Computer Science for IGCSE & O level - Boolean Logic (Section 4)
1
If the input to a NOT gate is 0, what is the output?
Одговорити
(B)
1
2
Which type of gate produces an output of 1 when the inputs are different?
Одговорити
(A)
XOR gate
3
In digital logic, what is the purpose of a 'buffer'?
Одговорити
B
C
4
What is the purpose of using intermediate values within a truth table, as seen in the provided examples?
Одговорити
(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?
Одговорити
(B)
1
6
What does the term 'logic circuit' refer to?
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(B)
A circuit composed of logic gates
7
What type of circuits are logic gates primarily used in?
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(C)
Electronic circuits
8
What is the result of the Boolean expression NOT (1 AND 0)?
Одговорити
(B)
1
9
What is a primary reason for creating a truth table when designing logic circuits?
Одговорити
(B)
To visually display the input and output relationships.
10
In the context of logic circuits, what is the purpose of a 'logic expression'?
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(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?
Одговорити
(B)
NAND
12
What is the function of the NOT gate?
Одговорити
(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?
Одговорити
(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?
Одговорити
(A)
Sum=1, Cout=1
15
What does the symbol NOT represent in the examples?
Одговорити
(A)
A inverting function
16
What is the output of a NAND gate if input A is 1 and input B is 1?
Одговорити
(A)
0
17
What is the value of 'A' in Boolean algebra if A = 0?
Одговорити
(B)
0
18
Which logic gates are combined to make the final logic circuit shown in the example?
Одговорити
(D)
NOT, AND, and OR
19
What is the output of the logic gate NOT (A) if A=1?
Одговорити
(A)
0
20
What is the purpose of the truth table?
Одговорити
(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?
Одговорити
(A)
Simplifying Boolean expressions
22
What is the output of a 2-input OR gate when both inputs are 1?
Одговорити
(B)
1
23
What is the simplest form of the expression A + AB?
Одговорити
(A)
A
24
If A=0, and B=0, what will be the output of an AND gate?
Одговорити
(A)
0
25
How are the intermediate logic circuits connected to produce the final output?
Одговорити
(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?
Одговорити
(A)
A
27
Which of the following statements about the half-adder circuit is correct?
Одговорити
(D)
All of the above.
28
What is the output of a two-input AND gate if the inputs are 0 and 1?
Одговорити
(A)
0
29
In a half adder, if A=1 and B=0, what will the Sum be?
Одговорити
(B)
1
30
How many possible input combinations does a 2-input logic gate have?
Одговорити
(D)
4
31
Based on the examples, what type of values represent the output of a logic circuit?
Одговорити
(B)
Only 0 and 1.
32
The output of a NOR gate is HIGH (1) if:
Одговорити
(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?
Одговорити
(A)
1
34
What is the purpose of a half adder circuit?
Одговорити
(C)
To add two single-bit binary numbers.
35
In Boolean algebra, what does the 'plus' symbol (+) represent?
Одговорити
(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?
Одговорити
(B)
0
37
Which gate's output is '1' if at least one input is '1'?
Одговорити
(B)
OR
38
In Boolean algebra, what logical operation does the plus sign (+) represent?
Одговорити
(B)
OR
39
What is the output of an OR gate with inputs A=0 and B=1?
Одговорити
(B)
1
40
Which gate will produce the output 1 if input A=0 and input B=0?
Одговорити
(A)
NAND gate
41
What is the purpose of logic gates in digital circuits?
Одговорити
A
C
42
In the wood system example, what do the different 'conditions' refer to?
Одговорити
(B)
Input parameters or thresholds.
43
What is the role of an AND gate in the examples?
Одговорити
(A)
It outputs 1 only if all inputs are 1.
44
What is the binary equivalent of decimal number 3?
Одговорити
(D)
11
45
What is the result of 'A OR A' in Boolean algebra?
Одговорити
(C)
A
46
What is the function of a truth table in digital logic?
Одговорити
(C)
To show the relationship between the inputs and the outputs
47
What is the simplified form of A.A in Boolean algebra?
Одговорити
(A)
A
48
What is the output of a two-input AND gate when the inputs are A=1 and B=1?
Одговорити
(B)
1
49
How many possible states can a single bit represent?
