24. Which of the following HEX values represent the opcode of the "RET command? a) 00 25. How many bytes of program space are required for the command "MOV A, Hdata? a) 0 26. Which of the following address classifications does the command "MOV A, @RO belong? a)Register b) Direct 27. Which of the following address classifications does the command "AJMP BACK" belong? a) Register b) Direct c) Indirect d)immediate e) Relative Absolute reasonable guess of the execution time? b) 3F c) 22 d) 44 c) 2 d)3 e) 4 ) Indirect d) Immediate e) Relative Absolute 28. The following code executes on an 8051 which has a 12 Milz clock. Which of the following is a 0010 8290 2NNP1.0 001D 8291 001F 9292 0021 80P8 C, P1.0 c, P1.1 P1.2, C ANL MOV 24 25 a) 7 ns 29. Which of the following commands should be used to return from an interrupt service routine? a) RET 30. Which of the following address classifications does the command "MOVC A,@A PC belong? a) Register b) Direct 31. Which of the following companies manufactures the C8051F340 a) Intel 32. Which of the following pins on the CBOSI340 is GND? a) 1 33. How many pins does the C30S1F340 have? b) 9 ns c) I jas e) 15 us b) LEAVE c)RETT d) END c) Indirect d) Immediate e) Indexed Absolute b) Silicon Laboratories ) Philips d) Motorola b)7 c) 20 d) 48 b)7 c) 20 d) 48