2 A standard symbol for an AND gate is: A D-shaped B Rectangular with a curved input side C Triangular with a small circle at the output D Circle with a plus sign
3 In a Karnaugh map (K-map), what does each cell represent? A A minterm B A maxterm C A logic gate D A truth table row
5 In a Karnaugh map, adjacent cells differ by how many variable(s)? A One B Two C Three D All variables
6 A full-adder circuit is used to add: A Two bits only B Two bits along with a carry input C Three bits with no carry input D Four bits at a time
7 The carry output of a half-adder is generated by which gate? A XOR gate B OR gate C AND gate D NOT gate
8 Which circuit is used to add two binary bits and produces a sum and a carry? A Half-adder B Full-adder C Multiplexer D Decoder
9 Which logic gate gives a HIGH output only when both of its inputs are different? A AND gate B OR gate C XOR gate D NOR gate
10 In a logic diagram, the standard symbol for a NOT gate is: A A triangle with a small circle at the output B A D-shaped symbol C A shield-shaped symbol D An oval-shaped symbol
11 A minterm is a product term in which each variable appears: A Only in complemented form B Only in uncomplemented form C Exactly once, either complemented or uncomplemented D Twice
12 Which logic gate gives output 1 only when both inputs are 1? A OR gate B AND gate C NOT gate D NOR gate
13 A full-adder can be constructed using: A Two half-adders and an OR gate B One half-adder and an AND gate C Three half-adders D Four half-adders
14 What are the two possible values of a binary variable? A 1 and 2 B 0 and 1 C True and False only D High and Low voltage only
15 Which logic gate produces a HIGH output only when all of its inputs are HIGH? A OR gate B AND gate C NOT gate D NOR gate
16 Which logic gate produces a high output when its inputs are different? A AND gate B OR gate C XOR gate D NOR gate
18 Which logic gate produces a HIGH output only when both inputs are HIGH? A OR gate B AND gate C NOT gate D NOR gate
19 Which logic gate is equivalent to a combination of an AND gate followed by a NOT gate? A NAND gate B NOR gate C XOR gate D XNOR gate
21 What is the main purpose of a Karnaugh map? A To draw circuit diagrams B To simplify Boolean expressions C To convert analog signals to digital D To design adders
22 In a Karnaugh map, what does each cell represent? A A maxterm B A minterm C A logic gate D A truth table row
23 Which Boolean law is represented by A + AB = A? A Commutative law B Absorption law C De Morgan's law D Associative law
24 In a half-adder circuit, the sum output is obtained by using: A AND gate B OR gate C XOR gate D NOT gate
25 Which logic gate is equivalent to an AND gate followed by a NOT gate? A NAND gate B NOR gate C XOR gate D XNOR gate