Description : Pipeline implement a. fetch instruction b. decode instruction c. fetch operand d. calculate operand e. execute instruction f. all of abve
Last Answer : f. all of abve
Description : Who is the represents the fundamental process in the operation of the CPU: a. The fetch-execute cycle and pipelining b. The assembly c. Both A and B d. None of these
Last Answer : a. The fetch-execute cycle and pipelining
Description : How can we make computers work faster? a. The fetch-execute cycle and pipelining b. The assembly c. Both A and B d. None of these
Description : Why do dogs like to fetch? And why sticks? There have been questions about generalities, e.g. lately. My dog loves fetching sticks; a total dog stereotype. Why?
Last Answer : perhaps it is the feel in the mouth and the ease of grabbing it. Balls are a bit harder, especially for small mouth boogers. Maybe they like that a stick doesnt bounce. They are more in charge.
Description : The fetch-execute cycle is to use a system know as: a. Assembly line b. Pipelining c. Cache d. None of these
Last Answer : b. Pipelining
Description : The necessary steps carried out to perform the operation of accessing either memory or I/O Device, constitute a ___________________ a) fetch operation b) execute operation c) machine cycle
Last Answer : c) machine cycle
Description : In 8085 microprocessor, how many T-states does OPCODE FETCH machine cycle normally require (i.e., when HOLD and WAIT signals are NOT forced)? A) 4 to 6 B) 3 to 8 C) 2 to 3 D) 8 to 12
Last Answer : In 8085 microprocessor, how many T-states does OPCODE FETCH machine cycle normally require (i.e., when HOLD and WAIT signals are NOT forced)? A) 4 to 6 B) 3 to 8 C) 2 to 3 D) 8 to 12
Description : The status register is also called the____: a. Condition code register b. Flag register c. A and B d. None of these
Last Answer : c. A and B
Description : __is the sequence of operations performed by CPU in processing an instruction: a. Execute cycle b. Fetch cycle c. Decode d. Instruction cycle
Last Answer : d. Instruction cycle
Description : Which cycle refers to the time period during which one instruction is fetched and executed by the CPU: a. Fetch cycle b. Instruction cycle c. Decode cycle d. Execute cycle
Last Answer : b. Instruction cycle
Description : A CPU handles interrupt by executing interrupt service subroutine................. (A) by checking interrupt register after execution of each instruction (B) by checking interrupt register ... cycle (C) whenever an interrupt is registered (D) by checking interrupt register at regular time interval
Last Answer : (A) by checking interrupt register after execution of each instruction
Description : Micro-orders generate the_ __ address of operand and execute instruction and prepare for fetching next instruction from the main memory: a. Physical b. Effective c. Logical d. all of above
Last Answer : b. Effective
Description : Define instruction cycle, machine cycle and T-state
Last Answer : Instruction cycle is defined, as the time required completing theexecution of an instruction. Machine cycle is defined as the time required completing one operation of accessing memory, I/O or ... request. Tcycle is defined as one subdivision of the operation performed in one clock period
Description : Steps involved to fetch a byte in 8085
Last Answer : i. The PC places the 16-bit memory address on the address bus ii. The control unit sends the control signal RD to enable the memory chip iii. The byte from ... byte is placed in the instruction decoder of the microprocessor and the task is carried out according to the instruction
Description : The secondary storage devices can only store data but they cannot perform a. Arithmetic Operation b. Logic operation c. Fetch operations d. Either of the above
Last Answer : d. Either of the above
Description : To locate a data item for storage is a. Field b. Feed c. Database d. Fetch
Last Answer : d. Fetch
Description : A DMA controller transfers 32-bit words to memory using cycle Stealing. The words are assembled from a device that transmits characters at a rate of 4800 characters per second. The CPU is fetching and executing instructions at an average ... of the DMA transfer? (A) 0.06% (B) 0.12% (C) 1.2% (D) 2.5%
Last Answer : Answer: B
Description : ISA stands for: a. Instruct set area b. Instruction set architecture c. Both a and b d. None of these
Last Answer : b. Instruction set architecture
Description : Instruction in computer languages consists of a. OPCODE b. OPERAND c. Both of above d. None of above
Last Answer : c. Both of above
Description : In which register instruction is decoded prepared and ultimately executed: a. Instruction register b. Current register c. Both a and b d. None of these
Last Answer : a. Instruction register
Description : _______ Stores the instruction currently being executed: a. Instruction register b. Current register c. Both a and b d. None of these
Description : The time required to complete one instruction is called. a. Fetch time b. Execution time c. Control time d. All of these
Last Answer : b. Execution time
Description : _is the step during which a new instruction is read from the memory: a Decode b. Fetch c. Execute d. None of these
Last Answer : b. Fetch
Description : The instruction fetch operation is initiated by loading the contents of program counter into the and sends _ request to memory: a. Memory register and read b. Memory register and write c. Data register and read d. Address register and read
Last Answer : d. Address register and read
Description : How does the microprocessor differentiate between data and instruction
Last Answer : When the first m/c code of an instruction is fetched and decoded in the instruction register, the microprocessor recognizes the number of bytes required to fetch the entire ... will be considered as data & the byte after the data will be treated as the next instruction.
Description : Why do we use XRA A instruction
Last Answer : The XRA A instruction is used to clear the contents of the Accumulator and store the value 00H.
Description : Explain the different instruction formats with examples
Last Answer : The instruction set is grouped into the following formats • One byte instruction MOV C,A • Two byte instruction MVI A,39H • Three byte instruction JMP 2345H
Description : Mention the categories of instruction and give two examples for each category
Last Answer : The instructions of 8085 can be categorized into the following five • Data transfer MOV Rd,Rs STA 16-bit • Arithmetic ADD R DCR M • Logical XRI 8-bit RAR • Branching JNZ CALL 16-bit • Machine control HLT NOP
Description : What is an instruction?
Last Answer : An instruction is a binary pattern entered through an input device to command the microprocessor to perform that specific function
Description : Explain the difference between a JMP instruction and CALL instruction.
Last Answer : A JMP instruction permanently changes the program counter. A CALL instruction leaves information on the stack so that the original program execution sequence can be resumed.
Description : How many operations are there in the instruction set of 8085 microprocessor?
Last Answer : There are 74 operations in the 8085 microprocessor.
Description : CISC stands for: a. Complex instruction set computer b. Camper instruct set of computer c. Compared instruction set computer d. None of these
Last Answer : a. Complex instruction set computer
Description : RISC stands for: a. Reduced Instruction set computer b. Reduced Instruct set compare c. Reduced instruction stands computer d. All of these 107. DEC stands for:
Last Answer : a. Reduced Instruction set computer
Description : Which is not the main feature of DEC Alpha: a. 64 Bit RISC processor b. Designed to replace 32 VAX(CISC) c. Seven stage split integer/floating point pipeline d. Variable Instruction length
Last Answer : d. Variable Instruction length
Description : How many speed of 8088,8085,8086 microprocessor: a. 2.5 Million instruction per second b. 1.5 Million instruction per second c. 3.5 Million instruction per second d. 1.6 Million instruction per second
Last Answer : a. 2.5 Million instruction per second
Description : Which is most commonly measured in terms of MIPS previously million instruction per second: a. Microprocessor b. Performance of a microprocessor c. Assembly line d. None of thes
Last Answer : b. Performance of a microprocessor
Description : RISC stands for: a. Reduced Instruction Set Computer b. Reduced Intergraded Set Computer c. Resource Instruction Set Computer d. Resource Instruction System Computer
Last Answer : a. Reduced Instruction Set Computer
Description : CISC stands for: a. Complex Instruction System Computer b. Complex Instruction Set Car c. Complex Instruction Set Computer d. None of these
Last Answer : c. Complex Instruction Set Computer
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 : 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 : Interrupts which are initiated by an instruction are a. internal b. external c. hardware d. software
Last Answer : b. external
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 : What is the control unit's function in the CPU? a. To transfer data to primary storage b. to store program instruction c. to perform logic operations d. to decode program instruction
Last Answer : b. to store program instruction
Last Answer : d. software
Description : Pipelining strategy is called implement a. instruction execution b. instruction prefetch c. instruction decoding d. instruction manipulation
Last Answer : b. instruction prefetch
Description : Which of the following registers is used to keep track of address of the memory location where the next instruction is located? a. Memory Address Register b. Memory Data Register c. Instruction Register d. Program Register
Last Answer : d. Program Register
Description : 8253, 8257 c) 8257,8251 d)8251,825721.Consider the following set of 8085 instruction.MVI A,82HORA AJP DSPLYXRA ADSPLY:OUT PORT1HLT.The output at PORT1 isa) 00H b) FFH c) 92H d) 11H
Last Answer : a) 00H
Description : The contents of accumulator before CMA instruction is A5H. Its content after instructionexecution isa) A5H b) 5AH
Last Answer : b) 5AH
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 : Which of the following registers is used to keep track of address of the memory location where the next instruction is located? a. Memory address register b. Memory data register c. Instruction register d. Program counter
Last Answer : d. Program counter