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WorksheetsSK1 CH11 - COMBINATIONAL LOGIC GATES
Total questions: 10
Worksheet time: 5mins
What is a combinational logic circuit?
A circuit with memory
A circuit where output depends only on present input
A circuit that stores previous inputs
A sequential circuit
Which of the following is NOT a derived logic gate?
NAND
NOR
XOR
AND
What does the small circle on a logic gate symbol represent?
Addition
Inversion
Multiplication
Exclusive operation
Which gate is called a universal gate?
XOR
NAND
OR
NOT
What is the Boolean function of an XOR gate?
High if both inputs are high
High if either input is high, but not both
Low if both inputs are low
Always high
What is the output of a NOR gate when both inputs are 0?
0
1
Undefined
Depends on voltage
Which statement is TRUE about XNOR gate?
It gives high output when both inputs are different
It gives high output when both inputs are same
It behaves like an OR gate
It behaves like a NAND gate
Why are NAND and NOR gates called universal gates?
They can store data
They can implement any Boolean function
They are used only in ALU
They require no power
Which truth table represents an XOR gate?
A B | Y
0 0 | 0
0 1 | 1
1 0 | 1
1 1 | 0
A B | Y
0 0 | 1
0 1 | 0
1 0 | 0
1 1 | 1
A B | Y
0 0 | 0
0 1 | 0
1 0 | 0
1 1 | 1
None of the above
If you only have NAND gates, how can you create an OR gate?
By connecting two NAND gates in series
By using three NAND gates with proper wiring
By using one NAND gate and one NOT gate
It is not possible
