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Verizon Technical Questions - 11 September 2011

Posted on :10-02-2016
Verizon Technical Questions - 11 September 2011:-

Q1. The process which terminates before the parent process exists, is called as

A) Zombie
B) Orphan
C) Child
D) None of the other option listed for this question


Q2.  Join that returns those rows from a table which have no direct match in the other table is:

A) Outer join
B) inner join
C) Equijoin
D) Self join


Q3. Which of the following is / are sample(s) of data model?

A) Relational
B) Rational
C) Entity- relationship
D) None of the other option listed for this question


Q4. The term inner join refers to:

A) Joins between two tables in the same schema.
B) An equality join based on one column from each table.
C) A table joined with itself.
D) A Cartesian product join.


Q5. To produce a meaningful result set without any Cartesian products, what is the minimum number of conditions that should appear in the WHERE clause of a four table join?

A) 1
B) 4
C) 2
D) 8


Q6. What kind of relationship exist between customers and salespersons if each customer may have one or more salespersons, and each salesperson may have one or more customers?

A) one-to-one
B) one to many
C) many to many
D) many to one


Q7. What is the output of the following function if the following parameter is passed into the function as shown below function( 12345);

long function(char *a)
int n=O; int sign; sign =(*s==,,)?1 : 1; if(*S == .2 11 *8
S++;
for(*s >=,0,&& *s;)


Q8. The major number for a floppy disk device is

A) 1 
B) 3 
C) 2 
D) 4


Q9. Lilo is:

A) Uninstalls the boot loader
B) Installs the boot loader
C) Is a login utility
D) Invokes a daemon to logoff


Q10. The following socket provides two way, sequenced, reliable and unduplicated flow of data with no record boundaries.

A) Sequential packet socket
B) Datagram socket
C) Stream socket
D) Raw socket


Q11. Identify the point(s) that is true with respect to Semaphore

A) Only one process at a time can update a semaphore.
B) All the other options listed for this question
C) They are often used to monitor and control the availability of system resources such as shared memory segments.
D) Is a process with exclusive use of a semaphore terminates abnormally and fails to undo the operation or free the semaphore, the semaphore stays locked in the state the process left it. 


Q12.  When a single entity is related to itself then the relationship is termed as

A) ONE TO-ONE
B) ONE-TO-MANY
C) RECURSIVE
D) MANY-TO-MANY


Q13. The following is a valid SET operation.

A) Join
B) Insert
C) Select
D) Difference


Q14.  In hierarchical database,

A) There is one to many relationship
B) A child may have more than one parent
C) A parent may have more than one child
D) There is no restriction on the number of parents a child may have or the number of children a parent may have


Q15. Which type of join is used in this query?

SELECT last-name Name, hire-date Hire Date, loc Location
FROM employee, department WHERE employee.deptno = department.deptno.

A) Outer join
B) Self join
C) Equijoin
D) Non-equijoin


Q16. Chown is:

A) Changes the mode of operation to kernel mode
B) Creates a thread
C) Changes the users and/or group ownership of each given file
D) Creates a child process


Q17. The primary characteristic of a key field as that it must be

A) A NAME
B) TEXT
C) UNIQUE
D) ALL OF THE OTHER OPTION LISTED FOR THIS QUESTION


Q18. Which of the following means allowing objects of different types to be considered as example of a higher level set.

A) Aggregation
B) Specialization
C) Generalization
D) Decomposition


Q19. Net device

A) Provides low level access to Linux network devices
B) Provides low level access to Linux storage devices
C) Provides an interface to communicate with graphic devices
D) None of the other option listed for this question


Q20. A relation R is said to be in the ---, if it is in BCNF and there are non-trivial multi valued dependencies.

A) 1st NF
B) 2nd NF
C) 3rd NF
D) 4th NF


Q21. Context switch means

A) Kernel switches from executing one process to another.
B) Process switches from kernel mode to user mode.
C) Process switches from user mode to kernel mode.
D) None of the other option listed for this question


Q22.  A ---- occurs when a weak entity does not have a candidate key and its instances are indistinguishable without a relationship with another entity.

A) Existence dependency
B) Identifier dependency
C) Referential dependency
D) None of the other option listed for this question


Q23. Identify the point(s) that is not true with respect to signals

A) Signals are software generated interrupts that are sent to a process when an event happens
B) Signal delivery is analogous to hardware interrupts in that a signal can be blocked from being delivered in the future.
C) Most signals are synchronous by nature.
D) Most signal cause termination of the receiving process if no action is taken by the process in response to the signal.


  
   






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