Basic Computer: RAM & ROM MCQ — 15 Practice Questions with Answers

Explanation

RAM stands for Random Access Memory. It is part of primary memory and is used by the CPU to hold the data, instructions and programmes that are currently being worked on. The key cue in the question is “RAM in a computer system”. RAM is volatile, so its contents are lost when the power supply is switched off. It is fast and directly useful during processing, but it is not meant for permanent file storage. Therefore, option A correctly describes RAM.

Explanation

RAM is volatile read-write working memory, so I matches 4. ROM is normally used for permanent instructions, so II matches 2. DRAM is a common form of main memory and it needs periodic refreshing, so III matches 1. SRAM is faster and is often used in cache memory, so IV matches 3. The correct sequence is therefore I-4, II-2, III-1 and IV-3. This matching also separates the broad RAM-ROM difference from the two common RAM types.

Explanation

The start-up cue in the stem points to boot instructions. A computer needs a small set of permanent instructions to begin checking hardware and loading the operating system. These instructions are kept in ROM or firmware because ROM is non-volatile. RAM cannot serve this role because it becomes empty when power is lost. Cache and virtual memory are also temporary working arrangements used after processing begins. Hence, the correct answer is ROM.

Explanation

The matching depends on the basic meanings of the memory names. PROM is Programmable ROM and is commonly described as programmable once after manufacture. EPROM can be erased with ultraviolet light, while EEPROM can be erased and reprogrammed electrically. RAM is not a ROM type; it is volatile read-write working memory used while programmes run. Therefore the correct sequence is 1-7, 2-6, 3-5 and 4-8.

Explanation

The question asks for the feature that is not usual for RAM. RAM is temporary working memory, supports read-write operations, and is faster than secondary storage for active processing. Permanent storage of the basic start-up firmware is associated with ROM or firmware storage, not RAM. The word permanently is the main cue here. RAM normally loses unsaved contents when power is removed, so it is not the place for permanent start-up instructions.