LOGIC GATES – Air – DGCA Question Bank For Politics

#1. The logic function of the circuit shown is

AND

OR

NOR

NOT

#2. The circuit shown here represents

an ‘AND’ gate

A‘NOR’ gate.

an ‘OR’ gate.

an ‘EXCLUSIVE OR’ gate.

#3. The gate symbols shown are

‘AND’ and ‘NAND’

‘EXCLUSIVE OR’ and ‘EXCLUSIVE NOR’

‘OR’ and ‘NOR’

‘OR’ and ‘EXCLUSIVE OR’

#4. A gate which requires that all inputs must be HIGH to obtain an output would be:

a ‘NOR’ gate.

an ‘OR’ gate.

an ‘AND’ gate.

a ‘NOT’ gate.

#5. This diagram represents:

an inverter.

an ‘AND’ gate.

an ‘EXCLUSIVE NOR’ gate.

an ‘OR’ gate.

#6. To obtain logic ‘0’ at output ‘Z’ there must be

logic ‘1’ at ‘X’ and logic ‘0’ at ‘Y’.

logic ‘0’ at ‘X’ and logic ‘1’ at ‘Y’.

logic ‘1’ at ‘X’ and logic ‘1’ at ‘Y’.

logic ‘0’ at ‘X’ and logic ‘0’ at ‘Y’.

#7. A transistor:

can only be used as an amplifier.

can be used as a demi-conductor to act as an automatic switch or an amplifier.

is an inverted silicon controlled rectifier.

can be used as a semi-conductor to act as an automatic switch or an amplifier.

#8. A transistor:

is made up of crystals in the arrangement of emitter, base and collector.

is made up of crystals in the arrangement of emitter, collector and base.

is made up of crystals in the arrangement of collector, emitter and base.

requires a current of ten amps through the base to transmit.

#9. A gate with only one input and one output:

cannot be a ‘double’ gate.

is a ‘NOT’ gate.

can only be a ‘semi-gate’.

cannot be a ‘NOT’ gate.

#10. The two most commonly used gates are:

‘NOT’ and ‘NOR’

‘OR’ and ‘EXCLUSIVE AND’

‘AND’ and ‘OR’

‘AND’ and ‘NAND’

#11. Truth tables illustrate the relationship between

inputs and outputs.

integrated gates for trouble shooting.

the sequence of operation of the gates.

electronic and electrical circuits.

#12. The output expression for this type of gate is:

‘AND’

‘EXCLUSIVE NOR’

‘EXCLUSIVE OR’

‘EXCLUSIVE NOT’

#13. In order to energise the relay shown in this circuit, the logic state at the inputs must be:

logic ‘0’ at points ‘A’ and ‘B’.

logic ‘0’ at point ‘A’ and logic ‘1’ at point ‘B’.

logic ‘1’ at points ‘A’ and ‘B’.

always identical at points ‘A’ and ‘B’.

#14. The type of logic gate represented by this diagram is:

‘OR’

'NAND’

‘AND’

‘NOT’

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Results

#1. The logic function of the circuit shown is

#2. The circuit shown here represents

#3. The gate symbols shown are

#4. A gate which requires that all inputs must be HIGH to obtain an output would be:

#5. This diagram represents:

#6. To obtain logic ‘0’ at output ‘Z’ there must be

#7. A transistor:

#8. A transistor:

#9. A gate with only one input and one output:

#10. The two most commonly used gates are:

#11. Truth tables illustrate the relationship between

#12. The output expression for this type of gate is:

#13. In order to energise the relay shown in this circuit, the logic state at the inputs must be:

#14. The type of logic gate represented by this diagram is: