System Calls and API in Programming

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What makes the API provide greater program portability between different systems?

Indirect system calls (correct)

Access to a system call table

Direct system calls

Specific numbered system calls

How are specific numbered system calls accessed?

Via the system call table (correct)

By pushing parameters onto the stack

Through passing parameters in registers

By the caller knowing how the system call is implemented

Which method can be used to pass parameters to the OS if the parameters are large blocks?

Pushing parameters onto the stack

Using the system call table

Sending the address of the block in a register (correct)

Passing parameters in registers

What does the caller need to know about during the execution of a system call?

The specific numbered system call Signup and view all the answers

Which category would the 'create process' system call fall under?

Process Control Signup and view all the answers

What is used to invoke a particular service routine for a specific system call?

System Call Table Signup and view all the answers

What is one of the strategies for interfacing with the operating system mentioned in the text?

Implementing system calls through a GUI Signup and view all the answers

How does a command interpreter typically execute a command according to the text?

By jumping to a specific section of its code Signup and view all the answers

In what way can new commands be easily added to a command interpreter without disrupting it?

By creating new functions that can be loaded and executed Signup and view all the answers

What analogy does the text use to describe how a GUI provides an interface to the operating system?

Mouse-based window-and-menu system Signup and view all the answers

Which of the following best describes how a GUI allows users to interact with the operating system?

By clicking on screen icons and menus Signup and view all the answers

What is the main purpose of system calls according to the text?

To provide an interface to the services of the operating system Signup and view all the answers

What programming languages are commonly used to write system calls?

C and C++ Signup and view all the answers

What is the purpose of the first system call mentioned in the text?

Writing a message on the screen Signup and view all the answers

What does the program do if it can't find or access the input file?

Prints a message on the console and terminates abnormally Signup and view all the answers

Why do most programmers not use low-level system calls directly?

Instead they use an Application Programming Interface (API) Signup and view all the answers

What is the purpose of the system call mentioned after opening both input and output files?

Read from the input file Signup and view all the answers

Why may a program terminate abnormally according to the text?

If there is no file of that name or access is denied Signup and view all the answers

System Calls and API in Programming

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