0 — Test 301

Correct Answer: B. B. 1911

Correct Answer: A. A. 21
Explanation: Pakistan's share in cotton industries during partition was 16%.

Correct Answer: A. A. Tax barrier

Correct Answer: D. D. All of the mentioned
Explanation: An Operating System acts as an intermediary between user/user applications/application programs and hardware. It is a program that manages hardware resources. It provides services to application programs.

Correct Answer: A. A. To get and execute the next user-specified command
Explanation: The main function of command interpreter is to get and execute the next user-specified command. Command Interpreter checks for valid command and then runs that command else it will throw an error.

Correct Answer: D. D. All of the mentioned
Explanation: In Operating Systems, CPU scheduling algorithms are: i) First Come First Served scheduling ii) Shortest Job First scheduling iii) Priority scheduling iv) Round Robin scheduling v) Multilevel Queue scheduling vi) Multilevel Feedback Queue scheduling All of these scheduling algorithms have their own advantages and disadvantages.

Correct Answer: B. B. System calls
Explanation: To access services of the Operating System an interface is provided by the System Calls. Generally, these are functions written in C and C++. Open, Close, Read, Write are some of most prominently used system calls.

Correct Answer: B. B. Multiprogramming operating systems

Correct Answer: D. D. All of the mentioned
Explanation: All the mentioned errors are handled by OS. The OS is continuously monitoring all of its resources. Also, the OS is constantly detecting and correcting errors.

Correct Answer: A. A. Either low or high memory (depending on the location of interrupt vector)