1Which component is considered the 'brain' of the computer responsible for executing instructions?
A.Power Supply Unit
B.Hard Disk Drive
C.Random Access Memory (RAM)
D.Central Processing Unit (CPU)
Correct Answer: Central Processing Unit (CPU)
Explanation:
The CPU is the primary component that performs most of the processing inside a computer, executing instructions from hardware and software.
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2The Arithmetic Logic Unit (ALU) is a part of which computer component?
A.Memory Unit
B.CPU
C.Input Unit
D.Secondary Storage
Correct Answer: CPU
Explanation:
The ALU is a fundamental building block of the CPU, responsible for performing arithmetic and logic operations.
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3Which type of memory is volatile, meaning it loses data when power is turned off?
A.ROM
B.Hard Disk
C.RAM
D.Flash Memory
Correct Answer: RAM
Explanation:
RAM (Random Access Memory) is volatile memory used for temporary storage while the computer is running. It requires power to maintain the stored information.
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4What is the primary function of the Control Unit (CU) within the CPU?
A.To direct the flow of data and operation of the processor
B.To display graphics
C.To store permanent data
D.To perform mathematical calculations
Correct Answer: To direct the flow of data and operation of the processor
Explanation:
The Control Unit directs the operation of the processor by telling the computer's memory, arithmetic/logic unit, and input and output devices how to respond to the instructions of the program.
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5Which of the following is a non-volatile memory typically used to store firmware like BIOS?
A.ROM
B.DRAM
C.Cache
D.SRAM
Correct Answer: ROM
Explanation:
ROM (Read-Only Memory) is non-volatile and retains its data even without power, making it ideal for storing essential startup firmware like the BIOS.
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6What is the main difference between Static RAM (SRAM) and Dynamic RAM (DRAM)?
A.DRAM is non-volatile, whereas SRAM is volatile.
B.SRAM must be constantly refreshed, while DRAM does not.
C.DRAM is faster and more expensive than SRAM.
D.SRAM uses flip-flops to hold data and is faster than DRAM.
Correct Answer: SRAM uses flip-flops to hold data and is faster than DRAM.
Explanation:
SRAM is faster and more expensive because it uses flip-flops and doesn't need refreshing, whereas DRAM uses capacitors and requires periodic refreshing.
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7Which memory type acts as a high-speed buffer between the CPU and main memory?
A.Cache Memory
B.DVD-ROM
C.Flash Drive
D.Hard Drive
Correct Answer: Cache Memory
Explanation:
Cache memory is a small, very fast memory location close to the CPU that stores frequently used instructions to speed up processing.
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8In the context of storage, what does SSD stand for?
A.Serial Storage Device
B.Super Speed Drive
C.Solid State Drive
D.System State Disk
Correct Answer: Solid State Drive
Explanation:
SSD stands for Solid State Drive, a storage device that uses integrated circuit assemblies to store data persistently.
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9Which of the following is a mechanical component found in HDDs but not in SSDs?
A.Interface Connector
B.Spinning Platter
C.NAND Gates
D.Controller Chip
Correct Answer: Spinning Platter
Explanation:
HDDs read and write data magnetically on spinning platters using an actuator arm, whereas SSDs have no moving mechanical parts.
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10Which storage technology offers the fastest data access speeds and lower latency?
A.Optical Disc
B.HDD (5400 RPM)
C.HDD (7200 RPM)
D.SSD
Correct Answer: SSD
Explanation:
SSDs use flash memory which allows for significantly faster data access and lower latency compared to the mechanical operation of HDDs and optical discs.
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11What is the primary advantage of an HDD over an SSD?
A.Faster boot times
B.Higher durability against drops
C.Silent operation
D.Lower cost per gigabyte of storage
Correct Answer: Lower cost per gigabyte of storage
Explanation:
Currently, HDDs are generally cheaper to manufacture per unit of storage capacity compared to SSDs, making them cost-effective for massive storage.
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12Which component consists of a specialized electronic circuit designed to manipulate and alter memory to accelerate the creation of images?
A.GPU
B.ALU
C.ROM
D.BIOS
Correct Answer: GPU
Explanation:
The GPU (Graphics Processing Unit) is specialized for parallel processing, specifically for rendering images, video, and graphics.
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13Which interface is commonly used to connect internal hard drives and SSDs to the motherboard?
A.Ethernet
B.SATA
C.HDMI
D.VGA
Correct Answer: SATA
Explanation:
Serial ATA (SATA) is a computer bus interface that connects host bus adapters to mass storage devices like hard drives and optical drives.
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14What type of data does an HDMI cable transmit?
A.Internet data only
B.Analog Video only
C.Digital Audio and Video
D.Power only
Correct Answer: Digital Audio and Video
Explanation:
HDMI (High-Definition Multimedia Interface) transmits uncompressed video data and compressed or uncompressed digital audio data.
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15Which version of USB introduced the reversible Type-C connector?
A.USB 3.1/Type-C specifications
B.USB 1.0
C.USB 2.0
D.USB A
Correct Answer: USB 3.1/Type-C specifications
Explanation:
The USB Type-C connector specification was developed roughly concurrently with USB 3.1, offering a reversible plug design.
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16What is the typical range of NFC (Near Field Communication)?
A.Up to 100 meters
B.Up to 10 meters
C.Unlimited
D.4 cm or less
Correct Answer: 4 cm or less
Explanation:
NFC is designed for very short-range communication, typically requiring devices to be within 4 cm of each other.
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17Which wireless technology is primarily defined by the IEEE 802.15.1 standard for short-range personal area networks?
A.LTE
B.Bluetooth
C.Wi-Fi
D.NFC
Correct Answer: Bluetooth
Explanation:
Bluetooth is a wireless technology standard used for exchanging data between fixed and mobile devices over short distances (Personal Area Networks).
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18What does RAID stand for?
A.Random Access of Independent Disks
B.Redundant Allocation of Internal Data
C.Rapid Access In Drive
D.Redundant Array of Independent Disks
Correct Answer: Redundant Array of Independent Disks
Explanation:
RAID stands for Redundant Array of Independent (or Inexpensive) Disks, a technology used to increase performance and/or reliability of data storage.
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19Which RAID level provides data striping without redundancy?
A.RAID 1
B.RAID 5
C.RAID 10
D.RAID 0
Correct Answer: RAID 0
Explanation:
RAID 0 splits data evenly across two or more disks (striping) to improve performance but offers no fault tolerance (redundancy).
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20What is the primary function of RAID 1?
A.Striping for speed
B.Parity for error checking
C.Concatenation for capacity
D.Mirroring for redundancy
Correct Answer: Mirroring for redundancy
Explanation:
RAID 1 mirrors data across two or more disks. If one disk fails, the data is preserved on the other disk.
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21Which RAID level requires a minimum of three disks and uses distributed parity?
A.RAID 0
B.RAID 5
C.RAID 1
D.RAID 2
Correct Answer: RAID 5
Explanation:
RAID 5 uses block-level striping with distributed parity. It requires at least three disks to function effectively.
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22The speed of a CPU is typically measured in:
A.Megabits (Mb)
B.RPM
C.Gigabytes (GB)
D.Gigahertz (GHz)
Correct Answer: Gigahertz (GHz)
Explanation:
CPU clock speed, which determines how many cycles the CPU can execute per second, is measured in Hertz, typically Gigahertz (GHz) in modern computers.
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23Which of the following is an example of Sequential Access Storage?
A.SSD
B.RAM
C.Magnetic Tape
D.Hard Disk Drive
Correct Answer: Magnetic Tape
Explanation:
Magnetic tape is a sequential access medium, meaning you must fast-forward or rewind through data to get to a specific point, unlike random access devices.
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24What is the main benefit of a Multi-core Processor?
A.It allows for simultaneous execution of multiple tasks (parallel processing).
B.It replaces the need for RAM.
C.It consumes more power.
D.It increases the clock speed of a single task.
Correct Answer: It allows for simultaneous execution of multiple tasks (parallel processing).
Explanation:
Multi-core processors have two or more independent processing units (cores) that read and execute instructions, enabling better multitasking and parallel processing.
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25In a RAID 0 setup with two 500GB drives, what is the total usable storage capacity?
A.250GB
B.750GB
C.500GB
D.1000GB (1TB)
Correct Answer: 1000GB (1TB)
Explanation:
RAID 0 combines the capacity of all drives in the array. Two 500GB drives result in 1TB of total space, but with no redundancy.
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26In a RAID 1 setup with two 1TB drives, what is the total usable storage capacity?
A.1TB
B.1.5TB
C.2TB
D.500GB
Correct Answer: 1TB
Explanation:
RAID 1 mirrors the data. Two 1TB drives store the exact same data, so the usable capacity remains 1TB.
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27Which interface enables 'Plug and Play' capability, allowing devices to be detected immediately upon connection?
A.IDE
B.Serial Port
C.Parallel Port
D.USB
Correct Answer: USB
Explanation:
USB (Universal Serial Bus) supports Plug and Play, allowing the OS to automatically configure and discover new devices without restarting.
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28What is the fundamental storage unit within an SSD called?
A.Track
B.NAND Flash Cell
C.Cylinder
D.Magnetic Sector
Correct Answer: NAND Flash Cell
Explanation:
SSDs store data in NAND Flash memory cells, which are electronic components capable of retaining charge.
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29Which component dissipates heat generated by the processor to prevent overheating?
A.Heat Sink / Fan
B.Northbridge
C.Transistor
D.Capacitor
Correct Answer: Heat Sink / Fan
Explanation:
A heat sink absorbs heat from the CPU, and a fan disperses it, preventing the processor from reaching damaging temperatures.
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30What distinguishes an Integrated GPU from a Discrete GPU?
A.Discrete GPUs are built into the CPU die.
B.Integrated GPUs share system RAM, while Discrete GPUs have dedicated video memory.
C.Integrated GPUs have their own dedicated RAM.
D.Discrete GPUs cannot run 3D games.
Correct Answer: Integrated GPUs share system RAM, while Discrete GPUs have dedicated video memory.
Explanation:
Integrated GPUs use a portion of the computer's main system RAM (shared memory), while discrete GPUs are separate cards with their own dedicated VRAM.
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31Which connector is legacy (older) and primarily used for analog video signals?
A.HDMI
B.VGA
C.USB-C
D.DisplayPort
Correct Answer: VGA
Explanation:
VGA (Video Graphics Array) is an older standard that carries analog video signals, unlike the digital signals of HDMI and DisplayPort.
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32What technology allows a hard drive to notify the computer of a potential failure before it happens?
A.RAID
B.BIOS
C.CMOS
D.S.M.A.R.T.
Correct Answer: S.M.A.R.T.
Explanation:
S.M.A.R.T. (Self-Monitoring, Analysis and Reporting Technology) is a monitoring system included in HDDs and SSDs to detect and report reliability indicators.
EPROM allows the memory to be erased (typically via UV light) and reprogrammed.
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40Which storage interface standard was designed to replace SATA for connecting SSDs to allow faster speeds via the PCIe bus?
A.IDE
B.SCSI
C.NVMe
D.USB 2.0
Correct Answer: NVMe
Explanation:
NVMe (Non-Volatile Memory Express) is a protocol designed specifically for SSDs to utilize the high-speed PCIe bus, overcoming the bottlenecks of the older SATA interface.
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41A GPU is primarily useful for which of the following tasks?
A.Managing background OS tasks
B.Compiling code
C.Rendering 3D video games and video editing
D.Word processing
Correct Answer: Rendering 3D video games and video editing
Explanation:
The parallel architecture of GPUs makes them highly efficient at the complex mathematical calculations required for rendering images and video.
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42Which memory is faster?
A.SSD
B.RAM
C.L2 Cache
D.L1 Cache
Correct Answer: L1 Cache
Explanation:
L1 Cache is located directly on the processor core and provides the fastest access speed of all memory types listed.
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43What is the typical use case for NFC in smartphones?
A.Connecting to a Wi-Fi router from 50m away
B.Storing photos
C.Streaming 4K video to a TV
D.Contactless payments (e.g., Apple Pay, Google Pay)
Correct Answer: Contactless payments (e.g., Apple Pay, Google Pay)
Explanation:
Due to its short range and security features, NFC is the standard technology used for contactless mobile payments.
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44The 'registers' are located inside which component?
A.CPU
B.Hard Disk
C.Monitor
D.RAM
Correct Answer: CPU
Explanation:
Registers are tiny, ultra-fast storage locations directly inside the CPU used to hold instructions and data currently being processed.
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45Which RAID level offers tolerance against the failure of two drives simultaneously?
A.RAID 0
B.RAID 5
C.RAID 1
D.RAID 6
Correct Answer: RAID 6
Explanation:
RAID 6 uses block-level striping with two parity blocks distributed across all member disks, allowing it to withstand two simultaneous drive failures.
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46Which computer generation used Vacuum Tubes?
A.First Generation
B.Second Generation
C.Third Generation
D.Fourth Generation
Correct Answer: First Generation
Explanation:
First-generation computers (roughly 1940-1956) utilized vacuum tubes for circuitry and magnetic drums for memory.
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47What does 'Hot Swappable' mean regarding an interface like USB?
A.The device heats up during use.
B.The device must be cooled before removal.
C.The device requires a specific software driver to heat up.
D.The device can be plugged in or removed without shutting down the computer.
Correct Answer: The device can be plugged in or removed without shutting down the computer.
Explanation:
Hot swapping allows components to be replaced or connected while the computer system remains running.
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48Compared to 32-bit processors, 64-bit processors can address:
A.Only Virtual Memory
B.Less RAM
C.The same amount of RAM
D.Significantly more RAM
Correct Answer: Significantly more RAM
Explanation:
A 32-bit processor can address up to 4GB of RAM, while a 64-bit processor can theoretically address exabytes of RAM.
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49Which component supplies power to the motherboard, optical drives, and hard drives?
A.GPU
B.CPU
C.UPS
D.PSU (Power Supply Unit)
Correct Answer: PSU (Power Supply Unit)
Explanation:
The PSU converts mains AC to low-voltage regulated DC power for the internal components of a computer.
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50What is the purpose of a 'Parity Bit' in RAID 5?
A.To encrypt the data
B.To increase storage speed
C.To compress the data
D.To reconstruct data if a drive fails
Correct Answer: To reconstruct data if a drive fails
Explanation:
Parity data allows the RAID controller to calculate the missing data from a failed drive by comparing the remaining data blocks and the parity block.