Seeks analysis
Answer: B
Correct answer: is used for analyzing device busy problems
Seek analysis counts the seeks issued to each disk and how far the arm travels, which shows which devices are the bottleneck and whether the load should be spread across more spindles. It is a device-utilisation measurement, not a paging or control-unit one.
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Which is a permanent database in the general model of compiler?
Answer: C
Correct answer: Terminal Table
The terminal table holds the fixed vocabulary of the language - its keywords, operators and punctuation, each with the information the compiler needs about it. It is a permanent database because it is the same for every program compiled, unlike the identifier and literal tables, which are built afresh from each source program.
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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?
Answer: B
Correct answer: Multitasking
Multitasking gives each program a short turn on the processor and switches rapidly between them, saving and restoring the state each time, so that all appear to run at once. Paging and partitioning divide memory rather than processor time.
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Operating system
Answer: B
Correct answer: provides a layered, user-friendly interface
An operating system sits between the user and the bare machine and presents it in progressively more convenient terms - a file rather than a disk sector, a process rather than a schedule of interrupts, a command or a window rather than a device register. Linking a program to its subroutines is the linker’s job.
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Software that measures, monitors, analyzes, and controls real-world events is called:
Answer: B
Correct answer: real-time software
Real-time software measures, monitors, analyses and controls events as they happen, and must respond within a guaranteed time - an answer that arrives late is as useless as a wrong one. Process control, avionics and instrumentation systems are of this kind.
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The details of all external symbols and relocation formation (relocation list or map) is provided to linker by
Answer: B
Correct answer: Translator
The translator - the compiler or assembler - is what knows which symbols a module defines and which it refers to elsewhere, so it records the external symbol dictionary and the relocation list in the object module for the linker to use. The loader and the editor merely handle the file.
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The macro processor must perform
Answer: D
Correct answer: all of the above
A macro processor must do all three: recognise macro definitions and calls in the source, save each definition where it can be found again, and at every call expand the saved body, substituting the actual arguments for the formal parameters. Omitting any one leaves the facility unusable.
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A development strategy whereby the executive control modules of a system are coded and tested first, is known as
Answer: B
Correct answer: Top-down development
In top-down development the executive control modules are written and tested first, with stubs standing in for the lower-level routines that are not yet written. Interface errors and design faults therefore surface early, when they are still cheap to correct.
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Which of the following is helpful in evaluating applications software what will best suit your needs?
Answer: D
Correct answer: all of the above
Sound evaluation draws on all three: other users report how the package behaves in daily work, magazines compare it against its rivals, and an objective review tests it against stated criteria. Each covers what the others miss, so together they give a fuller picture than any one alone.
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What problem is solved by Dijkstra's banker's algorithm?
Answer: C
The Banker's algorithm is a resource allocation & deadlock avoidance algorithm developed by Edsger Dijkstra that tests for safety by simulating the allocation of pre-determined maximum possible amounts of all resources, and then makes a "safe-state" check to test for possible deadlock conditions for all other pending activities, before deciding whether allocation should be allowed to continue
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