781. What is the name of the operating system for the laptop computer called MacLite?
A. Windows
B. DOS
C. MS-DOS
D. OZ
E. None of the above
782. 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?
A. index addressing
B. indirect addressing
C. auto increment
D. auto decrement
E. None of the above
783. What is the name given to the values that are automatically provided by software to reduce keystrokes and improve a computer user’s productivity?
A. Defined values
B. Fixed values
C. Default values
D. Special values
E. None of the above
784. Page stealing
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
785. In MS-DOS 5.0, which is the number that acts as a code to uniquely identify the software product?
A. MS
B. DOS
C. MS DOS
D. 5.0
E. None of the above
786. Bug means
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
787. Memory management is :
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
788. 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
789. 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
790. 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