Digital Principles And System Design Set 11

Computer Science Engineering (CSE)

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This set of Digital Principles and System Design Multiple Choice Questions & Answers (MCQs) focuses on Digital Principles And System Design Set 11

Q1 | What are the typical values of tOE?
  • 10 to 20 ns for bipolar
  • 25 to 100 ns for nmos
  • 12 to 50 ns for cmos
  • all of the mentioned
Answer: all of the mentioned
Explaination:
the access time is the time taken to read a stored word after applying the address bits in a mos eprom. it is the time required to fetch data from the memory. the typical values of toe (i.e. access time) are 10 to 20 ns for bipolar, 25 to 100 ns for nmos and 12 to 50 ns for cmos.
Q2 | Which of the following is not a type of memory?
  • ram
  • fprom
  • eeprom
  • rom
Answer: eeprom
Explaination:
eeprom (electrical erasable programmable rom) is not a type of memory because it is used for erasing purpose only. through eeprom, data can be erased electrically, thereby consuming less time.
Q3 | The chip by which both the operation of read and write is performed                      
  • ram
  • rom
  • prom
  • eprom
Answer: ram
Explaination:
a random access memory (ram) is a volatile chip memory in which both the read and write operations can be performed. since it is volatile, therefore it stores data as long as power is on.
Q4 | RAM is also known as                      
  • rwm
  • mbr
  • mar
  • rom
Answer: rwm
Explaination:
a random access memory (ram) is a volatile chip memory in which both the read and write operations can be performed. since it is volatile, therefore it stores data as long as power is on. ram is also known as rwm (i.e. read write memory).
Q5 | If a RAM chip has n address input lines then it can access memory locations upto                      
  • 2(n-1)
  • 2(n+1)
  • 2n
  • 22n
Answer: 2n
Explaination:
ram is a volatile memory, therefore it stores data as long as power is on. ram is also known as rwm (i.e. read write memory). if a ram chip has n address input lines then it can access memory locations upto 2n.
Q6 | The n-bit address is placed in the                      
  • mbr
  • mar
  • ram
  • rom
Answer: mar
Explaination:
the n-bit address is placed in the memory address register (mar) to select one of 2n memory locations. it stores the address of the instruction which is to be executed next.
Q7 | Which of the following control signals are selected for read and write operations in a RAM?
  • data buffer
  • chip select
  • read and write
  • memory
Answer: read and write
Explaination:
read and write are control signals that are used to enable memory for read and write operations respectively.
Q8 | Computers invariably use RAM for                      
  • high complexity
  • high resolution
  • high speed main memory
  • high flexibility
Answer: high speed main memory
Explaination:
ram is a volatile memory, therefore it stores data as long as power is on. ram is also known
Q9 | How many types of RAMs are?
  • 2
  • 3
  • 4
  • 5
Answer: 2
Explaination:
there are two types of ram and these are static and dynamic. static ram(sram) is faster than dynamic ram(dram) as the access time for dram is more compared to that of sram.
Q10 | Static RAM employs                      
  • bjt or mosfet
  • fet or jfet
  • capacitor or bjt
  • bjt or mos
Answer: bjt or mos
Explaination:
static ram employs bipolar or mos flip-flops because both the semiconductor has storing capacity. thus, it’s access time is less and it is faster in operation.
Q11 | Dynamic RAM employs                      
  • capacitor or mosfet
  • fet or jfet
  • capacitor or bjt
  • bjt or mos
Answer: capacitor or mosfet
Explaination:
dynamic ram employs a capacitor or mosfet. thus, it’s access time is more and it is slower in operation.
Q12 | Which one of the following is volatile in nature?
  • rom
  • erom
  • prom
  • ram
Answer: ram
Explaination:
ram is a volatile memory, therefore it stores data as long as power is on. ram is also known as rwm (i.e. read write memory). rams are volatile because the stored data will be lost once the d.c. power applied to the flip-flops is removed.
Q13 | The magnetic core memories have been replaced by semiconductor RAMs, why?
  • semiconductor rams are highly flexible
  • semiconductor rams have highest storing capacity
  • semiconductor rams are smaller in size
  • all of the mentioned
Answer: all of the mentioned
Explaination:
ram is a volatile memory, therefore it stores data as long as power is on. ram is also known as rwm (i.e. read write memory). the magnetic core memories have been replaced by semiconductor rams because of smaller in size, high storing capacity as well as flexibility.
Q14 | The data written in flip-flop remains stored as long as                      
  • d.c. power is supplied
  • d.c. power is removed
  • a.c. power is supplied
  • a.c. power is removed
Answer: d.c. power is supplied
Explaination:
since flip-flops are made up of semiconductor materials. so, it can’t accept a.c. source and the data written in flip-flop remains stored as long as the dc power is maintained.
Q15 | Memory is a/an                        
  • device to collect data from other computer
  • block of data to keep data separately
  • indispensable part of computer
  • device to connect through all over the world
Answer: indispensable part of computer
Explaination:
memory is an indispensable unit of a computer and microprocessor based systems which stores permanent or temporary data.
Q16 | The instruction used in a program for executing them is stored in the                      
  • cpu
  • control unit
  • memory
  • microprocessor
Answer: memory
Explaination:
all of the program and the instructions are stored in the memory. the processor fetches it as and when required.
Q17 | A register is able to hold                      
  • data
  • word
  • nibble
  • both data and word
Answer: word
Explaination:
register is also a part of memory inside a computer. it stands there to hold a word. a word is a group of 16-bits or 2-bytes.
Q18 | A register file holds                      
  • a large number of word of information
  • a small number of word of information
  • a large number of programs
  • a modest number of words of information
Answer: a modest number of words of information
Explaination:
a register file is different from a simple register because of capability to hold a modest number of words of information. a word is a group of 16-bits or 2-bytes.
Q19 | The very first computer memory consisted of
  • a small display
  • a large memory storage equipment
  • an automatic keyboard input
  • an automatic mouse input
Answer: a large memory storage equipment
Explaination:
the very first computer memory consisted of a minute magnetic toroid, which required large, bulky circuit boards stored in large cabinates.
Q20 | A minute magnetic toroid is also called as
  • large memory
  • small memory
  • core memory
  • both small and large memory
Answer: core memory
Explaination:
a minute magnetic toroid is also called as core memory which is made up of a semiconductor. a semiconductor is a device whose electrical
Q21 | Which one of the following has capability to store data in extremely high densities?
  • register
  • capacitor
  • semiconductor
  • flip-flop
Answer: semiconductor
Explaination:
semiconductor has capability to store data in extremely high densities.
Q22 | A large memory is compressed into a small one by using                      
  • lsi semiconductor
  • vlsi semiconductor
  • cdr semiconductor
  • ssi semiconductor
Answer: vlsi semiconductor
Explaination:
vlsi (very large scale integration) semiconductor is used in modern computers to short the size of memory.
Q23 | VLSI chip utilizes                      
  • nmos
  • cmos
  • bjt
  • all of the mentioned
Answer: all of the mentioned
Explaination:
vlsi (very large scale integration) is a memory chip which is made up of nmos, cmos, bjt, and bicmos. it can include 10,000 to 100,000 gates per ic.
Q24 | CD-ROM refers to                      
  • floppy disk
  • compact disk-read only memory
  • compressed disk-read only memory
  • compressed disk- random access memory
Answer: compact disk-read only memory
Explaination:
cd-rom refers to compact disk-read only memory.
Q25 | Data stored in an electronic memory cell can be accessed at random and on demand using                      
  • memory addressing
  • direct addressing
  • indirect addressing
  • control unit
Answer: direct addressing
Explaination:
direct addressing eliminates the need to process a large stream of irrelevant data in order to the desired data word.
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