1. The initial value of the semaphore that allows only one of the many processes to enter their critical sections, is
A. 8
B. 1
C. 16
D. 0
E. None of the above
Answer: B
2. The Register - to - Register (RR) instructions
A. have both their operands in the main store.
B. which perform an operation on a register operand and an operand which is located in the main store, generally leaving the result in the register, except in the case of store operation when it is also written into the specified storage location.
C. which perform indicated operations on two fast registers of the machine and leave the result in one of the registers.
D. all of the above
E. None of the above
Answer: C
3. A page fault
A. is an error is a specific page
B. occurs when a program accesses a page of memory
C. is an access to a page not currently in memory
D. is a reference to a page belonging to another program
E. None of the above
Answer: C
4. An algorithm is best described as
A. A computer language
B. A step by step procedure for solving a problem
C. A branch of mathematics
D. All of the above
E. None of the above
Answer: B
5. The process of transferring data intended for a peripheral device into a disk (or intermediate store) so that it can be transferred to peripheral at a more convenient time or in bulk, is known as
A. multiprogramming
B. spooling
C. caching
D. virtual programming
E. None of the above
Answer: B
6. Block caches or buffer caches are used
A. to improve disk performance
B. to handle interrupts
C. to increase the capacity of the main memory
D. to speed up main memory read operation
E. None of the above
Answer: A
7. Which of the following statements is false?
A. a small page size causes large page tables
B. internal fragmentation is increased with small pages
C. a large page size causes instructions and data that will not be referenced brought into primary storage
D. I/O transfers are more efficient with large pages
E. None of the above
Answer: B
8. The action of parsing the source program into the proper syntactic classes is known as
A. syntax analysis
B. lexical analysis
C. interpretation analysis
D. general syntax analysis
E. None of the above
Answer: B
9. Which, of the following is not true about the description of a decision table?
A. A decision table is easy to modify
B. A decision table is directly understood by the computer
C. A decision table is easy to understand
D. All of the above
E. None of the above
Answer: B
10. Trojan-Horse programs
A. are legitimate programs that allow unauthorized access
B. do not usually work
C. are hidden programs that do not show up on the system
D. usually are immediately discovered
E. None of the above
Answer: A
11. When did IBM release the first version of disk operating system DOS version 1.0?
A. 1981
B. 1982
C. 1983
D. 1984
E. None of the above
Answer: A
12. Which of the following is false about disk when compared to main memory?
A. non-volatile
B. longer storage capacity
C. lower price per bit
D. faster
E. None of the above
Answer: D
13. Producer consumer problem can be solved using
A. semaphores
B. event counters
C. monitors
D. all of the above
E. None of the above
Answer: D
14. Most of the microcomputer's operating systems like Apple DOS, MS DOS and PC DOS etc. are called disk operating systems because
A. they are memory resident
B. they are initially stored on disk
C. they are available on magnetic tapes
D. they are partly in primary memory and partly on disk
E. None of the above
Answer: B
15. The CPU, after receiving an interrupt from an I/O device
A. halts for a predetermined time
B. hands over control of address bus and data bus to the interrupting device
C. branches off to the interrupt service routine immediately
D. branches off to the interrupt service routine after completion of the current instruction
E. None of the above
Answer: D
16. Seeks analysis
A. is used for analyzing paging problems
B. is used for analyzing device busy problems
C. is used for analyzing control-unit busy problems
D. is only shown on real-time displays
E. None of the above
Answer: B
17. Which is a permanent database in the general model of compiler?
A. Literal Table
B. Identifier Table
C. Terminal Table
D. Source code
E. None of the above
Answer: C
18. What is the name of the technique in which the operating system of a computer executes several programs concurrently by switching back and forth between them?
A. Partitioning
B. Multitasking
C. Windowing
D. Paging
E. None of the above
Answer: B
19. Operating system
A. links a program with the subroutines it references
B. provides a layered, user-friendly interface
C. enables the programmer to draw a flowchart
D. all of the above
E. None of the above
Answer: B
20. Software that measures, monitors, analyzes, and controls real-world events is called:
A. system software
B. real-time software
C. scientific software
D. business software
E. None of the above
Answer: B
21.The details of all external symbols and relocation formation (relocation list or map) is provided to linker by
A. Macro processor
B. Translator
C. Loader
D. Editor
E. None of the above
Answer: B
22. The macro processor must perform
A. recognize macro definitions and macro calls
B. save the macro definitions
C. expand macros calls and substitute arguments
D. all of the above
E. None of the above
Answer: D
23. A development strategy whereby the executive control modules of a system are coded and tested first, is known as
A. Bottom-up development
B. Top-down development
C. Left-Right development
D. All of the above
E. None of the above
Answer: B
24. Which of the following is helpful in evaluating applications software what will best suit your needs?
A. recommendations by other users
B. computer magazines
C. objective software reviews
D. all of the above
E. None of the above
Answer: D
25. What problem is solved by Dijkstra's banker's algorithm?
A. mutual exclusion
B. deadlock recovery
C. deadlock avoidance
D. cache coherence
E. None of the above
Answer: C
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