8087 is the coprocessor for both 8086 and 8088. 8089 is also a coprocessor of 8086 and 80888.
32. Which of the following is a coprocessor of the Motorola 68000 family?
A. 68001
B. 68011
C. 68881
D. 68010
Answer: C
The 68881 coprocessor of Motorola provides floating-point arithmetic.
33. Which of the following processors can perform exponential, logarithmic, and trigonometric functions?
A. 8086
B. 8087
C. 8080
D. 8088
Answer: B
8087 is a coprocessor that can perform all the mathematical functions including addition, subtraction, multiplication, division, exponential, logarithmic, trigonometric, etc. 8086, 8080, and 8088 are microprocessors that require the help of a coprocessor for floating-point arithmetic.
34. How many stack register does an 8087 have?
A. 4
B. 8
C. 16
D. 32
Answer: B
The 8087 coprocessor does not have a main register set but they have an 8-level deep stack register from st0 to st7.
35. Which of the following processor can handle infinity values?
A. 8080
B. 8086
C. 8087
D. 8088
Answer: C
8087 is a coprocessor that can handle infinity values with two types of closure known as affine closure and projective closure.
36. Which coprocessor supports affine closure?
A. 80187
B. 80287
C. 80387
D. 8088
Answer: B
80287 uses an affine closure for infinity values whereas 80387 and 80187 support projective closure for infinity values.
37. Which one is the floating-point coprocessor of 80286?
A. 8087
B. 80187
C. 80287
D. 80387
Answer: C
80286 supports 80287 as its floating-point coprocessor which helps in floating-point calculations.
38. How many pins does 8087 have?
A. 40 pin DIP
B. 20 pin DIP
C. 40 pins
D. 20 pins
Answer: A
All 8087 models have a 40-pin DIP which is operated in 5V.
39. What is the clock frequency of 8087?
A. 10 MHz
B. 5 MHz
C. 6 MHz
D. 4 MHz
Answer: B
8087 has 5 MHz as its clock frequency because the coprocessor must have the same clock frequency as that of the main processor.
40. How are negative numbers stored in a coprocessor?
A. 1’s complement
B. 2’s complement
C. decimal
D. gray
Answer: B
In a coprocessor, negative numbers are stored in 2’s complement with its leftmost sign bit of 1 whereas positive numbers are stored in the form of true value with its leftmost sign bit of 0.
