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PROGRAM
Bachelor
of Science in Information Technology - B.SC(IT)
SEMESTER
III
SUBJECT
CODE & NAME
BIT301 –
Operating System
Qus:1 What are the different operation performed by
operating system?
Answer: Operating System is a System Software (Set of system
programs) which provides an environment to the user so that they can execute
the programs or instruct the computer to do certain work i.e. provide interface
for user to communicate with the computer system. The Operating System acts as
a resource manager which allocates and manages various resources like processor(s),
main
Qus:2 Mention different states of a process.
Answer: A program in execution is called a process. A process is
executed sequentially, one instruction at a time. A program is a passive
entity. For example, a file on the disk. A process on the other hand is an
Qus:3 What are the necessary conditions for a deadlock?
Answer: Deadlock
prevention algorithms ensure that at least one of the four necessary conditions
for deadlocks namely mutual exclusion, hold and wait, no preemption and
circular wait do
Qus:4 Write a short note on Multi-programmed Batched Operating
Systems.
Answer: The concept of spooling introduced an important data
structure called the job pool. Spooling creates several jobs on the disk ready
for execution or processing. The operating system now has to choose from the
job pool, a job that is to be executed next. This increases CPU utilization as
CPU is
Qus:5 What are the different information stored in a process
control block (PCB)?
Answer: In order to manage and coordinate the various processes, the
operating system identify these processes in terms of numbers and Process
Control Block (PCB). A Process Control Block is a data structure maintained by
the Operating System for every process. A PCB keeps all the information needed
to keep track of a process. The PCB serves as a repository of
Qus:6 Discuss in details about deadlock prevention.
Answer: The four necessary conditions for deadlocks to occur are
mutual exclusion, hold and wait, no preemption and circular wait. If any one of
the above four conditions does not hold, then deadlocks will not occur. Thus
prevention of deadlock is possible by ensuring that at least one of the
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PROGRAM
Bachelor
of Science in Information Technology - B.SC(IT)
SEMESTER
III
SUBJECT
CODE & NAME
BIT302 –
Computer Networks
Qus:1 Discuss about different network hardware by scale.
Answer: In broadcast network, communication channel is shared by all
the machines on the network. Broadcast systems allow the possibility of
addressing a packet to all the destinations by specifying a special code in the
address field. This packet is received and processed by every machine on the
network
Qus:2 Discuss briefly about Byte-Oriented Protocols (BISYNC,
PPP, DDCMP).
Answer: This is one of the oldest approach in framing, which
consider each frame as a collection of bytes, rather than a collection of bits.
Byte-oriented approach is represented by older protocols such
Qus:3 Discuss briefly Virtual-Circuit Networks.
Answer: Networks
having connection oriented services in the network layer are called Virtual
Circuit networks and these network layer connections are called virtual
circuits (VCs). Let’s now consider how a VC
Qus:4 Discuss in details about OSI Reference Model.
Answer: The OSI Model is based on the protocol developed by ISO
(International Standards Organization) as the first step towards international
standardization of the protocols used in the various layers. This model deals
with connecting open systems, so it is called ISO OSI (Open Systems
Interconnectio
Qus:5 Discuss in details about Clock-based Framing (SONET).
Answer: Clock- based framing is another approach to framing, and is
represented by the Synchronous Optical Network (SONET) standard. SONET was
first proposed by Bell Communications Research (Bellcore), and then developed
under the American National Standards Institute (
Qus:6 Discuss in details about Internet protocol version 4 (IPV4).
Answer: IPV4 is a connectionless protocol
and is unreliable. It is primarily responsible for addressing and routing
packets between hosts. A higher layer protocol such as TCP or an application
protocol must acknowledge delivered packets and recover lost packets if
required. IPV4 is defined in RFC 791. Figure shows the datagram format of IPV4.
It consist of IPV4 header and Payload.
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PROGRAM
Bachelor
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SEMESTER
III
SUBJECT
CODE & NAME
BIT303 –
OBJECT ORIENTED PROGRAMMING – JAVA
Qus:1 What are the different features of Java?
Answer: The Java buzzwords or features of Java
The fundamental forces that
necessitated the invention of Java are portability and security but other
factors also played an important role in molding the final form of the
language. The key considerations that characterizes Java programming language
are the following list of buzzwords:
Qus:2 Discuss different control flow statements in Java.
Answer: To control the flow of execution in a program the following
statements are used:
1. Decision Making Statements
If-else
Qus:3 Explain with example exception handling techniques.
Answer: Java
creates an object of appropriate exception class whenever there a error occurs
in your method. Once the exception objects are created it is passed to your
program. This is called throwing an
Qus:4 What is a Java Virtual Machine (JVM)?
Answer: JVM (Java Virtual Machine) is an abstract machine, i.e., it
is a software implementation of a computer that executes programs like a real
machine. It specifies and provides runtime environment where java bytecode can
be executed. Since JVM is a software implementation, it is written specifically
for a specific operating system. So JVM is platform dependent because
configuration of each OS differs. For example, a special implementation is
required for Lin
Qus:5 What do you understand by enhance for statement?
Answer: An another form of for statement also exists. It
performs iteration
Qus:6 What are exception in Java? (Mention different types).
Answer: The term exception in Java means occurrence of an
exceptional event. It is defined as abnormality that occurs while the program
is in execution which hinders successful execution of the program, which means
the way the program is meant to produce result it doesn’t do so. When you are
developing apps Error Handling is very necessary. The abnormalities or
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PROGRAM
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SEMESTER
III
SUBJECT
CODE & NAME
BIT304 –
Data Base Management System
Qus:1 What are the properties of database?
Answer: The database is a collection of related data. In a file
system, the fundamental component of a file is a data item, which is the smallest named unit of data that has
meaning in the real world – for example, last name, first name, street address,
ID number, or political party. A group of
Qus:2 Write a note on hierarchal model.
Answer: The hierarchical data model organizes data in a tree
structure. There is a hierarchy of parent and
Qus:3 Discuss select statement with example.
Answer: The
select statement specifies the method of selecting the tuples of the
relations(s). The tuples processed are from one or more relations specified by
the form clause of the select statement. The basic form of
Qus:4 What are the different function of database management
system?
Answer: There are several functions that a DBMS performs to ensure
data integrity and consistency of data in the database. The ten functions in
the DBMS are: data dictionary management, data storage management, data
transformation and presentation, security management, multiuser access control,
backup and recovery management, data integrity management,
Qus:5 Discuss briefly relative data model.
Answer: The relational model today, is the primary data model for
commercial data processing applications. It has attained its primary position
because of its simplicity, which eases the job of the programmer, as
compared to earlier data models such as the network model or
Qus:6 What are subqueries? Explain with example.
Answer: The expression following WHERE can be either a simple
predicate as explained above or it can be a query itself! This part of the
query following WHERE is called a Subquery.
A subquery, which
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