Computer System Architecture - Central Processing Unit
41. The most appropriate matching for the following pairs
| X. Indirect addressing | 1. Loops |
| Y. Immediate addressing | 2. Pointers |
| Z. Auto decrement | 3. Constant |
- Option : C
- Explanation : In Indirect addressing mode the instruction does
not have the address of the data to be operated
on, but the instruction points where the address
is stored.
In immediate addressing mode the data is to be used is immediately given in instruction it self; so it deals with constant data.
I n Aut o decrement addressing mode, Before determining the effective address, the value in the base register is decremented by the size of the data item which is to be accessed.
- Option : A
- Explanation : In serial data transmission, every byte of data is padded with a ‘0’ in the beginning and one or two ‘1’ at the end of byte because receiver is to be synchronized for byte reception.
- Option : C
- Explanation : For address relocation we can use Based addressing , Relative addressing modes.
| List-I | List-II |
| A. A[I] = B[J] | 1. Indirect addressing |
| B. while [*A++] | 2. Indexed addressing |
| C. int temp = *x; | 3. Autoincrement |
Codes :
| A | B | C | |
| a | 3 | 2 | 1 |
| b | 1 | 3 | 2 |
| c | 2 | 3 | 1 |
| d | 1 | 2 | 3 |
- Option : C
- Explanation : Correct matching:
1. A[1] = B[J] Indexed Addressing Mode 2. While [*A++] Autoincrement 3. int temp = *x; Indirect Addressing Mode
- Option : C
- Explanation : Size of instruction = 24/8 = 3 bytes.
So Program Counter shift 3 bytes at a time to jump to next instruction.According to that the given options must be divisible by 3. only 600 is satisfied.
