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