Operating Systems Concepts problems
- 1. Virtual memory is
Options- A. simple to implement
- B. used in all major commercial operating systems
- C. less efficient in utilization of memory
- D. useful when fast I/O devices are not available
- E. None of the above Discuss
Correct Answer: used in all major commercial operating systems
- 2. The advantage of a command processor running only built-in commands is:
Options- A. flexibility to the users in running lists of commands by simply collecting them in named batch command files
- B. the command set being common across different hardware configurations
- C. users can create system programs and run them as commands
- D. the processing is much faster than would other-wise be the case when user defined commands are used
- E. None of the above Discuss
Correct Answer: the command set being common across different hardware configurations
- 3. In a magnetic disk, data is recorded in a set of concentric tracks which are subdivided into
Options- A. periods
- B. sectors
- C. zones
- D. groups
- E. None of the above Discuss
Correct Answer: sectors
- 4. Which of the following is not a characteristic of a daisy chaining priority control scheme?
Options- A. priority is programmable
- B. it is relatively easy to add more devices to the chain
- C. the failure of one device may affect other devices on the chain
- D. the number of control lines is independent of the number of devices on the chain
- E. None of the above Discuss
Correct Answer: priority is programmable
- 5. Assembler is
Options- A. a program that places programs into memory and prepares them for execution.
- B. a program that automate the translation of assembly language into machine language.
- C. a program that accepts a program written in a high level language and produces an object program.
- D. is a program that appears to execute a source program as if it were machine language.
- E. None of the above Discuss
Correct Answer: a program that automate the translation of assembly language into machine language.
- 6. Block or buffer caches are used
Options- A. to improve disk performance
- B. to handle interrupts
- C. to increase the capacity of main memory
- D. to speed up main memory read operation
- E. None of the above Discuss
Correct Answer: to improve disk performance
- 7. An incremental backup
Options- A. should be done each month
- B. uses more tapes
- C. saves all files
- D. saves only files that have recently changed
- E. None of the above Discuss
Correct Answer: saves only files that have recently changed
- 8. The total time to prepare a disk drive mechanism for a block of data to be read from it is
Options- A. latency
- B. latency plus transmission time
- C. latency plus seek time
- D. latency plus seek time plus transmission time
- E. None of the above Discuss
Correct Answer: latency plus seek time
- 9. File record length
Options- A. should always be fixed
- B. Should always be variable
- C. depends upon the size of the file
- D. should be chosen to match the data characteristics
- E. None of the above Discuss
Correct Answer: should be chosen to match the data characteristics
- 10. Which of the following is a phase of a compilation process
Options- A. Lexical analysis
- B. Code generation
- C. Both of the above
- D. Static analysis
- E. None of the above Discuss
Correct Answer: Both of the above
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