14. What is pre-emption?

　　15. Assume the BC register value is 8538H, and the DE register value is 62 A5H.Find the value of register BC after the following assembly operations:

　　MOV A,C

　　SUB E

　　MOV C,A

　　MOV A,B

　　SBB D

　　MOV B,A

　　16. In the Assembly code shown below

　　LOOP: MVI C,78H

　　DCR C

　　JNZ LOOP

　　HLT

　　How many times is the DCR C Operation executed?

　　17. Describe the most efficient way (in term of execution time and code size) to spanide a number by 4 in assembly language

　　18. what value is stored in m in the following assembly language code fragment if n=7?

　　LDAA #n

　　LABEL1: CMPA #5

　　BHI L3

　　BEQ L2

　　DECA

　　BRA L1

　　LABEL2: CLRA

　　LABEL3: STAA #m

　　19. What is the state of a process if a resource is not available?

　　#define a 365*24*60*60

　　20. Using the #define statement, how would you declare a manifest constant that returns the number of seconds in a year? Disregard leap years in your answer.