Computer Science for IGCSE & O level - Boolean Logic (Section 6)
1
What logic gate's output is 'HIGH' if *any* of its inputs is HIGH?
Одговорити
(B)
OR gate
2
Which of the following represents the correct order of operation to implement Y = A OR (B AND C)?
Одговорити
(B)
B AND C then OR with A.
3
Which operation does the OR gate perform?
Одговорити
(A)
Addition
4
In the engine management system, what logic operation is implemented to determine whether to activate the warning light?
Одговорити
(A)
AND and OR
5
In Boolean algebra, which symbol represents the AND operation?
Одговорити
(B)
*
6
Which of these expressions is simplified to A?
Одговорити
(D)
A . 1
7
If a logic circuit is designed to output 1 when either A is 1, B is 1, or C is 1, which of the following expressions represents the output?
Одговорити
(B)
A OR B OR C
8
In the Boolean expression, what represents the 'inversion' operation?
Одговорити
(C)
'
9
What are the components of a basic AND gate?
Одговорити
(A)
One or more inputs and one output.
10
In the context of digital logic, what does the term 'truth table' describe?
Одговорити
(C)
A table showing all possible input combinations and their corresponding output values
11
What does the term 'boolean algebra' deal with?
Одговорити
(B)
Binary values and logical operations
12
What logic gate is represented by the expression (A.B)'?
Одговорити
(A)
NAND
13
If the inputs to a NOR gate are A=1 and B=0, what is the output?
Одговорити
(A)
0
14
How many different combinations of input values are possible for a 3-input logic gate?
Одговорити
(D)
8
15
In a 2-input OR gate, what is the output if one input is 1 and the other is 0?
Одговорити
(B)
1
16
If A = 1 and B = 1, then the output of an AND gate is:
Одговорити
(B)
1
17
In the context of the manufacturing system for plastic pipes, if the pressure is 4 bar and the temperature is 300 degrees Celsius, will the alarm sound?
Одговорити
(B)
No
18
In digital logic, the term 'inversion' is most closely associated with which gate?
Одговорити
(C)
NOT
19
What type of gate is formed by inverting the output of an AND gate?
Одговорити
(B)
NAND gate
20
If the inputs to an XOR gate are A=1 and B=0, the output is:
Одговорити
(B)
1
21
If A=0, what is the result of NOT A?
Одговорити
(B)
1
22
Which gate is used to represent A OR B?
Одговорити
(B)
OR gate
23
Which of the following gates is the complement of the AND gate?
Одговорити
(B)
NAND
24
What function is performed by a NAND gate?
Одговорити
(A)
AND followed by NOT
25
What is the purpose of a logic circuit?
Одговорити
(B)
To perform calculations.
26
What is the output of an OR gate if all its inputs are LOW (0)?
Одговорити
(A)
0
27
The output of a NOR gate is high (1) only when:
Одговорити
(A)
All inputs are low (0)
28
What is the result of the NOT operation on the input 1?
Одговорити
(A)
0
29
Which of the following statements is true for an XOR gate?
Одговорити
(C)
The output is HIGH if the inputs are different
30
What is the output of an XOR gate if both inputs are 0?
Одговорити
(A)
0
31
Given the expression (A + B) · C, what is the final gate implemented in this expression?
Одговорити
(B)
AND
32
If A = 0 and B = 1, then what is the output of a NAND gate?
Одговорити
(B)
1
33
Which gate is the inverse of an AND gate?
Одговорити
(C)
NAND
34
What is the function performed by the OR gate?
Одговорити
(B)
Logical OR
35
How can a NAND gate be implemented using an AND gate and a NOT gate?
Одговорити
(A)
Connect the output of the AND gate to the input of the NOT gate.
36
If A = 0, B = 1, and C = 0. What is the output of (A OR B) AND C?
Одговорити
(A)
0
37
What is the output of an OR gate with inputs A=1 and B=1?
Одговорити
(B)
1
38
Which type of gate is functionally equivalent to an OR gate followed by a NOT gate?
Одговорити
(B)
NOR gate
39
In a half adder, which outputs are available?
Одговорити
A
B
40
In an AND gate with two inputs, the output is:
Одговорити
(A)
HIGH when both inputs are HIGH.
41
The symbol for the NOT operation in Boolean algebra is:
Одговорити
(C)
!
42
Which gate's output will be LOW (0) if at least one input is HIGH (1)?
Одговорити
(B)
NOR
43
Which of the following is the correct Boolean expression for a 2-input NAND gate?
Одговорити
(B)
NOT(A * B)
44
What is the output of an AND gate with inputs A=1, B=0, and C=1?
Одговорити
(A)
0
45
What does the term 'fan-out' refer to in digital logic?
Одговорити
(C)
The maximum number of gate inputs that the output of a gate can drive
46
Which gate's output is LOW if at least one input is HIGH?
Одговорити
(B)
NOR
47
The output of an OR gate is TRUE (1) when:
Одговорити
(C)
Any one or more inputs are TRUE (1).
48
Which gate inverts the input signal?
Одговорити
(C)
NOT
49
What does 'NAND' stand for?
Одговорити
(A)
NOT AND
50
Which gate has the truth table outputting HIGH when any of the inputs are HIGH?
