Most 120+ Computer Interview Question For Engineer | Most Interview Question Fresher |

Basic Concepts:

1. What is a computer? Describe its basic components.
2. Differentiate between hardware and software.
3. Explain the Von Neumann architecture.
4. What is a CPU? What are its components and functions?
5. Define RAM and ROM. What is the difference between them?
6. Explain the concept of cache memory.
7. Describe the role of an operating system.
8. What is a file system? Name some popular file systems.
9. Differentiate between 32-bit and 64-bit systems.
10. What is a compiler and interpreter? How do they differ?
11. Define algorithm and flowchart. What is the relationship between them?
12. Explain the difference between synchronous and asynchronous communication.

Programming:

13. What programming languages are you proficient in?
14. What is object-oriented programming (OOP)? Explain its principles.
15. Differentiate between procedural and object-oriented programming.
16. Explain the concept of inheritance in OOP.
17. What is polymorphism? Provide an example.
18. Define encapsulation. Why is it important?
19. Explain the concept of abstraction.
20. Describe the difference between stack and queue.
21. What is recursion? Provide an example.
22. Explain the difference between pass by value and pass by reference.
23. What is a pointer? How is it used in programming?
24. What is dynamic memory allocation? Provide examples.
25. Describe the difference between an array and a linked list.
26. Explain the concept of a data structure. Name some common data structures.
27. What is a binary search tree? How does it work?
28. Describe the difference between breadth-first search and depth-first search.
29. What is a sorting algorithm? Name a few sorting algorithms.
30. Explain the time complexity and space complexity of an algorithm.
31. Describe the difference between a stack and a heap.
32. What is the role of a constructor in OOP?
33. What is operator overloading? Provide an example.
34. Describe the concept of exception handling.
35. Explain the difference between compile-time and runtime errors.
36. What is multithreading? How is it implemented in programming?
37. Describe the difference between mutex and semaphore.

Data Structures and Algorithms:

38. What is a linked list? Explain its types.
39. What is a stack? Describe its operations.
40. Define a queue. How is it different from a stack?
41. What is a tree? Explain its types.
42. Describe binary search and its time complexity.
43. What is a graph? Explain its types.
44. Define hashing. What are its applications?
45. Describe different sorting algorithms.
46. Explain the concept of dynamic programming.
47. What is the difference between BFS and DFS?
48. Describe Dijkstra’s algorithm.
49. Explain the concept of greedy algorithms.
50. What is a priority queue? How is it implemented?

Database Management:

51. What is a database management system (DBMS)? Name some popular DBMS.
52. What is SQL? Explain its types.
53. Describe the difference between SQL and NoSQL databases.
54. What is normalization? Why is it important?
55. Explain the concepts of primary key, foreign key, and candidate key.
56. Describe different types of joins in SQL.
57. What is a trigger? Provide an example.
58. What is indexing? How does it improve database performance?
59. Explain the ACID properties of transactions.
60. What is a stored procedure? How is it different from a function?

Networking:

61. What is a network? Describe its types.
62. Define OSI model. Explain its layers.
63. What is TCP/IP? Describe its layers.
64. Differentiate between TCP and UDP.
65. Explain the concept of IP addressing.
66. Describe the difference between IPv4 and IPv6.
67. What is a subnet mask? How is it used?
68. Explain the role of a router in networking.
69. Describe the process of DNS resolution.
70. What is DHCP? How does it work?
71. Explain the concept of VLAN.
72. What is a firewall? How does it enhance network security?
73. Describe the difference between a hub and a switch.
74. What is NAT? Why is it used?

Operating Systems:

75. What is an operating system? Describe its functions.
76. Explain the difference between process and thread.
77. Describe the process scheduling algorithms.
78. What is deadlock? How can it be prevented?
79. Explain the difference between paging and segmentation.
80. Describe the role of a device driver.
81. What is virtual memory? How does it work?
82. Explain the concept of file system and its types.
83. Describe the difference between multiprogramming and multitasking.
84. What is a semaphore? How is it used for process synchronization?
85. Explain the difference between preemptive and non-preemptive scheduling.

Software Engineering:

86. What is software engineering? Describe its principles.
87. Define software development life cycle (SDLC).
88. Explain the difference between waterfall and agile methodologies.
89. What is version control? Why is it important?
90. Describe the concept of continuous integration (CI).
91. What is unit testing? How is it performed?
92. Explain the difference between black-box and white-box testing.
93. What is a UML diagram? Describe its types.
94. What is software documentation? Why is it important?
95. Explain the concept of software maintenance.
96. Describe the difference between validation and verification.

Web Development:

97. What is HTML? Describe its basic structure.
98. What is CSS? Explain its types.
99. Describe the difference between inline, internal, and external CSS.
100. What is JavaScript? How is it used in web development?
101. Explain the concept of DOM manipulation.
102. What is AJAX? How does it work?
103. Describe the difference between GET and POST methods.
104. What is a session? How is it managed in web development?
105. Explain the concept of responsive web design.
106. Describe the role of frameworks in web development.

Security:

107. What is cybersecurity? Describe its importance.
108. Explain the concept of encryption.
109. Describe different types of encryption algorithms.
110. What is a firewall? How does it protect a network?
111. Explain the concept of intrusion detection system (IDS).
112. What is malware? Describe its types.
113. Describe the process of penetration testing.
114. What is social engineering? How can it be prevented?
115. Explain the importance of regular software updates.

Cloud Computing:

116. What is cloud computing? Describe its benefits.
117. Explain the difference between public, private, and hybrid clouds.
118. Describe the concept of scalability in cloud computing.
119. What is virtualization? How is it used in cloud computing?
120. Explain the concept of Infrastructure as a Service (IaaS).
121. Describe the difference between SaaS, PaaS, and IaaS.

Miscellaneous:

122. Describe your understanding of artificial intelligence.
123. What is machine learning? Provide examples.
124. Explain the concept of big data.
125. Describe the difference between IoT and IIoT.
126. What is blockchain? How is it used in technology

?

127. Explain the concept of edge computing.
128. Describe your understanding of quantum computing.
129. What is the role of a computer engineer in today’s digital world?