MCQs on Microprocessor

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01․ FPGA means
Field Programmable Gate Array
Forward Programmable Gate Array
Forward Parallel Gate Array
Field Parallel Gate Array

Field Programmable Gate Array (FPGA) is the re-configurable hardware, which consists of millions of logic gates which could be arranged according to the user's demand. They also have much higher frequency compared to micro controllers.

02․ Which language could be used for programming an FPGA.
Both A and B

Verilog and VHDL are the hardware description languages that are used for the programming of FPGAs. Both of these languages are case-insensitive in nature.

03․ What is mean by ALU
Arithmetic logic upgrade
Arithmetic logic unsigned
Arithmetic local unsigned
Arithmetic logic unit

It is used for arithmetic operations...

04․ Which one of the following is not a vectored interrupt?
RST 7.5.
RST 3.

Here TRAP, INTR, RST 7.5 are vectored interrupts. But RST 3 is not a vectored interrupt.

05․ 8085 microprocessor has how many pins

Intel 8085 NMOS microprocessor is a 8 bit, 40 pins IC. It is a 40 pin I.C. package fabricated on a single LSI chip. The Intel 8085 uses a single + 5 V DC supply for its operation.Its clock speed is about 3 MHz. The clock cycle is 320 ns. It has 80 basic instructions and 246 opcodes.

06․ In 8085 microprocessor, the RST6 instruction transfer programme execution to following location

07․ HLT opcode means
load data to accumulator.
store result in memory.
load accumulator with contents of register.
end of program.

HLT opcode in 8085 microprocessor means end of program.

08․ In 8085 name/names of the 16 bit registers is/are
stack pointer.
program counter.
both A and B.
none of these.

Program counter (PC) and Stack pointer (SP) are basically used to hold 16 - bit memory addresses. PC stores the 16-bit memory address of the next instruction to be fetched. SP can be used to temporarily store the 16 - bit memory address as well as data. So PC and SP are 16-bit registers.

09․ What is SIM?
Select interrupt mask.
Sorting interrupt mask.
Set interrupt mask.
None of these.

SIM stands for set interrupt mask which is handling the interrupts in 8085 microprocessor.

10․ The ROM programmed during manufacturing process itself is called

ROM’s are two types.
  1. Permanent ROMs
    • MROM
    • PROM
  2. Erasable ROMs
    • EPROM
    • EEPROM
The ROM programmed during manufacturing process itself is called MROM. Data is stored by the manufacturer during fabrication and user can not alter this data.