Description : Computer instructions written with the use of English words instead of binary machine code is called A) Mnemonics B) Symbolic code C) Gray codes D) Opcode
Last Answer : Answer : B
Description : Computer instructions written with the use of English words instead of binary machine code is called a. Mnemonics b. Symbolic code c. Gray codes d. Opcode
Last Answer : b. Symbolic code
Description : Instructions and memory address are represented by a. Character code b. Binary codes c. Binary word d. Parity bit
Last Answer : b. Binary codes
Description : A microprogram written as string of 0's and 1's is a a. symbolic microinstruction b. binary microinstruction c. symbolic microprogram d. binary microprogram
Last Answer : b. binary microinstruction
Description : Find out the incorrect feature of Assembly language among following: a) It is also provided by the manufacturer b) One instruction for each computer operation c) Instruction codes are represented by mnemonics ... be assembled into machine language for execution d) All of the Above e) None of These
Last Answer : e) None of These
Description : The proper definition of a modern digital computer is a. An electronic automated machine that can solve problems involving words and numbers b. A more sophistic and modified electronic pocket calculator c. Any machine that can perform mathematical operations d. A machine that works on binary code
Last Answer : d. A machine that works on binary code
Description : In which language is source program written? a. English b. Symbolic c. High level d. Temporary
Last Answer : c. High level
Description : Mnemonic refers to. a Instructions b. Code c. Symbolic codes d Assembler
Last Answer : c. Symbolic codes
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 : 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 : The symbols used in an assembly language are (1) Codes (2) Mnemonics (3) Assembler (4) Machine codes
Last Answer : Mnemonics
Description : Instructions and memory address are represented by A) Character code B) Binary codes C) Binary word D) Parity bit
Last Answer : Binary codes
Description : What is an Opcode?
Last Answer : The part of the instruction that specifies the operation to be performed is called the Operation code or opcode.
Description : The operation is specified by a binary code known as the a. Operand code b. Opcode c. Source code d. — Allof these
Last Answer : b. Opcode
Description : A computer program that translates one program instructions at a time into machine language is called a/an a. Interpreter b. CPU c. Compiler d. Simulator
Last Answer : a. Interpreter
Description : A computer language that is written in binary codes only is _____ a) machine language b) C c) C# d) pascal
Last Answer : Answer: a Explanation: Machine Language is written in binary codes only . It can be easily understood by the computer and is very difficult for us to understand. A machine language , unlike other languages requires no translators or interpreters
Description : BASIC stands for: a) Basic Access towards Skills in Computer b) Beginner's All Purpose Symbolic Instruction Code c) Binary And Specific Instruction Code d) None of These
Last Answer : b) Beginner's All Purpose Symbolic Instruction Code
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 : Symbolic logic was discovered by a. George Boole b. Herman Hollerith c. Van Neumann d. Basic Pascal
Last Answer : a. George Boole
Description : EBCDIC stands for a. Extended Binary Coded Decimal Interchange Code b. Extended Bit Code Decimal Interchange Code c. Extended Bit Case Decimal Interchange Code d. Extended Binary Case Decimal Interchange Code
Last Answer : a. Extended Binary Coded Decimal Interchange Code
Description : The process of starting a or restarting a computer system by loading instructions from a secondary storage device into the computer memory is called a. Duping b. Booting c. Padding d. CPS
Last Answer : b. Booting
Description : The instructions for starting the computer are house on a. Random access memory b. CD-Rom c. Read only memory chip
Last Answer : c. Read only memory chip
Description : The proper definition of a modern digital computer is A) An electronic automated machine that can solve problems involving words and numbers B) A more sophistic and modified electronic pocket calculator C) Any machine that can perform mathematical operations D) A machine that works on binary code
Last Answer : Answer : A
Last Answer : A machine that works on binary code
Description : A source program is the progam written in which of the following language: a) Symbolic b) Machine c) High Level d) None of These
Last Answer : c) High Level
Description : In which language is source program written? A) English B) Symbolic C) High level D) Temporary
Last Answer : Answer : C
Description : How to convert Binary to Gray Code
Last Answer : Ans-Take XOR of binary no. starting from right with the next bit. Add 0 as leftmost bit to get answer eg. Â 111=7 gray code 0 xor 1,1 xor 1, 1 xor 1 i.e. 100 ans.
Description : The code where all successive numbers differ from their preceding number by single bit is (A) Binary code. (B) BCD. (C) Excess – 3. (D) Gray.
Last Answer : Ans: D The code where all successive numbers differ from their preceding number by single bit is Gray Code. (It is an unweighted code. The most important characteristic of this code is that only a single bit change occurs when going from one code number to next.)
Description : What is the Gray code word for the binary number 101011? (1) 101011 (2) 110101 (3) 011111 (4) 111110
Last Answer : What is the Gray code word for the binary number 101011? (1) 101011 (2) 110101 (3) 011111 (4) 111110
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 : One of the main feature that distinguish microprocessors from micro-computers is a. Words are usually larger in microprocessors b. Words are shorter in microprocessors c. Microprocessor does not contain I/O devices d. Exactly the same as the machine cycle time
Last Answer : c. Microprocessor does not contain I/O devices
Description : Define stack and explain stack related instructions
Last Answer : The stack is a group of memory locations in the R/W memory thatis used for the temporary storage of binary information during the execution of the program. The stack related instructions are PUSH & POP
Description : Explain LDA, STA and DAA instructions
Last Answer : LDA copies the data byte into accumulator from the memory location specified by the 16-bit address. STA copies the data byte from theaccumulator in the memory location specified by 16-bit address. DAA changes the contents of the accumulator from binary to 4-bit BCD digits.
Description : List the four instructions which control the interrupt structure of the 8085 microprocessor.
Last Answer : • DI ( Disable Interrupts ) • EI ( Enable Interrupts ) • RIM ( Read Interrupt Masks ) • SIM ( Set Interrupt Masks )
Description : What is the difference between the shift and rotate instructions?
Last Answer : A rotate instruction is a closed loop instruction. That is, the data moved out at one end is put back in at the other end. The shift instruction loses the data that is moved out of the last bit locations.
Description : Explain the purpose of the I/O instructions IN and OUT.
Last Answer : The IN instruction is used to move data from an I/O port into the accumulator. The OUT instruction is used to move data from the accumulator to an I/O port. The IN & OUT instructions are used only on microprocessor, which use a separate address space for interfacing.
Description : List out the five categories of the 8085 instructions. Give examples of the instructions for each group.
Last Answer : • Data transfer group – MOV, MVI, LXI. • Arithmetic group – ADD, SUB, INR. • Logical group –ANA, XRA, CMP. • Branch group – JMP, JNZ, CALL. • Stack I/O and Machine control group – PUSH, POP, IN, HLT.
Description : Memory access in RISC architecture is limited to instructions a. CALL and RET b. PUSH and POP c. STA and LDA d. MOV and JMP
Last Answer : c. STA and LDA
Description : In 8086 microprocessor one of the following instructions is executed before an arithmeticoperation a. AAM b) AAD c) DAS d) DAA
Last Answer : b) AAD
Description : The status that cannot be operated by direct instructions isa) Cy b) Z c) P d) AC
Last Answer : d) AC
Description : In latest generation computers, the instructions are executed a. Parallel only b. Sequentially only c. Both sequentially and parallel d. All of above
Last Answer : c. Both sequentially and parallel
Description : A microprocessor retries instructions from : a. Control memory b. Cache memory c. Main memory d. Virtual memory
Last Answer : c. Main memory
Description : Which of the following instruction is of logical instructions? i) CPL A ii) JC rel iii) DA A iv) ANL A, Rn v) RR A vi) CPL bit a) i, v b) v, iii, I c) iv, ii d) v, iii, ii
Last Answer : c) iv, i
Description : In 8087 coprocessor one of the following instructions is not valid a. FSIN b. FPTAN c. FIDIV d. FSQRT
Last Answer : a. FSIN
Description : In 8086 microprocessor one of the following instructions is executed before an arithmetic operation a) AAM b) AAD c) DAS d) DAA
Description : IDIV and DIV instructions perform the same operations for? a) Unsigned number b) Signed number c) Signed number & Unsigned number d) none of above.
Last Answer : b) Signed number
Description : The advantage of memory mapped I/O over I/O mapped I/O is, a) Faster b) Many instructions supporting memory mapped I/O c) Require a bigger address decoder d) All the above
Last Answer : d) All the above