8086 Microprocessor Question & AnswersJanuary 31, 2022 By WatElectronics This article lists 100 8086 Microprocessor MCQs for engineering students. All the 8086 Microprocessor Questions and Answers given below include a hint and a link wherever possible to the relevant topic. This is helpful for users who are preparing for their exams, interviews, or professionals who would like to brush up their fundamentals on 8086 Microprocessor.A microprocessor is an electronic device designed for performing data processing based on logic on an integrated circuit. It comprises of 3 main blocks as its heart for functioning namely the Arithmetic block, Logical block and control units. The data provided to the microprocessor is in digital form. They are available in different versions such as 8088, 6502, Z80, AMD Opteron 240, etc and fabricated with different bits. Among which 8086 microprocessor is a 16-bit processor designed with 40 pin DIP. 8086 has overcome the drawback of the 8085 processors in terms of address and data bits.8086 processors have 16 bits of data and 20 bits of address and ALU unit for computation purposes. 8086 is featured with 16 registers, an internal and external bus, with 5MHz frequency, 256 based vector interrupts, and built with 29000 transistors. It comprises 2 main segments BIU and EU segment, where BIU segments compromise of registers and buses, and the EU segment comprises ALU and registers. Instruction to this processor is executed in 3 stages using the pipelining concept that is in the fetch, decode and execute stage. These processors are used in traffic lights, televisions, motors, and more.1). 8086 is also called _____? iAPX86 iAPX86 AiPX80 iPX88 Hint16 bit register.2). A 8086 is a ___ device? Microprocessor Microcontroller Processor Both a and c HintIncorporates the functions of a central processing unit (CPU) onto just a few (and often only one) integrated circuits.3). A 8086 is of _____ bit chip? 4bit 8bit 12bit 16bit HintEnhance version of 8085.4). A 8086 was designed by _____? Intel Phillips Hexagon AD HintAn American multinational corporation and technology company headquartered in Santa Clara.5). Which of the following is the clock rate of 8086? 5MHz to 10 MHz 4MHz to 10 MHz 3MHz to 10 MHz 5MHz to 11 MHz HintMid range.6). Which of the following is the data width of 8086? 12 16 18 20 HintDouble of 8085 processor.7). Which of the following is the address bit of 8086? 12 16 18 20 HintEnhance address bits of 8086 10+10=?8). Which of the following is the technology node of 8086? 3 micro meter 4 micro meter 5 micro meter 6 micro meter HintMinimum value.9). ________ are the co-processors of 8086 microprocessors? Intel 8087 Intel 8089 AMD Both a and b HintNext versions of 8086.10). Which of the following type of socket is used in 8086? DIP 40 DIP 20 DIP 30 HintSimilar to 8085.11). A 8086 microprocessor is of _____ pins? 10 30 20 40 Hint20+20=?12). Which of the following is the predecessor of 8086? Intel 8085 Intel 80186 Intel 80286 Both b and c HintData width of 8 bits.13). Which of the following is the successor of 8086? Intel 8085 Intel 80186 Intel 80286 Both b and c Hint2 types.14). Which of the following is pin 0 of 8086 processor? GND VCC CLK INTR HintFirst pin in 8086.15). Which of the following is pin 19 of 8086 processor? GND VCC CLK INTR HintPositive and negative cycles.16). Which of the following is pin 40 of 8086 processor? GND VCC CLK INTR HintPower supply.17). Which of the following is pin 18 of 8086 processor? GND VCC CLK INTR HintPriority task that need to be executed on a priority by stopping current executing task.18). Which of the following is the address data bits of 8086 processor? Pin 2 to Pin 16 Pin 2 to Pin 8 Pin 2 to Pin 10 Pin 2 to Pin 12 Hint14 pins are address data bits.19). Which of the following is NMI pin of 8086? Pin 15 Pin 16 Pin 17 Pin 18 HintOdd pin number.20). Which of the following is AD15 pin of 8086? Pin 39 Pin 16 Pin 17 Pin 18 HintOdd pin number.21). Which of the following is A16 pin of 8086? Pin 39 Pin 16 Pin 38 Pin 38 HintEven pin number.22). Which of the following is A17 pin of 8086? Pin 39 Pin 16 Pin 38 Pin 37 HintOdd pin number.23). Which of the following is A18 pin of 8086? Pin 39 Pin 36 Pin 38 Pin 37 HintEven pin number.24). Which of the following is A19 pin of 8086? Pin 39 Pin 36 Pin 38 Pin 35 HintOdd pin number.25). Which of the following is S3 pin of 8086? Pin 39 Pin 36 Pin 38 Pin 35 HintEven pin number.8086 Microprocessor Interview Questions and Answers26). Which of the following is S4 pin of 8086? Pin 39 Pin 36 Pin 37 Pin 35 HintOdd pin number.27). Which of the following is S5 pin of 8086? Pin 39 Pin 36 Pin 37 Pin 35 HintEven pin number.28). Which of the following is S6 pin of 8086? Pin 39 Pin 36 Pin 37 Pin 35 HintOdd pin number.29). Which of the following is S7 pin of 8086? Pin 39 Pin 36 Pin 34 Pin 35 HintEven pin number.30). Which of the following is MN/MX(bar) pin of 8086? Pin 39 Pin 36 Pin 34 Pin 33 HintOdd pin number.31). Which of the following is RD (bar) pin in 8086 processor? Pin 30 Pin 31 Pin 32 Pin 33 HintEven pin number.32). Which of the following is HOLD signal pin in 8086 processor? Pin 30 Pin 31 Pin 32 Pin 33 HintOdd pin number.33). Which of the following is HLDA signal pin in 8086 processor? Pin 30 Pin 31 Pin 32 Pin 33 HintEven pin number.34). Which of the following is RQ (bar)/GT0(bar) signal pin in 8086 processor? Pin 30 Pin 31 Pin 32 Pin 33 HintOdd pin number.35). Which of the following is RQ (bar)/GT1(bar) signal pin in 8086 processor? Pin 30 Pin 31 Pin 32 Pin 33 HintEven pin number.36). Which of the following is LOCK (bar) signal pin in 8086 processor? Pin 30 Pin 31 Pin 29 Pin 33 HintOdd pin number.37). Which of the following is LOCK (bar) signal pin in 8086 processor? Pin 30 Pin 31 Pin 29 Pin 33 HintOdd pin number.38). Which of the following is WR (bar) signal pin in 8086 processor? Pin 30 Pin 31 Pin 29 Pin 33 HintOdd pin number.39). Which of the following is WR (bar) signal pin in 8086 processor? Pin 30 Pin 31 Pin 29 Pin 33 HintOdd pin number.40). Which of the following is S2 (bar) signal pin in 8086 processor? Pin 30 Pin 31 Pin 29 Pin 28 HintEven pin number.41). Which of the following is M/IO (bar) signal pin in 8086 processor? Pin 30 Pin 31 Pin 29 Pin 28 HintEven pin number.42). Which of the following is M/IO (bar) signal pin in 8086 processor? Pin 27 Pin 31 Pin 29 Pin 28 HintEven pin number.43). Which of the following is S1 (bar) signal pin in 8086 processor? Pin 27 Pin 31 Pin 29 Pin 28 HintOdd pin number.44). Which of the following is S0 (bar) signal pin in 8086 processor? Pin 27 Pin 31 Pin 29 Pin 26 HintEven pin number.45). Which of the following is DT/R (bar) signal pin in 8086 processor? Pin 27 Pin 31 Pin 29 Pin 26 HintOdd pin number.46). Which of the following is DEN (bar) signal pin in 8086 processor? Pin 27 Pin 31 Pin 29 Pin 26 HintEven pin number.47). Which of the following is ALE (bar) signal pin in 8086 processor? Pin 27 Pin 31 Pin 25 Pin 26 HintOdd pin number.48). Which of the following is QS0 signal pin in 8086 processor? Pin 27 Pin 31 Pin 25 Pin 26 HintOdd pin number.49). Which of the following is TEST (bar) signal pin in 8086 processor? Pin 23 Pin 24 Pin 25 Pin 26 HintOdd pin number.50). Which of the following is READY signal pin in 8086 processor? Pin 23 Pin 24 Pin 25 Pin 22 HintEven pin number.8086 Microprocessor MCQs for Exams51). Which of the following is RESET signal pin in 8086 processor? Pin 23 Pin 24 Pin 25 Pin 21 HintOdd pin number.52). A 8086 has ____ bits if I/O port? 4 6 8 10 HintMaximum value.53). A 8086 has ____ number of effective address cycles? 5 to 12 5 to 10 5 to 15 5 to 20 HintOdd and even range.54). Which of the following technology is used while fabricating 8086? HMOS CMOS NMOS PMOS HintA chip with a high density of NMOS transistors.55). Which of the following technology is used while fabricating 80C86? HMOS CMOS NMOS PMOS HintA process that uses complementary and symmetrical pairs of p-type and n-type MOSFETs for logic. Read more about CMOS.56). A microprocessor is a ____ chip? Silicon Germanium Gallium Both b and c HintAtomic number 14.57). A microprocessor comprises of ______ components? Memory Special purpose chips Software All the above Hint3 components.58). The data given to microprocessor is in ____ form? Digital Analog 0’s and 1’s Both a and c HintBinary format.59). Which of the following are the functions of microprocessor? Stores data Communicates with peripherals Performs computation All the above Hint3 functions.60). Which of the following is the main function of a microprocessor? Communicate data Store data Divide data All the above HintExchanging process.61). A 8086 type microprocessor is a _____ generation microprocessor? 1 st 2 nd 3 rd 4 th HintOdd number.62). Which of the following are the 3 rd generation microprocessor? 8086 Zilog Z8000 80960CA Both a and b Hint2 types.63). Which of the following is the fourth generation microprocessor? Motorola 88100 Intel 80960CA 8086 Both a and b Hint2 types.64). 8086 microprocessor was released in the year? 1976 1979 1989 1999 HintOdd year.65). _____ number of instructions are processed by 8086 microprocessor? 2.5 Million 2.5 Billion 2.4 Million 2.4 Billion HintHigher value.66). The clock speed of 80186 processors is ______? 5MHZ 6MHz 5 GHz 6GHz HintEven number.67). 80286 processor has clock speed of _____? 6MHz 8MHz 10MHz 12MHz HintEven number.68). ____ number of transistors are used in 80286 transistor? 134000 130000 120000 124000 HintHigher value. Read more about Transistor.69). A microprocessor is classified in to _____ types? 1 2 3 4 HintEven number. Read more about RISC and CISC.70). A 8086 microprocessor has _____ number of major units? 1 2 3 4 HintEven number.71). BIU in 8086 microprocessor stands for ____? Bus Interface Unit Bi directional Interface Unit Bus Interact Unit Both b and c Hint2 ports connector.72). EU in 8086 microprocessor stands for ____? Execution Unit Extend Unit Expand Unit Both b and c HintInstruction processed stage.73). A BIU unit 8086 processor handles ____ components in architecture? Address bus Data bus Control bus All the above Hint3 bus types.74). Which of the following is the first function of BIU in 8086? Fetching instructions from memory Finding physical address Managing pre fetched queue Storing data HintGiving input.75). Which of the following is the second function of BIU in 8086? Fetching instructions from memory Finding physical address Managing pre fetched queue Storing data HintLocating process.8086 Microprocessor Quiz Questions and Answers.76). Which of the following is the third function of BIU in 8086? Fetching instructions from memory Finding physical address Managing pre fetched queue Storing data HintHandling process data.77). A 8086 communicated data ______ way? Parallel Serial Concurrent Both a and c HintOne after the another communication.78). A 8086 has ____ byte queue of pipelining? 6 5 7 8 HintEven number.79). A BIU comprises of ____ number of segmented register? 1 2 3 4 HintEven number.80). Each segment in BIU of 8086 is of ____ bits? 8 bits 16bits 32 bits 128 bits Hint4*4=?81). Which of the following are BIU segments? Code segment Stack segment Data segment All the above Hint3 components.82). A code segment in 8086 is ____ bit? 8bit 12bit 16bit 20bit HintEnhance bits of 8086.83). A code segment holds _____ in its memory? Address of instruction Address of program Pointers All the above Hint3 segments.84). An IP pointer contains ____ address in code segment? Data offset Offset address Code Both a and b HintDenotes the number of address locations added to a base address.85). ____ segment in 8086 provides starting address of a stack? Code segment Stack segment Data segment All the above HintComprises of a contiguous array of memory locations86). Which of the following operations are used in stack segment? PUSH POP Add Both a and b Hint2 operations.87). Which of the following 8086 segment holds content in its segment? Code segment Stack segment Data segment Extra segment HintSection comprising of users data.88). ____ is the register size of data segment? 8bit 12bit 16bit 20 bit Hint8+8=?89). Which of the following 8086 segment hold additional address of starting? Code segment Stack segment Data segment Extra segment HintAdditional segment.90). An extra segment comprises of ___ strings data? Address Data Pointer Bits HintData location number in memory.91). A 6 byte based pre fetched queue in 8086 is performed during ____ operation? Decoding Executing Debugging Both a and b Hint2 operations.92). An EU in 8086 performs _____? Decoding Execution Fetching Both a and b Hint2 processes.93). The control unit comes in to action after ___ process? Fetching Pre-fetching Executing Decoding HintA process of interpreting a message sent by an addresser to an addressee.94). A control unit signals ____ components of 8086? General purpose register ALU Memory Both a and b Hint2 components.95). ALU stands for ____? Arithmetic Logic Unit Areal Log Unit Arithmetic Lead Unit Arithmetic Lag Unit HintPerforming all the mathematical operations such as add, subtract, multiply and divide and logical operations such as left shift, right shift, compare and more.96). The data from ALU is stored in ___? RAM ROM Register All the above HintRecord on an official list or directory.97). ____ holds the status of resultant generated from ALU? Flag Memory Register Timer HintA one or more data bits used to store binary values as specific program structure indicators.98). ____ is a temporary register holding temporary data? Opcode Operand Constant All the above HintAssigned values.99). Identify the operand in a+b? a,b a+ +b + HintVariables.100). Identify the opcode in a+b? a,b a+ +b + HintOperators. Time is Up! Time's up
