Description : The sum of the seek time, and the rotational delay is called the ……………….. A) reached time B) access time C) arrived time D) common time
Last Answer : B) access time
Description : Which of the following is/are hard disk performance parameter? A. Seek time B. Latency period C. Access time D. All of the above
Last Answer : D. All of the above
Description : Which of the following statements is not true about disk-arm scheduling algorithms ? (A) SSTF (shortest seek time first) algorithm increases performance of FCFS. (B) The number of requests for disk ... arm movements. (D) SCAN and C-SCAN algorithms are less likely to have a starvation problem.
Last Answer : (B) The number of requests for disk service are not influenced by file allocation method.
Description : Consider a disk with 16384 bytes per track having a rotation time of 16 msec and average seek time of 40 msec. What is the time in msec to read a block of 1024 bytes from this disk? (A) 57 msec (B) 49 msec (C) 48 msec (D) 17 msec
Last Answer : Answer: B
Description : Access time is A) seek time + latency time B) seek time C) seek time D) latency time
Last Answer : Answer : A
Description : Access time is A) seek time + latency time B) seek time C) seek time ? latency time D) latency time
Description : Access time is a. seek time + latency time b. seek time c. seek time – latency time d. latency time
Last Answer : seek time + latency time
Last Answer : a. seek time + latency time
Description : The disk drive component used to position read/write heads over a specific track I known as a. Acoustic couples b. Access arm c. Cluster d. All of the above
Last Answer : Access arm
Last Answer : b. Access arm
Description : Time taken to move from one cylinder of a HDD to another is called 1) Transfer Rate 2) Average seek time 3) Latency 4) Roundtrip time
Last Answer : 2) Average seek time
Description : Time taken to move from one cylinder of a HDD to another is called 1 Transfer Rate 2 Average seek time 3 Latency 4 Roundtrip time
Last Answer : 2 Average seek time
Description : If the Disk head is located initially at track 32, find the number of disk moves required with FCFS scheduling criteria if the disk queue of I/O blocks requests are: 98, 37, 14, 124, 65, 67 (A) 320 (B) 322 (C) 321 (D) 319
Last Answer : (C) 321
Description : Consider a disk queue with request for input/output to block on cylinders 98, 183, 37, 122, 14, 124, 65, 67 in that order. Assume that disk head is initially positioned at cylinder 53 and moving ... and 252 cylinders (B) 640 and 236 cylinders (C) 235 and 640 cylinders (D) 235 and 252 cylinders
Last Answer : Answer: 236 and 208 cylinders Explanation: SSTF Initial head position =53 The closest queue to initial head position=65 head moves from 53 to 65=12 head moves from 65 to 67=2 head moves from 67 ... 122=24 head moves from 122 to 124=2 head moves from 124 to 183=59 Total head movement=208
Description : A disk drive has 100 cylinders, numbered 0 to 99. Disk requests come to the disk driver for cyclinders 12, 26, 24, 4, 42, 8 and 50 in that order. The driver is currently serving a request at cyclinder 24. A seek takes ... (SSTF) algorithm? (A) 0.984 sec (B) 0.396 sec (C) 0.738 sec (D) 0.42 sec
Last Answer : C
Description : ............. policy selects the disk I/O request that requires the least movement of the disk arm from its current position. A) FSCAN B) SSTF C) SCAN D) C-SCAN
Last Answer : B) SSTF
Description : Magnetic disk a medium known as 1) Serial access 2) Direct access 3) Sequential access 4) Sequential and rotational access
Last Answer : 2) Direct access
Description : In the actuator arm assembly of a hard disk drive transport, what device can position the magnetic heads to the correct track of a hard disk more accurately than a dc stepper motor?
Last Answer : Voice coil servo.
Description : The average time required to reach a storage location in memory and obtain its contents is called_____. A. Latency time. B. Access time. C. Turnaround time. D. Response time.
Last Answer : B. Access time.
Description : In Bluetooth, the_____ link is used when avoiding latency (delay in data delivery) is more important than integrity (error-free delivery). A) SCO B) ACL C) ACO D) SCL
Last Answer : SCO
Description : Pipelining improves performance by: (A) decreasing instruction latency (B) eliminating data hazards (C) exploiting instruction level parallelism (D) decreasing the cache miss rate
Last Answer : (C) exploiting instruction level parallelism
Description : The number of disk pages access in B-tree search, where h is height, n is the number of keys, and t is the minimum degree, is: (A) θ(logn h*t) (B) θ(logt n*h) (C) θ(logh n) (D) θ(logt n)
Last Answer : Answer: D
Description : Latency time is A) Time to spin the needed data under head B) Time to spin the needed data under track C) Time to spin data under sector D) All of above
Description : Latency time is a. Time to spin the needed data under head b. Time to spin the needed data under track c. Time to spin data under sector d. All of above
Last Answer : Time to spin the needed data under head
Description : Latency time is a. Time to spin the needed data under head b. Time to spin the needed data under track c. Time to spin data under sector
Last Answer : a. Time to spin the needed data under head
Description : Before a disk drive can access any sector record, a computer program has to provide the record’s disk address. What information does this address specify? A) Track number B) Sector number C) Surface number D) All of above
Last Answer : Answer : D
Description : Before a disk drive can access any sector record, a computer program has to provide the record’s disk address. What information does this address specify? a. Track number b. Sector number c. Surface number d. All of above
Last Answer : Track number
Last Answer : d. All of above
Description : Which type of motion is possible in jointed arm robots a.3 linear and 1 rotational motion b.3 rotational motion c.3 linear motion d.2 linear and 1 rotational motion
Last Answer : b.3 rotational motion
Description : Which of the following terms refers to the rotational motion of a robot arm? a) swivel b) axle c) retrograde d) roll
Last Answer : d) roll
Description : Which of the following terms refers to the rotational motion of a robot arm A : Swivel B : Axle C : Retrograde D : Roll
Last Answer : D : Roll
Description : Which type of motion is possible in jointed arm robots? (A) 3 linear and 1 rotational motion (B) 3 rotational motion (C) 3 linear motion (D) 2 linear and 1 rotational motion
Last Answer : B
Description : Assuming that the disk head is located initially at 32, find the number of disk moves required with FCFS if the disk queue of I/O block requests are 98, 37, 14, 124, 65, 67: (A) 310 (B) 324 (C) 320 (D) 321
Last Answer : (D) 321
Description : How much space will be required to store the bit map of a 1.3 GB disk with 512 bytes block size ? (A) 332.8 KB (B) 83.6 KB (C) 266.2 KB (D) 256.6 KB
Last Answer : (A) 332.8 KB
Description : When we move from the outermost track to the innermost track in a magnetic disk, then density (bits per linear inch) (1) decreases (2) increases (3) remains the same (4) either remains constant or decreases
Last Answer : increases
Description : Which statement is true about a cloud computing environment? A. It cannot be used to host location based applications. B. It enables users to access systems regardless of their location. C. It introduces ... D. It can improve a web server response time by having servers closer to the end user.
Last Answer : It enables users to access systems regardless of their location.
Description : Serial access memories are useful in applications where (A) Data consists of numbers (B) Short access time is required. (C) Each stored word is processed differently. (D) None of these
Last Answer : (D) None of these Explanation: data naturally needs to flow in and out in serial form.
Description : A client-server system uses a satellite network, with the satellite at a height of 40,000 kms. What is the best-case delay in response to a request? (Note that the speed of light in air is 3,00,000 km/second). (A) 133.33 m sec (B) 266.67 m sec (C) 400.00 m sec (D) 533.33 m sec
Last Answer : (D) 533.33 m sec Explanation: The request has to go up and down, and the response has to go up and down. The total path length traversed is thus 160.000 km. The speed of light in air and vacuum is 300,000 km/sec, so the propagation delay alone is 160,000/300,000 sec or about 533 msec.
Description : A Multicomputer with 256 CPUs is organized as 16x16 grid. What is the worst case delay (in hops) that a message might have to take? (A) 16 (B) 15 (C) 32 (D) 30
Last Answer : (D) 30
Description : Station A uses 32 byte packets to transmit messages to station B using sliding window protocol. The round trip delay between A and B is 40 milli seconds and the bottleneck bandwidth on the path between A and B is 64 kbps. The optimal window size of A is (1) 20 (2) 10 (3) 30 (4) 40
Last Answer : (2) 10
Description : ECL is the fastest of all logic families. High Speed in ECL is possible because transistors are used in difference amplifier configuration, in which they are never driven into ............... (1) Race condition (2) Saturation (3) Delay (4) High impedance
Last Answer : Answer: 2 Explanation: Emitter-coupled logic (ECL) is the fastest of all logic families and therefore is used in applications where very high speed is essential. High speeds have become ... configuration, in which they are never driven into saturation and thereby the storage time is eliminated.
Description : The friend functions are used in situations where A) We want to exchange data between classes B) We want to have access to unrelated classes C) Dynamic binding is required D) We want to create versatile overloaded operators.
Last Answer : A) We want to exchange data between classes
Description : Seek time is A) time to position the head over proper track B) time to position the head over proper sector C) time to position the head over proper cylinder D) none of above
Description : Seek time is a. time to position the head over proper track b. time to position the head over proper sector c. time to position the head over proper cylinder d. none of above
Last Answer : time to position the head over proper track
Last Answer : a. time to position the head over proper track
Description : Which of the following is not typically a benefit of dynamic linking? I. Reduction in overall program execution time. II. Reduction in overall space consumption in memory. III. Reduction in overall space consumption on disk. IV. ... updates. (A) I and IV (B) I only (C) II and III (D) IV only
Last Answer : (B) I only
Description : If the queue is implemented with a linked list, keeping track of a front pointer and a rear pointer, which of these pointers will change during an insertion into a non-empty queue? (A) Neither of ... (B) Only front pointer changes (C) Only rear pointer changes (D) Both of the pointers changes
Last Answer : (C) Only rear pointer changes
Description : Which one from the following is highly associated activity of project planning? (A) Keep track of the project progress. (B) Compare actual and planned progress and costs (C) Identify the activities, milestones and deliverables produced by a project (D) Both (B) and (C)
Last Answer : (C) Identify the activities, milestones and deliverables produced by a project