Computer Studies

Includes fundamentals of computers, hardware and software, operating systems, MS Office, internet, networking, and basic IT concepts for recruitment exams.

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1
How does RAM affect a computer performance?
Medium 2 Marks
More RAM means the computer can juggle more tasks at once.
A It determines the screen resolution
B It determines how many programs can run simultaneously and affects execution speed
C It controls the speed of the internet connection
D It determines the quality of printed output
2
What is DRAM?
Medium 2 Marks
Dynamic means it needs constant refreshing to keep its data.
A A type of ROM used for permanent storage
B Dynamic RAM that stores each bit in a capacitor and needs constant refreshing
C Static RAM that uses flip-flop circuits
D A type of cache memory inside the CPU
3
What is SRAM and where is it mainly used?
Medium 2 Marks
Static means it holds data without refreshing — making it faster but costlier.
A Slow RAM used as main system memory
B Dynamic RAM that requires constant refreshing
C Static RAM that uses flip-flop circuits and is mainly used in cache memory
D RAM that can only be read not written to
4
What is firmware?
Medium 2 Marks
Think about software that is baked into the hardware itself.
A A type of application software installed by the user
B Software permanently embedded in hardware devices stored in ROM
C A type of antivirus program
D Temporary data stored in RAM during processing
5
What is PROM?
Medium 2 Marks
PROM can be written once — after that it becomes permanent.
A Permanently Readable Output Memory
B Programmable Read Only Memory that can be programmed once after manufacturing
C Erasable ROM that uses ultraviolet light
D ROM that uses electrical signals for erasure
6
How is EPROM erased?
Medium 2 Marks
The E in EPROM stands for Erasable — think about what type of light erases it.
A Using electrical signals
B Using a strong magnetic field
C Using ultraviolet (UV) light
D Using water cooling
7
What is EEPROM?
Medium 2 Marks
The EE in EEPROM stands for Electrically Erasable — no UV light needed.
A ROM that can only be programmed once
B ROM erased using ultraviolet light
C Electrically Erasable Programmable ROM that can be erased and rewritten using electrical signals
D A type of DRAM used for cache memory
8
Which type of ROM is used in most modern computers?
Medium 2 Marks
Which ROM technology is most flexible and convenient for updates?
A PROM
B EPROM
C Basic ROM
D EEPROM or Flash memory
9
What is the main purpose of cache memory?
Medium 2 Marks
Cache saves time by keeping frequently needed data within quick reach.
A To store the operating system permanently
B To act as virtual memory when RAM is full
C To improve CPU performance by storing frequently accessed data closer to the CPU
D To provide long-term backup storage
10
How does cache memory improve CPU performance?
Medium 2 Marks
What happens when the CPU finds data in cache instead of going to RAM?
A By increasing the clock speed of the CPU
B By replacing RAM entirely
C By storing frequently used data close to the CPU so it is retrieved faster than from RAM
D By compressing data to save storage space
11
Which of the following correctly describes cache memory?
Medium 2 Marks
Cache trades size for speed — it is tiny but extremely fast.
A Large in size and slow in speed
B Small in size fast in speed and expensive
C Large in size fast in speed and cheap
D Same speed as RAM but larger
12
What is L1 cache?
Medium 2 Marks
L1 is first in line — smallest fastest and closest to the processor.
A The largest and slowest cache level
B Cache located on the hard disk for faster file access
C The smallest and fastest cache located inside the CPU
D Cache shared between multiple CPU cores
13
What is the correct order of cache levels from fastest to slowest?
Medium 2 Marks
L1 is fastest because it is physically inside the CPU.
A L3 then L2 then L1
B L2 then L1 then L3
C L1 then L2 then L3
D All cache levels have equal speed
14
Why is cache memory more expensive than RAM?
Medium 2 Marks
Speed comes at a price — what makes cache so fast also makes it costly.
A Because it uses optical technology
B Because it is imported from other countries
C Because of its very high speed which requires expensive manufacturing
D Because it has a larger storage capacity
15
What is virtual memory?
Medium 2 Marks
Virtual memory tricks the system into thinking there is more RAM than physically exists.
A A type of RAM installed on the motherboard
B A memory management technique that uses part of secondary storage as if it were RAM
C The fastest type of cache memory
D Another name for ROM
16
How does virtual memory work?
Medium 2 Marks
Think about the OS moving data back and forth between RAM and hard disk.
A It increases the physical size of RAM chips
B When RAM is full the OS transfers some data to a hard disk section called the paging file and retrieves it when needed
C It permanently compresses RAM data to create more space
D It adds extra RAM from the network
17
What is the term for the process of moving data between RAM and the hard disk in virtual memory?
Medium 2 Marks
The name comes from the paging file — what do you call this swapping process?
A Defragmentation
B Formatting
C Paging
D Compiling
18
What is a paging file?
Medium 2 Marks
Where exactly on the hard disk does the OS store temporarily swapped-out RAM data?
A A file that stores antivirus definitions
B A section of the hard disk used as virtual memory by the operating system
C A type of ROM used for booting
D A compressed backup of RAM contents
19
What is a disadvantage of virtual memory?
Medium 2 Marks
What happens to speed when the CPU must access data from a slow hard disk instead of fast RAM?
A It increases the cost of RAM
B It permanently deletes data from the hard disk
C It reduces system speed because hard drives are much slower than RAM
D It prevents multitasking entirely
20
Which secondary storage device has NO mechanical moving parts and is most durable?
Medium 2 Marks
Moving parts can break — which storage device eliminates this problem?
A HDD
B CD-ROM
C SSD
D DVD
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