Assembly language

What is the role of the index register (IX) in data movement operations?

• It is used to perform bitwise logic operations.
• It holds temporary data during various operations.
• It is used to calculate memory addresses for indexed addressing.
• It directly specifies the address for loading data.

Compare and contrast the LDD, LDI, and LDX instructions with examples.

• LDX: Loads the value from the address calculated by adding the index register to the given address.
• LDI: Loads the value from the address stored at the provided address.
• LDD: Loads the value from the directly specified address.
• All of the above.

What factors should be considered when choosing a data movement instruction for a specific scenario?

• Data type, access frequency, and cache size
• Data type, access frequency, and performance requirements
• Data type, access frequency, and register count
• Data type, access frequency, and memory size

Describe the role of memory in data movement operations.

• Both of the above.
• Loading instructions fetch data from memory to registers for processing, while storing instructions write data back to memory.
• Memory serves as the primary storage for data.
• None of the above.

Which data movement instruction is used to load the value from the address stored at the provided address?

• LDI
• LDX
• LDD
• All of the above

Explain the purpose of the OUT instruction.

• The OUT instruction reads a character entered at the keyboard and stores its ASCII value in the accumulator.
• The OUT instruction displays a character on the screen.
• The OUT instruction performs a bitwise AND operation.
• The OUT instruction performs a bitwise OR operation.

How does the IN instruction work in the given example processor?

• The IN instruction performs a bitwise AND operation.
• The IN instruction performs a bitwise OR operation.
• The IN instruction displays a character on the screen.
• The IN instruction reads a character entered at the keyboard and stores its ASCII value in the accumulator.

How does the OUT instruction differ from the IN instruction?

• The OUT instruction reads a character entered at the keyboard and stores its ASCII value in the accumulator.
• The OUT instruction performs a bitwise OR operation.
• The OUT instruction displays a character on the screen.
• The OUT instruction performs a bitwise AND operation.

What are the considerations when choosing a data movement instruction for a specific scenario?

• Factors include the data type, access frequency, and register count.
• Factors include the data type, access frequency, and memory size.
• Factors include the data type, access frequency, and performance requirements.
• Factors include the data type, access frequency, and cache size.

Explain the use of the accumulator (ACC) and index register (IX) in data movement instructions.

• The index register is used to calculate memory addresses for indexed addressing.
• The accumulator is a general-purpose register used for holding temporary data during various operations.
• Both of the above.
• None of the above.