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Test: Addressing Modes Of 8051


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10 Questions MCQ Test | Test: Addressing Modes Of 8051

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Test: Addressing Modes Of 8051 - Question 1

 Which of the following is not an addressing mode of 8051?

Detailed Solution for Test: Addressing Modes Of 8051 - Question 1

The six addressing modes of 8051 are
1. Direct addressing
2. Indirect addressing
3. Register instructions
4. Register specific(Register Implicit) instructions
5. Immediate mode
6. Indexed addressing.

Test: Addressing Modes Of 8051 - Question 2

The symbol, ‘addr 16’ represents the 16-bit address which is used by the instructions to specify the

Detailed Solution for Test: Addressing Modes Of 8051 - Question 2

 The symbol, ‘addr 16’ represents the 16-bit destination address which is used by the LCALL or LJMP instruction to specify the call or jump destination address, within 64 Kbytes program memory.

Test: Addressing Modes Of 8051 - Question 3

The storage of addresses that can be directly accessed is

Detailed Solution for Test: Addressing Modes Of 8051 - Question 3

Only internal data RAM and SFRS can be directly addressed in direct addressing mode.

Test: Addressing Modes Of 8051 - Question 4

The address register for storing the 16-bit addresses can only be

Detailed Solution for Test: Addressing Modes Of 8051 - Question 4

The address register for storing the 16-bit addresses can only be data pointer.

Test: Addressing Modes Of 8051 - Question 5

 The address register for storing the 8-bit addresses can be

Detailed Solution for Test: Addressing Modes Of 8051 - Question 5

The registers R0 and R1 of the selected bank of registers or stack pointer can be used as address registers for storing the 8-bit addresses.

Test: Addressing Modes Of 8051 - Question 6

The instruction, ADD A, R7 is an example of

Detailed Solution for Test: Addressing Modes Of 8051 - Question 6

In register instructions addressing mode, operands are stored in the registers R0-R7 of the selected register bank. One of these registers is specified in the instruction.

Test: Addressing Modes Of 8051 - Question 7

The addressing mode, in which the instructions has no source and destination operands is

Detailed Solution for Test: Addressing Modes Of 8051 - Question 7

In register specific instructions addressing mode, the instructions donot have source and destination operands. Some of the instructions always operate only on a specific register.

Test: Addressing Modes Of 8051 - Question 8

 The instruction, RLA performs

Detailed Solution for Test: Addressing Modes Of 8051 - Question 8

The instruction, RLA rotates accumulator left.

Test: Addressing Modes Of 8051 - Question 9

The instruction, ADD A, #100 performs

Detailed Solution for Test: Addressing Modes Of 8051 - Question 9

Immediate data 100(decimal) is added to the contents of accumulator.

Test: Addressing Modes Of 8051 - Question 10

In which of these addressing modes, a constant is specified in the instruction, after the opcode byte?

Detailed Solution for Test: Addressing Modes Of 8051 - Question 10

In immediate mode, an immediate data, i.e. a constant is specified in the instruction, after the opcode byte.

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