Microprocessors

Exercise: Microprocessors

Assuming that k is an integer what would the result of following expression in C
k = 2* 3 / 5 + 4 / 4 + 8 - 2 - 4 / 8

7.5

zero

Answer: A

k = 1 + 1 + 8 - 2 - 0 = 8 because k is an integer.

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Let the initial contents of ACC and CY in 8085 be

CY = 1
ACC = 10000001

After the instruction RAL is executed twice the contents of CY and ACC respectively will be

1 and 00000011

0 and 00000111

1 and 00000111

0 and 00000011

Answer: B

RAL means 'rotate left through carry'.

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Consider the following program in Basic

10 READ X, Y, Z
15 DATA 20, 30, 10
20 S = X + Y + Z
30 A = S/3
35 PRINT S, A, X, Y, Z
40 END

The output will be

60, 20, 20, 30, 10

10, 30, 20, 20, 60

60, 20, 30, 10, 20

60, 30, 10, 20, 20

Answer: A

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Consider the following library functions

EXP (i.e., e^x)
ARCTAN (i.e. tan^-1 x)
SQRT (i.e., x)
AES (i.e. |x|)

Which of the above are allowed in Pascal?

All

1 and 3 only

1, 3, 4 only

1, 2 and 3 only

Answer: A

All are allowed in Pascal.

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If F = 95.0 what will be the result of following FORTRAN 77 program?



REAL F , C
READ * , F
C = (5. / 9.) * (F - 32.)

35.0

25.0

Answer: A

(95 - 32) and decimal must be added.

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