A unix file system has 1-KB blocks and 4-byte disk addresses. What is the maximum file size if i-nodes contain 10 direct entries and one single, double and triple indirect entry each? (A) 32 GB (B) 64 GB (C) 16 GB (D) 1 GB

A unix file system has 1-KB blocks and 4-byte disk addresses. What is the maximum file size if i-nodes contain 10 direct entries and one single, double and triple indirect entry each? (A) 32 GB (B) 64 GB (C) 16 GB (D) 1 GB
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(C) 16 GB
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A UNIX file system has 1 KB block size and 4-byte disk addresses. What is the maximum file size if the inode contains ten direct block entries, one single indirect block entry, one double indirect block entry and one triple indirect block entry? (A) 30 GB (B) 64 GB (C) 16 GB (D) 1 GB

Description : A UNIX file system has 1 KB block size and 4-byte disk addresses. What is the maximum file size if the inode contains ten direct block entries, one single indirect block entry, one double indirect block entry and one triple indirect block entry? (A) 30 GB (B) 64 GB (C) 16 GB (D) 1 GB

Last Answer : (C) 16 GB

Which of the following information about the UNIX file system is not correct? (A) Super block contains the number of i-nodes, the number of disk blocks, and the start of the list of free disk blocks. (B) An i-node contains accounting information as well as enough information to locate all the disk blocks that holds the file’s data. (C) Each i-node is 256-bytes long. (D) All the files and directories are stored in data blocks.

Description : Which of the following information about the UNIX file system is not correct? (A) Super block contains the number of i-nodes, the number of disk blocks, and the start of the list of free disk blocks. (B ... Each i-node is 256-bytes long. (D) All the files and directories are stored in data blocks. 

Last Answer : (C) Each i-node is 256-bytes long.

The virtual address generated by a CPU is 32 bits. The Translation Lookaside Buffer (TLB) can hold total 64 page table entries and a 4-way set associative (i.e. with 4- cache lines in the set). The page size is 4 KB. The minimum size of TLB tag is (A) 12 bits (B) 15 bits (C) 16 bits (D) 20 bits

Description : The virtual address generated by a CPU is 32 bits. The Translation Lookaside Buffer (TLB) can hold total 64 page table entries and a 4-way set associative (i.e. with 4- cache lines in the set). The page size is 4 KB. The minimum size of TLB tag is (A) 12 bits (B) 15 bits (C) 16 bits (D) 20 bits

Last Answer : (C) 16 bits Explanation: VirtualAddress = 32 bits PageSize = 4KB = 12 bits therefore : VPNTag = 20 bits, OffsetTag = 12 bits TLBEntryLength = VPNTag = 20 bits TotalTLBEntries = 64, 4-way implies ... therefore : TLBIndex = 4 bits TLBTag = TLBEntryLength - TLBIndex = 20 - 4 = 16 bits

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

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

................. maintains the list of free disk blocks in the Unix file system. (A) I-node (B) Boot block (C) Super block (D) File allocation table

Description : ................. maintains the list of free disk blocks in the Unix file system. (A) I-node (B) Boot block (C) Super block (D) File allocation table

Last Answer : (C) Super block 

A virtual memory has a page size of 1K words. There are eight pages and four blocks. The associative memory page table contains the following entries: Image Which of the following list of virtual addresses (in decimal) will not cause any page fault if referenced by the CPU? (A) 1024, 3072, 4096, 6144 (B) 1234, 4012, 5000, 6200 (C) 1020, 3012, 6120, 8100 (D) 2021, 4050, 5112, 7100

Description : A virtual memory has a page size of 1K words. There are eight pages and four blocks. The associative memory page table contains the following entries:  Which of the following list of virtual addresses (in ... 1234, 4012, 5000, 6200 (C) 1020, 3012, 6120, 8100 (D) 2021, 4050, 5112, 7100

Last Answer : Answer: C Explanation: The pages which are not in main memory are: 1020 will not cause page fault (1024-2047) 3012 will not cause page fault (3072-4095) 6120 will not cause page fault (4096-5119) 8100 will not cause page fault (6144-7167)

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

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

In Unix operating system, special files are used to : (A) buffer data received in its input from where a process reads (B) provide a mechanism to map physical device to file names (C) store list of file names plus pointers associated with i-nodes (D) store information entered by a user application program or utility program

Description : In Unix operating system, special files are used to : (A) buffer data received in its input from where a process reads (B) provide a mechanism to map physical device to file names (C ... pointers associated with i-nodes (D) store information entered by a user application program or utility program

Last Answer : (B) provide a mechanism to map physical device to file names 

What is the relationship between Bit, Byte, KB, MB, GB and TB ?

Description : What is the relationship between Bit, Byte, KB, MB, GB and TB ?

Last Answer : The capacity of a computer's memory can be determined by the number of bits , bytes, or words that it holds. Bytes are usually used to express memory. However, the bit is the smallest unit of the computer ... Kilobyte = 1 Megabyte (MB) 1024 Megabyte = 1 Gigabyte (GB) 1024 Gigabyte = 1 Terabyte (TB)

The term ‘giga byte’ equals to ________ A. 1024 byte B. 1024 KB C. 1024 GB D. 1024 MB

Description : The term ‘giga byte’ equals to ________ A. 1024 byte B. 1024 KB C. 1024 GB D. 1024 MB

Last Answer : D. 1024 MB

The IEEE-754 double-precision format to represent floating point numbers, has a length of ........... bits. (A) 16 (B) 32 (C) 48 (D) 64

Description : The IEEE-754 double-precision format to represent floating point numbers, has a length of ........... bits. (A) 16 (B) 32 (C) 48 (D) 64

Last Answer : (D) 64

A memory management system has 64 pages with 512 bytes page size. Physical memory consists of 32 page frames. Number of bits required in logical and physical address are respectively: (1) 14 and 15 (2) 14 and 29 (3) 15 and 14 (4) 16 and 32

Description : A memory management system has 64 pages with 512 bytes page size. Physical memory consists of 32 page frames. Number of bits required in logical and physical address are respectively: (1) 14 and 15 (2) 14 and 29 (3) 15 and 14 (4) 16 and 32

Last Answer : (3) 15 and 14

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

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

In ............ allocation method for disk block allocation in a file system, insertion and deletion of blocks in a file is easy. (A) Index (B) Linked (C) Contiguous (D) Bit Map

Description : In ............ allocation method for disk block allocation in a file system, insertion and deletion of blocks in a file is easy. (A) Index (B) Linked (C) Contiguous (D) Bit Map

Last Answer : (B) Linked

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 service are not influenced by file allocation method. (C) Caching the directories and index blocks in main memory can also help in reducing disk arm movements. (D) SCAN and C-SCAN algorithms are less likely to have a starvation problem.

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.

In the indexed scheme of blocks to a file, the maximum possible size of the file depends on: (A) The number of blocks used for index, and the size of index (B) Size of Blocks and size of Address (C) Size of Index (D) Size of Block

Description : In the indexed scheme of blocks to a file, the maximum possible size of the file depends on: (A) The number of blocks used for index, and the size of index (B) Size of Blocks and size of Address (C) Size of Index (D) Size of Block

Last Answer : (A) The number of blocks used for index, and the size of index

A 32-bit address bus allows access to a memory of capacity(a) 64 Mb (b) 16 Mb (c) 1Gb (d) 4 Gb 2.Which processor structure is pipelined? a) all x80 processors b) all x85 processors c) all x86 processors

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Last Answer : c) all x86 processors

An organization isgranteda block of classless addresses with the starting address 199.34.76.64/28. How manyaddresses are granted? A) 8 B) 16 C) 32 D) none of the above

Description : An organization isgranteda block of classless addresses with the starting address 199.34.76.64/28. How manyaddresses are granted? A) 8 B) 16 C) 32 D) none of the above

Last Answer : 16

The Internet addresses are ______ bits in length in IPV4 addressing scheme A. 16 B. 64 C. 32 D. 48

Description : The Internet addresses are ______ bits in length in IPV4 addressing scheme A. 16 B. 64 C. 32 D. 48

Last Answer : C. 32

The Internet addresses are ……….. bits in length in IPV4 addressing scheme a. 16 b. 64 c. 48 d. 32

Description : The Internet addresses are ……….. bits in length in IPV4 addressing scheme a. 16 b. 64 c. 48 d. 32

Last Answer : d. 32

If an integer occupies 4 bytes and a character occupies 1 byte of memory, each element of the following structure would occupy how many bytes ? struct name { int age; char name[30]; }; A) 30 B) 32 C) 34 D) 36

Description : If an integer occupies 4 bytes and a character occupies 1 byte of memory, each element of the following structure would occupy how many bytes ? struct name { int age; char name[30]; }; A) 30 B) 32 C) 34 D) 36

Last Answer : C) 34

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Description : The order of a leaf node in a B+ tree is the maximum number of children it can have. Suppose that block size is 1 kilobytes, the child pointer takes 7 bytes long and search field value takes 14 bytes long. The order of the leaf node is ............ (1) 16 (2) 63 (3) 64 (4) 65

Last Answer : Answer: All

Windows 32 API supports (A) 16-bit Windows (B) 32-bit Windows (C) 64-bit Windows (D) All of the above

Description : Windows 32 API supports (A) 16-bit Windows (B) 32-bit Windows (C) 64-bit Windows (D) All of the above

Last Answer : (D) All of the above

Which of the following statement is not correct with reference to cron daemon in UNIX O.S? (A) The cron daemon is the standard tool for running commands on a predetermined schedule. (B) It starts when the system boots and runs as long as the system is up. (C) Cron reads configuration files that contain list of command lines and the times at which they invoked. (D) Crontab for individual users are not stored.

Description : Which of the following statement is not correct with reference to cron daemon in UNIX O.S? (A) The cron daemon is the standard tool for running commands on a predetermined schedule. (B) It starts ... command lines and the times at which they invoked. (D) Crontab for individual users are not stored.

Last Answer : (D) Crontab for individual users are not stored.

Triple DES uses a. 168 bit keys on 64-bit blocks of plain text b. Working on 64-bit blocks of plain text and 56 bit keys by applying DES algorithm for three rounds. c. Works with 144 bit blocks of plain text and applies DES algorithm once. d. Uses 128 bit blocks of plain text and 112 bit keys and apply DES algorithm thrice.

Description : Triple DES uses a. 168 bit keys on 64-bit blocks of plain text b. Working on 64-bit blocks of plain text and 56 bit keys by applying DES algorithm for three rounds. c. Works with 144 bit ... algorithm once. d. Uses 128 bit blocks of plain text and 112 bit keys and apply DES algorithm thrice. 

Last Answer : b. Working on 64-bit blocks of plain text and 56 bit keys by applying DES algorithm for three rounds. 

In 8279, the keyboard entries are debounced and stored in an _________, that is further accessed by the CPU to read the key codes. a) 8-bit FIFO b) 8-byte FIFO c) 16 byte FIFO d) 16 bit FIFO

Description : In 8279, the keyboard entries are debounced and stored in an _________, that is further accessed by the CPU to read the key codes. a) 8-bit FIFO b) 8-byte FIFO c) 16 byte FIFO d) 16 bit FIFO

Last Answer : b) 8-byte FIFO

The directory structure used in Unix file system is called (A) Hierarchical directory (B) Tree structured directory (C) Directed acyclic graph (D) Graph structured directory

Description : The directory structure used in Unix file system is called (A) Hierarchical directory (B) Tree structured directory (C) Directed acyclic graph (D) Graph structured directory

Last Answer : (C) Directed acyclic graph

The Unix Kernel maintains two key data structures related to processes, the process table and the user structure. Which of following information is not the part of user structure? (A) File descriptor table (B) System call state (C) Scheduling parameters (D) Kernel stack

Description : The Unix Kernel maintains two key data structures related to processes, the process table and the user structure. Which of following information is not the part of user structure? (A) File descriptor table (B) System call state (C) Scheduling parameters (D) Kernel stack

Last Answer : (C) Scheduling parameters

IPv4 and IPv6 are addresses used to identify computers on the internet. Find the correct statement out of the following: (A) Number of bits required for IPv4 address is more than number of bits required for IPv6 address. (B) Number of bits required for IPv4 address is same as number of bits required for IPv6 address. (C) Number of bits required for IPv4 address is less than number of bits required for IPv6 address. (D) Number of bits required for IPv4 address is 64.

Description : IPv4 and IPv6 are addresses used to identify computers on the internet. Find the correct statement out of the following: (A) Number of bits required for IPv4 address is more than number of bits required for ... of bits required for IPv6 address. (D) Number of bits required for IPv4 address is 64. 

Last Answer : (C) Number of bits required for IPv4 address is less than number of bits required for IPv6 address.

The versions of windows operating system like windows XP and window Vista uses following file system: (A) FAT-16 (B) FAT-32 (C) NTFS (NT File System) (D) All of the above

Description : The versions of windows operating system like windows XP and window Vista uses following file system: (A) FAT-16 (B) FAT-32 (C) NTFS (NT File System) (D) All of the above

Last Answer : (D) All of the above

WOW32 is a: (A) Win 32 API library for creating processes and threads. (B) Special kind of file system to the NT name space. (C) Kernel - mode objects accessible through Win32 API (D) Special execution environment used to run 16 bit Windows applications on 32 - bit machines.

Description : WOW32 is a: (A) Win 32 API library for creating processes and threads. (B) Special kind of file system to the NT name space. (C) Kernel - mode objects accessible through Win32 API (D) Special execution environment used to run 16 bit Windows applications on 32 - bit machines.

Last Answer : (D) Special execution environment used to run 16 bit Windows applications on 32 - bit machines.

A unix file may be of type: (A) Regular file (B) Directory File (C) Device File (D) Any one of the above

Description : A unix file may be of type: (A) Regular file (B) Directory File (C) Device File (D) Any one of the above 

Last Answer : (D) Any one of the above

What will be the output of the following Unix command ? $rm chap0\[1 - 3\] (A) Remove file chap0[1 - 3] (B) Remove file chap01, chap02, chap03 (C) Remove file chap\[1 - 3\] (D) None of the above

Description : What will be the output of the following Unix command ? $rm chap0\[1 - 3\] (A) Remove file chap0[1 - 3] (B) Remove file chap01, chap02, chap03 (C) Remove file chap\[1 - 3\] (D) None of the above

Last Answer : (A) Remove file chap0[1 - 3]

In Unix, the command to enable execution permission for file “mylife” by all is ................ (A) Chmod ugo+X myfile (B) Chmod a+X myfile (C) Chmod +X myfile (D) All of the above

Description : In Unix, the command to enable execution permission for file “mylife” by all is ................ (A) Chmod ugo+X myfile (B) Chmod a+X myfile (C) Chmod +X myfile (D) All of the above

Last Answer : (D) All of the above

In Unix, the login prompt can be changed by changing the contents of the file ............... (A) contrab (B) init (C) gettydefs (D) inittab

Description : In Unix, the login prompt can be changed by changing the contents of the file ............... (A) contrab (B) init (C) gettydefs (D) inittab

Last Answer : Answer: C

What is the function of following UNIX command? WC – l<a >b& (A) It runs the word count program to count the number of lines in its input, a, writing the result to b, as a foreground process. (B) It runs the word count program to count the number of lines in its input, a, writing the result to b, but does it in the background. (C) It counts the errors during the execution of a process, a, and puts the result in process b. (D) It copies the ‘ l ’ numbers of lines of program from file, a, and stores in file b.

Description : What is the function of following UNIX command? WC - lb& (A) It runs the word count program to count the number of lines in its input, a, writing the result to b, as a foreground process. (B) It runs ... (D) It copies the l ' numbers of lines of program from file, a, and stores in file b.

Last Answer : (B) It runs the word count program to count the number of lines in its input, a, writing the result to b, but does it in the background.

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Description : Unix command to change the case of first three lines of file “shortlist” from lower to upper (1) $ tr ‘[a-z]’ ‘[A-Z]’ shortlist | head-3 (2) $ head-3 shortlist | tr ‘[a-z]’ ‘[A-Z]’ (3) $ tr head-3 shortlist ‘[A-Z]’ ‘[a-z]’ (4) $ tr shortlist head-3 ‘[a-z]’ ‘[A-Z]’

Last Answer : (2) $ head-3 shortlist | tr ‘[a-z]’ ‘[A-Z]’ 

IEEE 802.11 standards provide data rates ______________ A. 10 Gbit/s. B. 1 Gbit/s C. 1 Mb/s to up to 6.75 Gb/s D. 250 Kb/s

Description : IEEE 802.11 standards provide data rates ______________ A. 10 Gbit/s. B. 1 Gbit/s C. 1 Mb/s to up to 6.75 Gb/s D. 250 Kb/s

Last Answer : C. 1 Mb/s to up to 6.75 Gb/s 

Which of the following is not the java primitive type A) Byte B) Float C) Character D) Long double

Description : Which of the following is not the java primitive type A) Byte B) Float C) Character D) Long double

Last Answer : D) Long double

……………….. is a example of an operating system that support single user process and single thread. A) UNIX B) MS-DOS C) OS/2 D) Windows 2000

Description : ……………….. is a example of an operating system that support single user process and single thread. A) UNIX B) MS-DOS C) OS/2 D) Windows 2000

Last Answer : B) MS-DOS

Which would be better ? xiaomi redmi 8a 2/32 tecno spark 4 3/32 Which would be better to buy. And will the phone support 64 GB memory?

Description : Which would be better ? xiaomi redmi 8a 2/32 tecno spark 4 3/32 Which would be better to buy. And will the phone support 64 GB memory?

Last Answer : Tecno would be nice. Will support 64 GB.

Suppose a digitized voice channel is made by digitizing 8 kHz bandwidth analog voice signal. It is required to sample the signal at twice the highest frequency (two samples per hertz). What is the bit rate required, if it is assumed that each sample requires 8 bits? (A) 32 kbps (B) 64 kbps (C) 128 kbps (D) 256 kbps

Description : Suppose a digitized voice channel is made by digitizing 8 kHz bandwidth analog voice signal. It is required to sample the signal at twice the highest frequency (two samples per hertz). What is the bit rate required, if it ... sample requires 8 bits? (A) 32 kbps (B) 64 kbps (C) 128 kbps (D) 256 kbps

Last Answer : (C) 128 kbps

A dynamic RAM has refresh cycle of 32 times per msec. Each refresh operation requires 100 nsec and a memory cycle requires 250 nsec. What percentage of memory’s total operating time is required for refreshes? (A) 0.64 (B) 0.96 (C) 2.00 (D) 0.32

Description : A dynamic RAM has refresh cycle of 32 times per msec. Each refresh operation requires 100 nsec and a memory cycle requires 250 nsec. What percentage of memory’s total operating time is required for refreshes? (A) 0.64 (B) 0.96 (C) 2.00 (D) 0.32

Last Answer : Answer: D Explanation: in 1ms : refresh = 32 times Memory cycle = 1ms/250ns = 106ns/250ns = 4000 times Therefore, % of refresh time = (32 x 100ns)/(4000 x 250ns) = 3200ns/1000000 x 100% = 0.32%

If link transmits 4000 frames per second and each slot has 8 bits, the transmission rate of circuit of this TDM is ............... (A) 64 Kbps (B) 32 Mbps (C) 32 Kbps (D) 64 Mbps

Description : If link transmits 4000 frames per second and each slot has 8 bits, the transmission rate of circuit of this TDM is ............... (A) 64 Kbps (B) 32 Mbps (C) 32 Kbps (D) 64 Mbps

Last Answer : (C) 32 Kbps

In a packet switching network, if the message size is 48 bytes and each packet contains a header of 3 bytes. If 24 packets are required to transmit the message, the packet size is ................ (1) 2 bytes (2) 1 byte (3) 4 bytes (4) 5 bytes

Description : In a packet switching network, if the message size is 48 bytes and each packet contains a header of 3 bytes. If 24 packets are required to transmit the message, the packet size is ................ (1) 2 bytes (2) 1 byte (3) 4 bytes (4) 5 bytes

Last Answer : (4) 5 bytes 

An ICMP message has _____ headerand a variable-size data section. A) a 16-byte B) a 32-byte C) an 8-byteD) noneof the above

Description : An ICMP message has _____ headerand a variable-size data section. A) a 16-byte B) a 32-byte C) an 8-byte D) noneof the above

Last Answer : an 8-byte

A typical personal computer used for business purposes would have of RAM. A) 4 KB B) 16 K C) 64 K D) 256 K

Description : A typical personal computer used for business purposes would have of RAM. A) 4 KB B) 16 K C) 64 K D) 256 K

Last Answer : Answer : D

A typical personal computer used for business purposes would have… of RAM. a. 4 KB b. 16 K c. 64 K d. 256 K

Description : A typical personal computer used for business purposes would have… of RAM. a. 4 KB b. 16 K c. 64 K d. 256 K

Last Answer : d. 256 K