Dbatu Previous Year Question Papers with Answers

Dbatu Previous Year Question Paper

Understanding previous year question papers helps students prepare effectively for exams. This guide provides a comprehensive list of questions and answers for various subjects in DBATU. Each subject has been covered with relevant questions and answers to support learning and exam readiness.

Computer Science Engineering

Question: What is the purpose of an operating system?
Answer:
The operating system manages hardware and software resources, providing services to applications and users.

Question: Explain the concept of virtual memory.
Answer:
Virtual memory allows the execution of processes larger than physical memory by using disk storage as an extension of RAM.

Question: What is a deadlock in operating systems?
Answer:
A deadlock occurs when processes are unable to proceed because they are waiting for resources held by each other.

Question: Describe the difference between TCP and UDP protocols.
Answer:
TCP is connection-oriented, ensuring reliable data transfer, while UDP is connectionless and focuses on speed over reliability.

Question: What is a database management system (DBMS)?
Answer:
A DBMS is software that enables users to create, manage, and manipulate databases efficiently.

Question: Define normalization in databases.
Answer:
Normalization is the process of organizing data to reduce redundancy and improve data integrity.

Question: What is a binary search tree?
Answer:
A binary search tree is a data structure where each node has at most two children, with left nodes smaller and right nodes larger than the parent.

Question: Explain polymorphism in object-oriented programming.
Answer:
Polymorphism allows objects to take multiple forms, enabling methods to operate differently based on the object.

Question: What are the different types of software testing?
Answer:
Software testing types include unit testing, integration testing, system testing, and acceptance testing.

Question: What is an IP address?
Answer:
An IP address is a unique identifier for devices on a network, enabling communication between them.

Question: Define cloud computing.
Answer:
Cloud computing provides on-demand access to computing resources over the internet, offering scalability and flexibility.

Question: What is a compiler?
Answer:
A compiler translates high-level programming language code into machine code for execution.

Question: What is the purpose of a firewall in networking?
Answer:
A firewall protects networks by filtering incoming and outgoing traffic based on security rules.

Question: Describe inheritance in object-oriented programming.
Answer:
Inheritance allows a class to acquire properties and methods of another class, promoting code reuse.

Question: What is the function of a DNS server?
Answer:
A DNS server translates domain names into IP addresses, facilitating access to websites.

Question: Explain the term “Big Data.”
Answer:
Big Data refers to large and complex datasets that traditional data processing tools cannot handle effectively.

Question: What is an algorithm?
Answer:
An algorithm is a step-by-step procedure for solving a problem or performing a computation.

Question: What is the difference between primary and secondary memory?
Answer:
Primary memory (RAM) is volatile and fast, while secondary memory (hard drives) is non-volatile and used for long-term storage.

Question: What is the significance of cache memory?
Answer:
Cache memory stores frequently accessed data, improving processing speed and system performance.

Mechanical Engineering

Question: What is the first law of thermodynamics?
Answer:
The first law of thermodynamics states that energy cannot be created or destroyed, only transformed.

Question: Define entropy.
Answer:
Entropy is a measure of the disorder or randomness in a system.

Question: What is the function of a boiler?
Answer:
A boiler generates steam by heating water for use in industrial processes or heating systems.

Question: What is the purpose of a flywheel in an engine?
Answer:
A flywheel maintains the angular momentum of an engine, ensuring smooth operation.

Question: Explain the concept of stress and strain.
Answer:
Stress is the internal resistance of a material to deformation, while strain is the deformation itself due to stress.

Question: What is a four-stroke engine?
Answer:
A four-stroke engine completes one power cycle in four strokes of the piston: intake, compression, power, and exhaust.

Question: Define the term “viscosity.”
Answer:
Viscosity is the measure of a fluid’s resistance to flow.

Question: What is the difference between laminar and turbulent flow?
Answer:
Laminar flow is smooth and orderly, while turbulent flow is chaotic and irregular.

Question: What is Pascal’s law?
Answer:
Pascal’s law states that pressure applied to a fluid in a confined space is transmitted equally in all directions.

Question: What is a centrifugal pump?
Answer:
A centrifugal pump uses rotational energy to increase the pressure and flow of a fluid.

Question: What is the purpose of a heat exchanger?
Answer:
A heat exchanger transfers heat between two or more fluids without mixing them.

Question: Define the term “refrigeration.”
Answer:
Refrigeration is the process of removing heat from a space or substance to lower its temperature.

Question: What is a gear ratio?
Answer:
A gear ratio is the ratio of the rotational speeds of two gears in contact.

Question: Explain the working principle of a hydraulic press.
Answer:
A hydraulic press uses Pascal’s law to amplify force by applying pressure through a fluid.

Question: What is the difference between ductile and brittle materials?
Answer:
Ductile materials can stretch under stress, while brittle materials break without significant deformation.

Question: Define specific heat capacity.
Answer:
Specific heat capacity is the amount of heat required to raise the temperature of a unit mass of a substance by one degree Celsius.

Question: What is the Carnot cycle?
Answer:
The Carnot cycle is a theoretical thermodynamic cycle with maximum efficiency, involving isothermal and adiabatic processes.

Question: Explain the term “torque.”
Answer:
Torque is a rotational force applied to an object, causing it to rotate around an axis.

Question: What is the function of a clutch in a vehicle?
Answer:
A clutch connects and disconnects the engine from the transmission, allowing smooth gear changes.

Electrical Engineering

Question: What is Ohm’s law?
Answer:
Ohm’s law states that the current through a conductor is directly proportional to the voltage across it and inversely proportional to the resistance.

Question: Define a transformer.
Answer:
A transformer is an electrical device that changes the voltage level of alternating current.

Question: What is the difference between AC and DC current?
Answer:
AC current alternates direction, while DC current flows in a single direction.

Question: Explain the purpose of a circuit breaker.
Answer:
A circuit breaker protects electrical circuits from damage due to overloads or short circuits by interrupting the current flow.

Question: What is a three-phase system?
Answer:
A three-phase system uses three alternating currents, offset by 120 degrees, to provide a constant power supply.

Question: Define inductance.
Answer:
Inductance is the property of a conductor to oppose changes in current flow through it.

Question: What is a diode?
Answer:
A diode is an electronic component that allows current to flow in one direction only.

Question: What is the difference between a synchronous and an asynchronous motor?
Answer:
A synchronous motor operates at constant speed with synchronized current frequency, while an asynchronous motor’s speed varies with load.

Question: What is power factor?
Answer:
Power factor is the ratio of real power to apparent power in an electrical circuit, indicating efficiency.

Question: Define Kirchhoff’s voltage law.
Answer:
Kirchhoff’s voltage law states that the sum of all voltages around a closed circuit loop is zero.

Question: What is the purpose of a rectifier?
Answer:
A rectifier converts alternating current (AC) to direct current (DC).

Question: What is an op-amp?
Answer:
An op-amp, or operational amplifier, is a high-gain voltage amplifier used in various circuits.

Question: Define the term “resistor.”
Answer:
A resistor is an electrical component that limits or regulates the flow of current in a circuit.

Question: What is an alternator?
Answer:
An alternator generates alternating current electricity by converting mechanical energy.

Question: What is the purpose of an inductor?
Answer:
An inductor stores energy in a magnetic field when electrical current flows through it.

Question: What is a capacitor?
Answer:
A capacitor stores electrical energy in an electric field and releases it when needed.

Question: What is the difference between active and passive components?
Answer:
Active components require external power for operation, while passive components do not.