Computer Basics
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Q501.Which device serves as both an input and output device by translating digital computer data into analog signals and vice versa?
Correct Answer: A
A Modem (Modulator-Demodulator) converts outgoing digital data to analog signals (modulation) and incoming analog signals to digital data (demodulation).
Q502.Which specialized output device is used in engineering and CAD environments to print large-scale, continuous-line technical drawings?
Correct Answer: B
Plotters draw continuous lines using specialized pens or inkjet nozzles, making them ideal for precise, large-scale CAD maps and designs.
Q503.A USB Flash Drive acts as which type of physical hardware component?
Correct Answer: C
A flash drive is a storage medium. It serves as input when reading files to a computer, and as output when writing files from a computer to the drive.
Q504.Which type of computer memory is designed to permanently retain its stored data and instructions even when electrical power is completely removed?
Correct Answer: A
Non-volatile memory (e.g., ROM, flash drives, HDDs) retains data permanently without requiring a continuous power supply.
Q505.In modern, multi-core computer architectures, how are program instructions executed?
Correct Answer: C
Modern computing supports parallel execution across multiple processor cores alongside sequential execution for step-by-step logic.
Q506.What are the three fundamental components that make up a Microcomputer system?
Correct Answer: A
At a structural level, any microcomputer requires a processing unit (CPU), interface peripherals (I/O), and memory/storage media.
Q507.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.
Q508.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).
Q509.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.
Q510.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.
Q511.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.
Q512.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.
Q513.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.
Q514.The primary storage memory of a computer is commonly measured in Kilobytes or Megabytes. A single byte consists of exactly how many binary digits?
Correct Answer: B
A byte is a unit of digital data that consists of exactly 8 bits (binary digits 0 or 1).
Q515.On a computer hardware architecture, the key components that process data (like the CPU and registers) are physically housed inside the ______?
Correct Answer: A
The system unit is the main enclosure or chassis that houses the central motherboard, CPU, RAM, and internal storage devices.
Q516.One Kilobyte (1 KB) in computer memory is equivalent to exactly how many bytes?
Correct Answer: B
In binary computing, memory capacity is measured in powers of two. 1 Kilobyte is 2^10 = 1024 bytes.
Q517.Which electronic component serves as the most basic digital memory device by storing a single bit of binary data?
Correct Answer: C
A flip-flop (or latch) is a bistable multivibrator circuit used in computer registers and static memory to store a single bit (0 or 1).
Q518.What term is used in computer science to denote raw data that has been processed, structured, and presented in a meaningful format?
Correct Answer: A
Raw data represents unorganized facts. Once compiled, processed, and organized into a meaningful context, it becomes Information.
Q519.In Android software engineering, what represents the primary difference between a Service and a Thread?
Correct Answer: B
An Android Service is a background component with no UI that, by default, executes on the application's main thread. Threads are separate tasks.
Q520.Once installed on a mobile device, each individual Android application executes within what isolated environment to preserve security?
Correct Answer: A
Android assigns a unique User ID (UID) to each app, forcing it to execute inside an isolated Security Sandbox to prevent unauthorized data access.