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