System Software

List the task performed by document linking process in an interactive system.

Differentiate between LEX and YACC.

What is shift reduce parsing? Explain with an example.

Write a YACC program to recognize an arithmetic expression involving operations +, >,/.

List any 3 LEX-YACC variables and functions.

What is regular expression? Explain any 8 characteristics that form a regular expression.

Explain the structure of a LEX program with example.

Write a note on MASM macro-processer.

Briefly explain the machine-independent macro processer features.

Explain the data structures involved in macro-processer algorithm.

Explain the functions and capabilities of an interactive debugging system.

Explain the structure of a text editor with a neat diagram.

Bring out the differences between system software and application software, with examples.

Explain the two design options of loaders.

What is loader? What are its advantages and disadvantages? Explain the boot strap loader,with algorithm.

What are control sections? How are they processed?

 Discuss different design options of assembler.

Differentiate between literal and immediate operand with example.

Generate the object code for the source program given below

 CLEAR= B4, LDT = 74, TD = EO, JEQ = 30, LDCH = 50, WD = DC, TIXR = B8, LT = 38, RSUB = 4C, X = 1  T=5. 

 Explain the data structures used in assembler algorithims.

Write and explain the algorithm for a pass – 1 of two - pass assembler.

Briefly explain the SIC/XE machine architecture.

Write the program in both SIC and SIC/XE to copy a character string 'SYSTEM SOFTWARE' to another character string.