单选题 The instruction currently being executed is stored in the ____.

A、 IR

B、 PC

C、 MAR

D、 Cache

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相关试题

单选题 What is the main function of the CPU?

A、Permanent file storage

B、Controlling hardware operations and arithmetic/logic data processing

C、Display output

D、Network connection

单选题 Paging divides memory into:

A、Segments

B、Pages and frames

C、Threads

D、Processes

单选题 A thread is:

A、Hardware execution unit

B、Lightweight unit of execution

C、Secondary memory

D、System bus

单选题 Deadlock occurs when:

A、CPU is idle

B、Memory is full

C、Processes wait indefinitely for resources

D、Cache miss occurs

单选题 Which synchronization tool uses wait() and signal() operations?

A、Cache

B、Semaphore

C、DMA

D、Segment

单选题 A process is:

A、A program in execution

B、A compiler

C、A file system

D、A memory partition

单选题 Which of the following is an operating system objective?

A、Increasing hardware cost

B、Supporting only one program at a time

C、Convenience for users

D、Removing memory destroys the running environment of programs

单选题 Which register contains the address of the next instruction?

A、IR (Instruction Register)

B、MBR

C、PC

D、MAR (Memory Address Register)