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ECE 267 Midterm I Examination Practice Problems (with answers)
- What is (5.3125) 10 converted into radix 2?
a) (101.1101) (^2) b) (101.1010) (^2) c) (101.0101) (^2) d) (101.1011) (^2) e) none of the above
- What is (A2.5) 16 converted into radix 10?
a) (162.3125) (^10) b) (102. 5) (^10) c) (102.3125) (^10) d) (162.5) (^10) e) none of the above
- What is (โ13) 10 written in 2's complement 8-bit binary code? Give the answer in hex notation.
a) 0Dh b) F3h c) F2h d) 8Dh e) none of the above
- What is ( 255 ) 10 written in 2's complement 16-bit binary code? Give the answer in hex notation.
a) 80FFh b) FFFFh c) FF01h d) 00FFh e) none of the above
- What is (34) 10 written in unsigned 8-bit binary code? Give the answer in hex notation.
a) 34h b) 22h c) DEh d) 24h e) none of the above
- Signed integer N is stored in an 8-bit register using 2โs complement binary code. What are the minimum and maximum values of N that would permit us to store 4N in the same register without overflow?
a) N (^) min = โ64, N (^) max = + b) N (^) min = โ 32, N (^) max = + c) N (^) min = โ11, N (^) max = + d) N (^) min = โ15, N (^) max = + e) none of the above
- What is (โ1.75) 10 in 32-bit single-precision IEEE floating point code? Give the answer in hex notation.
a) BFE00000h b) 3FE00000h c) C0700000h d) C0600000h e) none of the above
- What do the following Intel IA-32 assembly language instructions accomplish? Assume BL originally contains an ASCII character code.
cmp bl,โaโ jb exit cmp bl,โzโ ja exit sub bl,โaโ add bl,โAโ exit:
a) BL โ BL โ 32 b) if the character is uppercase, then it is made lowercase c) if the character is lowercase, then it is capitalized d) BL โ BL โ 64 e) none of the above
- Assume that register EAX stores X , a single-precision floating point number in IEEE format. The following instructions are then executed:
xor eax, 80000000h and eax, 80000000h
What result is now in EAX (in IEEE format)? a) X b) X c) โ X d) โ X e) none of the above
- For the IA-32 processor in real addressing mode, how many different memory addresses are there?
a) 2 8 b) 2^16 c) 2 32 d) 2^20 e) none of the above
- For the IA-32 processor in real addressing mode, which of the following addresses refers to the same byte in memory as does address E000:1234?
a) F000: b) 1234:E c) E111: d) F234: e) none of the above
- Which of the following instructions is bad programming practice?
a) cmp dl,'0' b) mov ebx,eax c) mov al,[ebx+1] d) cmp [ebx],
