IGNOU MCA 4th Semester Most Repeated Questions
Curated List of Questions that are repeated frequently in the examinations.
- Last Updated on April 28, 2026
Table of Contents
Here You Will Get The 30 Most Repeated Questions for IGNOU MCA 4th Semester.
In this post, we’ve compiled 30 high-frequency questions from MCS-230, MCS-231 after analyzing previous year papers. This helps you concentrate only on the most important topics.
IGNOU often repeats key questions across term-end exams, making it a smart strategy for scoring better with less effort.
By practicing these questions, you can:
Score Good in Examinations
Identify scoring topics
Save time with focused study
MCS-230
1 . What is the role of sampling and quantization in the process of image digitization?
Found in Dec 2022 ( 2 a ), June 2023 ( 2 a ), Dec 2023 ( 2 a ), June 2024 ( 1 b )
2 . Given a gray scale image with an aspect ratio and specific pixel resolution, calculate the dimensions and size of the image.
Found in Dec 2023 ( 2 b ), June 2024 ( 2 a ), Dec 2022 ( 3 b )
3 . Determine the number of samples required to preserve information in an image given its physical dimensions and frequency (dots per inch).
Found in June 2023 ( 2 b ), Dec 2024 ( 1 b ), Dec 2022 ( 3 b )
4 . Differentiate between direct imaging systems and indirect imaging systems.
Found in Dec 2023 ( 1 a ), Dec 2024 ( 1 a ), June 2023 ( 1 a – via comparison ), June 2024 ( 1 a – via comparison )
5 . Discuss the basic properties and utility of the Linear Discriminant Function.
Found in Dec 2022 ( 1 e ), June 2023 ( 4 a ), Dec 2024 ( 1 g )
6 . Explain Discrete Fourier Transform (DFT) and discuss its properties.
Found in Dec 2022 ( 1 c ), Dec 2023 ( 3 a ), June 2024 ( 1 e )
7 . Compare image enhancement with image restoration and explain the term “image degradation.”
Found in Dec 2022 ( 1 d ), June 2023 ( 3 b ), June 2024 ( 3 b )
8 . Explain the types of noises based on their probability distributions (such as Gaussian, Rayleigh, and Salt & Pepper).
Found in Dec 2022 ( 5 e ), June 2023 ( 5 e ), Dec 2023 ( 5 e, 5 f ), June 2024 ( 4 a ), Dec 2024 ( 4 a )
9 . Describe the quantities used to represent any colour, specifically Hue, Saturation, and Intensity (or Brightness and Contrast).
Found in Dec 2022 ( 5 c, 2 c, 5 a ), June 2023 ( 4 c ), Dec 2023 ( 4 c )
10 . Discuss the various categories of frequency domain filters, including low-pass and high-pass filters.
Found in Dec 2022 ( 5 d ), June 2023 ( 1 d, 5 d ), Dec 2023 ( 1 d, 5 d ), Dec 2024 ( 3 b )
11 . Differentiate between supervised and unsupervised learning techniques/approaches.
Found in Dec 2023 ( 1 e ), June 2024 ( 1 h ), June 2023 ( 1 e – via Bayes classifier discussion )
12 . Explain Hierarchical Clustering, including Agglomerative and Divisive methods.
Found in Dec 2022 ( 4 b ), Dec 2023 ( 4 b ), Dec 2024 ( 5 a )
13 . Discuss single-link and complete-link type of agglomerative clustering with suitable examples.
Found in Dec 2023 ( 4 b ), Dec 2024 ( 5 a ), June 2023 ( 4 b – via partition-based clustering context )
14 . Explain Bayes’ theorem and discuss its properties/role in the Bayes classifier.
Found in June 2023 ( 1 e ), June 2024 ( 1 g ), Dec 2022 ( 4 a – via Bayesian equivalence )
15 . Differentiate between image smoothing filters and image sharpening filters.
Found in Dec 2022 ( 4 b ), June 2023 ( 1 d ), Dec 2024 ( 2 b )
16 . Explain the RGB color model and how it is used to represent color.
Found in Dec 2022 ( 4 c ), Dec 2024 ( 1 f, 4 b ), June 2024 ( 4 b )
17 . Explain the different types of resolution used in digital images, such as pixel, intensity, and spatial resolution.
Found in Dec 2022 ( 5 c ), June 2023 ( 5 c ), Dec 2023 ( 5 c )
18 . Specify the objectives of image enhancement techniques and explain their types.
Found in June 2023 ( 2 c ), June 2024 ( 1 c ), Dec 2024 ( 1 c )
19 . Write short notes on Mean filters and Median filters.
Found in Dec 2022 ( 5 f ), Dec 2023 ( 5 f ), June 2024 ( 1 f – via inverse filtering context )
20 . Explain how to transform an image from the spatial domain to the frequency domain and its importance.
Found in June 2023 ( 1 b ), Dec 2023 ( 1 d ), Dec 2022 ( 4 b )
21 . Explain the term “Image Acquisition” and compare optical, analog, and digital image processing.
Found in June 2023 ( 1 a ), June 2024 ( 1 a ), Dec 2022 ( 1 a )
22 . Discuss the role of Gaussian Low Pass filters in image processing.
Found in Dec 2022 ( 5 d ), Dec 2023 ( 5 d ), June 2023 ( 5 d )
23 . Compare Continuous Wavelet Transform (CWT) and Discrete Wavelet Transform (DWT).
Found in Dec 2023 ( 1 c ), Dec 2024 ( 1 e ), June 2023 ( 3 a – via comparison )
24 . Explain the K-means clustering algorithm with a suitable example.
Found in June 2023 ( 4 b ), June 2024 ( 5 a ), Dec 2023 ( 1 e – via taxonomy )
25 . Construct or compute a transformation matrix of Order 2 (such as DFT, DCT, or Haar).
Found in Dec 2022 ( 1 c, 3 a ), June 2023 ( 1 c ), Dec 2024 ( 1 d )
26 . Differentiate between Hierarchical and Non-Hierarchical clustering methods.
Found in Dec 2022 ( 4 b ), Dec 2023 ( 1 e – via taxonomy ), June 2024 ( 5 a – via K-means vs others )
27 . Discuss Rayleigh noise and provide its characteristics.
Found in Dec 2023 ( 5 f ), June 2024 ( 4 a ), Dec 2024 ( 4 a )
28 . Explain the properties and importance of Gaussian noise in image restoration.
Found in June 2023 ( 5 e ), June 2024 ( 4 a ), Dec 2022 ( 5 e )
29 . Explain the term “Image Digitization” including the roles of sampling and quantization.
Found in June 2023 ( 2 a ), Dec 2023 ( 1 a ), June 2024 ( 1 b ), Dec 2022 ( 2 a )
30 . Differentiate between Analog Image and Digital Image and mention frequently used image file formats.
ound in Dec 2022 ( 1 a ), June 2023 ( 1 a ), June 2024 ( 1 a )
MCS-231
1 . What is GPRS? Explain its features.
Found in Dec 2022 ( 1 b ) , June 2024 ( 5 a ) , Dec 2024 ( 1 b )
2 . Describe the services offered by GPRS.
Found in Dec 2022 ( 1 b ) , Dec 2024 ( 1 b )
3 . Explain the features of XML.
Found in Dec 2022 ( 5 b ) , Dec 2023 ( 2 b )
4 . Write a short note on XML.
Found in Dec 2022 ( 5 b ) , Dec 2023 ( 2 b )
5 . What is a Cellular Network?
Found in Dec 2022 ( 2 a ) , Dec 2023 ( 1 b )
6 . Explain the various components of a cellular network.
Found in Dec 2022 ( 2 a ) , Dec 2023 ( 1 b )
7 . Explain mobile computing architecture with the help of a diagram.
Found in Dec 2022 ( 2 b ) , Dec 2024 ( 2 a )
8 . Draw a neat diagram for mobile computing architecture.
Found in Dec 2022 ( 2 b ) , Dec 2024 ( 2 a )
9 . Explain J2EE architecture.
Found in Dec 2022 ( 3 b ) , June 2024 ( 3 a )
10 . Explain the features of an integrated development platform for mobile apps.
Found in Dec 2022 ( 4 b ) , Dec 2023 ( 4 a )
11 . Explain the features of iOS.
Found in Dec 2022 ( 5 a ) , June 2024 ( 4 a )
12 . Explain the architecture of iOS.
Found in Dec 2022 ( 5 a ) , June 2024 ( 4 a )
13 . What is Time Division Multiplexing (TDM)?
Found in June 2023 ( 1 a ) , Dec 2023 ( 1 a )
14 . What are the advantages, disadvantages and applications of TDM?
Found in June 2023 ( 1 a ) , Dec 2023 ( 1 a )
15 . Explain various components of J2ME.
Found in June 2023 ( 3 b ) , Dec 2023 ( 3 a )
16 . What is J2ME?
Found in June 2023 ( 3 b ) , Dec 2023 ( 3 a )
17 . Draw and explain Android architecture.
Found in June 2023 ( 3 a ) , Dec 2023 ( 3 b )
18 . Write a short note on Android.
Found in June 2023 ( 3 a ) , Dec 2023 ( 3 b )
19 . Write a short note on the Adhoc Networks.
Found in Dec 2022 ( 1 d ) , June 2024 ( 5 b )
20 . What are adhoc networks? Explain their advantages.
Found in Dec 2022 ( 1 d ) , June 2024 ( 5 b )
21 . List various steps in the development of a Mobile App.
Found in Dec 2023 ( 2 a ) , June 2024 ( 4 b )
22 . Explain various phases of development process of a mobile application.
Found in Dec 2023 ( 2 a ) , June 2024 ( 4 b )
23 . Write a short note on Mobile Device Database Management.
Found in Dec 2023 ( 1 d ) , June 2024 ( 1 d ) , Dec 2024 ( 3 b )
24 . Explain the architecture patterns for mobile device data store methods.
Found in Dec 2023 ( 1 d ) , June 2024 ( 1 d ) , Dec 2024 ( 3 b )
25 . Explain Mobile Device Data Store methods.
Found in Dec 2023 ( 1 d ) , June 2024 ( 1 d ) , Dec 2024 ( 3 b )
26 . Explain any five features of Mobile Communications / Computing.
Found in Dec 2023 ( 4 b ) , Dec 2024 ( 1 a )
27 . What is GSM technology?
Found in June 2023 ( 1 b ) , Dec 2024 ( 1 d )
28 . Explain the features of GSM.
Found in June 2023 ( 1 b ) , Dec 2024 ( 1 d )
29 . What are the advantages and disadvantages of GSM?
Found in June 2023 ( 1 b ) , Dec 2024 ( 1 d )
30 . Explain frequency reuse in cellular networks.
Found in Dec 2022 ( 2 a ) , Dec 2023 ( 1 b )