24. OCR A Level (H046-H446) SLR5 – 1.2 Translators

What is the purpose of translators in programming?

• To protect source code from unauthorized access

• To enhance the speed of program execution

• To debug programs

• To convert source code into machine code

Answer explanation

Translators in programming are used to convert source code into machine code, making it understandable by the computer for execution.

Which of the following is NOT a type of translator?

• Interpreter

• Compiler

• Debugger

• Assembler

Answer explanation

The correct choice is 'Debugger' because it is not a type of translator. Interpreters, compilers, and assemblers are all types of translators used in computing.

What is source code?

• A special code used by compilers only

• A type of machine code

• Binary code that machines understand

• Code written by programmers in a programming language

Answer explanation

Source code refers to the code written by programmers in a programming language, which is then translated into machine code by compilers.

What is machine code?

• Code used by interpreters

• Pure binary form that machines can execute

• Code written by programmers

• High-level programming language

Answer explanation

Machine code is the pure binary form that machines can directly execute, representing instructions and data in a format that the computer's central processing unit (CPU) can understand and process.

What does an assembler translate?

• Machine code to source code

• High-level language to machine code

• Source code to high-level language

• Assembly code to machine code

Answer explanation

An assembler translates assembly code to machine code, making it the correct choice among the options provided.

How does an interpreter translate high-level language code?

• In its entirety at once

• Converts it directly to assembly code

• Only after checking all syntax errors

• One line at a time

Answer explanation

The interpreter translates high-level language code one line at a time, executing each line before moving on to the next, allowing for immediate feedback and error detection.

What is the role of a compiler?

• To translate machine code into source code

• To convert entire source code into machine code at once

• To interpret high-level language into assembly code

• To execute code line by line

Answer explanation

The role of a compiler is to convert entire source code into machine code at once.

What is assembly code?

• An error in source code

• Code that is close to machine code but readable by humans

• Machine code

• A high-level programming language

Answer explanation

Assembly code is code that is close to machine code but readable by humans, making it easier for programmers to understand and work with compared to machine code.

What happens if there's a syntax error in a program being compiled?

• The compiler corrects the error automatically

• The compiler executes the program partially

• The compiler ignores the error

• The compiler stops and reports the error

Answer explanation

The compiler stops and reports the error, it does not correct, execute partially, or ignore the error.

What is the outcome of successful compilation?

• Source code

• Machine code

• Assembly code

• Interpreted code

Answer explanation

Successful compilation results in the generation of machine code, which is the binary representation of the program that can be executed by the computer directly.