A. Storing data and performing a logical operation
B. Storing data and performing an arithmetic operation
C. Storing address
D. Pointer
Answer: B
The accumulator is used for all the arithmetic operations such as addition, subtraction, multiplication, relational, logic, etc. It is also used for storage.
22. Which of the following is the area of memory that is used for storage?
A. Register
B. Stack
C. Accumulator
D. Memory
Answer: B
The stack can be used at the time of function call or it is a short time large scale storage of data. Therefore, the stack is the area within memory for storage.
23. How a stack is accessed?
A. Stack pointer
B. Stack address
C. Stack bus
D. Stack register
Answer: A
A stack pointer is a special register that indexes into the stack.
24. PUSH-POP mechanism is seen in _______
A. Stack pointer
B. Register
C. Memory
D. Index register
Answer: A
A stack pointer is used to store data like subroutine calls in which a push-pop mechanism is followed. Data is pushed into the stack to store it and popped off to retrieve it.
25. 8 bits equals ________
A. 128 bytes
B. 64 bytes
C. 256 bytes
D. 32 bytes
Answer: C
28 = 256 by which bytes are calculated.
26. What is the address range in 80286?
A. 1 Mbytes
B. 2 Mbytes
C. 16 Mbytes
D. 32 mbytes
Answer: C
80286 is a 16-bit processor. So it has an address range of 16 Mbytes.
27. Which is the first 32-bit member of Intel?
A. 8086
B. 8088
C. 80286
D. 80386
Answer: D
The new generation of Intel starts with 80386 which has 32-bit registers.
28. What supports multitasking in 80386?
A. Read mode
B. External paging memory management unit
C. Paging and segmentation
D. On-chip paging memory management unit
Answer: D
Because of the efficient paging mechanism of 80386 in the memory management unit, it supports multitasking that is, different tasks can be done at a time, a kind of parallel porting.
29. 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.
30. 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.
