Answer:
Answered below
Explanation:
aFile = open("books.txt", "r")
This code uses the function open() which takes two parameters. The first parameter is the file name while the second parameter is the mode in which you are accessing the file.
The "r" mode opens the file in a reading state. That is, you can only read from the file. This code completes the reading process
aFile.read( )
The "w" mode opens the file so you can write to it and make changes.
The "a" mode opens the file so you can add contents to it.
A return type cannot exist in the constructor. It ought to produce and deliver fresh objects. Consequently, a compilation error would result.
Including a return type in a constructor declaration is not allowed. A constructor has to accept one or more input parameters. In the absence of explicitly declared constructors for the class, Java will give a default constructor. The name of the constructor should match the class name. 2) The compiler will automatically produce a default parameterless constructor for a class if you don't define one. 3) All instance variables are initialized to default values, such as 0, null, and super(), by the default constructor.
Learn more about variable here-
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Answer:
Currently running process
Explanation:
In preemptive priority scheduling there is usually a form of comparison of the schedule with the other function or processes which are present in the queue also.
In preemptive priority scheduling, when a process arrives at the ready queue, its priority is compared with the priority of currently running process.
Answer and Explanation:
Advantages of having large page sizes: Smaller page table, less page faults, less overhead in reading/writing of pages.
Advantages of having small page sizes: reduces internal fragmentation, better with locality of reference.
