Computer Science for IGCSE & O level - Boolean Logic (Section 4)
1
If the input to a NOT gate is 0, what is the output?
Trả lời
(B)
1
2
Which type of gate produces an output of 1 when the inputs are different?
Trả lời
(A)
XOR gate
3
In digital logic, what is the purpose of a 'buffer'?
Trả lời
B
C
4
What is the purpose of using intermediate values within a truth table, as seen in the provided examples?
Trả lời
(B)
To break down a complex expression into manageable parts.
5
What is the output of a two-input NOR gate when both inputs are 0?
Trả lời
(B)
1
6
What does the term 'logic circuit' refer to?
Trả lời
(B)
A circuit composed of logic gates
7
What type of circuits are logic gates primarily used in?
Trả lời
(C)
Electronic circuits
8
What is the result of the Boolean expression NOT (1 AND 0)?
Trả lời
(B)
1
9
What is a primary reason for creating a truth table when designing logic circuits?
Trả lời
(B)
To visually display the input and output relationships.
10
In the context of logic circuits, what is the purpose of a 'logic expression'?
Trả lời
(C)
To represent the functionality of a logic circuit using mathematical notation.
11
Which logic gate produces an output that is the inverse of an AND gate?
Trả lời
(B)
NAND
12
What is the function of the NOT gate?
Trả lời
(A)
Inverts the input signal
13
Which of the following is a key component in the example of designing a logic circuit for a wood system?
Trả lời
(B)
Analyzing the real-world parameters.
14
What will be the output of a full-adder if the inputs are: A=1, B=1, and Cin=1?
Trả lời
(A)
Sum=1, Cout=1
15
What does the symbol NOT represent in the examples?
Trả lời
(A)
A inverting function
16
What is the output of a NAND gate if input A is 1 and input B is 1?
Trả lời
(A)
0
17
What is the value of 'A' in Boolean algebra if A = 0?
Trả lời
(B)
0
18
Which logic gates are combined to make the final logic circuit shown in the example?
Trả lời
(D)
NOT, AND, and OR
19
What is the output of the logic gate NOT (A) if A=1?
Trả lời
(A)
0
20
What is the purpose of the truth table?
Trả lời
(A)
To represent all the possible input and output combinations of a logic circuit.
21
What does the Karnaugh map primarily help with in digital logic?
Trả lời
(A)
Simplifying Boolean expressions
22
What is the output of a 2-input OR gate when both inputs are 1?
Trả lời
(B)
1
23
What is the simplest form of the expression A + AB?
Trả lời
(A)
A
24
If A=0, and B=0, what will be the output of an AND gate?
Trả lời
(A)
0
25
How are the intermediate logic circuits connected to produce the final output?
Trả lời
(D)
Dependent on the specific logic expression.
26
If an input A is connected to two NOT gates in series, what is the resulting output signal?
Trả lời
(A)
A
27
Which of the following statements about the half-adder circuit is correct?
Trả lời
(D)
All of the above.
28
What is the output of a two-input AND gate if the inputs are 0 and 1?
Trả lời
(A)
0
29
In a half adder, if A=1 and B=0, what will the Sum be?
Trả lời
(B)
1
30
How many possible input combinations does a 2-input logic gate have?
Trả lời
(D)
4
31
Based on the examples, what type of values represent the output of a logic circuit?
Trả lời
(B)
Only 0 and 1.
32
The output of a NOR gate is HIGH (1) if:
Trả lời
(D)
None of the inputs are HIGH
33
In the example of the engine management system, what would the output (Y) be if motor speed = 4000rpm, bearing temp = 70C and water velocity = 3 m/s?
Trả lời
(A)
1
34
What is the purpose of a half adder circuit?
Trả lời
(C)
To add two single-bit binary numbers.
35
In Boolean algebra, what does the 'plus' symbol (+) represent?
Trả lời
(B)
OR operation
36
In the manufacturing system for plastic pipes, the system will sound an alarm (X), if the temperature is >= 250 degrees Celsius AND the pressure is at 5 bar. If temperature is 250 and the pressure is at 4, what will be the state of X?
Trả lời
(B)
0
37
Which gate's output is '1' if at least one input is '1'?
Trả lời
(B)
OR
38
In Boolean algebra, what logical operation does the plus sign (+) represent?
Trả lời
(B)
OR
39
What is the output of an OR gate with inputs A=0 and B=1?
Trả lời
(B)
1
40
Which gate will produce the output 1 if input A=0 and input B=0?
Trả lời
(A)
NAND gate
41
What is the purpose of logic gates in digital circuits?
Trả lời
A
C
42
In the wood system example, what do the different 'conditions' refer to?
Trả lời
(B)
Input parameters or thresholds.
43
What is the role of an AND gate in the examples?
Trả lời
(A)
It outputs 1 only if all inputs are 1.
44
What is the binary equivalent of decimal number 3?
Trả lời
(D)
11
45
What is the result of 'A OR A' in Boolean algebra?
Trả lời
(C)
A
46
What is the function of a truth table in digital logic?
Trả lời
(C)
To show the relationship between the inputs and the outputs
47
What is the simplified form of A.A in Boolean algebra?
Trả lời
(A)
A
48
What is the output of a two-input AND gate when the inputs are A=1 and B=1?
Trả lời
(B)
1
49
How many possible states can a single bit represent?
