What is the smallest unit of data storage in a computer? MCQ with Answer and Explanation

Question
What is the smallest unit of data storage in a computer?
A. Nibble
B. Kilobyte
C. Byte
D. Bit
Answer: Option D
Solution (By JKSSB Mock Tests)
A bit is the smallest unit of data in computing and can have a value of 0 or 1. A byte is 8 bits, a kilobyte is 1024 bytes, and a nibble is 4 bits.
This question belongs to: Computer Memory and Storage Devices
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Practice More Memory and Storage Devices Questions

Question #1
What is the function of a memory slot on a motherboard?
A. To connect the RAM module
B. To provide power to the system
C. To attach the hard disk
D. To hold the CPU
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Correct Answer: Option A

Explanation:
Memory slots (DIMM slots) are used to install RAM modules onto the motherboard, providing the connection between RAM and the memory bus.
This question belongs to: Computer Memory and Storage Devices
Question #2
What is the purpose of a memory bus width?
A. It determines the number of bits transferred simultaneously
B. It determines the power consumption
C. It determines the memory capacity
D. It determines the clock speed
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Correct Answer: Option A

Explanation:
The bus width (e.g., 64-bit) is the number of bits that can be transferred at once between CPU and memory, affecting bandwidth.
This question belongs to: Computer Memory and Storage Devices
Question #3
Which of the following is a type of memory that is used for storing the system's configuration data?
A. ROM
B. DRAM
C. SRAM
D. CMOS
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Correct Answer: Option D

Explanation:
CMOS memory stores system configuration parameters like date, time, and hardware settings. It is powered by a small battery.
This question belongs to: Computer Memory and Storage Devices
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