Computer Science for IGCSE & O level - Boolean Logic (Section 1)
1
Which logic gate provides the inverse of the output from an AND gate?
პასუხი
(B)
NAND gate
2
What is the result of the expression (A AND B) OR (NOT A AND NOT B) in the provided image?
პასუხი
(D)
A XNOR B
3
Which gate's output is 0 only when both of its inputs are 1?
პასუხი
(A)
AND gate
4
Which of the following are considered universal gates?
პასუხი
C
D
5
Which of the following logic gates implements the Boolean expression: Y = A ⋅ B ?
პასუხი
(B)
AND
6
If A = 0 and B = 1, what is the output of an XOR gate?
პასუხი
(B)
1
7
Which gate is often used for binary addition?
პასუხი
(C)
XOR
8
Which type of logic gate implements the Boolean expression A AND B?
პასუხი
(A)
AND gate
9
Which operation is the inverse of the OR operation?
პასუხი
(B)
NOR
10
What does the acronym 'RPM' stand for in the context of the engine management system example?
პასუხი
(A)
Revolutions Per Minute
11
In Boolean algebra, what is the meaning of A * B (or A AND B)?
პასუხი
(B)
A and B
12
Which of the following logic circuits represents the given Boolean expression: Y = A OR (B AND C)?
პასუხი
(A)
A circuit with an AND gate, whose inputs are B and C. And the output of this gate is fed in an OR gate along with A.
13
What is the result of A + 1 in Boolean algebra?
პასუხი
(C)
1
14
What does 'binary value' refer to in the context of logic circuits?
პასუხი
(A)
A value that can be either a 0 or a 1.
15
Which of the following is equivalent to (A')' ?
პასუხი
(A)
A
16
How many truth table rows are required for a 3-input logic gate?
პასუხი
(D)
8
17
Which gate produces an output of '1' if and only if both inputs are '1'?
პასუხი
(B)
AND
18
What does the term 'digital logic' refer to?
პასუხი
(B)
The use of discrete voltage levels to represent information
19
If the output is 1 for A=0, B=1, and C=0, which of the following Boolean expressions could represent the corresponding logic circuit?
პასუხი
(B)
(NOT A AND B) OR (NOT C)
20
In the context of logic circuits, what does 'binary' refer to?
პასუხი
(B)
A number system with a base of 2
21
In a logic circuit designed to monitor the output of an engine management system, the output signal will go high (1) if either the exhaust temperature exceeds 400°C AND the air pressure is greater than 10 bar OR the water temperature is greater than 100°C.
პასუხი
(D)
The output signal will be high if the exhaust temperature exceeds 400°C and the air pressure is greater than 10 bar or the water temperature is greater than 100°C.
22
What are the outputs of a 2 input XOR gate when inputs are '0, 0', '0, 1', '1, 0' and '1, 1' respectively?
პასუხი
(A)
0, 1, 1, 0
23
What is the output of a XOR gate when the inputs are both the same?
პასუხი
(A)
0
24
What is the effect of a NOT gate on an input signal?
პასუხი
(B)
It complements the input signal (inverts it).
25
Which logic gate is represented by the expression (A + B)'?
პასუხი
(B)
NOR
26
Given the following Boolean expression: Y = (A AND B) OR (NOT C). Which of the following logic circuits would correctly implement it?
პასუხი
(B)
A circuit with three inputs A, B and C, where A and B are AND'd, and C is NOT'd, and the two results are OR'd.
27
Which gate provides the logical product operation?
პასუხი
(A)
AND gate
28
In a digital circuit, what is the most common system for representing logic states?
პასუხი
(B)
Binary
29
What does the term 'intermediate' refer to when discussing truth tables and circuit design?
პასუხი
(B)
Results within the truth table used to develop the final output.
30
What is the output of an XOR gate if both inputs are 0?
პასუხი
(A)
0
31
Which gate combines the inputs to produce an output if all inputs are true?
პასუხი
(B)
AND
32
Which gate is equivalent to an AND gate followed by a NOT gate?
პასუხი
(B)
NAND gate
33
What is the output of a NOR gate with inputs A=1 and B=1?
პასუხი
(A)
0
34
Based on the truth table for a half-adder, if the inputs are A=1 and B=1, what are the values of the sum and carry outputs?
პასუხი
(C)
Sum = 0, Carry = 1
35
What is the role of an OR gate?
პასუხი
(C)
To output 1 when at least one input is 1.
36
Consider the engine management system scenario (Task 2). If the exhaust temperature is 400°C, air pressure is 11 bar and water velocity is 5 m/s, will the output (Y) be 1?
პასუხი
(A)
Yes
37
Which gate's output is high only when all the inputs are low?
პასუხი
(B)
NOR
38
What happens to the output of an AND gate if one of the inputs is permanently connected to '0'?
პასუხი
(A)
Output is always 0
39
Which of the following is the correct symbol of the NOT gate?
პასუხი
(B)
A triangle pointing to the right with a circle
40
What is the output of a NOT gate if the input is 1?
პასუხი
(A)
0
41
What is the function of the 'carry' output in a full adder circuit?
პასუხი
(A)
To indicate if a sum overflows.
42
Which is the logical expression for a NOR gate?
პასუხი
(B)
¬ (A + B)
43
Which of the following gates is known as the 'exclusive OR' gate?
პასუხი
(C)
XOR
44
Which logic gate is also known as an inverter?
პასუხი
(C)
NOT
45
If A = 0 and B = 1, then what is the output of an OR gate?
პასუხი
(B)
1
46
Which gate outputs a '1' only if the inputs are different?
პასუხი
(C)
XOR
47
Based on the examples, what are the possible outputs in the circuits shown?
პასუხი
(B)
0 and 1
48
Which logic gate's output is LOW only when all inputs are HIGH?
პასუხი
(C)
NAND
49
What is the role of an OR gate in the examples shown?
პასუხი
(C)
It outputs 1 if at least one input is 1.
50
What is the output of a two-input AND gate if both inputs are 0?
