Electronics Mechanic - Mock Test 3

Question 1 / 10

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What is the primary function of the Arithmetic and Logical Unit (ALU) in a microprocessor?

To store the address of the next instruction

To perform mathematical and logical operations

To manage the flow of data between memory and CPU

To provide timing and control signals

Question 2 / 10

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What is the size of the internal Read-Only Memory (ROM) in a standard 8051 microcontroller?

256 Bytes

4K Bytes

8K Bytes

1K Bytes

Question 3 / 10

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What is the total size of the internal Random Access Memory (RAM) in a standard 8051 microcontroller?

256 Bytes

128 Bytes

512 Bytes

1K Bytes

Question 4 / 10

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How many general-purpose I/O pins are available in a standard 40-pin 8051 IC?

16

24

32

40

Question 5 / 10

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What is the bit-width of the Address Bus in an 8051 microcontroller?

4-bit

8-bit

16-bit

32-bit

Question 6 / 10

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What is the bit-width of the Data Bus in an 8051 microcontroller?

4-bit

8-bit

16-bit

32-bit

Question 7 / 10

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Which memory architecture is used by the 8051 microcontroller?

Von Neumann architecture

Princeton architecture

Harvard architecture

Stored-program architecture

Question 8 / 10

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What is the function of the RST pin on the 8051 microcontroller?

To read data from external memory

To provide a clock signal

To select program memory

To reset the microcontroller

Question 9 / 10

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What is the function of the EA (External Access) pin on the 8051 microcontroller?

To enable the address latch

To select the program memory (internal or external)

To trigger an external interrupt

To write data to external memory

Question 10 / 10

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What is the function of the PSEN (Program Store Enable) pin on the 8051 microcontroller?

To give the signal for accessing program memory

To reset the program counter

To indicate the processor status word

To provide power to the serial port