121. Memories are normally classified according to their...
Correct! Memory hierarchy is classified by access time (speed) and cost per bit. Faster memory (like Cache) is more expensive, while slower memory (like HDD) is cheaper.
122. SCSI system is the abbreviation of the...
Correct! SCSI stands for Small Computer System Interface, a standard for connecting peripheral devices to computers.
123. One megabyte memory storage in the form of bytes is equal to...
Correct! 1 MB = 1024 KB, and 1 KB = 1024 Bytes. Therefore, 1 MB = 1024 × 1024 bytes (1024²).
124. Multi-processing systems of the computer system are of...
Correct! The two main types are Symmetric Multiprocessing (SMP) and Asymmetric Multiprocessing.
125. Clustered computer systems are normally linked via...
Correct! Cluster nodes are typically connected via a high-speed Local Area Network (LAN).
126. Kernel mode of operating system runs when the mode bit is...
Correct! By convention in most hardware architectures, Mode Bit 0 indicates Kernel Mode (privileged), and Mode Bit 1 indicates User Mode.
127. Kernel mode of the operating system is also called...
Correct! It is often called Supervisor Mode, System Mode, or Privileged Mode. "Supervisor mode" is the most standard alternative name.
128. Multi processor systems of the computer system has advantage of...
Correct! Reliability is a key advantage. If one processor fails, the system can continue to run (graceful degradation), unlike a single-processor system.
129. Time sharing systems of the computer system have...
Correct! Time-sharing systems require an online file system so that users can access their data and programs immediately when their time slice is active.
130. One megabyte memory storage in the form of bytes is equal to...
Correct! 1 Megabyte (MB) = 1024 Kilobytes (KB). (Note: This question is similar to Q123 but asks for the value in KB rather than total bytes).
131. One that is not a type of multiprocessor of the computer system is...
Correct! A "Single core" processor has only one CPU, so by definition, it cannot be a "multiprocessor" system.
132. Beowulf clusters of the computer system are linked through...
Correct! Beowulf clusters are a specific type of high-performance cluster constructed from commodity hardware linked by a private LAN.
133. One that is not a peripheral device of the computer system is...
Correct! A Register is an internal part of the CPU (processor), whereas keyboards, mice, and printers are external peripheral devices.
134. Instructions that are requested by the system are first...
[Image of Fetch Decode Execute Cycle]
Correct! The instruction cycle always begins with the Fetch stage, where the instruction is retrieved from memory.
135. Each node in clustered system of the computer system monitors...
Correct! In a high-availability cluster, nodes monitor one or more other nodes (via a "heartbeat") to detect failures and take over if necessary.
136. A bit that selects the mode of the operating system is called...
Correct! The Mode Bit is the specific hardware flag that distinguishes between User Mode and Kernel Mode execution.
137. Process synchronization of programs is done by...
Correct! The Operating System provides mechanisms (like semaphores, monitors, and mutexes) to handle process synchronization.
138. After fetching an instruction, the computer performs...
Correct! The cycle is: Fetch -> Decode -> Execute. After fetching, the control unit must decode the instruction to understand what to do.
139. More devices can be connected to computer system through...
Correct! Device Controllers (like USB controllers) allow multiple physical devices to be connected and managed by the system.
140. System resources of computer system can be utilized better in...
Correct! In a multiprogramming environment, when one job waits for I/O, the CPU can switch to another job, maximizing resource utilization.
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