Computer — All MCQs
4795 questions available
Q3841.In a communication system, which hardware device is responsible for encoding and transmitting signals over a channel?
Correct Answer: C
The transmitter is the primary component that converts source information into electromagnetic waves for transmission over a channel.
Q3842.What are the core processing operations executed by a standard computer architecture?
Correct Answer: D
Computers execute 5 basic operations: input, processing (arithmetic and logic), output, storage/retrieval, and control system operations.
Q3843.Which physical hardware resource is most commonly shared as a common network resource among multiple workstation clients?
Correct Answer: A
Sharing physical printers over local networks (LANs) allows offices to cut down hardware acquisition and maintenance costs.
Q3844.The Central Processing Unit (CPU) of a computer contains which primary internal components?
Correct Answer: C
The CPU's execution core consists of the Control Unit (which decodes instructions) and the ALU (which performs calculations).
Q3845.What type of user interface does the MS-DOS operating system utilize?
Correct Answer: A
MS-DOS is a text-based, single-tasking operating system that requires users to type commands manually at a command prompt.
Q3846.What do you call a light-sensitive input device that scans and converts physical drawings, text, or photos into digital image formats?
Correct Answer: B
A scanner uses light-sensitive sensors (such as CCDs) to capture physical visual data and convert it into digital bitmap representations.
Q3847.In Microsoft Excel, what keyboard shortcut is used to select the entire column of the currently active cell?
Correct Answer: C
Ctrl + Spacebar highlights the entire vertical column, whereas Shift + Spacebar selects the entire horizontal row.
Q3848.A small, malicious computer program specifically written to interfere with the normal operations of a computer is called a ______?
Correct Answer: A
A computer virus is a self-replicating program written to disrupt system operations, corrupt data, or compromise security.
Q3849.On a computer motherboard, what is the primary purpose of the CMOS battery?
Correct Answer: B
The CMOS battery powers the CMOS chip, ensuring the system clock (date/time) and BIOS hardware settings are not lost when power is disconnected.
Q3850.Which application is most commonly suggested to accounting departments to calculate monthly salaries, budgets, and balance sheets?
Correct Answer: C
Microsoft Excel provides dedicated spreadsheets, multi-variable formulas, financial functions, and pivot tables ideal for accounting tasks.
Q3851.In the specialized NIS Data Entry application, what function does the F7 hotkey perform?
Correct Answer: B
In the NIS application, pressing F7 automatically populates the permanent address fields with the values entered in the current address fields.
Q3852.In computer architectures, data is stored or modified within Random Access Memory (RAM) during which hardware process?
Correct Answer: B
A write operation is the process where the CPU writes or updates binary data stored in specific memory registers or RAM addresses.
Q3853.In spreadsheet applications like Excel, how is an individual cell defined?
Correct Answer: A
A cell is the basic storage coordinate in a spreadsheet, formed by the intersection of a horizontal row and a vertical column.
Q3854.Alphabet Inc. is widely known as the parent organization of which multinational technology giant?
Correct Answer: B
Alphabet Inc. was established as the restructured parent company of Google and several adjacent subsidiaries on October 2, 2015.
Q3855.When a new software program or application is launched on Windows, where do its active application buttons appear?
Correct Answer: B
The Windows Taskbar (usually located at the bottom of the screen) displays active buttons for all running applications.
Q3856.In web terminology, what does the abbreviation 'URL' stand for?
Correct Answer: C
URL stands for Uniform Resource Locator, representing the unique global address used to identify resources on the web.
Q3857.Which symbol is standard across most computer programming languages to indicate mathematical multiplication?
Correct Answer: C
The asterisk (*) represents multiplication in C, C++, Python, Java, and Excel formulas (e.g., 5 * 3).
Q3858.Which of the following is an application suite rather than a computer operating system?
Correct Answer: C
macOS and Android are operating systems that manage hardware resources. Microsoft Office is a productivity application suite.
Q3859.What represents the most prominent ethical concern regarding the large-scale deployment and training of AI systems?
Correct Answer: A
AI systems trained on historical datasets can inherit and amplify human biases, leading to unfair decisions in hiring or credit approval.
Q3860.In Adobe's Photoshop, which AI-powered tool allows users to generate or extend complex backgrounds using text commands?
Correct Answer: B
Generative Fill utilizes Adobe Firefly AI to let users generate, add, or remove image elements using natural language text prompts.