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Electronics and Communication Engineering - Microprocessors

Exercise : Microprocessors - Section 3
11.
Consider the following statements about expressing real constants in exponential form in C
  1. The mantissa and exponent are separated either by e or E.
  2. The mantissa and exponent may have positive or negative sign.
  3. Default sign of mantissa is positive.
  4. Default sign of exponent is negative.
Which of the above statements are wrong?
1 only
1 and 4 only
1, 3 and 4 only
4 only
Answer: Option
Explanation:

E is not allowed and default sign of exponent is positive.

12.
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
35
25.0
25
Answer: Option
Explanation:

(95 - 32) and decimal must be added.

13.
Consider the following library functions
  1. EXP (i.e., ex)
  2. ARCTAN (i.e. tan-1 x)
  3. SQRT (i.e., x)
  4. 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: Option
Explanation:

All are allowed in Pascal.

14.
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: Option
Explanation:

.

15.
Let the initial contents of ACC and CY in 8085 be
  1. CY = 1
  2. 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: Option
Explanation:

RAL means 'rotate left through carry'.

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