Free Practice Questions for NEC Computer Engineering

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Exam Review

Key Facts: NEC Computer Engineering Exam

100 MCQs

Total Questions (1 mark each)

NEC exam procedure, 2082

2 hours

Exam Duration

NEC exam procedure, 2082

50%

Pass Mark

NEC exam procedure, 2082

NPR 2,500

Exam Fee (double if late)

NEC notice, 2083/05/16

10 Chapters

Syllabus Structure (10 questions each)

NEC ACtE syllabus

NPR 5,000

Registration Fee After Passing

NEC Regulations, 2057 (Rule 8)

Computer engineering graduates in Nepal must pass the Nepal Engineering Council registration exam before they can practise. The ACtE paper has 100 one-mark multiple-choice questions in 2 hours, 10 from each syllabus chapter, and the pass mark is 50%. The exam fee is NPR 2,500 (double in the late-application window), and passing candidates pay NPR 5,000 to be registered.

Sample NEC Computer Engineering Practice Questions

Try these sample questions to review concepts for the NEC Computer Engineering exam. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.

1A 12 V source with a 4 Ω series resistor feeds terminals A–B, and a 12 Ω resistor is connected across A–B. What is the Thevenin equivalent seen from A–B?

A.Vth = 9 V, Rth = 3 Ω

B.Vth = 12 V, Rth = 16 Ω

C.Vth = 9 V, Rth = 16 Ω

D.Vth = 3 V, Rth = 3 Ω

Explanation: The open-circuit voltage comes from the voltage divider: Vth = 12 × 12/(4 + 12) = 9 V. With the source shorted, the 4 Ω and 12 Ω resistors are in parallel as seen from A–B, so Rth = (4 × 12)/(4 + 12) = 3 Ω.

2At room temperature, what forward voltage (cut-in or knee voltage) is needed before a silicon p–n diode conducts appreciably?

A.0.1–0.2 V

B.0.2–0.3 V

C.1.1–1.2 V

D.0.6–0.7 V

Explanation: A silicon diode starts conducting significantly at about 0.6–0.7 V, which is why 0.7 V is used as the constant-drop model. Germanium diodes conduct at about 0.2–0.3 V.

3In which region must a BJT be biased to work as a linear small-signal amplifier?

A.Cutoff (both junctions reverse biased)

B.Saturation (both junctions forward biased)

C.Active (emitter–base forward, collector–base reverse biased)

D.Inverse active (emitter–base reverse, collector–base forward biased)

Explanation: In the active region, the forward-biased emitter–base junction injects carriers and the reverse-biased collector–base junction collects them. The collector current is then controlled by the base current (IC ≈ βIB), which gives linear amplification.

4How does an n-channel enhancement MOSFET differ from an n-channel depletion MOSFET in gate control?

A.The enhancement type conducts at VGS = 0, while the depletion type needs a positive VGS

B.Enhancement: off at VGS = 0, needs VGS > Vth; depletion: conducts at VGS = 0

C.A depletion MOSFET cannot be turned off by any gate voltage

D.An enhancement MOSFET needs a negative drain–source voltage to operate

Explanation: An enhancement MOSFET has no channel at VGS = 0, and a channel forms only when VGS exceeds the threshold voltage (normally off). A depletion MOSFET has a built-in channel and conducts at VGS = 0; a negative VGS depletes the channel and turns it off.

5An ideal op-amp inverting amplifier has R1 = 10 kΩ and Rf = 100 kΩ. What is its voltage gain Vout/Vin?

A.+10

B.−11

C.+11

D.−10

Explanation: With the inverting input at virtual ground, the gain is −Rf/R1 = −100/10 = −10. The minus sign means the output is 180° out of phase with the input.

6How is the common-mode rejection ratio (CMRR) of an op-amp defined, and what is its ideal value?

A.Ad/Acm; ideally infinite

B.Ad/Acm; ideally zero

C.Acm/Ad; ideally 1

D.Slew rate divided by offset voltage; ideally infinite

Explanation: CMRR is the ratio of differential gain to common-mode gain, |Ad/Acm|, often given in dB as 20 log|Ad/Acm|. An ideal op-amp rejects common-mode signals completely (Acm = 0), so its CMRR is infinite.

7What is the output frequency of a 555 timer in astable mode with timing resistors R1, R2 and capacitor C?

A.1.44 / [(R1 + R2)C]

B.0.693 / [(R1 + 2R2)C]

C.1.44 / [(R1 + 2R2)C]

D.1 / [2π(R1 + R2)C]

Explanation: The capacitor charges through R1 + R2 (thigh = 0.693(R1 + R2)C) and discharges through R2 only (tlow = 0.693R2C). The period is T = 0.693(R1 + 2R2)C, so f = 1/T ≈ 1.44/[(R1 + 2R2)C].

8A series RLC circuit has R = 10 Ω, L = 25 mH and C = 10 μF. What is its resonant frequency in hertz?

A.31.8 Hz

B.318.3 Hz

C.2000 Hz

D.636.6 Hz

Explanation: LC = 0.025 × 10 × 10⁻⁶ = 2.5 × 10⁻⁷ s², so √(LC) = 5 × 10⁻⁴ s. ω0 = 1/√(LC) = 2000 rad/s, and f0 = ω0/(2π) ≈ 318.3 Hz. R affects the sharpness of resonance, not its frequency.

9What is the main use of a Zener diode operated in its reverse breakdown region in a DC power supply?

A.Holding a nearly constant DC voltage as the load current varies

B.Generating high-frequency square waves

C.Rectifying high-voltage AC mains into DC in the forward direction

D.Removing common-mode noise from balanced lines

Explanation: In reverse breakdown, a Zener diode keeps an almost constant voltage across itself over a wide range of currents. Placed in shunt with a series resistor, it regulates the supply against changes in load and input.

10A bridge rectifier is fed from a 50 Hz transformer with a secondary peak voltage of 20 V. With ideal diodes, what are the ripple frequency and the peak inverse voltage (PIV) on each diode?

A.50 Hz ripple; PIV = 10 V

B.100 Hz ripple; PIV = 40 V

C.200 Hz ripple; PIV = 20 V

D.100 Hz ripple; PIV = 20 V

Explanation: A bridge rectifies both half-cycles, so the ripple frequency is twice the supply frequency, 100 Hz. In each half-cycle the two non-conducting diodes face the secondary peak, so each diode's PIV is Vm = 20 V.

About the NEC Computer Engineering Exam

The Nepal Engineering Council Registration Examination for computer engineering (syllabus code ACtE) is the mandatory professional licensure test for computer engineering graduates under the Nepal Engineering Council Act, 2055 (amended 2079). The 100-mark paper contains 100 objective questions covering electronic circuits, microprocessors, programming, computer architecture, networking, formal languages, operating systems, software engineering, AI, and project governance. This page offers independent practice by OpenExamPrep.

Exam sponsor: Nepal Engineering Council (NEC). The requirements and fees below concern the certification or admission exam, separate from our free practice resources.

Assessment

100 multiple-choice questions of 1 mark each (full marks 100) in 2 hours. Each of the 10 syllabus chapters contributes 10 questions, with at least one question from each of its 6 sub-chapters. The pass mark is 50%.

Time Limit

2 hours

Passing Score

50%

Exam / Certification Fees

NPR 2,500

Exam sponsor website

Fees, eligibility, and exam policies can change. Confirm them with the exam sponsor before applying or paying.

Official sources

Our practice resources: topics covered

We aim to reflect publicly available exam outlines and topic information in our study resources. Coverage, format, and difficulty may differ from the actual exam, and we cannot guarantee that every detail is accurate or current. Confirm exam requirements, fees, and policies with the official exam sponsor.

10%

Concept of Basic Electrical and Electronics Engineering

Circuit laws and network theorems, AC fundamentals, semiconductor devices (diodes, BJTs, MOSFETs), oscillators, amplifiers and op-amps.

10%

Digital Logic and Microprocessor

Number systems and Boolean algebra, combinational and sequential circuits, microprocessor architecture and assembly language, memory and I/O interfacing, DMA and interrupts.

10%

Programming Language and Its Applications

C programming (pointers, structures, files) and C++ object-oriented programming, inheritance, virtual functions, templates and exception handling.

10%

Computer Organization and Embedded System

CPU and control unit design, computer arithmetic and the memory hierarchy, I/O and multiprocessors, embedded system design, real-time operating systems and VHDL.

10%

Concept of Computer Network and Network Security System

OSI and TCP/IP models, data link protocols, IP addressing and routing, the transport layer, application protocols, cryptography and network security.

10%

Theory of Computation and Computer Graphics

Finite automata and regular expressions, context-free grammars and pushdown automata, Turing machines and complexity, graphics hardware, 2D and 3D transformations, clipping and projection.

10%

Data Structures and Algorithm, Database System and Operating System

Lists, stacks, queues and trees, sorting, searching and graphs, ER modelling, normalization and SQL, transactions, and OS process, memory and file management.

10%

Software Engineering and Object-Oriented Analysis & Design

Process models and requirements, software design and architecture, testing, estimation and quality management, and object-oriented analysis and design with UML.

10%

Artificial Intelligence and Neural Networks

Intelligent agents, search and game playing, knowledge representation and logic, expert systems and NLP, machine learning, and neural networks.

10%

Project Planning, Design and Implementation

Engineering drawing, engineering economics, project planning and scheduling (CPM/PERT), project management and tendering, professional practice, and the NEC Act and Regulations.

Preparing for the NEC Computer Engineering Exam

What You Need to Know

Passing score: 50%
Assessment: 100 multiple-choice questions of 1 mark each (full marks 100) in 2 hours. Each of the 10 syllabus chapters contributes 10 questions, with at least one question from each of its 6 sub-chapters. The pass mark is 50%.
Time limit: 2 hours
Exam / certification fees: NPR 2,500 Official sources

Using Our Practice Resources

Work through all 100 available questions
Review every answer and explanation
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NEC Computer Engineering: Suggested Study Strategy

1Review computer architecture calculations: cache address fields, Booth's multiplication and IEEE 754 formats.

2Practise dry-running algorithms such as tree traversals, quicksort partitions, page replacement and graph searches.

3Know digital logic conversions, K-map minimization, and 8085 addressing modes and interrupt vectors.

4Study Nepal's legal context for engineers, notably the Electronic Transactions Act, 2063, the Public Procurement Act, 2063 and the NEC Act and Regulations.

5Spread your preparation across all 10 chapters, since each chapter carries 10 marks.

Frequently Asked Questions

What is the format and passing score of the NEC Computer Engineering exam?

Under NEC's 2082 marking scheme, the paper has 100 multiple-choice questions worth 1 mark each (full marks 100), takes 2 hours and needs 50% to pass. It replaced the earlier mix of 60 one-mark and 20 two-mark questions. The official marking scheme does not mention negative marking.

How are questions distributed across the ACtE syllabus?

The ACtE syllabus has 10 chapters, each with 6 sub-chapters. NEC sets 10 questions from each chapter, including at least one from every sub-chapter, so each chapter carries 10% of the marks.

What are the exam and registration fees?

The exam fee is NPR 2,500, paid with the online application at register.nec.gov.np. Applications in the late window, up to seven days after the deadline, cost double. After passing, the NEC Regulations set a registration fee of NPR 5,000 for entry in the register as a general registered engineer.

Is the ACtE syllabus used for IT, software or electronics graduates?

No. ACtE is the computer engineering syllabus. NEC publishes separate registration syllabi for programmes such as information technology, software and electronics and communication engineering, and lists those faculties separately in its exam notices. Check the syllabus for your degree on nec.gov.np.

Who is eligible to take the NEC ACtE exam?

Applicants need a bachelor's degree in computer engineering from an institution recognized by the Nepal Engineering Council. The application includes certified copies of the degree and the Nepali citizenship certificate, plus an equivalence certificate where one is required.

In what language is the exam conducted?

The official ACtE syllabus and NEC's model questions are in English, and this practice bank is also in English.

Is this practice bank official?

No. These are independent practice questions by OpenExamPrep for studying the ACtE syllabus topics. They are not NEC questions, and NEC's notices on nec.gov.np remain the authority on exam dates, fees and rules.