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CSS MCQs

Civil Superior Services — Complete MCQ Bank

53 Questions
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CSS is Pakistan’s premier federal competitive examination. Strong preparation requires conceptual clarity, broad general knowledge and consistent practice across compulsory and optional areas.

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1
Computer Science Medium

Which data structure is primarily used by the Depth-First Search (DFS) algorithm?

  • AQueue
  • BHash Table
  • CStack
  • DHeap
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Correct Answer: Option C — Stack
Explanation: Depth-First Search (DFS) uses a stack to keep track of nodes during traversal. The algorithm explores one branch of a graph or tree as deeply as possible before backtracking to explore other branches. DFS can use an explicit stack or the system's call stack through recursion. This approach is useful for pathfinding, graph traversal, cycle detection, and topological sorting.
Submitted by: Chandi
2
Computer Science Medium

What does "GPT" stand for in ChatGPT?

  • AGlobal Prediction Technique
  • BGenerative Pre-trained Transforme
  • CGeneral Processing Tool
  • DGraphical Pattern Tracke
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Correct Answer: Option B — Generative Pre-trained Transforme
Explanation: GPT stands for Generative Pre-trained Transformer. It is a family of artificial intelligence language models developed by OpenAI. These models are pre-trained on large amounts of text to learn language patterns and can then generate human-like responses, answer questions, summarize information, translate text, assist with coding, and perform many other natural language processing tasks.
Submitted by: Chandi
3
Computer Science Medium

In Machine Learning, what is a hyperparameter?

  • AA configuration set before training
  • BA learned weight
  • CAn output label
  • DA type of dataset
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Correct Answer: Option A — A configuration set before training
Explanation: A hyperparameter is a setting or configuration chosen before training a machine learning model. Unlike model parameters, which are learned from data during training, hyperparameters are predefined by the user. Examples include the learning rate, batch size, number of epochs, and the number of hidden layers. Proper hyperparameter selection can significantly improve a model's accuracy and performance.
Submitted by: Chandi
4
Computer Science Medium

What is the full form of "NLP" in Artificial Intelligence and Computer Science?

  • ANumeric Learning Program
  • BNetwork Layer Protocol
  • CNeural Logic Processing
  • DNatural Language Processing
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Correct Answer: Option D — Natural Language Processing
Explanation: Natural Language Processing (NLP) is a branch of Artificial Intelligence (AI) that enables computers to understand, interpret, generate, and respond to human language. NLP is used in applications such as chatbots, language translation, speech recognition, sentiment analysis, voice assistants, and text summarization, allowing machines to communicate more naturally with people
Submitted by: Chandi
5
Computer Science Medium

Which search algorithm explores all nodes one level at a time before moving to the next level?

  • AA* Search
  • BDepth-First Search (DFS)
  • CBreadth-First Search (BFS)
  • DGreedy Search
Permalink
Correct Answer: Option C — Breadth-First Search (BFS)
Explanation: Breadth-First Search (BFS) explores a graph or tree level by level, visiting all nodes at the current depth before moving to the next level. It uses a queue (FIFO) data structure to manage nodes. BFS is particularly useful for finding the shortest path in an unweighted graph because it guarantees the minimum number of edges from the starting node to the destination.
Submitted by: Chandi
6
Computer Science Medium

Why are Headers and Footers added to a document in MS Word?

  • ATo mark the beginning of a page
  • BTo improve the document's appearance
  • CTo display repeating information such as page numbers, dates, and titles on printed pages
  • DTo make a document easier to read
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Correct Answer: Option C — To display repeating information such as page numbers, dates, and titles on printed pages
Explanation: Headers and Footers are used to place information that appears repeatedly on every page of a document, such as page numbers, document titles, dates, author names, or company names. This feature helps maintain consistency, improves document organization, and ensures important information is visible when the document is printed or viewed electronically.
Submitted by: Chandi
7
Computer Science Medium

On which tab in Microsoft Word can you find the Header and Footer commands?

  • AHome
  • BReferences
  • CView
  • DInsert
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Correct Answer: Option D — Insert
Explanation: In Microsoft Word, the Header and Footer options are located on the Insert tab. These features allow users to add information such as page numbers, document titles, dates, author names, and other repetitive content at the top (header) or bottom (footer) of every page. This helps create professional and well-organized documents.
Submitted by: Chandi
8
Computer Science Medium

What type of communication occurs between a computer and a keyboard?

  • AFull-Duplex
  • BSimplex
  • CHalf-Duplex
  • DMultiplex
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Correct Answer: Option B — Simplex
Explanation: Simplex communication is a one-way communication method in which data flows in only one direction. In the case of a keyboard and a computer, the keyboard sends input signals to the computer, but it does not receive data back for communication purposes. Therefore, this interaction is commonly classified as simplex communication in computer networking and data communication concepts.
Submitted by: Chandi
9
Computer Science Medium

Which protocol is commonly used to create a secure and encrypted communication channel over the Internet?

  • AHTTPS (SSL/TLS)
  • BFTP
  • CDHCP
  • DTelnet
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Correct Answer: Option A — HTTPS (SSL/TLS)
Explanation: HTTPS (HyperText Transfer Protocol Secure) uses SSL/TLS encryption to protect data exchanged between a user's browser and a web server. It ensures confidentiality, integrity, and authentication of information, preventing attackers from intercepting or modifying sensitive data such as passwords, payment details, and personal information while it is transmitted over potentially insecure networks.
Submitted by: Chandi
10
Computer Science Medium

What is the main purpose of a Firewall in a computer network?

  • ATo prevent unauthorized access
  • BTo remove all viruses from a computer
  • CTo increase internet speed
  • DTo store network Data
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Correct Answer: Option A — To prevent unauthorized access
Explanation: A Firewall is a network security system that monitors and controls incoming and outgoing traffic based on predefined security rules. Its primary purpose is to prevent unauthorized users, hackers, or malicious programs from accessing a computer or network. While a firewall can help block some threats, it is not a substitute for antivirus software and does not increase network speed.
Submitted by: Chandi
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