81 + Interview Questions in Machine Instructions And Programs in Computer Architecture Page 2 InterviewSolution

51.	When using the Big Endian assignment to store a number, the sign bit of the number is stored in _____(a) The higher order byte of the word(b) The lower order byte of the word(c) Can’t say(d) None of the mentionedI had been asked this question in an international level competition.Query is from Memory Locations and Addresses topic in division Machine Instructions and Programs of Computer Architecture
Answer» Correct CHOICE is (a) The higher ORDER BYTE of the word To EXPLAIN: NONE.

Discussion

52.	When we perform subtraction on -7 and -5 the answer in 2’s complement form is ________(a) 11110(b) 1110(c) 1010(d) 0010The question was posed to me in an online interview.This interesting question is from Numbers and Arithmetic Operations in section Machine Instructions and Programs of Computer Architecture
Answer» Correct OPTION is (b) 1110 Easy explanation: First the 2’s complement is FOUND and that is ADDED to the number and the overflow is IGNORED.

Discussion

53.	The alternate way of writing the instruction, ADD #5,R1 is ______(a) ADD [5],[R1];(b) ADDI 5,R1;(c) ADDIME 5,[R1];(d) There is no other wayThe question was asked during an online interview.My question comes from Assembly Language topic in chapter Machine Instructions and Programs of Computer Architecture
Answer» Right answer is (B) ADDI 5,R1; The best explanation: The ADDI instruction, means the addition is in immediate addressing MODE.

Discussion

54.	The utility program used to bring the object code into memory for execution is ______(a) Loader(b) Fetcher(c) Extractor(d) LinkerThis question was addressed to me in quiz.My question is based upon Assembly Language topic in portion Machine Instructions and Programs of Computer Architecture
Answer» Correct OPTION is (a) Loader The best EXPLANATION: The PROGRAM is used to LOAD the program into MEMORY.

Discussion

55.	Can you perform an addition on three operands simultaneously in ALN using Add instruction?(a) Yes(b) Not possible using Add, we’ve to use AddSetCC(c) Not permitted(d) None of the mentionedI have been asked this question in an online interview.My question is from Instructions and Instruction Sequencing topic in section Machine Instructions and Programs of Computer Architecture
Answer» The CORRECT CHOICE is (c) Not permitted For explanation I would say: You cannot PERFORM an addition on THREE operands simultaneously because the THIRD operand is where the result is stored.

Discussion

56.	The addressing mode which makes use of in-direction pointers is ______(a) Indirect addressing mode(b) Index addressing mode(c) Relative addressing mode(d) Offset addressing modeThis question was posed to me during an online interview.The query is from Addressing Modes in section Machine Instructions and Programs of Computer Architecture
Answer» The correct answer is (a) Indirect ADDRESSING mode The explanation is: In this addressing mode, the value of the register serves as another memory location and HENCE we use POINTERS to get the DATA.

Discussion

57.	What is subroutine nesting?(a) Having multiple subroutines in a program(b) Using a linking nest statement to put many subroutines under the same name(c) Having one routine call the other(d) None of the mentionedI had been asked this question by my school principal while I was bunking the class.Question is from Subroutines and Nesting topic in portion Machine Instructions and Programs of Computer Architecture
Answer» RIGHT ANSWER is (c) Having ONE routine CALL the other Explanation: None.

Discussion

58.	In the case of nested subroutines, the stack top is always _________(a) The saved contents of the called sub routine(b) The saved contents of the calling sub routine(c) The return addresses of the called sub routine(d) None of the mentionedI got this question in an international level competition.This interesting question is from Parameter Passing and Stack Frame in portion Machine Instructions and Programs of Computer Architecture
Answer» Right choice is (a) The saved CONTENTS of the CALLED sub routine Best EXPLANATION: NONE.

Discussion

59.	The last statement of the source program should be _______(a) Stop(b) Return(c) OP(d) EndThe question was posed to me in exam.This interesting question is from Assembly Language in section Machine Instructions and Programs of Computer Architecture
Answer» CORRECT choice is (d) End Easy EXPLANATION: This enables the PROCESSOR to load some other PROCESS.

Discussion

60.	The instructions like MOV or ADD are called as ______(a) OP-Code(b) Operators(c) Commands(d) None of the mentionedI have been asked this question in an interview for job.Enquiry is from Assembly Language in section Machine Instructions and Programs of Computer Architecture
Answer» The correct option is (a) OP-Code The EXPLANATION: This OP – CODES tell the system what operation to perform on the operands.

Discussion

61.	The two phases of executing an instruction are __________(a) Instruction decoding and storage(b) Instruction fetch and instruction execution(c) Instruction execution and storage(d) Instruction fetch and Instruction processingI had been asked this question in semester exam.My enquiry is from Instructions and Instruction Sequencing in division Machine Instructions and Programs of Computer Architecture
Answer» CORRECT OPTION is (B) Instruction fetch and instruction execution Explanation: FIRST, the instructions are FETCHED and decoded and then they’re executed and stored.

Discussion

62.	RTN stands for ___________(a) Register Transfer Notation(b) Register Transmission Notation(c) Regular Transmission Notation(d) Regular Transfer NotationThe question was posed to me during an interview for a job.Enquiry is from Instructions and Instruction Sequencing topic in portion Machine Instructions and Programs of Computer Architecture
Answer» Correct option is (a) Register TRANSFER Notation The best I can explain: This is the way of WRITING the assembly LANGUAGE code with the help of register NOTATIONS.

Discussion

63.	In a normal n-bit adder, to find out if an overflow as occurred we make use of ________(a) And gate(b) Nand gate(c) Nor gate(d) Xor gateThis question was posed to me in semester exam.My doubt stems from Numbers and Arithmetic Operations in section Machine Instructions and Programs of Computer Architecture
Answer» CORRECT CHOICE is (d) XOR gate The EXPLANATION is: NONE.

Discussion

64.	When parameters are being passed on to the subroutines they are stored in ________(a) Registers(b) Memory locations(c) Processor stacks(d) All of the mentionedThe question was asked in an international level competition.My doubt is from Subroutines and Nesting topic in division Machine Instructions and Programs of Computer Architecture
Answer» RIGHT OPTION is (d) All of the mentioned For EXPLANATION I would say: In the case of, parameter PASSING the data can be stored on any of the storage space.

Discussion

65.	The order in which the return addresses are generated and used is _________(a) LIFO(b) FIFO(c) Random(d) Highest priorityI had been asked this question during an online exam.The query is from Subroutines and Nesting topic in portion Machine Instructions and Programs of Computer Architecture
Answer» RIGHT ANSWER is (a) LIFO To EXPLAIN I WOULD say: That is the routine called first is returned first.

Discussion

66.	When using Branching, the usual sequencing of the PC is altered. A new instruction is loaded which is called as ______(a) Branch target(b) Loop target(c) Forward target(d) Jump instructionI had been asked this question during an interview for a job.This interesting question is from Instructions and Instruction Sequencing in chapter Machine Instructions and Programs of Computer Architecture
Answer» RIGHT ANSWER is (a) BRANCH target Easy EXPLANATION: NONE.

Discussion

67.	The purpose of the ORIGIN directive is __________(a) To indicate the starting position in memory, where the program block is to be stored(b) To indicate the starting of the computation code(c) To indicate the purpose of the code(d) To list the locations of all the registers usedI had been asked this question by my college professor while I was bunking the class.Enquiry is from Assembly Language topic in division Machine Instructions and Programs of Computer Architecture
Answer» RIGHT choice is (a) To indicate the starting position in memory, where the PROGRAM block is to be stored For explanation I would say: This does the FUNCTION similar to the main STATEMENT.

Discussion

68.	While using the iterative construct (Branching) in execution _____________ instruction is used to check the condition.(a) TestAndSet(b) Branch(c) TestCondn(d) None of the mentionedI had been asked this question in an interview for job.I need to ask this question from Instructions and Instruction Sequencing topic in section Machine Instructions and Programs of Computer Architecture
Answer» The CORRECT answer is (b) Branch To ELABORATE: Branch instruction is USED to check the test condition and to PERFORM the memory jump with the help of offset.

Discussion

69.	In some pipelined systems, a different instruction is used to add to numbers which can affect the flags upon execution. That instruction is _______(a) AddSetCC(b) AddCC(c) Add++(d) SumSetCCThis question was addressed to me in examination.The query is from Numbers and Arithmetic Operations topic in portion Machine Instructions and Programs of Computer Architecture
Answer» RIGHT ANSWER is (a) AddSetCC For explanation: By using this INSTRUCTION the CONDITION FLAGS won’t be affected at all.

Discussion

70.	Which method of representation has two representations for ‘0’?(a) Sign-magnitude(b) 1’s complement(c) 2’s complement(d) None of the mentionedThis question was addressed to me during an interview.I'm obligated to ask this question of Numbers and Arithmetic Operations in portion Machine Instructions and Programs of Computer Architecture
Answer» The CORRECT OPTION is (a) Sign-magnitude The EXPLANATION: ONE is positive and one for negative.

Discussion

71.	Which representation is most efficient to perform arithmetic operations on the numbers?(a) Sign-magnitude(b) 1’s complement(c) 2’S complement(d) None of the mentionedThe question was posed to me in quiz.The question is from Numbers and Arithmetic Operations in section Machine Instructions and Programs of Computer Architecture
Answer» Right CHOICE is (c) 2’S complement The explanation is: The two’s complement form is more suitable to PERFORM ARITHMETIC operations as there is no need to involve the SIGN of the number into consideration.

Discussion

72.	Instructions which won’t appear in the object program are called as _____(a) Redundant instructions(b) Exceptions(c) Comments(d) Assembler DirectivesThis question was addressed to me during an interview.Origin of the question is Assembly Language in portion Machine Instructions and Programs of Computer Architecture
Answer» Correct choice is (d) Assembler Directives Explanation: The directives HELP the program in GETTING COMPILED and hence won’t be there in the object CODE.

Discussion

73.	The appropriate return addresses are obtained with the help of ____ in case of nested routines.(a) MAR(b) MDR(c) Buffers(d) Stack-pointersThis question was addressed to me during an internship interview.I would like to ask this question from Subroutines and Nesting topic in chapter Machine Instructions and Programs of Computer Architecture
Answer» RIGHT choice is (d) Stack-pointers The EXPLANATION is: The pointers are USED to point to the location on the stack where the ADDRESS is STORED.

Discussion

74.	The instruction, Add #45,R1 does _______(a) Adds the value of 45 to the address of R1 and stores 45 in that address(b) Adds 45 to the value of R1 and stores it in R1(c) Finds the memory location 45 and adds that content to that of R1(d) None of the mentionedThis question was addressed to me in semester exam.My question is taken from Addressing Modes in portion Machine Instructions and Programs of Computer Architecture
Answer» Right option is (B) ADDS 45 to the value of R1 and STORES it in R1 Explanation: The INSTRUCTION is using immediate ADDRESSING mode hence the value is stored in the location 45 is added.

Discussion

75.	During the transfer of data between the processor and memory we use______(a) Cache(b) TLB(c) Buffers(d) RegistersThis question was posed to me in exam.The origin of the question is Memory Locations and Addresses topic in division Machine Instructions and Programs of Computer Architecture
Answer» Correct CHOICE is (d) Registers To EXPLAIN I WOULD say: NONE.

Discussion

76.	The assembler stores all the names and their corresponding values in ______(a) Special purpose Register(b) Symbol Table(c) Value map Set(d) None of the mentionedThis question was addressed to me in an online quiz.Question is taken from Assembly Language topic in section Machine Instructions and Programs of Computer Architecture
Answer» RIGHT choice is (b) Symbol Table To explain I WOULD say: The table where the assembler stores the variable names ALONG with their CORRESPONDING MEMORY locations and values.

Discussion

77.	Add #45, when this instruction is executed the following happen/s _______(a) The processor raises an error and requests for one more operand(b) The value stored in memory location 45 is retrieved and one more operand is requested(c) The value 45 gets added to the value on the stack and is pushed onto the stack(d) None of the mentionedThe question was asked in homework.Origin of the question is Addressing Modes in chapter Machine Instructions and Programs of Computer Architecture
Answer» CORRECT choice is (b) The value stored in MEMORY location 45 is retrieved and one more operand is requested To EXPLAIN I would say: None.

Discussion

78.	The most efficient way of handling parameter passing is by using ______(a) General purpose registers(b) Stacks(c) Memory locations(d) None of the mentionedThis question was addressed to me during an interview for a job.The above asked question is from Subroutines and Nesting in portion Machine Instructions and Programs of Computer Architecture
Answer» Correct option is (a) GENERAL purpose REGISTERS The explanation: By using general purpose registers for the parameter passing we MAKE the process more EFFICIENT.

Discussion

79.	The return address of the Sub-routine is pointed to by _______(a) IR(b) PC(c) MAR(d) Special memory registersThe question was asked during an internship interview.This is a very interesting question from Subroutines and Nesting topic in chapter Machine Instructions and Programs of Computer Architecture
Answer» Correct ANSWER is (b) PC For EXPLANATION I would say: The return ADDRESS from the SUBROUTINE is pointed to by the PC.

Discussion

80.	__________ converts the programs written in assembly language into machine instructions.(a) Machine compiler(b) Interpreter(c) Assembler(d) ConverterThe question was asked in examination.I need to ask this question from Assembly Language topic in division Machine Instructions and Programs of Computer Architecture
Answer» The correct choice is (c) Assembler For EXPLANATION I WOULD say: An assembler is a SOFTWARE used to convert the programs into machine INSTRUCTIONS.

Discussion

81.	Add #%01011101,R1 , when this instruction is executed then _________(a) The binary addition between the operands takes place(b) The Numerical value represented by the binary value is added to the value of R1(c) The addition doesn’t take place, whereas this is similar to a MOV instruction(d) None of the mentionedI have been asked this question during an interview.I'd like to ask this question from Memory Operations and Management in portion Machine Instructions and Programs of Computer Architecture
Answer» CORRECT answer is (a) The binary addition between the OPERANDS takes place Easiest explanation: This PERFORMS operations in binary mode DIRECTLY.

Discussion

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The utility program used to bring the object code into memory for execution is ______(a) Loader(b) Fetcher(c) Extractor(d) LinkerThis question was addressed to me in quiz.My question is based upon Assembly Language topic in portion Machine Instructions and Programs of Computer Architecture

The last statement of the source program should be _______(a) Stop(b) Return(c) OP(d) EndThe question was posed to me in exam.This interesting question is from Assembly Language in section Machine Instructions and Programs of Computer Architecture

The instructions like MOV or ADD are called as ______(a) OP-Code(b) Operators(c) Commands(d) None of the mentionedI have been asked this question in an interview for job.Enquiry is from Assembly Language in section Machine Instructions and Programs of Computer Architecture

The order in which the return addresses are generated and used is _________(a) LIFO(b) FIFO(c) Random(d) Highest priorityI had been asked this question during an online exam.The query is from Subroutines and Nesting topic in portion Machine Instructions and Programs of Computer Architecture

During the transfer of data between the processor and memory we use______(a) Cache(b) TLB(c) Buffers(d) RegistersThis question was posed to me in exam.The origin of the question is Memory Locations and Addresses topic in division Machine Instructions and Programs of Computer Architecture