Which register holds the current instruction to be executed.

a. Instruction register
b. Program register 9
Control register
a
None of these

1 Answer

Answer :

a. Instruction register

Related questions

Description : Which register holds the next instruction to be executed:

Last Answer : c. Program control register

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 : The instruction read from memory is then placed in the ___and contents of program counter is __ so that it contains the address of_ __ instruction in the program. a. Program counter, ... incremented and previous c. Instruction register, incremented and next d. Address register, decremented and next

Last Answer : c. Instruction register, incremented and next

Description : In which addressing the operand is actually present in instruction: a. Immediate addressing b. Direct addressing 9 Register addressing a None of these

Last Answer : a. Immediate addressing

Description : Acontrol memory is__ stored in some area of memory: a. Control instraction b. Memory instruction c. Register instruction d. None of these

Last Answer : a. Control instraction

Description : Which is the input of control unit: a. Master clock signal b. Instruction register c. Flags d. Control signals from bus e. Allof these

Last Answer : e. Allof these

Description : is the step during which the operations specified by the instruction are executed: a. Execute b. Decode c. Both a& b d. None of these

Last Answer : a. Execute

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 : Each instruction is executed by set of micro operations termed as. a. Micro instructions b. Mini instructions c. Botha &b d. None of these

Last Answer : a. Micro instructions

Description : Which types of jump keeps a 2_byte instruction that holds the range from- 128to127 bytes in the memory location: a. Far jump b. Near jump ce. Short jump d. __ Allof these

Last Answer : ce. Short jump

Description : Which register holds the item that is to be written into the stack or read out of the stack: a. SR b. IR Cc. RR d DR

Last Answer : d DR

Description : In which mode the main memory location holds the EA of the operand: a. Immediate addressing b. Direct addressing c. Register addressing d. Indirect addressing

Last Answer : d. Indirect addressing

Description : Which types of register holds a single vector containing at least two read ports and one write ports: a. Data system b. Data base Cc. Memory d. Vector register

Last Answer : d. Vector register

Description : Opcode is the machine instruction obtained from decoding instruction stored in. a. Stack pointer b. Address pointer Cc. Instruction register d. Incrementer

Last Answer : Cc. Instruction register

Description : Which are contains one or more register that may be referenced by machine instruction: a. Input b. Output c. CPU d. ALU

Last Answer : c. CPU

Description : The register which keeps track of the execution of a program and which contains the memory address of the instruction currently being executed is known as: a) Index Register b) Memory Address Register c) Program Counter d) None of The Above

Last Answer : c) Program Counter

Description : In program control the instruction is set for the statement in a: a. Parallel b. Sequence c. Both d. None

Last Answer : b. Sequence

Description : Who change the address in the program counter and cause the flow of control to be altered: a Shift manipulation b. Circular manipulation c. Program control instruction d. __ Allof these

Last Answer : c. Program control instruction

Description : Which control refers to the track of the address of instructions. a. Data control b. Register control c. Program control d. None of these

Last Answer : c. Program control

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

Last Answer : a. Instruction register

Description : The register which holds the address of the location to or from which data are to be transferred is known as_______ A. Instruction Register B. Control register C. Memory Address Register D. None of the Above

Last Answer : C. Memory Address Register

Description : The contents of the program counter isthe __——__—oof the instruction to be run. a. Data b. Address c. Counter d. None of these

Last Answer : b. Address

Description : In second pass, assembler creates _ in binary format for every instruction in program and then refers to the symbol table to giving every symbol an_ _ relating the segment. a. Code and program b. Program and instruction c. Code and offset d. All of these

Last Answer : c. Code and offset

Description : To design a program it requires __ os a. Program specification b. Code specification c. Instruction specification d. Problem specification

Last Answer : a. Program specification

Description : Call instruction is written inthe ss program. a. Main b. Procedures c. Program d. Memory

Last Answer : a. Main

Description : Return instruction is written in_ to written to main program: a. Subroutine b. Main program c. Botha &b d. None of these

Last Answer : a. Subroutine

Description : When subroutine is called contents of program counter is location address of __ instruction following call instruction is stored on _ __and program execution is transferred to __ address. a. Non ... , Stack and Main program Cc. Executable, Queue and Subroutine d. Executable, Stack and Subroutine

Last Answer : d. Executable, Stack and Subroutine

Description : Before checking the program for errors in translating code into machine language the high level language code is loaded into __ a. Register b. Memory c. Data d. CPU

Last Answer : b. Memory

Description : Various machine level components are: a. Address register > Program counter c Data register d. Accumulator register e. Memory of 2K,16 bits/word RAM f. Multiplexers g. Allof these

Last Answer : g. Allof these

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 addressing is an extremely influential way of addressing: a. Displacement addressing b. Immediate addressing 9 Direct addressing a Register addressing

Last Answer : a. Displacement addressing

Description : Which is the method by which instructions are selected for execution: a. Instruction selection b. — Selection control c. Instraction sequencing d. All of these

Last Answer : c. Instraction sequencing

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 : Which unit is necessary for the execution of instruction: a. Timing b. Control ce. Both d. None of these

Last Answer : ce. Both

Description : One of use of microprogramming to implement _ ____ of processor in Intel 80x86 and Motorola 680x0 processors whose instruction set are evolved from 360 original. a. Control structure b. Without control c. Control unit d. Only control

Last Answer : c. Control unit

Description : Which microinstruction provide next instruction from control memory: a. Microinstruction execution b. Microinstruction Buffer c. Microinstruction decoder d. Microinstraction Sequencing

Last Answer : d. Microinstraction Sequencing

Description : Outputs of instruction/data path in CU are. a. Reg R/W b. Load/Reg-Reg c. ALU function select d. Load control e. Read control f. IR Latch g. JUMP/Branch/Next PC h_ = All of these

Last Answer : h_ = All of these

Description : Decoding of an instruction in RISC architecture means decision on working of control unit for: a. Remainder of instructions b. _ Divisor of instructions c. Dividend of instructions d. None of these

Last Answer : a. Remainder

Description : is an external hardware event which causes the CPU to interrupt the current instruction sequence: a. Input interrupt b. Output interrupt c. Both d. None of these

Last Answer : c. Both

Description : In every transfer, selection of register by bus is decided by: a. Control signal b No signal c. All signal d. Allof above

Last Answer : a. Control signal

Description : Addresses in control memory is made by for each register group: a. Address select logic b. Data select logic c. Control select logic d. All of these

Last Answer : a. Address select logic

Description : There are how many register groups in control memory: a 3 b 5 c. 6 d 8

Last Answer : b 5

Description : five bits of OPR select one of the operation inthe __ in control register. a. CPU b. RISC ec ALU d. MUX

Last Answer : ec ALU

Description : In register stack a stack can be a finite number of a Control word b. Memory word c Transfer word d. — Allof these

Last Answer : b. Memory word

Description : statement block is executed atleast once for any value of the condition. a. For statement b. Do-while statement c. While statement d. None of these

Last Answer : b. Do-while statement

Description : _is sequence of instructions is executed and repeated any no. of times in loop until logical condition is true: a. Iteration b. Repetition c Botha&b d. None of these

Last Answer : c Botha&b

Description : When a subroutine is the parameters are loaded onto the stack and SCAL is executed: a. Executed b. Invoked c. Ended d. = Started

Last Answer : b. Invoked

Description : getchar :: IO char in this given function what is indicated by IO char: a. when getchar is invoked it returns a character b. when getchar is executed it returns a character c. botha & b d. none of these

Last Answer : a. when getchar is invoked it returns a character

Description : Which section is basically a sequence of instruction with a clear indication of beginning and end for updating shared variables. a. Racing section b. Critical section c. d. Both None of thes

Last Answer : . Critical sectio