IES Syllabus 2024: Download Latest Syllabus PDF

Indian Engineering Services Exam 2024 ( IES )

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Admit Card: 28 Jan '24 - 17 Feb '24

Rachit Kumar Saxena

Rachit Kumar SaxenaManager-Editorial

Updated on May 1, 2023 01:24 IST

IES syllabus is the most important and crucial component of the IES exam. The candidates are also required to prepare the subtopics associated with the given topics. The candidates are required to prepare the dynamics and interdependence of the topics. IES Syllabus 2023 was released with the official notification released online on September 14, 2022. The Union Public Service Commission (UPSC) released the official notification for 327 vacancies but later the IES vacancies 2023 were increased to 337. The candidates must prepare all the topics and subtopics for the examination because there is no mention of the weightage of the topics in the official syllabus. 

IES Syllabus 2023 is the guiding path for the candidates. The candidates are suggested to prepare all the topics mentioned in the official notification. The Commission can ask anything from the given topics because the Commission does not mention the weightage of the topics in the official notification. The Commission conduct the Prelims and main exam separately but most of the topics are common for both the stages of examination. The IES 2023 prelims exam was conducted on February 19 as per the syllabus mentioned in the official notification. The Commission released the IES 2023 syllabus with the official notification on September last year. UPSC IES syllabus coupled with the previous year's question papers, answer key and cutoff can provide a real insight into the exam. 

Before going into the topics mentioned in the official syllabus, the candidates should look at and understand the IES exam pattern in its entirety so that they can score better in the exam. 

IES 2023 Syllabus - Prelims

IES prelims exam is equally important for the candidates because the marks secured in it are also considered for the final merit. IES prelims exam is the first stage of the exam process. The list of topics for the UPSC ESE (IES) prelims exam is as follows:

General Studies and Engineering Aptitude Paper

Current issues of national and international importance relating to social, economic and industrial development

Basics of Energy and Environment: Conservation, environmental pollution and degradation, Climate Change, Environmental impact assessment

Engineering Aptitude covering Logical reasoning and Analytical ability

Basics of Project Management

Engineering Mathematics and Numerical Analysis

Basics of Material Science and Engineering

General Principles of Design, Drawing, Importance of Safety

Information and Communication Technologies (ICT) based tools and their applications in Engineering such as networking, e-governance and technology-based education.

Standards and Quality practices in production, construction, maintenance and services

Ethics and values in the engineering profession. 

The Commission has issued a common syllabus for the prelims and main exam (for each engineering branch). The candidates need to prepare all the topics given in the syllabus as that will help in the prelims and main exam. The candidates can see below the important engineering branch-wise syllabus.

IES 2023 Syllabus - Main Exam

The candidates should prepare the IES main exam thoroughly because it is a subjective exam where the candidates need to write answers in the 

IES Civil Engineering Syllabus 2023

The Commission prescribes the common syllabus for the prelims and main exam. The IES Civil Engineering syllabus is as follows:

IES Civil Engineering (Paper 1) Syllabus

The following are the details of topics and subtopics of the Civil Engineering Syllabus.

Topics Sub-Topics
Building Materials
  • Stone, Lime, Glass, Plastics, Steel, FRP, Ceramics, Aluminum, Fly Ash, Basic Admixtures, Timber, Bricks and Aggregates:
  • Classification, properties and selection criteria;
  • Cement: Types, Composition, Properties, Uses, Specifications and various Tests; Lime & Cement Mortars and Concrete:
  • Properties and various Tests; Design of Concrete Mixes: Proportioning of aggregates and methods of mix design.
Solid Mechanics
  • Elastic constants, Stress, plane stress, Strains, plane strain, Mohr’s circle of stress and strain, Elastic theories of failure, Principal Stresses, Bending, Shear and Torsion.
Structural Analysis
  • Basics of strength of materials, Types of stresses and strains, Bending moments and shear force, concept of bending and shear stresses;
  • Analysis of determinate and indeterminate structures;
  • Trusses, beams, plane frames;
  • Rolling loads, Influence Lines, Unit load method & other methods;
  • Free and Forced vibrations of single degree and multi degree freedom system;
  • Suspended Cables; Concepts and use of Computer Aided Design
Design of Steel Structures Principles of Working Stress methods, Design of tension and compression members, Design of beams and beam column
connections, built-up sections, Girders, Industrial roofs, Principles of Ultimate load design.
Design of Concrete and Masonry structures
  • Limit state design for bending, shear, axial compression and combined forces; Design of beams, Slabs, Lintels,
    Foundations, Retaining walls, Tanks, Staircases;
  • Principles of pre-stressed concrete design including materials and
  • Earthquake resistant design of structures;
  • Design of Masonry Structure.
Construction Practice, Planning and Management
  • Construction - Planning, Equipment, Site investigation and Management including Estimation with latest project
    management tools and network analysis for different Types of works;
  • Analysis of Rates of various types of works;
  • Tendering Process and Contract Management, Quality Control, Productivity, Operation Cost;
  • Land acquisition;
  • Labour safety and welfare

The above topics is list of topics as mentioned in the official notification.

IES Civil Engineering (Paper 2) Syllabus

The following topics are given for the Civil Engineering Paper 2

Topics Sub-Topics
Flow of Fluids, Hydraulic Machines and Hydro Power

(a) Fluid Mechanics, Open Channel Flow, Pipe Flow:

  • Fluid properties; Dimensional Analysis and Modeling;
  • Fluid dynamics including flow kinematics and measurements; Flow net;
  • Viscosity, Boundary layer and control, Drag, Lift, Principles in open channel flow, Flow controls. Hydraulic jump;
  • Surges;
  • Pipe networks.

(b) Hydraulic Machines and Hydro power -

  • Various pumps, Air vessels, Hydraulic turbines – types, classifications & performance parameters;
  • Power house – classification and layout, storage, pondage, control of supply.
Hydrology and Water Resources Engineering
  • Hydrological cycle, Ground water hydrology, Well hydrology and related data analysis;
  • Streams and their gauging;
  • River morphology;
  • Flood, drought and their management; Capacity of Reservoirs. 
  • Water Resources Engineering: Multipurpose uses of Water, River basins and their potential; Irrigation systems, water
    demand assessment; Resources - storages and their yields;
  • Water logging, canal and drainage design, Gravity dams, falls, weirs, Energy dissipaters, barrage Distribution works, Cross drainage works and head-works and their design;
  • Concepts in canal design, construction & maintenance;
  • River training, measurement and analysis of rainfall.
Environmental Engineering

(a) Water Supply Engineering:

  • Sources, Estimation, quality standards and testing of water and their treatment;
  • Rural, Institutional and industrial water supply;
  • Physical, chemical and biological characteristics and sources of water, Pollutants in water and its effects, Estimation of water demand;
  • Drinking water Standards, Water Treatment Plants, Water distribution networks.

(b) Waste Water Engineering:

  • Planning & design of domestic waste water, sewage collection and disposal; Plumbing Systems. Components and layout
    of sewerage system;
  • Planning & design of Domestic Waste-water disposal system;
  • Sludge management including treatment, disposal and re-use of treated effluents; Industrial waste waters and Effluent Treatment Plants including institutional and industrial sewage management.

(c) Solid Waste Management:

  • Sources & classification of solid wastes along with planning & design of its management system;
  • Disposal system,
  • Beneficial aspects of wastes and Utilization by Civil Engineers.

(d) Air, Noise pollution and Ecology:

  • Concepts & general methodology.
Geo-technical Engineering and Foundation Engineering

(a) Geo-technical Engineering:

Soil exploration - planning & methods, Properties of soil, classification, various tests and inter- relationships; Permeability & Seepage, Compressibility, consolidation and Shearing resistance, Earth pressure theories and stress distribution in soil; Properties and uses of geo-synthetics.

(b) Foundation Engineering:

Types of foundations & selection criteria, bearing capacity, settlement analysis, design and testing of shallow & deep foundations; Slope stability analysis, Earthen embankments, Dams and Earth retaining structures: types, analysis and design, Principles of ground modifications

Surveying and Geology

(a) Surveying:

Classification of surveys, various methodologies, instruments & analysis of measurement of distances, elevation and directions; Field astronomy, Global Positioning System; Map preparation; Photogrammetry; Remote sensing concepts; Survey Layout for culverts, canals, bridges, road/railway alignment and buildings, Setting out of Curves.

(b) Geology:

Basic knowledge of Engineering geology & its application in projects

Transportation Engineering
  • Highways - Planning & construction methodology, Alignment and geometric design; Traffic Surveys and Controls;
  • Principles of Flexible and Rigid pavements design.
  • Tunneling - Alignment, methods of construction, disposal of muck, drainage, lighting and ventilation.
  • Railways Systems – Terminology, Planning, designs and maintenance practices; track modernization.
  • Harbours – Terminology, layouts and planning.
  • Airports – Layout, planning & design.

The above list is exhaustive in nature as provided by the Commission.

IES Mechanical Engineering Syllabus 2023

The Commission releases a combined syllabus for all the Engineering streams for prelims and main exam. The candidates can see here the combined syllabus for prelims and main exam.

IES Mechanical Engineering (Paper 1) Syllabus

The candidates can see below the topics of UPSC ESE (IES) syllabus for Mechanical Engineering:



Fluid Mechanics

  • Basic Concepts and Properties of Fluids, Manometry, Fluid Statics, Buoyancy, Equations of Motion, Bernoulli’s equation and applications, Viscous flow of incompressible fluids, Laminar and Turbulent flows, Flow through pipes and head losses in pipes.
Thermodynamics and Heat transfer

  • Thermodynamic systems and processes; properties of pure substance; Zeroth, First and Second Laws of Thermodynamics;
  • Entropy, Irreversibility and availability; analysis of thermodynamic cycles related to energy conversion: Rankine, Otto, Diesel and Dual Cycles; ideal and real gases; compressibility factor; Gas mixtures.
  • Modes of heat transfer, Steady and unsteady heat conduction, Thermal resistance, Fins, Free and forced convection,
    Correlations for convective heat transfer, Radiative heat transfer – Radiation heat transfer co-efficient; boiling and
    condensation, Heat exchanger performance analysis.
IC Engines, Refrigeration and Air conditioning
  • SI and CI Engines, Engine Systems and Components, Performance characteristics and testing of IC Engines; Fuels; Emissions and Emission Control.
  • Vapour compression refrigeration, Refrigerants and Working cycles, Compressors, Condensers, Evaporators and Expansion devices, Other types of refrigeration systems like Vapour Absorption, Vapour jet, thermo electric and Vortex tube refrigeration.
  • Psychometric properties and processes, Comfort chart, Comfort and industrial air conditioning, Load calculations and Heat pumps.
Turbo Machinery
  • Reciprocating and Rotary pumps, Pelton wheel, Kaplan and Francis Turbines, velocity diagrams, Impulse and Reaction principles, Steam and Gas Turbines, Theory of Jet Propulsion – Pulse jet and Ram Jet Engines,
  • Reciprocating and Rotary Compressors – Theory and Applications
Power Plant Engineering
  • Rankine and Brayton cycles with regeneration and reheat, Fuels and their properties, Flue gas analysis, Boilers, steam turbines and other power plant components like condensers, air ejectors, electrostatic precipitators and cooling towers – their theory and design, types and applications;
Renewable Sources of Energy
  • Solar Radiation, Solar Thermal Energy collection - Flat Plate and focusing collectors their materials and performance.
  • Solar Thermal Energy Storage, Applications – heating, cooling and Power Generation;
  • Solar Photovoltaic Conversion;
  • Harnessing of Wind Energy, Bio-mass and Tidal Energy – Methods and Applications, Working principles of Fuel Cells.

IES Mechanical Engineering (Paper 2) Syllabus

The Mechanical Engineering Paper 2 syllabus as given in the official notification is given below:

Topics Sub-Topics
Engineering Mechanics
  • Analysis of System of Forces, Friction, Centroid and Centre of Gravity, Dynamics; Stresses and Strains-Compound Stresses and Strains, Bending Moment and Shear Force Diagrams, Theory of Bending Stresses- Slope and deflection-Torsion, Thin and thick Cylinders, Spheres.
Engineering Materials
  • Basic Crystallography, Alloys and Phase diagrams, Heat Treatment, Ferrous and Non-Ferrous Metals, Non-metallic materials, Basics of Nano-materials, Mechanical Properties and Testing, Corrosion prevention and control
Mechanisms and Machines
  • Types of Kinematics Pair, Mobility, Inversions, Kinematic Analysis, Velocity and Acceleration Analysis of Planar Mechanisms, CAMs with uniform acceleration and retardation, cycloidal motion, oscillating followers;
  • Vibrations –Free and forced vibration of undamped and damped SDOF systems, Transmissibility Ratio, Vibration Isolation, Critical Speed of Shafts.
  • Gears – Geometry of tooth profiles, Law of gearing, Involute profile, Interference, Helical, Spiral and Worm Gears, Gear Trains- Simple, compound and Epicyclic;
  • Dynamic Analysis – Slider – crank mechanisms, turning moment computations, balancing of Revolving & Reciprocating masses, Gyroscopes –Effect of Gyroscopic couple on automobiles, ships and aircrafts, Governors.
Design of Machine Elements
  • Design for static and dynamic loading;
  • failure theories;
  • fatigue strength and the S-N diagram;
  • Principles of the design of machine elements such as riveted, welded and bolted joints.
  • Shafts, Spur gears, rolling and sliding contact bearings, Brakes and clutches, flywheels.
Manufacturing, Industrial and Maintenance Engineering
  • Metal casting-Metal forming, Metal Joining, Machining and machine tool operations, Limits, fits and tolerances, Metrology and inspection, computer Integrated manufacturing, FMS, Production planning and Control, Inventory control and operations research - CPM-PERT.
  • Failure concepts and characteristics-Reliability, Failure analysis, Machine Vibration, Data acquisition, Fault Detection, Vibration Monitoring, Field Balancing of Rotors, Noise Monitoring, Wear and Debris Analysis, Signature Analysis, NDT Techniques in Condition Monitoring.
Mechatronics and Robotics
  • Microprocessors and Microcontrollers:  Architecture, programming, I/O, Computer interfacing, Programmable logic controller.
  • Sensors and actuators, Piezoelectric accelerometer, Hall effect sensor, Optical Encoder, Resolver, Inductosyn, Pneumatic and Hydraulic actuators, stepper motor, Control Systems- Mathematical modeling of Physical systems, control signals, controllability and observability.
  • Robotics, Robot Classification, Robot Specification, notation; Direct and Inverse Kinematics;
  • Homogeneous Coordinates and Arm Equation of four Axis SCARA Robot.

The above list is exhaustive in nature.

IES Electrical Engineering Syllabus 2023

The candidates can see below the combined syllabus for prelims and main exam. 

IES Electrical Engineering (Paper 1) Syllabus

UPSC mentioned all the topics of Electrical Engineering in the ESE (IES) 2023 notification. The list of topics and subtopics is given below:

Topics Subtopics
Engineering Mathematics
  • Matrix theory, Eigen values & Eigen vectors, system of linear equations, Numerical methods for solution of non-linear algebraic equations and differential equations, integral calculus, partial derivatives, maxima and minima, Line, Surface and Volume Integrals.
  • Fourier series, linear, non-linear and partial differential equations, initial and boundary value problems, complex variables, Taylor’s and Laurent’s series, residue theorem, probability and statistics fundamentals, Sampling theorem, random variables, Normal and Poisson distributions, correlation and regression analysis.
Electrical Materials
  • Electrical Engineering Materials, crystal structures and defects, ceramic materials, insulating materials, magnetic materials – basics, properties and applications; ferrities, ferro-magnetic materials and components; basics of solid state physics, conductors; Photo-conductivity; Basics of Nano materials and Superconductors.
Electric Circuits and Fields
  • Circuit elements, network graph, KCL, KVL, Node and Mesh analysis, ideal current and voltage sources, Thevenin’s,
    Norton’s, Superposition and Maximum Power Transfer theorems, transient response of DC and AC networks, Sinusoidal
    steady state analysis, basic filter concepts, two-port networks, three phase circuits, Magnetically coupled circuits, Gauss
    Theorem, electric field and potential due to point, line, plane and spherical charge distributions, Ampere’s and Biot-Savart’s laws; inductance, dielectrics, capacitance; Maxwell’s equations.
Electrical and Electronic Measurements
  • Principles of measurement, accuracy, precision and standards; Bridges and potentiometers; moving coil, moving iron, dynamometer and induction type instruments, measurement of voltage, current, power, energy and power factor, instrument transformers, digital voltmeters and multi-meters, phase, time and frequency measurement, Q-meters, oscilloscopes, potentiometric recorders, error analysis, Basics of sensors, Transducers, basics of data acquisition systems
Computer Fundamentals Number systems, Boolean algebra, arithmetic functions, Basic Architecture, Central Processing Unit, I/O and Memory
Organisation; peripheral devices, data represenation and programming, basics of Operating system and networking, virtual
memory, file systems; Elements of programming languages, typical examples.
Basic Electronics Engineering Basics of Semiconductor diodes and transistors and characteristics, Junction and field effect transistors (BJT, FET and
MOSFETS), different types of transistor amplifiers, equivalent circuits and frequency response; oscillators and other
circuits, feedback amplifiers

IES Electrical Engineering (Paper 2) Syllabus

UPSC mentions the list of topics in the official syllabus as below:

Topics Subtopics
Analog and Digital Electronics
  • Operational amplifiers – characteristics and applications, combinational and sequential logic circuits, multiplexers, multi-vibrators, sample and hold circuits, A/D and D/A  converters, basics of filter circuits and applications, simple active filters;
  • Microprocessor basics- interfaces and applications, basics of linear integrated circuits;
  • Analog communication basics, Modulation and de-modulation, noise and bandwidth, transmitters and receivers, signal to noise ratio, digital communication basics, sampling, quantizing, coding, frequency and time domain multiplexing, power line carrier communication systems.
Systems and Signal Processing
  • Representation of continuous and discrete-time signals, shifting and scaling operations, linear, time-invariant and causal systems, Fourier series representation of continuous periodic signals, sampling theorem, Fourier and Laplace transforms, Z transforms, Discrete Fourier transform, FFT, linear convolution, discrete cosine transform, FIR filter, IIR filter, bilinear transformation.
Control Systems
  • Principles of feedback, transfer function, block diagrams and signal flow graphs, steady-state errors, transforms and their applications; Routh-hurwitz criterion, Nyquist techniques, Bode plots, root loci, lag, lead and lead-lag compensation, stability analysis, transient and frequency response analysis, state space model, state transition matrix, controllability and observability, linear state variable feedback, PID and industrial controllers
Electrical Machines
  • Single phase transformers, three-phase transformers - connections, parallel operation, auto-transformer, energy conversion principles, DC machines - types, windings, generator characteristics, armature reaction and commutation, starting and speed control of motors, Induction motors - principles, types, performance characteristics, starting and speed control, Synchronous machines - performance, regulation, parallel operation of generators, motor starting, characteristics and applications, servo and stepper motors.
Power Systems Basic power generation concepts, steam, gas and water turbines, transmission line models and performance, cable
performance, insulation, corona and radio interference, power factor correction, symmetrical components, fault analysis,
principles of protection systems, basics of solid state relays and digital protection; Circuit breakers, Radial and ring-main
distribution systems, Matrix representation of power systems, load flow analysis, voltage control and economic operation,
System stability concepts, Swing curves and equal area criterion. HVDC transmission and FACTS concepts, Concepts of
power system dynamics, distributed generation, solar and wind power, smart grid concepts, environmental implications,
fundamentals of power economics.
Power Electronics and Drives Semiconductor power diodes, transistors, thyristors, triacs, GTOs, MOSFETs and IGBTs - static characteristics and principles of operation, triggering circuits, phase control rectifiers, bridge converters - fully controlled and half controlled, principles of choppers and inverters, basis concepts of adjustable speed DC and AC drives, DC-DC switched mode  converters, DC-AC switched mode converters, resonant converters, high frequency inductors and transformers, power supplies.

IES Electronics & Telecommunication Engineering Syllabus 2023

IES Syllabus for Electronics and Telecommunication Engineering is given below:

IES Electronics & Telecommunication Engineering (Paper 1) Syllabus

The candidates can see below list of topics and subtopics for Electronics & Telecommunication Engineering 



Basic Electronics Engineering
  • Basics of semiconductors;
  • Diode/Transistor basics and characteristics;
  • Diodes for different uses;
  • Junction & Field Effect Transistors (BJTs, JFETs, MOSFETs);
  • Transistor amplifiers of different types, oscillators and other circuits; Basics of Integrated Circuits (ICs);
  • Bipolar, MOS and CMOS ICs; Basics of linear ICs, operational amplifiers and their applications-linear/non-linear;
  • Optical sources/detectors;
  • Basics of Optoelectronics and its applications
Basic Electrical Engineering
  • DC circuits-Ohm’s & Kirchoff’s laws, mesh and nodal analysis, circuit theorems;
  • Electro-magnetism, Faraday’s & Lenz’s
    laws, induced EMF and its uses;
  • Single-phase AC circuits;
  • Transformers, efficiency;
  • Basics-DC machines, induction machines, and synchronous machines; Electrical power sources- basics: hydroelectric, thermal, nuclear, wind, solar;
  • Basics of batteries and their uses.
Materials Science
  • Electrical Engineering materials;
  • Crystal structure & defects;
  • Ceramic materials-structures, composites, processing and uses;
  • Insulating laminates for electronics, structures, properties and uses;
  • Magnetic materials, basics, classification, ferrites, ferro/para-magnetic materials and components;
  • Nano materials-basics, preparation, purification, sintering, nano particles and uses;
  • Nano-optical/magnetic/electronic materials and uses;
  • Superconductivity, uses.
Electronic Measurements and Instrumentation
  • Principles of measurement, accuracy, precision and standards;
  • Analog and Digital systems for measurement, measuring instruments for different applications; Static/dynamic characteristics of measurement systems, errors, statistical analysis and curve fitting;
  • Measurement systems for non-electrical quantities;
  • Basics of telemetry; Different types of transducers and displays; Data acquisition system basics.
Network Theory
  • Network graphs & matrices;
  • Wye-Delta transformation;
  • Linear constant coefficient differential equations- time domain analysis of RLC circuits;
  • Solution of network equations using Laplace transforms- frequency domain analysis of RLC circuits; 2-port network parameters-driving point & transfer functions; State equations for networks; Steady state sinusoidal analysis.
Analog and Digital Circuits
  • Small signal equivalent circuits of diodes, BJTS and FETs;
  • Diode circuits for different uses;
  • Biasing & stability of BJT & JFET amplifier circuits;
  • Analysis/design of amplifier- single/multi-stage; Feedback& uses; Active filters, timers, multipliers, wave shaping, A/D-D/A converters;
  • Boolean Algebra& uses;
  • Logic gates, Digital IC families, Combinatorial/sequential circuits;
  • Basics of multiplexers, counters/registers/ memories /microprocessors, design& applications

The above list includes all the topics as mentioned in the official notification

IES Electronics & Telecommunication Engineering (Paper 2) Syllabus

The UPSC IES Electronics and Telecommunication Engineering syllabus is summarised below:

Topics Subtopics
Analog and Digital Communication Systems
  • Random signals, noise, probability theory, information theory; Analog versus digital communication & applications:
  • Systems- AM, FM, transmitters/receivers, theory/practice/ standards, SNR comparison;
  • Digital communication basics:
  • Sampling, quantizing, coding, PCM, DPCM, multiplexing-audio/video; Digital modulation:
  • ASK, FSK, PSK; Multiple access:
  • TDMA, FDMA, CDMA; Optical communication: fibre optics, theory, practice/standards.
Control Systems
  • Classification of signals and systems;
  • Application of signal and system theory;
  • System realization; Transforms& their applications;
  • Signal flow graphs, Routh-Hurwitz criteria, root loci, Nyquist/Bode plots;
  • Feedback systems-open &close loop types, stability analysis, steady state, transient and frequency response analysis;
  • Design of control systems, compensators, elements of lead/lag compensation, PID and industrial controllers
Computer Organization and Architecture
  • Basic architecture, CPU, I/O organisation, memory organisation, peripheral devices, trends;
  • Hardware /software issues;
  • Data representation& Programming;
  • Operating systems-basics, processes, characteristics, applications; Memory management, virtual memory, file systems, protection & security;
  • Data bases, different types, characteristics and design;
  • Transactions and concurrency control; Elements of programming languages, typical examples.
Electro Magnetics
  • Elements of vector calculus, Maxwell’s equations-basic concepts; Gauss’, Stokes’ theorems; Wave propagation through different media;
  • Transmission Lines-different types, basics, Smith’s chart, impedance matching/transformation, S-parameters, pulse excitation, uses;
  • Waveguides-basics, rectangular types, modes, cut-off frequency, dispersion, dielectric types;
  • Antennas-radiation pattern, monopoles/dipoles, gain, arrays-active/passive, theory, uses.
Advanced Electronics Topics
  • VLSI technology: Processing, lithography, interconnects, packaging, testing;
  • VLSI design: Principles, MUX/ROM/PLA-based design, Moore & Mealy circuit design;
  • Pipeline concepts & functions;
  • Design for testability, examples; DSP: Discrete time signals/systems, uses;
  • Digital filters: FIR/IIR types, design, speech/audio/radar signal processing uses;
  • Microprocessors & microcontrollers, basics, interrupts, DMA, instruction sets, interfacing;
  • Controllers & uses; Embedded systems.
Advanced Communication Topics
  • Communication networks: Principles /practices /technologies /uses /OSI model/security;
  • Basic packet multiplexed streams/scheduling;
  • Cellular networks, types, analysis, protocols (TCP/TCPIP); Microwave & satellite communication: Terrestrial/space type LOS systems, block schematics link calculations, system design;
  • Communication satellites, orbits, characteristics, systems, uses; Fibre-optic communication systems, block schematics, link calculations, system design.

The number of candidates to be admitted to the Main/Stage-II Examination will be about six to seven times the total approximate number of vacancies to be filled in the year through this


IES Syllabus 2023 FAQs

Q: Is IES harder than IAS?

A: The IES exam is a specialist service exam where the UPSC ask the engineering subjects. The candidates selected through IES exam are appointed as the Executive Engineers in different Central departments. The IES exam is at another level becaue IAS is the generalist service exam. The Commisison ask the general studies questions from the candidates and the selected candidates are appoited to the All-India Service (IAS, IPS) and Central Civil Services. The IAS exam is far tougher then the IES exam because of the syllabus and the number of candidates appearing in the exam.

Q: Was there any change in the UPSC ESE (IES) 2023 syllabus?

A: No, the UPSC ESE(IES) 2023 syllabus was not changed from last year. The candidates can see here all the details regarding the syllabus. The Commission released the IES syllabus with the official notification. The candidates need to read and prepare all the topics mentioned in the IES syllabus. The candidates need to prepare all the topics because the Commission do not mention any weightage for the topics.

Q: Is IES difficult exam?

A: This is a very subjective question. For an average candidates, the UPSC ESE (IES) exam is a hard nut to crack. The exam requires a dedicated preparation of over one year to qualify the exam. It is the competition among the same group of engineering graduates. 

Q: Is IES equal to IAS?

A: No, IES is not equivalent to IAS. IES is a specialised job, but the IAS is a generalist job. IAS is better in all respect. In the Governent hierarchy, the specialised agencies are attached to the head quarters as directorate which is headed by Director. The candidates selected in the IES can go upto the director post. The post above the directors are available to very few candidates becuse some candidates join IES in early age and they have amp.yle time to become a part of Ministr

Q: Which branch is best for IES?

A: All the branches are equal in the UPSC ESE (IES) exam. The candidates need to appear and clear all the phases of exam to get selected finally. The highest number of vacancies are notified under the Civil and Mechanical branch. The four branches in the IES 2023are mentioned below:
  • Civil Engineering
  • Mechanical Engineering
  • Electrical Engineering
  • Electronics and Telecommunication Engineering

Q: How many attempts are allowed for IES?

A: There is no limit for the number of attempts in the IES exam. The candidates can apply for the IES exam every year till they fulfil the upper age criteria. The IES age limit is defined in the official notification. The candidates can see here the IES age limit summarised as below:
  • Lower Age Limit - 21 years
  • Upper Age Limit - 30 years

Q: Is IES tougher than GATE?

A:  IES and GATE are two different competitive examinations in India. IES (Indian Engineering Services) is a competitive examination conducted by the Union Public Service Commission (UPSC) for recruitment to the engineering positions in the Indian government. It is considered one of the toughest examinations in India and offers a career in the fields of civil, mechanical, electrical and electronics, and telecommunications engineering.
GATE (Graduate Aptitude Test in Engineering) is an examination conducted by the Indian Institute of Science (IISc) and the seven Indian Institutes of Technology (IITs) for admission to postgraduate engineering programs (e.g. M.E., M.Tech, Ph.D.) in Indian institutes of higher education. It is also a qualifying examination for various government scholarships and jobs in the public sector.
We cannot make comment an any above questions. Both have a little diffeent syllabus and career path.

Q: What are the subjects for IES?

A: The Commission conduct the exam to recruit candidates for the position of IES. The candidates can see below the four Engineering streams for which the exam was notified. The names of the service are given below:
  • Civil Engineering
  • Mechanical Engineering
  • Electrical Engineering
  • Electronics and Telecommunication Engineering

Q: What is IES exam process?

A: The candidates can see below some of the most important points regarding the IES exam.
  • The IES exam is conducted by the Union Public Service Commission (UPSC) in India.
  • The exam is typically held in the month of February every year.
  • The exam is open to candidates who hold a degree in engineering from a recognized university.
  • The exam consists of a written test, followed by an interview.
  • The written test includes two papers: a general studies and engineering aptitude paper and an engineering discipline-specific paper.

Q: What is the Cutoff for IES 2022 Prelims?

A: The Commission releases the IES cutoff with the final resul. In the IES result, the Commission mention the roll number of the qualified candidates. The candidates are required to score equal to or more than their category cutoff to ensure there selection in the exam. 

Q: Which subject has the largest syllabus in the IES 2023 exam?

A: The candidates should understand that the Commission notifies the syllabus for all Engineerign streams in the official IES notification. The candidates having affinity to one subject can find the sllabys interesting or fema.

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The Union Public Service Commission (UPSC) released IES 2024 notification on September 6, 2023. The Commission released the IES 2024 notification online only. The Commission also activated the IES 2024 applications with the release of official notification. The last date to apply for the IES 2024 e


Rachit Kumar Saxena

Contributor-Level 10

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