4.7.3.2-4 The FDE Cycle & Instruction Set & Addressing Modes

Which generation of computing languages is represented by machine code?

• First

• Second

• Third

• Fourth

Answer explanation

Machine code is the lowest level of programming language, directly executed by the computer's CPU. It represents the first generation of computing languages, making 'First' the correct answer.

What is the main characteristic of imperative languages?

• Code is executed line by line in a programmer-defined sequence

• Code is executed in parallel

• Code is executed randomly

• Code is executed based on user input

Answer explanation

The main characteristic of imperative languages is that code is executed line by line in a programmer-defined sequence, allowing for clear control over the flow of execution.

Which of the following is an example of a high-level programming language?

• Machine Code

• Assembly Code

• Visual Basic

• Binary Code

Answer explanation

Visual Basic is a high-level programming language designed for ease of use and readability, unlike Machine Code, Assembly Code, and Binary Code, which are low-level languages that are closer to machine language.

What does the assembly code instruction "ADD #42" do?

• Adds the number 42 to the contents of the accumulator

• Loads the number 42 into the accumulator

• Saves the accumulator result to memory address 42

• Subtracts 42 from the contents of the accumulator

Answer explanation

The instruction 'ADD #42' adds the immediate value 42 to the current contents of the accumulator, updating it with the new sum. This is why the correct choice is 'Adds the number 42 to the contents of the accumulator'.

What is the purpose of syntax highlighting in source code editors?

• To color the code depending on what it does

• To execute the code faster

• To compile the code

• To debug the code

Answer explanation

Syntax highlighting helps improve code readability by coloring different elements based on their function, such as keywords, variables, and strings. This visual differentiation aids developers in understanding and navigating the code more efficiently.

Which generation of computing languages includes SQL and CSS?

• First

• Second

• Third

• Fourth

Answer explanation

The fourth generation of computing languages includes high-level languages designed for database management and web design, such as SQL (Structured Query Language) and CSS (Cascading Style Sheets), making 'Fourth' the correct answer.

What is the equivalent of the given assembly code in VB.NET?

• x = 23 + 42

• x = 23 - 42

• x = 23 * 42

• x = 23 / 42

Answer explanation

The assembly code likely performs an addition operation, as indicated by the correct answer choice. Therefore, the equivalent VB.NET code is 'x = 23 + 42', which matches the operation of adding the two numbers.

What are the two main parts of an instruction?

• Opcode and Operands

• Address and Data

• Memory and Register

• Operation and Function

Answer explanation

The two main parts of an instruction are the Opcode, which specifies the operation to be performed, and the Operands, which provide the data or addresses needed for that operation. Thus, 'Opcode and Operands' is the correct answer.

What does the opcode specify in an instruction?

• The data to be used

• The memory address

• The operation to be performed

• The register involved

Answer explanation

The opcode in an instruction specifies the operation to be performed, indicating what action the CPU should execute, such as addition or subtraction. It does not specify data, memory addresses, or registers.

Which of the following is an example of an arithmetic operation opcode?

• LOAD

• JMP

• ADD

• CALL

Answer explanation

The opcode 'ADD' represents an arithmetic operation, specifically for addition. In contrast, 'LOAD', 'JMP', and 'CALL' are related to data movement and control flow, not arithmetic operations.