Microprocessor Question & Answers March 30, 2021 By WatElectronics This article lists 100+ Microprocessor MCQs for engineering students. All the Microprocessor Questions & Answers given below include a hint and wherever possible link to the relevant topic. This is helpful for the users who are preparing for their exams, interviews, or professionals who would like to brush up their fundamentals on the Microprocessor topic. The heart of a computer is a microprocessor, that is integrated on a chip with a large number of electronic components like transistors, resistors, crystals, etc. The basic components of a microprocessor are ALU its function is to perform arithmetic and logical operations on data that is received from memory or input from a user, register array contains registers like B, C, D, E, and a control unit that controls data flow and instructions. It provides different features like small chip size, cost-effective process, more versatile process, more reliable & consumes less power. Generally, these processors are microprocessors is classified based on the factors like size of data and address bus, RISC, and CISCC architecture. They are 3 types of a microprocessor Complex instruction set computer processors, reduced instruction set computer processors, and special processors. An example of microprocessors is the 8085 and 8086 processors. Some of the applications of microprocessors are ovens, washing machines, music systems, and mobile phones. 1). Microprocessor is a unit that controls ___________. Microcomputer Marco computer Input-output devices System on chip None Hint Read more about Microprocessor. 2). ALU stands for ________. Arithmetic logical unit Addition logic unit Adders logic unit None of the above None Hint 3). What is the function of ALU? Used to perform arithmetic operations Both a and b None of the above None Hint 4). Which of the following are the components of a microprocessor? ALU Register array Control unit All the above None Hint 5). Which of the following statement is related to the register array? It consist of registers like B, C, D, E, H, L It consists of an accumulator Both a and b None of the above None Hint 6). Which of the following statement is related to Accumulator? It is a storage element It performs complementing operations It performs decimal operations All the above None Hint 7). The function of the control unit is _________. It controls data flow It controls instructions in a computer It decides how computer memory, ALU unit, the input-output device should respond to the processor's instructions All the above None Hint Read more about Control Unit. 8). Which of the following sequence that a microprocessor follows? Fetch, decode, execute Fetch, execute, decode Decode, fetch, execute Execute, decode, fetch None Hint 9). Initially the microprocessors stores instructions in ______ order in a memory. Sequential manner Concurrent manner Both a and b None of the above None Hint 10). Instructions in a microprocessor, are fetched from _________. Memory ALU CPU All the above None Hint 11). Microprocessor continues to execute the instruction until it reaches _______ instruction. Start Stop Continue None of the above None Hint 12). When a microprocessor reaches a stop instruction it responds back in _______ format to the ports output. Decimal Binary 0’s and 1’s Both b and c None Hint 13). Microprocessor understands a set of instructions called ________. Instruction set Software Code All the above None Hint 14). A single instruction processes number of bits in a processor it is called ______. Instruction processor Bandwidth Clock speed Frequency None Hint 15). A number of operations processes per second by a processor is called ______. Instruction processor Bandwidth Clock speed Frequency None Hint 16). Word length depends on _______. Internal bus width Registers ALU All the above None Hint 17). A microprocessor with 8-bit can process ______ bits of data at a time. 4 8 12 16 None Hint 18). Word length in a microcomputer ranges from ______. 4 bits to 64 bits 4 bits to 128bits 16 bits to 64 bits 4 bits to 64 bytes None Hint 19). Which of the following are the data types used in a microprocessor? Binary BCD ASCII All the above None Hint 20). Binary numbers are represented in which of the following. 0’s and 1’s A to Z +1 and -1 Both a and b None Hint 21). BCD number is represented in which of the following. 0’s and 1’s 4 bits +1 and -1 Both a and b None Hint 22). ASCII stands for _______. American standard code for information interchange Alphabet standard code for information interchange American standard code for interchange information None of the above None Hint Read more about ASCII. 23). ASCII code can represent the text of which of the following data. Computers Telecommunication Other electronic devices All the above None Hint 24). Signed number is represented in which of the following. 0’s and 1’s 4 bits +1 and -1 Both a and b None Hint 25). Un-Signed number is represented in which of the following? 0’s and 1’s 4 bits +1 and -1 0 None Hint 26). Which of the following are the features of a microprocessor? Small chip size Cost-effective Is more versatile All the above None Hint 27). A microprocessor is made up of _________. Silicon Quartz Metals All the above None Hint 28). How many months does it take for a microprocessor to build? 1 month 2 months 3 months 4 months None Hint 29). A microprocessor is classified based on which of the following factors. Size of a data bus Size of an address bus RISC and CISC All the above None Hint 30). RISC type processor stands for _________. Reduced instruction set computer processor React instruction set computer processor Reduced information set computer processor None of the above None Hint Microprocessor MCQs with Answers 31). CISC type Processor stands for _______. Complex instruction set computer processor Computer instruction set computer processor Complex information set computer processor Complex instruction set complex processor None Hint 32). Microprocessors are of how many types? 2 3 4 5 None Hint Read more about RISC and CISC Processors. 33). What is the main purpose of the RISC type processor? Reduces execution time It consumes only single clock cycle Both a and b None of the above None Hint 34). Does the RISC type processor consumes more RAM memory to store instruction? Yes No Maybe None Hint 35). Choose the examples of RISC type processors. MIPS:TS(R10000) RISC type Processor Power PC: 601 DEC Alpha: 210642 All the above None Hint 36). RISC type processor uses _______ set of instruction set. Highly optimized Low optimized Optimized None of the above None Hint 37). RISC type processor architecture consists of which of the following components. Hardwired control unit Instruction cache Main memory All the above None Hint 38). RISC type processor consists of _______ instruction set. Simple Tough Equal None of the above None Hint 39). Does the RISC type processor supports different data types? Yes No Maybe None Hint 40). RISC type processor uses _____ types of addressing modes? Simple Complex Common Both a and b None Hint 41). RISC type processor uses _____ length instruction for pipelining. Fixed Variable Common Both a and b None Hint 42). RISC type processor uses ______ cycle execution time. One Two Three Four None Hint 43). Which of the following instruction in the RISC type processor access memory location? LOAD instruction STORE instruction Transfer instruction Both a and b None Hint 44). RISC type processor contains ______ number of processors. 2 3 Many Few None Hint 45). RISC type processor contains _______ number of transistors. 2 3 Large Few None Hint 46). CISC type processor is designed` to _______ number of instruction per program. Maximize Minimize Zero None of the above None Hint 47). What is the function of a compiler? It translates high-level language into machine code It translates high-level language into assembly-level language Both a and b It translates low-level language into a high-level language None Hint 48). CISC type processor uses _____ amount of RAM. Large Small Equal None of the above None Hint 49). Which of the following is the CISC type processor? IBM 370/168 VAX 11/780 Intel 80486 All the above None Hint 50). Which of the following are the components of a CISC type processor? Control unit Cache Main memory All the above None Hint 51). CISC type processor has ______ type of addressing modes. Few One Various Zero None Hint 52). CISC type processor uses _______ number of instructions. Less Large Zero None of the above None Hint 53). In a CISC type processor, instruction decoding logic is _______. Simple Complex Fragile None of the above None Hint 54). How many instructions are required to support multiple addressing modes? 1 2 3 4 None Hint 55). What is the purpose of designing a special processor? It is designed for special purpose It is designed for dual purpose It is designed to simplify complexity None of the above None Hint 56). Which of the following are types of special processors? Math processor Input-output processor Transputer All the above None Hint 57). Which of the following are the examples of math coprocessor? 8087- used with 8086 80287 used with 80286 80387 used with 80386 All the above None Hint 58). A coprocessor handles a particular function ____ than a microprocessor. Slower Faster Moderate Any of the above None Hint 59). Which of the following are the examples of input/output processors? DMA processor Keyboard/ mouse controller Graphic display controller All the above None Hint 60). DMA stands for? Direct memory access Direction memory access Dictate memory accumulator None of the above None Hint Microprocessor Interview Questions & Answers 61). Which of the following is the special feature of the IO processor? It has its own local memory It controls I/O devices with min CPU involvement Both a and b None of the above None Hint 62). The word transputer is also called _______. Transistor computer Transact computer Transistor component None of the above None Hint 63). A transputer has ________ memory. Own local External Both a and b Any of the above None Hint 64). A transputer was designed in ________ year. 1980 1979 1890 1888 None Hint 65). Which of the following statement matches the transputer? It is used as a single processor It connects to external links It improves performance All the above None Hint 66). Which of the following are the examples of transputers? 16bit T212 32 bit T425 T800 All the above None Hint 67). DSP in DSP processor stands for ________. Digital signal processor Digital sign processor Digital signal pin None of the above None Hint 68). DSP processor processes _________. Analog signal to digital signal Digital signal to analog signal Analog signal to analog signal Digital signal to digital signal None Hint 69). ADC process in a DSP processor is done by _______. Voltage level sampling at periodic intervals of time and converting this voltage level at that instant into digital form Voltage level sampling at aperiodic intervals of time and converting this voltage level at that instant into digital form Voltage level sampling at periodic intervals of time and converting current level at that instant into digital form None of the above None Hint 70). Which of the following are the components of the DSP processor? Program memory Data memory Compute engine All the above None Hint 71). What is the purpose of program memory in a DSP processor? It records the programs It will use stored programs to process data Both a and b None of the above None Hint 72). What is the purpose of data memory in a DSP processor? It stores information to be processed It will use stored programs to process data Both a and b None of the above None Hint 73). What is the purpose of compute engine in a DSP processor? It performs math operation It will use stored programs to process data Both a and b None of the above None Hint 74). What is the purpose of input/output in a DSP processor? It communicates with the external world It will use stored programs to process data Both a and b None of the above None Hint 75). Which of the following are the applications of DSP processors? AV compression 2D / 3D graphics acceleration Music synthesis All the above None Hint 76). Which of the following are the examples of DSP processor? TMS 320C40 TMS320C50 Both a and b None of the above None Hint 77). Which of the following is a microprocessor? 8085 8086 8051 Both a and b None Hint 78). 8085 is a ______ bit microprocessor. 8 bit 16 bit 32 bit All the above None Hint Read more about 8085 Microprocessor. 79). 8085 is designed by ________. Intel ADM Microsoft None of the above None Hint 80). 8085 microprocessor has ________ bits of data bus. 8 bits 16 bits 32 bits 48 bits None Hint 81). 8085 microprocessor has _____ bits of address bus? 8 bits 16 bits 32 bits 48 bits None Hint 82). 8085 microprocessor has ________ bits of program counter. 8 bits 16 bits 32 bits 48 bits None Hint 83). 8085 microprocessor has ______ bits of stack pointer. 8 bits 16 bits 32 bits 48 bits None Hint 84). 8085 microprocessor has six _______ bits of registers. 8 bits 16 bits 32 bits 48 bits None Hint 85). Which of the following are the register pair in the 8085 microprocessor? BC DE HL All the above None Hint 86). Which of the following are the applications of the 8085 processor? Washing machine Ovens Mobiles All the above None Hint 87). Which of the following are the functional units of the 8085 processor? Accumulator ALU General purpose register All the above None Hint 88). What is the purpose of temporary registers in 8085? It holds the data It retrieves the data It captures the data It holds data on a temporary basis None Hint 89). How many flipflops are there in a flag register of 8085. 4 5 6 7 None Hint Read more about Flip-Flops. 90). Which of the following are control signals of the 8085 processor? READY, RD, WR, ALE S0, S1, IO/M HOLD, HLDA RESET None Hint Microprocessor Exam Questions & Answers 91). Which of the following are status signals of the 8085 processor? READY, RD, WR, ALE S0, S1, IO/M HOLD, HLDA RESET None Hint 92). Which of the following are DMA signals of the 8085 processor? READY, RD, WR, ALE S0, S1, IO/M HOLD, HLDA RESET None Hint 93). Which of the following are RESET signals of the 8085 processor? READY, RD, WR, ALE S0, S1, IO/M HOLD, HLDA RESET IN, RESET OUT None Hint 94). What is the function of the RESET IN signal? It resets input function It resets output function It resets both input and output function None of the above None Hint 95). What is the function of the RESET OUT signal? It resets input function It resets output function It resets both input and output function None of the above None Hint 96). Which of the following are interrupt signals in the 8085 processor? INTR RST 7.5 RST 6.5 All the above None Hint 97). What is the purpose of serial input/output control? It controls serial data communication It controls parallel data communication Both a and b None of the above None Hint 98). Data bus in 8085 is _______ directional. Unidirectional Bi-directional Tri directional Multi-directional None Hint 99). Data bus in 8085 is used for ______. Storing data Carrying data Manipulating data None of the above None Hint 100). Address bus in 8085 is used for _________. Storing data Holds the location of data address Manipulating data None of the above None Hint 101). 8086 microprocessor supports _____ bits of ALU. 4 bit ALU 8 bit ALU 16 bit ALU 32 bit ALU None Hint 102). Which of the following are the types of registers in the 8086 microprocessor? General-purpose registers Segment registers All of the above None None Hint 103). 8086 can operate in ______ modes. 1 2 3 4 None Hint 104). Name the modes in which 8086 performs operations. Minimum mode and maximum mode Maximum mode Minimum mode Operating mode None Hint 105). How much power supply does 8086 need to perform operations? 4v 3v 2v + 5v None Hint 106). What is the full form of HMOS? High-Speed Metal Oxide Semiconductor High speed metal High speed oxides None None Hint 107). 8086 uses ______ channel HMOS microprocessor. P-channel N- Channel Both a and b None None Hint 108). What are the different types of flags in 8086? Status flag and control flag Directional flag, interrupt flag, trap flag Auxiliary carry flag, overflow flag, Parity flag, Sign flag Zero flag, All of the above None Hint 109). What is a bidirectional data bus? Data flow in both directions Data flow in one direction Data flow in multiple directions None None Hint 110). What is the size of the address bus and data bus in the 8086 processor? 16bits 20bits Both a and b None None Hint 111). What is the use of addressing mode in 8086 microprocessor? To calculate the operands effective memory address To calculate the address of an operand To calculate the direct address of an operand None None Hint 112 ). Which type of package of 8086 microprocessor? Dual inline package Single line package Multithreaded package All of the above None Hint 113). What is the use of zero flags in the 8086 microprocessor? Use to check the result of arithmetic operation Use to check the result of bitwise logical operation Both a and b None None Hint 114). Does the 8086 processor has multiplication and division instructions? No Only multiplication Both multiplication and division instructions Only Division None Hint 115). What are the operating frequencies of the 8086 microprocessor? 5 MHz 8 MHz 10 MHz All of the above None Hint 116). Which type of technology used in the manufacturing of the 8086 microprocessor? HMOS technology NMOS technology PMOS technology Semiconductor technology None Hint 117). What are the characteristics of the flag register in 8086? Special purpose register 16 bit flag register Flag bit changed to 0/ 1 after arithmetic and logic operation All the above None Hint 118). Zero flag is a ______ bit flag of 8086 processor. 1 bit 3 bit 6 bit 16bit None Hint 119). What is the purpose of zero flags in the 8086 processor? Checks the arithmetic operation Checks the logical operation Includes bitwise logical instructions Both a and c None Hint 120). 8086 is a _________. Microprocessor Microcontroller Both a and b None None Hint 121). 8051 is a ________. Microprocessor Microcontroller Both a and b None None Hint Related MCQ's 8085 Microprocessor Questions & Answers 8086 Microprocessor Questions & Answers Time's up
