MCQOPTIONS
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MCQOPTIONS
This section includes 202 Mcqs, each offering curated multiple-choice questions to sharpen your Computer Science knowledge and support exam preparation. Choose a topic below to get started.
| 101. |
semiconductor memory is |
| A. | somewhat slower than magnetic core memory. |
| B. | a volatile memory |
| C. | somewhat longer than magnetic core memory |
| D. | all of these |
| Answer» C. somewhat longer than magnetic core memory | |
| 102. |
A dynamic RAM consists of |
| A. | 6 transistors |
| B. | 2 transistors and 2 capacitors |
| C. | 1 transistors and 2 capacitors |
| D. | 2 capacitors only |
| Answer» D. 2 capacitors only | |
| 103. |
Whic of the following is not true of primary storage? |
| A. | It represents the decimal number through string of binary digits. |
| B. | It stores operating system programs. |
| C. | It storage data while the are being processed by CPU. |
| D. | It Stores the bulk of data used by computer application |
| Answer» E. | |
| 104. |
Choose the Correct statement (s) from the following? |
| A. | PROM contains a programmable AND array and a fixed OR array |
| B. | PLA contains a fixed AND array and a programmable OR array |
| C. | PROM contains a fixed AND array and programmable OR array |
| D. | None of these |
| Answer» D. None of these | |
| 105. |
Memory Consisting of electronic circuits attached into sillicon chip is known as |
| A. | magnetic core memory |
| B. | emiconductor memory |
| C. | thin film memory |
| D. | MOS memory |
| Answer» C. thin film memory | |
| 106. |
Memory refreshing may be done |
| A. | by the CPU that contains a special regress counter, only |
| B. | by an external refresh controller, only |
| C. | either by the CPU or by a external refresh controller |
| D. | none of these |
| Answer» C. either by the CPU or by a external refresh controller | |
| 107. |
The use of hardware in Memory Management is through segment relocation and protection is |
| A. | to perform address translation to reduce size of the memory |
| B. | to perform address translation to reduce execution time overhead |
| C. | both (a) and (b) |
| D. | none of these |
| Answer» D. none of these | |
| 108. |
Fastest type of memory from the following list is |
| A. | tape |
| B. | semiconductor memory |
| C. | disk |
| D. | bubble memory |
| Answer» C. disk | |
| 109. |
What is the main advantage of magnetic core memory over semiconductor RAM memory? |
| A. | more compact and smaller |
| B. | more economical |
| C. | a bit does not have to be written after reading |
| D. | non - volatile |
| Answer» E. | |
| 110. |
Serial access time of magnetic are useful in applications where |
| A. | data consists of numbers |
| B. | short access time is required |
| C. | each stored word is processed differently |
| D. | data naturally needs to flow in and out in serial form |
| Answer» C. each stored word is processed differently | |
| 111. |
The access time of magnetic bubble memory is approximately |
| A. | 30 nano seconds |
| B. | 30 micro seconds |
| C. | 30 milli seconds |
| D. | 0.3 seconds |
| Answer» C. 30 milli seconds | |
| 112. |
EEPROM is |
| A. | electrically erasable |
| B. | easily erasable |
| C. | non - erasable |
| D. | effective erasable |
| Answer» B. easily erasable | |
| 113. |
Disadvantage of dynamic RAM over static RAM is |
| A. | higher power consuption |
| B. | variable speed |
| C. | need to refresh the capacitor charges every once in two milliseconds |
| D. | higher bit density |
| Answer» D. higher bit density | |
| 114. |
In comparison with static RAM memory, the dynamic RAM memory has |
| A. | lower bit density and higher power consumption |
| B. | higher bit density and higher power consumption |
| C. | lower bit density and lower power consumption |
| D. | higher bit density and lower power consumption |
| Answer» B. higher bit density and higher power consumption | |
| 115. |
The refreshing rate of dynamic RAMs is approximately once in |
| A. | two micro seconds |
| B. | two milli seconds |
| C. | fifty milli seconds |
| D. | two seconds |
| Answer» C. fifty milli seconds | |
| 116. |
Which memory is non - violatile and may be written only once? |
| A. | RAM |
| B. | EE-ROM |
| C. | EPROM |
| D. | PROM |
| Answer» E. | |
| 117. |
The memory which is ultaviolet light erasable and electrically programmable is |
| A. | ROM |
| B. | PROM |
| C. | RAM |
| D. | EPROM |
| Answer» E. | |
| 118. |
Which of the following statements is wrong? |
| A. | RAM is a type of volatile |
| B. | Magnetic tape is non-volatile |
| C. | Magnetic core and semiconductor memories are used as mass memory medium |
| D. | An EPROM can be programmed, erased and reprogrammed by the user with an EPROM programming instrument |
| Answer» E. | |
| 119. |
For a memory system, the cycle time is |
| A. | same as the access time |
| B. | longer than the access time |
| C. | shorter than the access time |
| D. | submultiple of the access time |
| Answer» B. longer than the access time | |
| 120. |
The minimum time delay required between initiation of two successive memory operations is called |
| A. | memory cycle time |
| B. | memory access time |
| C. | transmission time |
| D. | skip time |
| Answer» C. transmission time | |
| 121. |
Desirable characteristic (s) of a memory system is (are) |
| A. | speed and reliability |
| B. | low power consumption |
| C. | durability and compactness |
| D. | all of these |
| Answer» E. | |
| 122. |
Which Memory is difficult to interface with processor? |
| A. | Static memory |
| B. | Synamic memory |
| C. | ROM |
| D. | RAM |
| Answer» C. ROM | |
| 123. |
Which of the following is not a form of memory? |
| A. | Instruction Cache |
| B. | Instruction register |
| C. | Instruction opcode |
| D. | Translation lookaside buffer |
| Answer» D. Translation lookaside buffer | |
| 124. |
The sequence of events that happen during a typical fetch operation is |
| A. | PC->MAR->MEMORY->MDR->IR |
| B. | PC->Memory->MDR->IR |
| C. | PC->Memory->IR |
| D. | PC->MAR->Memory->IR |
| Answer» B. PC->Memory->MDR->IR | |
| 125. |
PLA |
| A. | produces sum of products as the output |
| B. | is deducated for a particular operation. |
| C. | is general |
| D. | both (a) and (b) |
| Answer» E. | |
| 126. |
Number of machine cycles required for RET instruction in 8085 microprocessor is |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 5 |
| Answer» D. 5 | |
| 127. |
In 8085 microprocessor, the value of the most significant bit of the result following the execution of any arithmetic or Booean instructiomn is stored in the |
| A. | carry status flag |
| B. | auxiliary carry status flag |
| C. | sign status flag |
| D. | zero status flag |
| Answer» D. zero status flag | |
| 128. |
When a subroutine is called, then address of the instruction following the CAL instruction is stored in/on the. |
| A. | stack pointer |
| B. | Accumulator |
| C. | Program Counter |
| D. | Stack |
| Answer» D. Stack | |
| 129. |
A System of letters, numbers symbols adopted by Computer manufacturer as an abbreviated for of instructiuon sets is called |
| A. | mesh |
| B. | monitor |
| C. | modern |
| D. | mnemonic |
| Answer» E. | |
| 130. |
A device that works in conjuction with a computer but not as part of it is called |
| A. | microprocessor |
| B. | peripheral device |
| C. | hardware |
| D. | memory |
| Answer» C. hardware | |
| 131. |
Microprogramming is a technique for |
| A. | writing small programs effectively |
| B. | programming output/input routines |
| C. | programming the microprocessors |
| D. | programming the control steps of a computer |
| Answer» E. | |
| 132. |
How many adresses are required for 25 x 40 video RAM? |
| A. | 1020 |
| B. | 1920 |
| C. | 1000 |
| D. | 2000 |
| Answer» D. 2000 | |
| 133. |
What is the storage capacity of a Hollerith card which is organized into nibbles? |
| A. | 32 |
| B. | 64 |
| C. | 120 |
| D. | 240 |
| Answer» E. | |
| 134. |
The ability to temporarily halt the CPU and use this time to send information on buses is called |
| A. | direct memory access |
| B. | vectoring the interrupt |
| C. | polling |
| D. | cycle stealing |
| Answer» E. | |
| 135. |
An interrupt can be temporarily ignored by the counter is called |
| A. | vectored interrupt |
| B. | non - maskable interrupt |
| C. | maskable interrupt |
| D. | low priority interrupt |
| Answer» D. low priority interrupt | |
| 136. |
The bus connected between the CPU and main memory that permits transfer of information between main memory and the CPU is called |
| A. | DMA bus |
| B. | memory bus |
| C. | address bus |
| D. | control bus |
| Answer» C. address bus | |
| 137. |
The device which is used to connect a peripheral to bus is called |
| A. | control register |
| B. | interface |
| C. | communication protocol |
| D. | none of these |
| Answer» C. communication protocol | |
| 138. |
The bus which is used to transfer data from main memory to peripheral device is |
| A. | data bus |
| B. | input bus |
| C. | DNA bus |
| D. | output bus |
| Answer» D. output bus | |
| 139. |
Which of the following unit is used to supervise each instructions in the CPU? |
| A. | Control logic unit |
| B. | Accumulator |
| C. | ALU |
| D. | Control register |
| Answer» B. Accumulator | |
| 140. |
Which of the following informatuon holds the information before going to the decoder? |
| A. | control register |
| B. | data register |
| C. | accumulator |
| D. | address register |
| Answer» C. accumulator | |
| 141. |
The register used as a working area in CPU is |
| A. | program counter |
| B. | instruction register |
| C. | instruction decoder |
| D. | accumulator |
| Answer» E. | |
| 142. |
The technique which repeatedly uses the same block of internal storage during diifferent stage of problam is called |
| A. | ocverlay |
| B. | overlapping |
| C. | swapping |
| D. | reuse |
| Answer» B. overlapping | |
| 143. |
The ability of a medium sized computer system to increase in data processing capability by addition of such devices as mass storage devices, I/O devices etc is called |
| A. | computer expandability |
| B. | computer mobility = |
| C. | computer enagancement |
| D. | computer upward capability |
| Answer» B. computer mobility = | |
| 144. |
The unit of a computer system whic executes program, communicates with and often controls the operation of other subsystems of the computer is the |
| A. | CPU |
| B. | control unit |
| C. | flo unit |
| D. | peripheral unit |
| Answer» B. control unit | |
| 145. |
The register which contains the data to be written into or read out of the addressed location is called |
| A. | memory address register |
| B. | memory data register |
| C. | program computer |
| D. | index register |
| Answer» C. program computer | |
| 146. |
The register which holds the address of the location to or from which data are to be transferred is called |
| A. | index register |
| B. | instruction register |
| C. | memory address register |
| D. | memory data register |
| Answer» D. memory data register | |
| 147. |
The register which keeps track of the execution of a program and which contains the memory address of the instructions currently being executed is called |
| A. | index rgister |
| B. | memory address register |
| C. | program counter |
| D. | instruction register |
| Answer» D. instruction register | |
| 148. |
The ALU of a computer nowmally contains a number of high speed storage elements called |
| A. | semi conductor memory |
| B. | registers |
| C. | hard disk |
| D. | magnetic disks |
| Answer» C. hard disk | |
| 149. |
The control unit o Computer |
| A. | performs ALU operations on the data |
| B. | controls the operation of the output devices |
| C. | is a device for manually operating the computer |
| D. | directs the other unit of computers |
| Answer» E. | |
| 150. |
The diffrences between PLA and RON is |
| A. | PLA is combinational ROM is sequential |
| B. | PLA economies on the number of minterms |
| C. | PLA has fixed AND array, ROM has fixed OR array. |
| D. | none of these |
| Answer» C. PLA has fixed AND array, ROM has fixed OR array. | |