Memory MCQ Quiz - Objective Question with Answer for Memory - Download Free PDF

The correct answer is RAM.

Key Points

• RAM (Random Access Memory) is a volatile memory used to temporarily store data while a computer is running.
• It facilitates quick access to data for the processor, enabling smooth execution of programs and tasks.
• The data stored in RAM is cleared when the computer is powered off, making it ideal for temporary storage.
• RAM enhances the performance of a computer by allowing faster read and write operations compared to storage devices like hard disks or SSDs.
• Modern computers typically use DDR (Double Data Rate) RAM, such as DDR4 or DDR5, for improved speed and efficiency.

Additional Information

• Volatile Memory: Volatile memory loses its content when the power is turned off. RAM is an example of volatile memory.
• Non-volatile Memory: Non-volatile memory retains data even when the computer is powered off. Examples include hard drives, SSDs, and ROM.
• Cache Memory: Cache is a smaller, faster type of memory located inside or close to the CPU, used to store frequently accessed data for quicker retrieval.
• Hard Disk: A hard disk is a non-volatile storage device used to store permanent data such as files, applications, and the operating system.
• ROM (Read-Only Memory): ROM is a type of non-volatile memory that contains essential instructions for booting up the computer and cannot be modified easily.

The correct answer is To store frequently accessed data for quick retrieval.

Key Points

• Cache memory is a small-sized, high-speed memory located close to the CPU, designed to store frequently accessed data and instructions.
• It reduces the time required to access data from the main memory (RAM), thereby improving system performance.
• Cache operates at a much faster speed compared to RAM, enabling the CPU to retrieve essential data quickly without delays.
• Modern processors often include multiple levels of cache, such as L1, L2, and L3 cache, each with varying speeds and sizes for optimized performance.
• By minimizing the need for frequent access to slower main memory, cache memory plays a crucial role in enhancing processing efficiency.

Additional Information

• Levels of Cache Memory:
  • L1 Cache: Closest to the CPU, the smallest and fastest type of cache.
  • L2 Cache: Larger and slightly slower than L1, typically located on the CPU chip.
  • L3 Cache: Shared among CPU cores, larger but slower than L1 and L2.
• Cache Hit and Miss:
  • A cache hit occurs when the CPU finds the required data in the cache, resulting in faster access.
  • A cache miss happens when the data is not in the cache, forcing the CPU to retrieve it from main memory.
• Cache Replacement Policies:
  • Techniques like Least Recently Used (LRU), First In First Out (FIFO), and Random Replacement determine which data to replace in cache when it's full.
• Difference Between Cache and RAM:
  • Cache memory is faster but smaller in size compared to RAM.
  • RAM stores larger data temporarily, while cache focuses on frequently accessed data for rapid retrieval.
• Modern Applications:
  • Cache memory is crucial in applications like gaming, video editing, and database management systems for enhancing processing speeds.

The correct answer is To extend RAM capacity by using disk space.

Key Points

• Virtual memory allows a computer system to use disk space to simulate additional RAM, enabling larger applications to run even with limited physical memory.
• It provides the ability to run multiple programs simultaneously by swapping inactive data from RAM to disk storage.
• This mechanism ensures that critical processes have access to memory, improving system performance under heavy workloads.
• Virtual memory is managed by the operating system using a combination of hardware and software mechanisms, such as paging and segmentation.
• It creates an abstraction for users, making the system appear to have more memory than is physically available.

Additional Information

• Paging: A memory management scheme that stores and retrieves data from secondary storage in fixed-size blocks called pages. It is key to implementing virtual memory.
• Thrashing: A condition where excessive paging occurs, leading to a significant drop in system performance due to frequent swapping between RAM and disk.
• Swap Space: A dedicated portion of a storage device used as an extension of RAM for virtual memory operations.
• Segmentation: A memory management technique that divides a program into variable-sized segments, helping manage virtual memory efficiently.
• Benefits of Virtual Memory: Facilitates multitasking, runs larger applications, isolates processes for security, and provides an abstraction layer for developers.

The correct answer is ROM .

Key Points

• The correct ascending order arrangement of different memory devices in terms of their accessing speed is ROM .
  • The cache is faster, cheaper, and smaller than RAM.
  • In Cache memory, the CPU caches data and programs frequently and quickly.
  • RAM holds the current data and applications of the CPU.

Additional Information

• Dynamic Random Access Memory
  • Dynamic random-access memory (DRAM) is the main memory in most current computers.
  • The excellent scalability of DRAM has significantly contributed to the development of modern computers.

The correct answer is Cache memory.

Key Points

• Cache memory: A small and high-speed memory layer integrated with the CPU or located very close to it.
• Stores frequently used data and instructions for direct access by the CPU, enabling access times in the range of a few nanoseconds, significantly faster than any other memory option.

Additional Information

• Virtual memory: An extension of main memory on disk, offering larger capacity but significantly slower access due to physical disk access requirements.
• Secondary memory: Includes storage devices like hard disk drives (HDDs) and solid-state drives (SSDs). Although faster than virtual memory, access times are still in the milliseconds range compared to cache.

The correct answer is PROM.

• PROM is not a part of auxiliary memories in a Computer system.

Key Points

• Secondary Memory/ Auxiliary memory:
  • An Auxiliary memory is the lowest-cost, highest-capacity and slowest-access storage in a computer system. 
  • It is permanent in nature, so it is also called non-volatile.
  • In these memories, programs and data are kept for long-term storage or when not in immediate use.
  • Examples of auxiliary memories are magnetic tapes, Floppy, CD-ROM and magnetic disks.
  • The PROM (Programmable Read-Only Memory) has the option of being programmed.
  • It is not a part of auxiliary memory.

Additional Information

• Primary Memory:
  • It is often referred to as the working memory of the main memory of a computer system.
  • It is temporary in nature, so it is also called volatile memory.
  • Its example is RAM.

The correct answer is Binary.

Key Points

• Data stored in a compute in the form of binary.
• A binary number is a number expressed only two symbols: typically "0" (zero) and "1" (one).
• Each digit is referred to as a bit or binary digit.
• Bit is the smallest unit of memory.
• Bit is the short form of Binary digit.
• Half byte is known as a nibble.

Additional Information

• The memory of a computer is usually measured in bytes.
• Tera-represents the fourth power of 1000.
• A Terabyte is more precisely defined as 1,024 gigabytes.
• 1 TB equals 1,024 gigabytes (GB).
• The storage capacity of a hard disc is measured in Megabytes, Gigabytes, and Terabytes.

The correct answer is Yotta Byte (YB).

Key Points

• Yotta Byte (PB) is considered the largest.
• 1 Yotta Byte (YB) = 1024 Zettabytes

Additional Information

Data Measurement Chart:

The correct answer is Cache Memory.

Key Points

• Cache memory is a special very high-speed memory.
  • It is used to speed up and synchronize with the high-speed CPU. Cache memory is more expensive than main memory or disk memory but economical as compared to CPU registers.
  • Cache memory is an extremely fast memory type that acts as a buffer between the RAM and the CPU.
  • It holds frequently requested data and instructions so that they are immediately available to the CPU when needed.
  • Cache memory is used to reduce the average time to access data from the main memory.

Additional Information

• Secondary Memory:
  • It is non-volatile, i.e. it retains data when the power is turned off.
  • It is cheaper than primary memory.
  • Depending on whether the second memory device is part of the CPU, there are two types of secondary memory – fixed and removable.
  • Hard drives, SSD, Flash, Optical drives, USB drives are some examples of secondary memory in computers.

The correct answer is DRAM.

Key Points

• DRAM:
  • It is dynamic random access memory and is widely used as a computer's main memory. Hence, Option 2 is correct.
  • Each DRAM memory cell is made up of a transistor and a capacitor within an integrated circuit, and a data bit is stored in the capacitor.
• DDR-RAM:
  • It stands for Double Data Rate Synchronous Dynamic Random-Access Memory.
  • These are the computer memory that transfers the data twice as fast as regular chips like SDRAM chips because DDR memory can send and receive signals twice per clock cycle as a comparison.
• SRAM:
  • It stands for Static Random Access Memory.
  • It is a form of a semiconductor.
  • It is widely used in microprocessors, general computing applications, and electronic devices.
  • The SRAM is volatile in nature which means the data stored in it gets all wiped out once the power supply is cut.
  • SRAM is comprised of flip-flops. 
• PRAM:
  • In computer science, a parallel random-access machine is a shared-memory abstract machine.
  • As its name indicates, the PRAM is intended as the parallel-computing analogy to the random-access machine.

The correct answer is Flash Memory.

Key Points

• Digital Camera
  • It is a camera that captures photographs in flash memory.
  • The basis for digital camera image sensors is metal-oxide-semiconductor technology.
  • Steven Sasson invented the world's first digital camera in 1975.
• Flash Memory
  • It is a type of nonvolatile memory that erases data in units called blocks and rewrites data at the byte level.
  • It is widely used for storage and data transfers in consumer devices, industrial applications.
  • Flash memory is a non-volatile computer storage chip,
  • It is made up of EEPROM.
  • EEPROM is the acronym of electrically erasable programmable read-only memory,
  • EEPROM is a Programmable ROM that can be erased and reprogrammed using an electrical charge.
  • It was first was developed by George Perlegos.
  • It allows the user to update the computer BIOS without having to open the computer or remove any chips.
  • It is organized as arrays of floating-gate transistors.
  • USB flash drives, Memory cards are examples of flash memory storage.
  • BIOS is stored in a Flash memory chip.

Additional Information

• Virtual Memory
  • It is a feature of an operating system that enables a computer to be able to compensate for shortages of physical memory by transferring pages to data from random access memory to disk storage.
• Main Memory
  • It refers to physical memory that is internal to the computer.
  • Main Memory includes RAM and primary storage.
  • The computer can manipulate only data that is in the main memory.
• Cache Memory
  • Cache memory is an extremely fast memory type that acts as a buffer between RAM and the CPU.
  • It is used to reduce the average time to access data from the Main memory.

The Correct Answer is ROM.

Key Points

• The permanent memory of a computer is known as ROM(Read-only memory).
• In computers and other electronic devices, read-only memory (ROM) is a form of non-volatile memory.
• After the memory unit is manufactured, data contained in ROM cannot be electronically changed. Read-only memory, also known as firmware, is useful for storing software that is rarely updated during the life of the device.
• Plug-in cartridges containing ROM can be used to distribute software applications (such as video games) for programmable computers.
• Read-only memory refers to memory that is hard-wired and cannot be modified electronically after manufactures, such as a diode matrix or a mask ROM integrated circuit (IC).

Additional Information

• The memory is permanently installed on your computer. This is a read-only memory. The working memory of a computer, also known as random-access memory. The hardware allows data to be passed through a device. 
• Random-access memory (RAM) is a type of computer memory that allows data and machine code to be read and modified in any order. It is commonly used to store working data and machine code.
• A CD-ROM is a data-containing optical compact disc that has been pre-pressed. CD-ROMs are a form of read-only memory that computers can read but not write to or delete.
• The electronic circuitry that executes instructions in a computer programme is known as a central processing unit (CPU), also known as a central processor, main processor, or simply processor.

The correct answer isROM.

Key Points

• ROM(Read-only Memory) is permanent memory in the computer system.
• The computer system cannot write any data on ROM.

Important Points

• Random-access memory is a form of computer data storage that stores data and machine code currently being used.
• The computer CPU (short for Central Processing Unit) is a vital component that handles all the instructions and calculations that are sent to it from other computer's components and peripherals.
• CD-ROM Stands for "Compact Disc Read-Only Memory."
• A CD-ROM is a CD that can be read by a computer with an optical drive."

The correct answer is SRAM.

​Key Points

• SRAM memory devices are very much similar, mainly in terms of speed, to the cache memory.
• SRAM stands for Static random-access memory.
• Static random-access memory is a type of random-access memory that uses latching circuitry to store each bit.
• SRAM is volatile memory; data is lost when power is removed.
• The term static differentiates SRAM from DRAM which must be periodically refreshed.

Additional Information

• Dynamic random access memory (DRAM) is a type of semiconductor memory that is typically used for the data or program code needed by a computer processor to function.
• Flash memory, also known as flash storage, is a type of nonvolatile memory that erases data in units called blocks and rewrites data at the byte level.
• EEPROM (electrically erasable programmable read-only memory) is user-modifiable read-only memory (ROM) that can be erased and reprogrammed (written to) repeatedly through the application of higher than normal electrical voltage.

The correct answer is Terabyte.

Important Points

• The memory unit is the amount of data that can be stored in the storage unit.
• This storage capacity is expressed in terms of Bytes.
  • Bit (Binary Digit): A binary digit is logical 0 and 1 representing a passive or an active state of a component in an electric circuit.
  • Nibble: A group of 4 bits is called a nibble.
  • Byte: A group of 8 bits is called byte. A byte is the smallest unit, which can represent a data item or a character.
  • Word: A computer word, like a byte, is a group of a fixed number of bits processed as a unit, which varies from computer to computer but is fixed for each computer.

Additional Information

Memory units with no. of Bytes: