIGH output
Which of the following expressions is in the sum-of-products form? (A + B)(C + D) (A * B)(C * D) A* B *(CD) A * B + C * D
