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