8051 microcontroller questions and answers mcq online test

8051 microcontroller questions and answers mcq online test 

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1.

How many instructions available in the microcontroller family instruction set?

A : 17

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B : 45

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C : 49

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D : 111

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2.

How the logic operations performed by the MCS 51 family microcontroller?

A : Bit operand

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B : Opcode format

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C : Function mnemonic

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D : Bits and Byte operands

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3.

What is the Vcc supply pin number for the microcontroller IC 8051?

A : 21

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B : 30

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C : 38

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D : 40

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4.

What is the use of microcontroller?

A : Small systems

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B : Large and complex system

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C : General purpose systems

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D : Automatically controlled devices

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5.

What is produced by the DC motor, interfaced with 8051 microcontroller?

A : Heat

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B : Torque

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C : AC current

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D : Electric field

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6.

What is the bit length of upcounting timers in 8051 microcontroller?

A : 8 Bits

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B : 16 Bits

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C : 32 Bits

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D : 64 Bits

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7.

What is the name of the section that counts a predefined number of processor clock pulses, to generate a programmable delay?

A : Timer

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B : Counter

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C : Clock signal

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D : Clock generate

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8.

Which section in IC 8051 is running on external clock source?

A : Timer

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B : Counter

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C : Clock signal

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D : Clock generate

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9.

What is the maximum delay possible using a single 8051-microcontroller timer running at 12 MHz frequency?

A : 8192 µS

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B : 16384 µS

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C : 32768 µS

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D : 65536 µS

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10.

Which is the timer input frequency for the 8051 microcontroller running at 12 MHz?

A : 1 MHz

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B : 2 MHz

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C : 3 MHz

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D : 4 MHz

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