Quiz on Microprocessors and Microcontrollers

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

• A. 8-bit data bus

• B. 16-bit address bus

• C. On-chip memory

• D. 74 instructions

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

• A. Manage memory access

• B. Monitor power supply

• C. Reset the system in case of software malfunction

• D. Control external devices

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

• A. 8 bits

• B. 12 bits

• C. 16 bits

• D. 32 bits

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

• A. Enables memory write

• B. Latches the address from multiplexed bus

• C. Controls I/O ports

• D. Increments the program counter

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

• A. NOP

• B. MOV

• C. JMP

• D. CALL

The stack pointer in 8085 microprocessor is a:

• A. 8-bit register

• B. 16-bit register

• C. 32-bit register

• D. 64-bit register

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

• A. RAM

• B. ROM

• C. EEPROM

• D. SRAM

Which interrupt in 8085 has the highest priority?

• A. RST7.5

• B. TRAP

• C. INTR

• D. RST6.5

The 8051 microcontroller has how many timers/counters?

• A. 1

• B. 2

• C. 3

• D. 4

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

• A. Data and instructions share the same memory

• B. Data and instructions use separate memory

• C. It does not use RAM

• D. It only supports 8-bit instructions