In an absolute loading scheme, which loader function is accomplished by assembler.
Answer: A
Correct answer: Reallocation
In an absolute scheme the assembler fixes the actual addresses when it translates, so relocation has already been done by the time the program reaches the loader. The loader is left with nothing but to place the code at those addresses and start it.
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Which, of the following checks, cannot be carried out on the input data to a system?
Answer: B
Correct answer: Syntax check
Input data can be checked for consistency between fields, for a range a value must lie in, and for format and check digits. A syntax check applies to the grammar of a program, which is the compiler’s concern, not the data a running system reads.
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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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A translator which reads an entire programme written in a high level language and converts it into machine language code is:
Answer: C
Correct answer: compiler
A compiler reads the entire high-level source program, checks it, and produces machine code for the whole of it before anything runs - which is why compiled programs run fast but must be recompiled after every change. An assembler translates assembly language, and an interpreter executes a statement at a time.
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Which of the following DOS commands is used to display or set the date of your computer's internal clock?
Answer: C
Correct answer: DATE
DATE displays the current date and offers to change it; typed with a date it sets the clock directly. Its companion TIME does the same for the time of day. VER reports the DOS version, and HOUR and DAY are not DOS commands.
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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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When executed from a bootable hard drive, which command will make a formatted floppy disk bootable?
Answer: D
Correct answer: SYS C: A:
SYS copies the two hidden system files and COMMAND.COM to the target disk and writes the boot record, which is what makes the disk bootable. Copying COMMAND.COM alone leaves out the hidden files, so the disk still will not start.
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What is the name given to the values that are automatically provided by software to reduce keystrokes and improve a computer user's productivity?
Answer: C
Correct answer: Default values
A default is the value the software supplies when the user offers none - today’s date, the usual printer, the standard margin. It saves keystrokes in the common case while leaving the user free to type something else.
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When you create a subdirectory within a directory, the process is known as _____
Answer: D
Correct answer: nesting
Putting a directory inside another is nesting, and it is what makes the file system a tree rather than a flat list - each level containing files and further directories, addressed by the path that names the branch.
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Scheduling is
Answer: A
Correct answer: allowing jobs to use the processor
Scheduling is deciding which of the ready jobs gets the processor and for how long. It is central to performance - throughput, turnaround and response time all depend on it - it is needed on a uniprocessor precisely because there is only one processor to share, and the policy chosen depends on what the system is for.
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