Memory Management (Primary, Secondary, Virtual, Cache) : MCQs & PYQs with Explanation

Option B

Option A

The full form of SDRAM is Synchronous Dynamic Random Access Memory. SDRAM is a type of dynamic RAM that is synchronized with the system clock, meaning it waits for the clock signal to perform read or write operations. This synchronization improves speed and efficiency compared to conventional DRAM.
Additionally, SDRAM can pipeline commands, allowing multiple instructions to be processed simultaneously.

Option A

Option C

Primary storage or main memory, such as RAM and ROM is directly accessed by the CPU, so it operates at a very high speed. Because it is built using faster and more costly hardware technology, it is also more expensive per unit of storage.
Secondary memory like hard disk, SSD, pen drive is slower because data must be transferred to primary memory before processing, but it is cheaper and used for long-term storage.

Option B

EEPROM stands for Electrically Erasable Programmable Read-Only Memory. It is a special type of memory used in computers and electronics to store data that remains even when the power is turned off. What makes EEPROM useful is that it can be erased and rewritten using electrical signals without needing to remove the chip from the device.

This is faster and easier than older memory types that needed to be erased with ultraviolet (UV) light. EEPROM is commonly used to save important settings and small amounts of data that need to be updated regularly.

Option D

Backup time depends mainly on the data access method and data transfer speed of the storage device. Devices like magnetic disks, pen drives, and CDs allow direct or random access, so data can be read or written faster.
A Magnetic Tape uses sequential access, which means the tape has to move step by step to reach the required data. So, locating and writing data takes more time, making magnetic tape the slowest device for taking data backups.

Option C

EEPROM stands for Electrically Erasable Programmable Read Only Memory. It is a type of non-volatile memory. The contents of EEPROM can be erased and reprogrammed using electrical signals, without removing the chip from the computer system.

Option D

Cache memory is a small, high-speed storage area located between the CPU and the main memory (RAM). Its primary function is to store copies of frequently accessed data and instructions, enabling the CPU to retrieve them more quickly than if it had to access the slower main memory every time.

1.    L1 Cache (Level 1)

• Located inside the CPU.
• Very fast but small in size (usually 16 KB – 128 KB).
• Stores instructions and data frequently used by the CPU.

2.    L2 Cache (Level 2)

• Located on the CPU chip or close to it.
• Larger than L1 (usually 128 KB – 8 MB).
• Acts as a secondary buffer between CPU and RAM.

3.    L3 Cache (Level 3)

• Shared among all CPU cores.
• Larger but slightly slower than L2.
• Enhances multi-core processor performance by sharing data across cores.

UVEPROM (Erasable Programmable Read-Only Memory), used for storing firmware. It can be erased with UV light and reprogrammed multiple times.

Flash Memory, it is non-volatile storage used in USB drives, SSDs, and memory cards. It retains data without power and allows fast read and write operations.

DVD (Digital Versatile Disc), optical storage media for large data, very slow compared to CPU. It is commonly used for movies, software distribution, and backup purposes.

Option B

A bootstrap loader is a small program that starts the process of loading the operating system (OS) when a computer is powered on. It is stored in ROM (Read-Only Memory) because ROM is non-volatile, meaning its contents are retained even when the computer is turned off.

Option C

Virtual Memory is a technique where part of secondary storage (HDD/SSD) is used by the computer as if it were an extension of the main memory (RAM).

• Run larger programs than the available physical RAM.
• Increase multitasking efficiency by swapping data between RAM and disk storage.

The Operating System (OS) manages this process using paging or segmentation, ensuring smooth performance even when physical memory is limited.

Option D

RAM stands for Random Access Memory, which is a type of primary memory in a computer.

• RAM is Volatile, which means it loses its data when the power is turned off.
• RAM temporarily stores data and programs currently in use so the CPU can access them quickly.
• Called “Random Access” because CPU can access any memory location directly without reading sequentially.
• There are two types of RAM: DRAM (Dynamic RAM), which needs refreshing frequently to retain data, and SRAM (Static RAM), which does not need refreshing and is faster but more expensive.

Option B

In this section, you will find detailed explanations for similar types of questions. Thank you.

Option D

Computer memory is broadly classified into volatile (loses data when power is turned off) and non-volatile (retains data even after power is turned off) memory. ROM is a type of non-volatile memory, while Static RAM, Dynamic RAM, and Cache Memory are all volatile.

Option B

Storage devices are used to store data and information in a computer. An optical storage device is a storage medium from which data is read and to which it is written by using a laser.

Option C

A Pen Drive (USB Flash Drive) is a Solid-State storage device that uses flash memory to store data. It connects to a computer via a USB Port and is commonly used for data transfer, storage, and backup.