Microprocessor and Microcontroller Quiz

Which of the following is NOT a feature of the 8085 microprocessor?

• 8-bit data bus

• 16-bit address bus

• On-chip memory

• 74 instructions

In a microcontroller, the function of a watchdog timer is to:

• Manage memory access

• Monitor power supply

• Reset the system in case of software malfunction

• Control external devices

The size of the program counter in the 8051 microcontroller is:

• 8 bits

• 12 bits

• 16 bits

• 32 bits

What is the function of the ALE (Address Latch Enable) signal in 8085?

• Enables memory write

• Latches the address from multiplexed bus

• Controls I/O ports

• Increments the program counter

Which of the following instructions is used for software delay in microprocessor programming?

• NOP

• MOV

• JMP

• CALL

The stack pointer in 8085 microprocessor is a:

• 8-bit register

• 16-bit register

• 32-bit register

• 64-bit register

Which memory is non-volatile and can be electrically erased and reprogrammed?

• RAM

• ROM

• EEPROM

• SRAM

Which interrupt in 8085 has the highest priority?

• RST7.5

• TRAP

• INTR

• RST6.5

The 8051 microcontroller has how many timers/counters?

• 1

• 2

• 3

• 4

Which of the following is true about Harvard architecture used in microcontrollers?

• Data and instructions share the same memory

• Data and instructions use separate memory

• It does not use RAM

• It only supports 8-bit instructions