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- Question
The computational technique used to compute the disk storage address of individual records is called:
Options- A. bubble memory
- B. key fielding
- C. dynamic reallocation
- D. hashing
- E. None of the above
- Correct Answer
- hashing
- 1. In MS-DOS, relocatable object files and load modules have extensions
Options- A. .OBJ and .COM or .EXE, respectively
- B. .COM and .OBJ, respectively
- C. .EXE and .OBJ, respectively
- D. .DAS and .EXE, respectively
- E. None of the above Discuss
- 2. Scheduling is
Options- A. allowing jobs to use the processor
- B. unrelated to performance consideration
- C. not required in uniprocessor systems
- D. the same regard-less of the purpose of the system
- E. None of the above Discuss
- 3. Which of the following software types is used to simplify using systems software?
Options- A. spreadsheet
- B. operating environment
- C. timesharing
- D. multitasking
- E. None of the above Discuss
- 4. When a computer is first turned on or restarted, a special type of absolute loader is executed, called a
Options- A. "Compile and Go" loader
- B. Boot loader
- C. Bootstrap loader
- D. Relating loader
- E. None of the above Discuss
- 5. A partitioned data set is most used for
Options- A. a program or source library
- B. storing program data
- C. storing backup information
- D. storing ISAM files
- E. None of the above Discuss
- 6. In analyzing the compilation of PL/I program, the description "creation of more optimal matrix" is associated with
Options- A. Assembly and output
- B. Code generation
- C. Syntax analysis
- D. Machine independent optimization
- E. None of the above Discuss
- 7. Job Control Language (JCL) statements are used to
Options- A. Read the input from the slow-speed card reader to the high-speed magnetic disk
- B. Specify, to the operating system, the beginning and end of a job in a batch
- C. Allocate the CPU to a job
- D. All of the above
- E. None of the above Discuss
- 8. If you do not know which version of MS-DOS you are working with, which command will you use after having booted your operating system?
Options- A. FORMAT command
- B. DIR command
- C. VER command
- D. DISK command
- E. None of the above Discuss
- 9. Which of the following is not applications software?
Options- A. Word processing
- B. Spreadsheet
- C. UNIX
- D. Desktop publishing
- E. None of the above Discuss
- 10. For how many processes which are sharing common data, the Dekker's algorithm implements mutual exclusion?
Options- A. 1
- B. 2
- C. 3
- D. 4
- E. None of the above Discuss
Operating Systems Concepts problems
Search Results
Correct Answer: .OBJ and .COM or .EXE, respectively
Correct Answer: allowing jobs to use the processor
Correct Answer: timesharing
Correct Answer: Bootstrap loader
Correct Answer: a program or source library
Correct Answer: Machine independent optimization
Correct Answer: Specify, to the operating system, the beginning and end of a job in a batch
Correct Answer: VER command
Correct Answer: UNIX
Correct Answer: 2
Explanation:
Dekker's algorithm is the first known correct solution to the mutual exclusion problem in concurrent programming. The solution is attributed to Dutch mathematician Th. J. Dekker by Edsger W. Dijkstra in his manuscript on cooperating sequential processes. It allows two threads to share a single-use resource without conflict, using only shared memory for communication.
It avoids the strict alternation of a naive turn-taking algorithm, and was one of the first mutual exclusion algorithms to be invented.
Source: http://en.wikipedia.org/wiki/Dekker's_algorithm
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