1 The output of a NOT gate is always: A The same as its input B The complement of its input C HIGH regardless of input D LOW regardless of input
2 Which OSI layer is closest to the user and provides network services to applications? A Application layer B Presentation layer C Session layer D Transport layer
3 In computing systems, how are negative integers commonly represented? A Sign-magnitude B One's complement C Two's complement D Excess-3 code
4 In Boolean algebra, the AND operation is represented by which symbol? A A dot (·) B A plus sign (+) C A bar over the variable D An asterisk (*)
6 The output of an OR gate is 0 when: A Any input is 1 B All inputs are 0 C All inputs are 1 D One input is 1 and the other is 0
7 Sharing troubleshooting knowledge with others helps to: A Assist others and build teamwork B Hide solutions from everyone C Increase hardware faults D Delete useful data
8 What is a protocol in computer networking? A A set of rules for communication B A type of cable C A hardware device D A software application
9 What is a common software issue that can often be fixed by restarting the computer? A Temporary system freeze B Broken monitor screen C Faulty RAM module D Loose power cable
10 Utility programs are a part of which software category? A System software B Application software C Programming software D None of the above
11 Which of the following is an example of a social system? A A school B A rock C A river D A computer
13 Which of the following is a basic hardware-related issue? A Loose cable connection B Corrupted operating system file C Outdated antivirus software D Improper browser settings
14 What are the two possible values of a binary variable? A 1 and 2 B 0 and 1 C True and False only D High and Low voltage only
15 What is the first step in the systematic troubleshooting process? A Identify the problem B Test the theory C Document findings D Implement the solution
16 What does the final step of documenting findings help with? A Future troubleshooting and knowledge sharing B Increasing the computer's speed C Reducing the need for backups D Replacing hardware components
17 Which of the following is a spreadsheet software? A Microsoft Word B Microsoft Excel C Adobe Photoshop D Windows
19 Which resource is useful for troubleshooting a rare software error? A Online documentation and help forums B Ignoring all error messages C Removing the operating system D Turning off the monitor
20 Which transmission mode allows data to flow in both directions simultaneously? A Simplex B Half-duplex C Full-duplex D Broadcast
21 Which OSI model layer is responsible for routing packets between networks? A Data Link Layer B Network Layer C Transport Layer D Session Layer
22 Which device is used to connect a wireless device to a wired network? A Switch B Router C Access Point D Modem
23 What is the primary objective of a system? A To create confusion B To achieve a specific goal C To waste resources D To work randomly
24 What should be done after implementing a solution to a problem? A Verify full system functionality B Ignore the system C Remove all backups D Change the operating system
25 In a Karnaugh map, adjacent cells differ by how many variable(s)? A One B Two C Three D All variables