Mastering Computers: 20 Challenging MCQs to Test Your Knowledge
Computers have become an integral part of our personal and professional lives, yet their underlying concepts and systems often remain complex. For students preparing for competitive exams or professionals looking to sharpen their knowledge, here are 20 carefully curated multiple-choice questions (MCQs) designed to test your understanding of fundamental computer topics. These questions cover areas like operating systems, computer hardware, software, networking, security, and more.
Each question is crafted to be challenging and highlight common misconceptions, ensuring you don’t just memorize but truly understand the concepts. Let's dive in!
1. Which of the following statements about cache memory is false?
a) Cache memory is faster than RAM.
b) Cache memory stores frequently accessed data.
c) Cache memory is non-volatile. ✅
d) Cache memory improves CPU performance.
2. What is the primary reason for the decline in the use of vacuum tubes in first-generation computers?
a) Limited availability of vacuum tubes
b) High electricity consumption and heat production ✅
c) Lack of processing power
d) Difficulty in understanding binary logic
3. Which of the following is not a task performed by the operating system?
a) Memory management
b) Virus scanning ✅
c) File system management
d) Process scheduling
4. Which of the following accurately describes a system bus?
a) A device used to connect external peripherals
b) A pathway for data transfer between components ✅
c) A network topology
d) A software utility
5. What does the acronym POST stand for in computing?
a) Power-On Self-Test ✅
b) Pre-Operating System Test
c) Primary Operating System Terminal
d) Power-Off Safety Tool
6. Which of the following is true about ROM?
a) It is volatile memory.
b) It can only be written to once. ✅
c) It stores data temporarily during processing.
d) It is faster than cache memory.
7. What is the primary purpose of the kernel in an operating system?
a) It manages the user interface.
b) It handles file permissions.
c) It manages core system operations like process and memory management. ✅
d) It connects the computer to external devices.
8. Which one of these types of software is not system software?
a) Compiler
b) Antivirus ✅
c) Device driver
d) Operating system
9. Which of the following is true about virtual memory?
a) It is faster than physical memory.
b) It uses a portion of the hard drive to simulate RAM. ✅
c) It is another term for cache memory.
d) It eliminates the need for physical RAM.
10. What is the difference between IPv4 and IPv6?
a) IPv4 uses 128-bit addressing, while IPv6 uses 32-bit addressing.
b) IPv4 supports unlimited addresses, whereas IPv6 is limited.
c) IPv4 uses 32-bit addressing, while IPv6 uses 128-bit addressing. ✅
d) IPv4 is used for public networks, and IPv6 is used for private networks.
11. What happens during a page fault in memory management?
a) The page is found in the main memory.
b) The page is replaced in the cache.
c) The required page is not found in memory and must be fetched from the disk. ✅
d) The process terminates due to an error.
12. Which of the following statements about SSDs is incorrect?
a) SSDs are faster than HDDs.
b) SSDs use mechanical parts to store data. ✅
c) SSDs are more expensive than HDDs.
d) SSDs are less prone to physical damage than HDDs.
13. Which of the following is a disadvantage of symmetric encryption?
a) It requires different keys for encryption and decryption.
b) It is slower than asymmetric encryption.
c) Key distribution is challenging. ✅
d) It is less secure than asymmetric encryption.
14. Which of the following is not a type of computer port?
a) HDMI
b) FTP ✅
c) USB
d) Ethernet
15. What is the purpose of the BIOS in a computer system?
a) To initialize the operating system after booting.
b) To provide a runtime environment for software applications.
c) To perform hardware initialization during startup. ✅
d) To manage software processes.
16. Which of these scheduling algorithms can lead to starvation of processes?
a) Round Robin
b) First-Come, First-Served
c) Shortest Job Next ✅
d) Multilevel Queue Scheduling
17. What is the purpose of the ARP protocol?
a) It translates domain names to IP addresses.
b) It maps MAC addresses to IP addresses. ✅
c) It manages packet routing between networks.
d) It encrypts data for secure communication.
18. What is the significance of "chmod 777" in Linux?
a) It denies all permissions to a file.
b) It provides read, write, and execute permissions to everyone. ✅
c) It changes the owner of the file to "root."
d) It restricts a file to read-only mode.
19. Which file system is primarily used by Linux-based operating systems?
a) NTFS
b) FAT32
c) ext4 ✅
d) HFS+
20. Which of the following statements about phishing is true?
a) It is a type of firewall used to secure networks.
b) It is a method of data encryption.
c) It is an attempt to obtain sensitive information by pretending to be a trustworthy entity. ✅
d) It is a process of recovering lost data.
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