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