Basic Operating System MCQ
Basic Operating System MCQ
181. The main memory of the computer
- Controls the operating of computer
- Performs data processing functions.
- Stores data and programs.
- None of these
182. Program counter (P(C) contains
- Address of an instruction to be fetched
- Instructions most recently fetched
- Data to be written into memory
- Data to be read from memory
183. MAR (memory address register)
- Contains data to be written into memory
- Contains data to be read from memory
- Specifies location in memory for next read/or writer
- Contains address of next instruction to be fetched
184. IR (Instruction register)
- Contains the address of an instruction to be fetched
- Contains the instruction most recently fetched
- Specifies memory addresses.
- None of these
185. Which of the following is not an address register ?
- Index register
- Segment pointer
- Stack pointer
- Data register
186. Following is not the state of Five-State register ?
- Index register
- Segment pointer
- Stack pointer
- Data register
187. Memory table is used
- To allocate main memory to process
- To allocate secondary memory to process
- To manage virtual memory
- A, B and C are true
188. I/O tables are used
- To assign I/O devices of computer
- To manage I/O devices of computer
- A and B both true
- A and B both false
189. The operating system control tables maintains file table, because
- These tabes manage I/O devices and channels of the computer system.
- These tables provide information aboutl the existence of iles, their location on secondary memory and their current status.
- these tables provide information to manage process
- None of these
190. Process in computer
- Controls the operations of the computer/process data functions
- Stores data and program.
- Move data between computer and its external environment.
- None of these