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

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
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(C) Directed acyclic graph
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A …………… is an acyclic digraph, which has only one node with indegree 0, and other nodes have indegree 1. A) Directed tree B) Undirected tree C) Dis-joint tree D) Direction oriented tree

Description : A …………… is an acyclic digraph, which has only one node with indegree 0, and other nodes have indegree 1. A) Directed tree B) Undirected tree C) Dis-joint tree D) Direction oriented tree

Last Answer : A) Directed tree

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

Graph used to represent semantic network is _____________ a) Undirected graph b) Directed graph c) Directed Acyclic graph (DAG) d) Directed complete graph

Description : Graph used to represent semantic network is _____________ a) Undirected graph b) Directed graph c) Directed Acyclic graph (DAG) d) Directed complete graph

Last Answer : b) Directed 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

A directed graph is ………………. if there is a path from each vertex to every other vertex in the digraph. A) Weakly connected B) Strongly Connected C) Tightly Connected D) Linearly Connected

Description : A directed graph is ………………. if there is a path from each vertex to every other vertex in the digraph. A) Weakly connected B) Strongly Connected C) Tightly Connected D) Linearly Connected

Last Answer : B) Strongly Connected

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

................. 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 

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 

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

Description : 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

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.

Consider the following statements : (a) Boolean expressions and logic networks correspond to labelled acyclic digraphs. (b) Optimal Boolean expressions may not correspond to simplest networks. (c) Choosing essential blocks first in a Karnaugh map and then greedily choosing the largest remaining blocks to cover may not give an optimal expression. Which of these statement(s) is/ are correct? (A) (a) only (B) (b) only (C) (a) and (b) (D) (a), (b) and (c)

Description : Consider the following statements : (a) Boolean expressions and logic networks correspond to labelled acyclic digraphs. (b) Optimal Boolean expressions may not correspond to simplest networks. (c) Choosing essential blocks first in a Karnaugh map ... (b) only (C) (a) and (b) (D) (a), (b) and (c)

Last Answer : (D) (a), (b) and (c) 

File management function of the operating system includes i) File creation and deletion ii) Disk scheduling iii) Directory creation iv) Mapping file in secondary storage. A) i, ii and iii only B) i, iii and iv only C) ii, iii and iv only D) All i, ii, iii and iv

Description : File management function of the operating system includes i) File creation and deletion ii) Disk scheduling iii) Directory creation iv) Mapping file in secondary storage. A) i, ii and iii only B) i, iii and iv only C) ii, iii and iv only D) All i, ii, iii and iv

Last Answer : B) i, iii and iv only

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.

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]’

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]’ 

Which of the following operations can be performed by using FTP. i) Connect to a remote host ii) Select directory iii) Define the transfer mode iv) List file available A) i, and ii only B) i, ii and iii only C) ii, iii and iv only D) All i, ii, iii and iv

Description : Which of the following operations can be performed by using FTP. i) Connect to a remote host ii) Select directory iii) Define the transfer mode iv) List file available A) i, and ii only B) i, ii and iii only C) ii, iii and iv only D) All i, ii, iii and iv

Last Answer : C) ii, iii and iv only

Which field of cookie in WWW represents the server's directory structure by identifying the utilization of part associated with server's file tree? a. Domain b. Path c. Content d. Secure

Description : Which field of cookie in WWW represents the server's directory structure by identifying the utilization of part associated with server's file tree? a. Domain b. Path c. Content d. Secure

Last Answer : b. Path

………………. Is a directed tree in which outdegree of each node is less than or equal to two. A) Unary tree B) Binary tree C) Dinary tree D) Both B and C

Description : ………………. Is a directed tree in which outdegree of each node is less than or equal to two. A) Unary tree B) Binary tree C) Dinary tree D) Both B and C

Last Answer : B) Binary tree

Which of the following is not a type of Database Management System? (A) Hierarchical (B) Network (C) Relational (D) Sequential

Description : Which of the following is not a type of Database Management System? (A) Hierarchical (B) Network (C) Relational (D) Sequential 

Last Answer : (D) Sequential

The agency that sits between the user and the UNIX system is called the A. logic B. profile C. shell D. erxc E. None of the above

Description : The agency that sits between the user and the UNIX system is called the A. logic B. profile C. shell D. erxc E. None of the above

Last Answer : C. shell

Which statement is not true about process 0 in the Unix operating system? (A) Process 0 is called init process. (B) Process 0 is not created by fork system call. (C) After forking process 1, process 0 becomes swapper process. (D) Process 0 is a special process created when system boots.

Description : Which statement is not true about process 0 in the Unix operating system? (A) Process 0 is called init process. (B) Process 0 is not created by fork system call. (C) After forking process 1, process 0 becomes swapper process. (D) Process 0 is a special process created when system boots.

Last Answer : (A) Process 0 is called init process.

A top-to-bottom relationship among the items in a database is established by a A) Hierarchical schema B) Network schema C) Relational Schema D) All of the above

Description : A top-to-bottom relationship among the items in a database is established by a A) Hierarchical schema B) Network schema C) Relational Schema D) All of the above

Last Answer : A) Hierarchical schema

In hierarchical routing with 4800 routers, what region and cluster sizes should be chosen to minimize the size of the routing table for a three layer hierarchy? (A) 10 clusters, 24 regions and 20 routers (B) 12 clusters, 20 regions and 20 routers (C) 16 clusters, 12 regions and 25 routers (D) 15 clusters, 16 regions and 20 routers

Description : In hierarchical routing with 4800 routers, what region and cluster sizes should be chosen to minimize the size of the routing table for a three layer hierarchy? (A) 10 clusters, 24 regions and 20 routers (B ... (C) 16 clusters, 12 regions and 25 routers (D) 15 clusters, 16 regions and 20 routers

Last Answer : (D) 15 clusters, 16 regions and 20 routers Rooters minimum, then regions minimum, then clusters minimum.

………….. gives defining the flow of the data through and organization or a company or series of tasks that may or may not represent computerized processing. A) System process B) System flowchart C) System design D) Structured System

Description : ………….. gives defining the flow of the data through and organization or a company or series of tasks that may or may not represent computerized processing. A) System process B) System flowchart C) System design D) Structured System

Last Answer : B) System flowchart

State true or false. i) Unix, support multiple user process but only support one thread per process. ii) A java run time environment is an example of a system of one process with multiple threads. A) True, False B) True, True C) False, True D) False, False

Description : State true or false. i) Unix, support multiple user process but only support one thread per process. ii) A java run time environment is an example of a system of one process with multiple threads. A) True, False B) True, True C) False, True D) False, False

Last Answer : B) True, True

……………….. 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 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.

Which of the following option with reference to UNIX operating system is not correct?

Description : Which of the following option with reference to UNIX operating system is not correct? (A) INT signal is sent by the terminal driver when one types and it is a request to terminate the current operation. ( ... that it defaults to producing a core dump if not caught. (D) KILL is a blockable signal.

Last Answer : (D) KILL is a blockable signal.

In UNIX operating system, when a process creates a new process using the fork() system call, which of the following state is shared between the parent process and child process? (A) Heap (B) Stack (C) Shared memory segments (D) Both Heap and Stack

Description : In UNIX operating system, when a process creates a new process using the fork() system call, which of the following state is shared between the parent process and child process? (A) Heap (B) Stack (C) Shared memory segments (D) Both Heap and Stack

Last Answer : (C) Shared memory segments 

Which statement is not correct about “init” process in Unix? (1) It is generally the parent of the login shell. (2) It has PID 1. (3) It is the first process in the system. (4) Init forks and execs a ‘getty’ process at every port connected to a terminal.

Description : Which statement is not correct about “init” process in Unix? (1) It is generally the parent of the login shell. (2) It has PID 1. (3) It is the first process in the system. (4) Init forks and execs a ‘getty’ process at every port connected to a terminal.

Last Answer : It is the first process in the system.

The ____ namespace is based on a hierarchical and logical tree structure A. DNS B. Address C. table D. both a and b

Description : The ____ namespace is based on a hierarchical and logical tree structure A. DNS B. Address C. table D. both a and b

Last Answer : A. DNS

The database in which records are organised in a tree-like structure is (1) Network database (2) Hierarchical database (3) Relational database (4) Object-oriented database

Description : The database in which records are organised in a tree-like structure is (1) Network database (2) Hierarchical database (3) Relational database (4) Object-oriented database

Last Answer : Hierarchical database

………………… is a full form of SQL. A) Standard query language B) Sequential query language C) Structured query language D) Server side query language

Description : ………………… is a full form of SQL. A) Standard query language B) Sequential query language C) Structured query language D) Server side query language

Last Answer : A) Standard query language

In Unix, how do you check that two given strings a and b are equal ? (A) test $a -eq $b (B) test $a -equal $b (C) test $a=$b (D) Sh -C test $a==$b

Description : In Unix, how do you check that two given strings a and b are equal ? (A) test $a -eq $b (B) test $a -equal $b (C) test $a=$b (D) Sh -C test $a==$b

Last Answer : (C) test $a=$b Answer: C Explanation: Tests for a zero-length string: test -z string Tests for a nonzero string length: test -n string Tests two strings for equality: ... Tests two strings for inequality: test string1 != string2 Tests for a nonzero string length: test string

The Unix command: $ vi file1 file2 (A) Edits file1 and stores the contents of file1 in file2 (B) Both files i.e. file1 and file2 can be edited using ‘ex’ command to travel between files (C) Both files can be edited using the ‘mv’ command to move between the files (D) Edits file1 first, saves it and the edits file2

Description : The Unix command: $ vi file1 file2 (A) Edits file1 and stores the contents of file1 in file2 (B) Both files i.e. file1 and file2 can be edited using ex' command to travel between files (C) Both ... using the mv' command to move between the files (D) Edits file1 first, saves it and the edits file2

Last Answer : (B) Both files i.e. file1 and file2 can be edited using ‘ex’ command to travel between files

In UNIX, processes that have finished execution but have not yet had their status collected are known as ................ (A) Sleeping processes (B) Stopped Processes (C) Zombie Processes (D) Orphan Processes

Description : In UNIX, processes that have finished execution but have not yet had their status collected are known as ................ (A) Sleeping processes (B) Stopped Processes (C) Zombie Processes (D) Orphan Processes

Last Answer : (C) Zombie Processes 

In UNIX, ............ creates three subdirectories: 'PIS' and two subdirectories 'progs' and ‘data’ from just created subdirectory 'PIS'. (A) mdkir PIS/progs PIS/data PIS (B) mkdir PIS progs data (C) mkdir PIS PIS/progs PIS/data (D) mkdir PIS/progs data

Description : In UNIX, ............ creates three subdirectories: 'PIS' and two subdirectories 'progs' and ‘data’ from just created subdirectory 'PIS'. (A) mdkir PIS/progs PIS/data PIS (B) mkdir PIS progs data (C) mkdir PIS PIS/progs PIS/data (D) mkdir PIS/progs data

Last Answer : (C) mkdir PIS PIS/progs PIS/data

Which of the following connected simple graph has exactly one spanning tree? (A) Complete graph (B) Hamiltonian graph (C) Euler graph (D) None of the above

Description : Which of the following connected simple graph has exactly one spanning tree? (A) Complete graph (B) Hamiltonian graph (C) Euler graph (D) None of the above

Last Answer : (D) None of the above

A certain tree has two vertices of degree 4, one vertex of degree 3 and one vertex of degree 2. If the other vertices have degree 1, how many vertices are there in the graph? (A) 5 (B) n – 3 (C) 20 (D) 11

Description : A certain tree has two vertices of degree 4, one vertex of degree 3 and one vertex of degree 2. If the other vertices have degree 1, how many vertices are there in the graph? (A) 5 (B) n – 3 (C) 20 (D) 11

Last Answer : (D) 11

Which of the following statements is false? (A) Optimal binary search tree construction can be performed efficiently using dynamic programming. (B) Breadth-first search cannot be used to find connected components of a graph. (C) Given the prefix and postfix walks of a binary tree, the tree cannot be reconstructed uniquely. (D) Depth-first-search can be used to find the components of a graph. (1) A (2) B (3) C (4) D

Description : Which of the following statements is false? (A) Optimal binary search tree construction can be performed efficiently using dynamic programming. (B) Breadth-first search cannot be used to find connected components of a graph. (C) ... used to find the components of a graph. (1) A (2) B (3) C (4) D 

Last Answer : Answer: 2

Which of the following commands is used to display the directory attributes rather than its contents? A. ls -l -d B. ls -l C. ls -x D. ls -F E. None of the above

Description : Which of the following commands is used to display the directory attributes rather than its contents? A. ls -l -d B. ls -l C. ls -x D. ls -F E. None of the above

Last Answer : A. ls -l -d

Which command is used to remove a directory? A. rd B. rmdir C. dldir D. rdir E. None of the above

Description : Which command is used to remove a directory? A. rd B. rmdir C. dldir D. rdir E. None of the above

Last Answer : B. rmdir

Which command is used to copy all files having the string chap and any two characters after that to the progs directory? A. cp chap?? progs B. cp chap* progs C. cp chap[12] /progs/*.*

Description : Which command is used to copy all files having the string chap and any two characters after that to the progs directory? A. cp chap?? progs B. cp chap* progs C. cp chap[12] /progs/*.*

Last Answer : A. cp chap?? progs

The mv command changes (A) the inode (B) the inode-number (C) the directory entry (D) both the directory entry and the inode

Description : The mv command changes (A) the inode (B) the inode-number (C) the directory entry (D) both the directory entry and the inode

Last Answer : (C) the directory entry

The directory can be viewed as .................... that translates filenames into their directory entries. (A) Symbol table (B) Partition (C) Swap space (D) Cache

Description : The directory can be viewed as .................... that translates filenames into their directory entries. (A) Symbol table (B) Partition (C) Swap space (D) Cache

Last Answer : (A) Symbol table

Which of the following statement(s) is/are correct? (1) Persistence is the term used to describe the duration of phosphorescence. (2) The control electrode is used to turn the electron beam on and off. (3) The electron gun creates a source of electrons which are focussed into a narrow beam directed at the face of CRT. (4) All of the above.

Description : Which of the following statement(s) is/are correct? (1) Persistence is the term used to describe the duration of phosphorescence. (2) The control electrode is used to turn the electron beam on and off. (3) ... which are focussed into a narrow beam directed at the face of CRT. (4) All of the above. 

Last Answer : All of the above.