1 In Boolean algebra, the AND operation is represented by which symbol? A A dot (·) B A plus sign (+) C A bar over the variable D An asterisk (*)
2 Which gate gives a high output only when its inputs are different? A AND gate B OR gate C XOR gate D NOR gate
3 Which logic gate produces a high output when its inputs are different? A AND gate B OR gate C XOR gate D NOR gate
4 In a half-adder circuit, the sum output is obtained by using which logic gate? A AND gate B OR gate C XOR gate D NOT gate
5 Which gate is used to produce the sum output in a half-adder? A AND gate B OR gate C XOR gate D NAND gate
6 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
7 Which logic gate gives a HIGH output only when all its inputs are HIGH? A OR gate B AND gate C NOT gate D NOR gate
8 In Boolean algebra, which values can a binary variable take? A 0 and 1 B -1 and 1 C 0 to 9 D Any real number
9 Which Boolean algebra law states that A + A = A? A Commutative law B Idempotent law C Distributive law D Absorption law
10 In a half-adder, the sum output is obtained by using which gate? A AND gate B OR gate C XOR gate D NOT gate
11 A half-adder circuit has how many inputs and outputs? A 1 input and 1 output B 2 inputs and 1 output C 2 inputs and 2 outputs D 3 inputs and 2 outputs
12 Which of the following is an example of an analog signal? A A signal that takes only two values: 0 and 1 B A signal that varies continuously over time C A signal represented by binary digits D A signal that is always discrete
16 Which logic gate gives output 1 only when both inputs are 1? A OR gate B AND gate C NOT gate D NOR gate
17 In a Karnaugh map, adjacent cells differ by how many variable(s)? A One B Two C Three D All variables
18 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
20 The output of a NOT gate is always: A The same as its input B The complement of its input C HIGH regardless of input D LOW regardless of input
21 Which law of Boolean algebra states that A + A = A? A Commutative law B Idempotent law C Distributive law D Absorption law
22 The output of an XOR gate is 1 when: A Both inputs are 0 B Both inputs are 1 C The inputs are different D The inputs are the same
23 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
24 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