Description : The load instruction is mostly used to designate a transfer from memory to a processor register known as_________ A. Accumulator B. Instruction Register C. Program counter D. Memory address Register
Last Answer : A. Accumulator
Description : A group of bits that tell the computer to perform a specific operation is known as_______ A. Instruction code B. Micro-operation C. Accumulator D. Register
Last Answer : A. Instruction code
Description : The act of writing new data into register (1) is possible only when the register is an accumulator (2) is possible only when the register is an accumulator or instruction register (3) erases the previous contents of the register (4) is non-destructive to existing contents
Last Answer : is possible only when the register is an accumulator or instruction register
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 : 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 : Single address computer instruction has two parts: a. The operation code b. The operand c. A and B d. None of these
Last Answer : c. A and B
Description : The ___________ contains the address of the next instruction to be executed. a) IR b) PC c) Accumulator d) System counter
Last Answer : Answer: b Explanation: PC stands for program counter (It contains the address of the next instruction to be executed)
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
Description : What the Difference between accumulator and instruction register 8080?
Last Answer : Examples: /360: no accumulator 8080: A 6800: A and B 8086: AX ...
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 : 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 : An instruction code must specify the address of the__. a. Opecode b. Operand c. Both d. None
Last Answer : b. Operand
Description : Instruction in computer languages consists of A) OPCODE B) OPERAND C) Both of above D) None of above
Last Answer : Answer : C
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 : 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 : In which addressing mode the operand is given explicitly in the instruction? A. Absolute B. Immediate C. Indirect D. Direct
Last Answer : B. Immediate
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 : 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 : Answer : D
Description : Which of the following registers is loaded with the contents of the memory location pointed by the PC? A) Memory address registers B) Memory data registers C) Instruction register D) Program counter
Description : Content of the program counter is added to the address part of the instruction in order to obtain the effective address is called_______ A. relative address mode. B. index addressing mode. C. register mode. D. implied mode.
Last Answer : A. relative address mode.
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 decoded instruction is stored in ______ (A) Register (B) Memory Address Register(MAR) (C) Instruction Register(IR) (D) None of the Above
Last Answer : (C) Instruction Register(IR)
Description : Which registers can interact with secondary memory? (A) Register (B) Memory Address Register(MAR) (C) Instruction Register(IR) (D) None of the Above
Last Answer : (B) Memory Address Register(MAR)
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 : The ________ ensures that only one IC is active at a time to avoid a bus conflict caused by two ICs writing different data to the same bus.A.control busB.control instructionsC. address decoder D.CPU
Last Answer : C. address decoder
Description : Instruction in computer languages consists of a. OPCODE b. OPERAND c. Both of above d. None of above
Last Answer : Both of above
Last Answer : c. Both of above
Description : Main storage is also called A) Accumulator B) Control Unit C) Register Unit D) Memory
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 : Two important fields of an instruction are. a. Opcode b. Operand c. Only a d. Botha&b
Last Answer : d. Botha&b
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 : In the early stages of development of the internet protocol, network administrators interpreted an IP address in ____parts: a) Network Number Portion b) Host Number Portions c) Both of Above d) None of These
Last Answer : c) Both of Above
Description : Which of the following statement is true? i) An address with all bits 1 is interpreted as all networks or allhosts. ii) The class A network 128.0.0.0 is defined as the loopbacknetwork. A) i only B) ii only C) Both A and B D) None of the above
Last Answer : A) i only
Description : In which addressing the simplest addressing mode where an operand is fetched from memory is a. Immediate addressing b. Direct addressing c. Register addressing d. None of these
Last Answer : b. Direct addressing
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 one of the following is not an addressing mode? (A) Register indirect (B) Auto increment (C) Relative indexed (D) Immediate operand
Last Answer : (C) Relative indexed
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 : 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 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 : Program counter
Description : Which of the following registers is loaded with the contents of the memory location pointed by the PC? a. Memory address registers b. Memory data registers c. Instruction register d. Program counter
Last Answer : Instruction register
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
Last Answer : d. Program counter
Description : Which of the following registers is loaded with the contents of the memory location pointed by the PC? a. Memory address register b. Memory data register c. Instruction registers d. Program counter
Last Answer : c. Instruction registers
Last Answer : c. Instruction register
Description : The advantage of ............... is that it can reference memory without paying the price of having a full memory address in the instruction. (A) Direct addressing (B) Indexed addressing (C) Register addressing (D) Register Indirect addressing
Last Answer : (D) Register Indirect addressing