A Level Computing - Modes of Address

What mode of addressing is shown in the image?

• Immediate Addressing

• Direct Addressing

• Indirect Addressing

• Index Addressing

What mode of addressing is shown in the image?

• Immediate Addressing

• Direct Addressing

• Indirect Addressing

• Index Addressing

Which of the following best describes immediate addressing?

• The operand of an instruction refers directly to a location in memory.

• The address of the data is held in an intermediate location so that the address is first ‘looked up’ and then used to locate the data itself.

• The data to be used is hard-coded into the instruction itself.

• The final address for the data is determined by adding an offset to a base address.

A machine code instruction is shown here. Which part of the instruction represents the OPERAND?

• Part A

• Part B

• Part C

• Part D

Which of following would be result of this assembly language instruction?

LDA #7

• Load the accumulator with 7

• Load the accumulator with the contents of memory location 7

• Add 7 to the accumulator and retrieve the data from that address

• Go the memory location 7 and retrieve the data from the memory location stored there

Which of following would be result of this assembly language instruction?

LDA [100]

• Load the accumulator with 100

• Load the accumulator with the contents of memory location 100

• Add 100 to the accumulator and retrieve the data from that address

• Go the memory location 100 and retrieve the data from the memory location stored there

Which of following would be the result of this assembly language instruction?

LDA &100

• Load the accumulator with 100

• Load the accumulator with the contents of memory location 100

• Add 100 to the accumulator and retrieve the data from that address

• Go the memory location 100 and retrieve the data from the memory location stored there

What would be result of the following assembly language instruction? LDA 1002,[2]

• 1004

• 50

• 90

• 1000

Which of the following statements are NOT correct? (select as many as appropriate)

• Direct Addressing is the fastest mode of addressing

• Indexed Addressing is ideal for using with arrays

• Immediate Addressing returns the address where the data is stored

• Indirect Addressing is ideal for loading pre-generated libraries and procedures

What mode of addressing is shown in the following assembly language instruction:

MOV B, @2001

• Immediate

• Direct

• Indexed

• Indirect