Systems software is a program that directs the overall operation of the computer, facilitates its use and interacts with the users. What are the different types of this software?

A. Allocate space in memory for the programs and resolve symbolic references between object decks B. Physically place the machine instructions and data into memory C. Adjust all address dependent locations, such as address constants, to correspond to the allocated space D. All of the above

A. ASRA B. LOADA h#OD4E, i C. STOREA h#014B, d D. ADDA h#01FE, i

A. many functions do not have to be implemented twice B. Functions are combined and it is not necessary to create intermediate files as output from the macro processor and input to the assembler C. more flexibility is available to the programmer in which he/she may use all the features of the assembler in conjunction with macros D. All of the above

A. absolute mode B. indirect mode C. immediate mode D. index mode