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Computer Science :: Operating System

  1. In which addressing mode the contents of a register specified in the instruction are first decremented, and then these contents are used as the effective address of the operands?

  2. A.

     index addressing

    B.

     indirect addressing

    C.

     auto increment

    D.

     auto decrement

    E.

     None of the above

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  3. What is the name given to the values that are automatically provided by software to reduce keystrokes and improve a computer user's productivity?

  4. A.

     Defined values

    B.

     Fixed values

    C.

     Default values

    D.

     Special values

    E.

     None of the above

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  5. Page stealing

  6. A.

     is a sign of an efficient system

    B.

     is taking page frames from other working sets

    C.

     should be the tuning goal

    D.

     is taking larger disk spaces for pages paged out

    E.

     None of the above

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  7. In MS-DOS 5.0, which is the number that acts as a code to uniquely identify the software product?

  8. A.

     MS

    B.

     DOS

    C.

     MS DOS

    D.

     5

    E.

     None of the above

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  9. Bug means

  10. A.

     A logical error in a program

    B.

     A difficult syntax error in a program

    C.

     Documenting programs using an efficient documentation tool

    D.

     All of the above

    E.

     None of the above

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  11. Memory management is :

  12. A.

     not used in modern operating system

    B.

     replaced with virtual memory on current systems

    C.

     not used on multiprogramming systems

    D.

     critical for even the simplest operating systems

    E.

     None of the above

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  13. The initial value of the semaphore that allows only one of the many processes to enter their critical sections, is

  14. A.

     8

    B.

     1

    C.

     16

    D.

     0

    E.

     None of the above

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  15. The Register - to - Register (RR) instructions

  16. 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

    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

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  17. A page fault

  18. 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

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  19. An algorithm is best described as

  20. 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

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