Description : Which is used to store critical pieces of data during subroutines and interrupts: (A) Stack (B) Queue (C) Accumulator (D) Data register
Last Answer : Which is used to store critical pieces of data during subroutines and interrupts: Stack
Description : The processor uses the stack to keep track of where the items are stored on it this by using the: a. Stack pointer register b. Queue pointer register c. Both a & b d. None of these
Last Answer : a. Stack pointer register
Description : By defining the _ __ register as last in first out stack the sequence can handle nested subroutines: a. S b. J ce. R d. T
Last Answer : ce. R
Description : When a subroutine is called, the address of the instruction following the CALL instructions stored in/on the a. stack pointer b. accumulator c. program counter d. stack
Last Answer : d. stack
Description : The subprogram finish the return instruction recovers the return address from the: a. Queue b. Stack c. Program counter d. Pointer
Last Answer : b. Stack
Description : In an 8085 microprocessor, the instruction CMP B has been executed while the contentsof accumulator is less than that of register B. As a result carry flag and zero flag will berespectively (A) set, reset (B) reset, set (C) reset, reset (D) set, set
Last Answer : (A) set, reset
Description : In Microprocessor one of the operands holds a special register called: a. Calculator b. Dedicated c. Accumulator d. None of these
Last Answer : c. Accumulator
Description : A storage area used to store data to a compensate for the difference in speed at which the different units can handle data is a. Memory b. Buffer c. Accumulator d. Address
Last Answer : b. Buffer
Description : A stack is a. an 8-bit register in the microprocessor b. a 16-bit register in the microprocessor c. a set of memory locations in R/WM reserved for storing information temporarily during the execution of computer
Last Answer : c. a set of memory locations in R/WM reserved for storing information temporarily during the execution of computer
Description : The stack pointer in the 8085 microprocessor is a: a) 16 bit register that points to stack memory locations b) 16 bit accumulator c) Memory location in the stack d) None of The Above
Last Answer : a) 16 bit register that points to stack memory locations
Description : In immediate addressing the operand is placed a. in the CPU register b. after OP code in the instruction c. in memory d. in stack
Last Answer : b. after OP code in the instruction
Description : A stack pointer is a. a 16-bit register in the microprocessor that indicate the beginning of the stack memory. b. a register that decodes and executes 16-bit arithmetic expression. c. The first memory location where a subroutine address is stored. d. a register in which flag bits are stored
Last Answer : a. a 16-bit register in the microprocessor that indicate the beginning of the stack memory.
Description : In 8087, _______ many register stack are there? And of _____ registers. These registers are used as _________ stack. a) 7, 40 bit, FIFO. b) 8, 60 bit, LILO. c) 8, 80 bit, LIFO d) 7, 80 bit, FILO.
Last Answer : b) 8, 60 bit, LILO.
Description : What is the store by register: a. data b. operands c. memory d. None of these
Last Answer : a. data
Description : Actual data processing operations are performed in the arithmetic logic section, but not in the …. Storage section of a processor unit a. Primary b. Accumulator c. Buffer d. Secondary
Last Answer : a. Primary
Description : How many interrupts does 8085 have, mention them
Last Answer : The 8085 has 5 interrupt signals; they are INTR, RST7.5, RST6.5, RST5.5 and TRAP
Description : Explain priority interrupts of 8085.
Last Answer : The 8085 microprocessor has five interrupt inputs. They are TRAP, RST 7.5, RST 6.5, RST 5.5, and INTR. These interrupts have a fixed priority of interrupt service. If two or more interrupts go ... 8085 is shown in the table. Interrupts Priority TRAP RST 7.5 RST 6.5 RST 5.5 INTR
Description : Interrupts which are initiated by an I/O drive are a. internal b. external c. software d. all of above
Last Answer : b. external
Description : Interrupts which are initiated by an instruction are a. internal b. external c. hardware d. software
Last Answer : d. software
Description : The number of software interrupts in 8085 is ____ a) 5 b) 8
Last Answer : b) 8
Description : What type of control pins are needed in a microprocessor to regulate traffic on the bus, in order to prevent two devices from trying to use it at the same time? a. Bus control b. Interrupts c. Bus arbitration d. Status
Last Answer : c. Bus arbitration
Description : 8086 is interfaced to two 8259s (Programmable interrupt controllers). If 8259s are in master slave configuration the number of interrupts available to the 8086 microprocessor is a) 8 b) 16 c) 15 d) 64
Last Answer : a) 8
Description : n 8086 microprocessor the following has the highest priority among all type interrupts. a) NMI b) DIV 0 c) TYPE 255 d) OVER FLOW
Last Answer : a) NMI
Description : In 8086, Example for Non maskable interrupts are a) Trapb) RST6.5 c) INTR
Last Answer : a) Trap
Description : What is meant by Maskable interrupts? a) An interrupt which can never be turned off. b) An interrupt that can be turned off by the programmer. c) none
Last Answer : b) An interrupt that can be turned off by the programmer.
Description : What are software interrupts? a) RST 0 - 7 b) RST 5.5 - 7.5 c) INTR, TRAP
Last Answer : a) RST 0
Description : What are level Triggering interrupts? a) INTR&TRAP b)RST6.5&RST5.5 c)RST7.5&RST6.5
Last Answer : b)RST6.5&RST5.5
Description : Which of the following is hardware interrupts? a) RST5.5, RST6.5, RST7.5 b) INTR, TRAP c) a & b
Last Answer : c) a & b
Description : Write A Program That Will Store The Contents Of An Accumulator And Flag Register At Locations 2000h And 2001h.?
Last Answer : Answer :By making use of the Push & Pop instructions the program can be written as: LXISP, 4000H - this step initiates the SP at 4000h. PUSH PSW - the contents of the accumulator and flag are pushed into the stack. POP B MOV A, B STA 2000H MOV A, C STA 2001H HLT
Description : When the RET instruction at the end of subroutine is executed, a. the information where the stack is iniatialized is transferred to the stack pointer b. the memory address of the RET instruction is ... two data bytes stored in the top two locations of the stack are transferred to the stack pointer
Last Answer : c. two data bytes stored in the top two locations of the stack are transferred to the program counter
Description : The data in the stack is called: a. Pushing data b. Pushed c. Pulling d. None of these
Last Answer : a. Pushing data
Description : A type of core store that has a lower access time than the devices used for working store in the same processor is known as a. Core memory b. Buffer c. Fast core d. Address register
Last Answer : d. Address register
Description : A data structure that follows the FIFO principle. a) Queue b) LL c) Stack d) Union
Last Answer : Answer: c Explanation: The answer is Stack. A stack follows the FIFO principle. FIFO stands for First In First Out This set of Tricky Computer Fundamentals Questions and Answers focuses on “Flowcharting Rules”
Description : Best-First search can be implemented using the following data structure. a) Queue b) Stack c) Priority Queue d) Circular Queue
Last Answer : c) Priority Queue
Description : Best-First search can be implemented using the following data structure A : Queue B : Stack C : Priority Queue D : Circular Queue
Last Answer : C : Priority Queue
Last Answer : A : Queue
Description : ………… is very useful in situation when data have to stored and then retrieved in reverse order. A) Stack B) Queue C) List D) Link list
Last Answer : A) Stack
Description : Which one of the following is not a linear data structure? (A) Array (B) Binary Tree (C) Queue (D) Stack
Last Answer : (B) Binary Tree
Description : What are the functions of an accumulator?
Last Answer : The accumulator is the register associated with the ALU operations and sometimes I/O operations. It is an integral part of ALU. It holds one of data to be processed by ALU. It also temporarily stores the result of the operation performed by the ALU.
Description : The contents of accumulator before CMA instruction is A5H. Its content after instructionexecution isa) A5H b) 5AH
Last Answer : b) 5AH
Description : LA stands for: a. Load accumulator b. Least accumulator c. Last accumulator d. None of these
Last Answer : a. Load accumulator
Description : Accumulator based microprocessor example are: a. Intel 8085 b. Motorola 6809 c. A and B d. None of these
Last Answer : c. A and B
Description : What is the Result of RR A instruction if accumulator contains 1000 0000. a) 0000 0001 b) 0000 0000 c) 0100 0000 d) 0000 0010
Last Answer : a) 0000 0001
Description : Which of the following instruction perform the move accumulator to external RAM of 16bit address? a) MOV @ DPTR, A b) MOVX @ Ri, A c) MOV A, @ Ri d) MOVX @ DPTR, A
Last Answer : c) MOV A, @ Ri
Description : Which of the following instruction perform as of indirect RAM to accumulator? a) MOV A, Rn b) MOV @Ri, A c) MOV A, @Ri d) MOV Rn, A
Last Answer : c) MOV A, @Ri
Description : A technique used by codes to convert an analog signal into a digital bit stream is known as a. Pulse code modulation b. Pulse stretcher c. Query processing d. Queue management
Last Answer : a. Pulse code modulation
Description : ________ is a register for Short-term, intermediate storage of arithmetic and logic data in a Computer’s CPU. A. Accumulator B. Bus C. Buffer D. None of the Above
Last Answer : A. Accumulator