Computer Organization Interview Questions and Answers YASH PAL, 19 March 202228 June 2025 Here in this article, we are going to see basic to advanced Computer Organization Interview Questions and Answers for Interview preparation, University Exams.Spatial locality refers to the problem that once a location is referencedit will not be referenced againit will be referenced againa nearby location will be referenced soonnone of the aboveAnswer – (3) a nearby location will be referenced soonA polled interrupt is handled bysoftwarehardwarefirmwarenone of theseAnswer – (1) softwareConsider the following register-transfer languageR3 <– R3 + M[R1 + R2] where R1, R2 are the CPU registers and M is a memory location in primary memory. which addressing mode is suitable for the above register-transfer language?immediateindexeddirectdisplacementAnswer – (2) indexed Which memory unit has the lowest access time?cacheregistersmagnetic diskmain memoryAnswer – (2) registersThe computer performs all mathematical and logical operations inside itsmemory unitcentral processing unitoutput unitvisual display unitAnswer – (2) central processing unitWhich of the following are examples of input devices?visual display unit, dot matrix printer, laser printerkeyboard, mouse, optical mark readerarithmetic and logic unit, the control unitRAM, ROM, PROMAnswer – (2) Keyboard, mouse, optical mark readerIn a 16-bit instruction code format 3-bit operation code, 12-bit address, and 1-bit are assigned for address mode designation. For indirect addressing, the mode bit is01pointeroff-setAnswer – (2) 1What do CISC and RISC mean?common instruction set controller and rare instruction set controllercomplex instruction set controller and reduced instruction set controllercompiled instruction set source code and recompiled instruction source codenone of the aboveAnswer – (4) None of the aboveDuring the DMA transfer. DMA controller takes over the buses to manage the transferdirectly from the CPU to the memorydirectly from memory to the CPUindirectly between the I/O device and memorydirectly between the I/O device and memoryAnswer – (4) directly between the I/O device and memoryBooth’s algorithm is used in floating-pointadditionsubtractionmultiplicationdivisionAnswer – (3) multiplicationMatch List-I with List-II and select the correct answer using the codes given below the lists:List-ILis-IIA. Regs[R4] ← Regs[R4] + Regs[R3]1. immediateB. Regs[R4] ← Regs[R4] + 32. registerC. Regs[R4] ← Regs[R4] + Mem[Regs[R1]]3. displacement A B C 3 2 1 2 1 3 1 2 3 3 1 2Answer – (2) 2 1 3A 32-bit address bus allows access to a memory of capacity64 MB16 MB1 GB4 GBAnswer – (4) 4 GBPipelining improves CPU performance due toreduced memory access timeincreased clock speedthe introduction of parallelismadditional functional unitsAnswer – (3) the introduction of parallelismThe system bus is made up ofdata busdata bus and address busdata bus and control busthe data bus, control bus, and address busAnswer – (4) the data bus, control bus, and address busCache memory enhancesmemory capacitymemory access timeeffective memory access timesecondary storage access timeAnswer – (3) effective memory access timeCache memoryhas greater capacity than RAMis faster to access than CPU registersis permanent storagefaster to access than RAMAnswer – (4) faster to access than RAMAn instruction cycle refers tofetching an instructionclock speedfetching, decoding, and executing an instructionexecuting an instructionAnswer – (3) fetching, decoding, and executing an instructionGiven a 5-stage pipeline with stages taking 1, 2, 3, 1, and 1 unit of time, the clock period of the pipeline is81/81/33Answer – (4) 3A hardware interrupt isalso called an internal interruptalso called an external interruptan I/O interrupta clock interruptAnswer – (2) also called an external interruptThe read/write linebelongs to the data busbelongs to the control busbelongs to the address busCPU busAnswer – (2) belongs to the control busNote – more questions and answers will be added from time to time. Computer Organization Tutorials Computer Science Tutorials Interview questions answers computer scienceinterview preparation