Computer Knowledge

Computer Memory and Storage

2,477 Questions

Computer memory and storage questions test foundational knowledge of hardware, cache mapping, and data transfer mechanisms. Key areas include Direct Memory Access, analog recording, and RAID levels. This section is essential for candidates preparing for banking and government computer proficiency tests.

Cache memory mappingDirect memory accessRAID storage levelsHard disk technologyOptical media storageMemory addresses

Computer Memory and Storage Questions

Multiple choice

Which of the following is true about bubble memory?

  1. Non-volatile

  2. Volatile

  3. Temporary

  4. RAM

  5. None of these
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Bubble memory is a type of non-volatile computer memory that uses a thin film of a magnetic material to hold small magnetized areas, known as bubbles or domains, each storing one bit of data.

Multiple choice

Which of the following memory structures contains the information used by the server process to validate the user privileges?

  1. Buffer cache

  2. Library cache

  3. Data dictionary cache

  4. Redo log buffer cache
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The Data Dictionary Cache stores information about database objects, users, privileges, and other metadata. When a server process needs to validate user privileges, it checks the data dictionary cache to see what permissions that user has. The Buffer cache stores data blocks. The Library cache stores parsed SQL statements and execution plans. The Redo log buffer stores changes before writing to redo log files - none of these contain privilege information.

Multiple choice

___________ is an area on disk which comprises of one or more disk files.

  1. A package

  2. A table space

  3. A partition

  4. Heap
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

A tablespace is a logical storage container in Oracle databases that consists of one or more physical data files on disk. It provides a layer of abstraction between database objects (tables, indexes) and physical storage, allowing administrators to manage disk space efficiently. Tables, indexes, and other schema objects are stored within tablespaces.

Multiple choice

What is a diskette?

  1. A low cost, thin flexible magnetic storage device

  2. Floppy disk

  3. Primary storage device

  4. High volume storage device

  5. Both 1 and 2
Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

Correct choice

Multiple choice

How many copies of a JSP page can be in memory at a time?

  1. One

  2. Two

  3. Three

  4. Unlimited
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Tomcat maintains only a single instance of each JSP page in memory at any given time. This single instance is then used to serve multiple requests concurrently through different threads, ensuring memory efficiency while handling simultaneous users.

Multiple choice

How many copies of a JSP page can be in memory at a time?

  1. One

  2. Two

  3. Three

  4. Unlimited
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The JSP specification maintains a single instance of each JSP page in memory, with multiple threads handling concurrent requests. This design is memory-efficient and thread-safe. Options B and C are incorrect because the specification doesn't mandate multiple copies, and D is wrong because the instance is shared, not unlimited.

Multiple choice

Which of the following statements is/are true?

  1. RAM is a volatile memory.

  2. ROM is non-volatile.

  3. Cache memory acts as a buffer between the CPU and the main memory.

  4. Only (2) and (3).

  5. (1), (2) and (3) all are true.
Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

Yes, all the three are true.