Fundamentals of Computer Architecture Quiz

In this question, the correct answer explains that IR stands for instructive register and its function, which is to hold an instruction code. The incorrect answers provide plausible but incorrect interpretations of the abbreviation IR, leading to confusion and requiring a solid understanding of the correct definition.

The correct answer refers to the AC as an accumulator, which is a general purpose register used in computer programming to store intermediate results and variables during arithmetic and logic operations.

The correct answer includes opcode, address field, and mode field, which are essential components of an instruction set architecture in computing.

The opcode primarily specifies the operation to be performed in a computer program, it does not store the result, memory address, or sequence of program execution.

The Address field typically specifies a memory address and is used to locate data in a computer's memory. The number of bits in the address can determine the size of memory that can be accessed.

The correct answer specifies that the mode field determines how the address of the field is interpreted, not the data type, size, or processing order of the field.

The correct groups are Memory-reference instructions, Register-reference instructions, and I/O instructions. Each group pertains to the type of component being accessed by the instruction.

Memory reference instructions specifically deal with accessing memory units and does not involve performing arithmetic operations, controlling input/output devices, or modifying the program counter.

Register reference specifically pertains to instructions that access registers within the CPU, not memory. It is not related to networking protocols or user login counts.

I/O operations are primarily responsible for interacting with peripherals, accessing hardware registers, and executing specific instructions defined by opcodes. While I/O can involve data processing, its main purpose is not complex mathematical calculations, memory management, or generating random numbers for encryption.

The CLA instruction specifically clears the accumulator register (AC) to the value 7800. It does not perform addition, multiplication, or comparison operations.

The correct answer states that the CMA instruction complements AC-7200, indicating a relationship between the two.

I/O instructions consist of input operation and output operation components where data is either read from or written to an external device.

The correct types of instructions that must be included in a computer are related to its core functions such as processing data, controlling operations, managing memory, and interacting with input/output devices.

Control expression and timing involve the execution of programs, sequencing of instructions, and utilization of opcode micro operations. Options related to memory management, input/output operations, and compilation/debugging processes are not part of control expression and timing.

In controlled expression, the timing signal is always required while the I-bit, opcode, and address field can be optional depending on the specific context.

The correct phases of the instruction cycle are essential steps that a processor follows to execute a program. Each phase has a specific function contributing to the overall functioning of the processor.

The correct control expressions for T0, T1, T2 are as follows: T0 involves addressing MAR to pc and pc+1 to pc. T1 includes transferring memory [mar] to the instruction register(ir) and memory of pc to IR. T2 involves transferring IR (1-14) to MAR.

The control expression T3 ID'7 retrieves the effective direct memory reference address, allowing for efficient memory operations.

Control expressionT3 I' D7 is a command that is used to execute the I/) instructional format, not to modify D7 instruction, terminate program execution or display an error message.