Operating System MCQ SET-1

Q.1 What is the primary function of an operating system?

• A) Word processing
• B) Process and Memory Management
• C) Calculation
• D) None of these

Q.2 What is the full form of DOS?

• A) Disk operating system
• B) Disk orientation system
• C) Disk original System
• D) None of these

Q.3 Which of the following is an example of an operating system?

• A) MS Word
• B) MS-DOS
• C) MS EXCEL
• D) None of these

Q.4 A file is a collection of?

• A) Data
• B) Information
• C) Both A & B
• D) None of these

Q.5 Which of the following is classified as system software?

• A) Utilities
• B) Compiler
• C) Operating system
• D) All of these

Q.6 An operating system maintains the page table for?

• A) Each address
• B) Each process
• C) Instruction
• D) None of these

Q.7 Semaphores are primarily used for solving which problem?

• A) Process management
• B) Priority
• C) Synchronization
• D) None of these

Q.8 What does the acronym SJF stand for?

• A) Shortest Job Fit
• B) Shortest Job Fire
• C) Shortest Job First
• D) None of these

Q.9 Which of the following is a characteristic supported by Linux?

• A) More than one file
• B) Less than one file
• C) One
• D) None of these

Q.10 The Banker's algorithm is specifically used for?

• A) Deadlock removal
• B) Deadlock avoidance
• C) Both A & B
• D) None of these

Q.11 How many bytes are in 1 Megabyte (MB)?

• A) 2^20 bytes
• B) 3^20 bytes
• C) 1024 bytes
• D) None of these

Q.12 1 Terabyte (TB) is equal to?

• A) 1024 MB
• B) 512 GB
• C) 1024 GB
• D) None of these

Q.13 In terms of licensing, Linux is considered?

• A) Open source
• B) Closed source
• C) Copyright
• D) None of these

Q.14 In terms of licensing, early UNIX versions are typically considered?

• A) Open source
• B) Closed source
• C) Copyright
• D) None of these

Q.15 What are the possible values of a Binary Semaphore?

• A) 2, 1
• B) 0, 2
• C) 0, 1
• D) None of these

Q.16 Running multiple programs at the same time is known as?

• A) Batch OS
• B) Multitasking
• C) Real time
• D) None of these

Q.17 What is the definition of Multiprogramming?

• A) More than one program running on CPU
• B) More than one program loaded into main memory
• C) Both
• D) None of these

Q.18 In certain memory management schemes, 'Process size = partition size' is a valid condition.

• A) True
• B) False
• C) Both
• D) None of these

Q.19 The wastage of memory in a computer system is called?

• A) Fragmentation
• B) External fragmentation
• C) Internal fragmentation
• D) None of these

Q.20 In process scheduling, WT (Waiting Time) is calculated as?

• A) WT = TAT - CT
• B) TAT - BT
• C) TAT - AT
• D) None of these