Computer Organization interview questions

1. What is Machine code ?
Machine code is a computer program written in machine language instructions that can be executed directly by a computer’s central processing unit (CPU). Each instruction causes the CPU to perform a very specific task, such as a load, a store, a jump, or an arithmetic logic unit (ALU) operation on one or more units of data in central processing unit (CPU) registers or memory.

2. What is Memory access time ?
Memory access time is how long it takes for a character in RAM to be transferred to or from the CPU. Fast RAM chips have an access time of 10 nanoseconds (ns) or less.

3. What is CISC ?
The term CISC stands for ‘’Complex Instruction Set Computer’’. It is a CPU design plan based on single commands, which are skilled in executing multi-step operations. CISC computers have small programs. It has a huge number of compound instructions, which takes a long time to perform.

4. What is RISC ?
RISC stands for ‘Reduced Instruction Set Computer Whereas, CISC stands for Complex Instruction Set Computer. The RISC processors have a smaller set of instructions with few addressing nodes.

5. What is Standard Performance Evaluation Corporation (SPEC) ?
The Standard Performance Evaluation Corporation (SPEC) is an American non-profit corporation that aims to “produce, establish, maintain and endorse a standardized set” of performance benchmarks for computers. SPEC was founded in 1988. SPEC benchmarks are widely used to evaluate the performance of computer.

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