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