Question 1 -- /6 Which one of the followings is not the goals of OS? 1 Use the computer hardware efficiently 2) Execute user programs 3 Manage data transmission over internet 4 4 Make the computer easy to use Question 2 -- /6 Which of the following statements is correct? An operating system provides an environment for the execution of programs 2 An operating system manages system resources 3 Operating systems must provide both protection and security 4 All of the above None of the above Question 3 -- / 6 to Application programmers typically use access the services provided by OS? 1 API 2 None of them 3 System Calls 4. Both of them Question 4 -- /6 In which mode does System calls run? 1 Only the kernel mode 2 Both the kernel and user modes 3 Only the user mode