Question: ............ translates and executes program at run time line by line

Answer:

The process of translating and executing a program line by line at runtime is known as "Interpreting."

An interpreter is a program or software component that reads and interprets the source code of a program, typically written in a high-level programming language. Instead of translating the entire program into machine code before execution (as done in compiled languages), an interpreter processes the code line by line or statement by statement at runtime.

When an interpreter executes a program, it reads each line or statement, translates it into machine code or bytecode, and immediately executes it. This process is repeated sequentially for each line or statement in the program.

Interpreted languages, such as Python, JavaScript, and Ruby, rely on interpreters to execute their programs. The interpreter dynamically converts each line of code into machine-readable instructions and carries out the desired actions. This approach allows for flexibility and ease of development, as changes made to the source code can be immediately reflected in the program's behavior without the need for a separate compilation step.

While interpreting code can be slower compared to pre-compiled code, interpreters offer advantages such as ease of debugging, platform independence, and the ability to dynamically modify and execute code during runtime. Interpreted languages are often used for scripting, rapid prototyping, and applications where flexibility and interactivity are important.