1. Which one of the following is the successor of the 8086 and 8088 processors?
A. 80286
B. 80387
C. 8051
D. 8087
Answer: A
80286 is the successor of 8086 and 8088 because it possesses a CPU based on 8086 and 8088. 8051 is a microcontroller designed by Intel which is commonly known as Intel MCS-51. 8087 is the first floating-point coprocessor of 8086.
2. Which is the processor behind the IBM PC AT?
A. 80387
B. 8088
C. 80286
D. 8086
Answer: C
The processor was successful in the PC market and it was a successful processor behind IBM.
3. Which are the two modes of 80286?
A. Real mode and protected mode
B. Mode1 and mode2
C. Alternate and main
D. Mode A and mode B
Answer: A
It possesses two modes which are called real and protected modes. In real modes, it adds some additional register in order to access a size greater than 16MB while still preserving its compatibility with 8086 and 8088.
4. Which register set of 80286 forms the same register set of 8086 processors?
A. AH, AL
B. BX
C. BX, AX
D. EL
Answer: A
The 16-bit register of 80286 can also act as an 8-bit register by splitting into a higher register and lower register.
5. Which are the 4 general purposes 16 bit register in Intel 80286?
A. CS,DS,SS,ES
B. AX,BX,CX,DX
C. IP,FL,DI,SI
D. DI,SI,BP,SP
Answer: B
Intel 80286 possesses 4 general-purpose registers and these are 16-bit in size. In addition to the general-purpose register, there are four segmented registers, two index registers, and a base pointer register.
6. Which are the 4 segmented registers in intel 80286?
A. AX,BX,CX,DX
B. AS,BS,CS,DS
C. SP,DI,SI,BP
D. IP,FL,SI,DI
Answer: B
Intel 80286 possess 4 general-purpose registers, 4 segmented registers, 2 index register, and a base pointer register.
7. How is expanded memory accessed in 80286?
A. Paging
B. Interleaving
C. RAM
D. External storage
Answer: A
The 80286 processor can access beyond 1MB by paging and special hardware to stimulate the missing address lines. This is called expanded memory.
8. When is the register set gets expanded in 80286?
A. In real mode
B. In expanded mode
C. In protected mode
D. Interrupt mode
Answer: C
In protected mode, two additional register arises which is called the index register and base pointer register which helps in expanding the register.
9. Which are the two registers available in the protected mode of 80286?
A. General and segmented
B. General and pointer
C. Index and base pointer
D. Index and segmented
Answer: C
In the protected mode of 80286, two additional register arises which is called the index register and base pointer register.
10. What kind of support does 80286 access in protected mode?
A. Real mode
B. Address access
C. Data access
D. Virtual memory
Answer: D
In the protected mode of 80286, two additional register arises which is called the index register and base pointer register. This allows the 80286 to support a virtual memory scheme.
