Computer — All MCQs

4795 questions available

Showing 3781–3800 of 4795

Q3781.What is the primary function of the Arithmetic Logic Unit (ALU) within a computer system processor?

Easy
A To coordinate the flow of system signals
B To execute arithmetic calculations and logical operations
C To manage physical memory allocation
D None of these
Computer Basics PPSC

Correct Answer: B

The ALU handles mathematical operations (addition, subtraction) and logical operations (AND, OR, NOT, comparisons) on binary numbers.

Q3782.Which data structure is the most efficient choice for implementing a priority queue?

Easy
A Array
B Linked List
C Binary Heap
D None of these
Computer Terminology PPSC

Correct Answer: C

A binary heap (min-heap or max-heap) supports priority queue operations (insertion and extraction of priority elements) in efficient O(log n) time.

Q3783.Which of the following statements best describes the Object-Oriented Programming (OOP) concept of Polymorphism?

Easy
A The process of grouping related classes together
B The ability of an object or method to take on multiple forms
C The enforcement of data hiding and access control
D None of these
Computer Basics PPSC

Correct Answer: B

Polymorphism (meaning 'many forms') allows methods to behave differently based on the object executing them, as seen in overriding.

Q3784.On average, what is the expected time complexity for searching for a key in a well-implemented Hash Table?

Easy
A O(1) - Constant Time
B O(N) - Linear Time
C O(log N) - Logarithmic Time
D None of these
General MCQs PPSC

Correct Answer: A

On average, a hash table offers O(1) constant-time lookup by mapping keys directly to indices using a hash function.

Q3785.Which type of cyberattack involves sending fraudulent emails or messages to trick users into revealing sensitive credentials?

Easy
A Denial of Service (DoS)
B Phishing
C SQL Injection
D None of these
Computer Terminology PPSC

Correct Answer: B

Phishing is a social engineering attack that mimics legitimate entities to steal credentials, credit card details, or PII.

Q3786.In Java programming, what is the primary purpose of defining a constructor?

Easy
A To destroy obsolete objects and free memory
B To initialize a newly created object's state
C To execute loop operations automatically
D None of these
Computer Terminology PPSC

Correct Answer: B

A constructor is a special method automatically called when an object is instantiated to set up and initialize its initial parameters.

Q3787.What is the worst-case time complexity of a program containing nested for-loops where both loops execute 'N' times?

Easy
A O(N)
B O(N^2)
C O(log N)
D None of these
Computer Terminology PPSC

Correct Answer: B

If a loop running N times contains another loop running N times, the inner statements execute N * N = N^2 times, yielding O(N^2) complexity.

Q3788.Which storage device is highly recognized for its high-speed data access and extremely low latency compared to traditional mechanical drives?

Easy
A Solid State Drive (SSD)
B Hard Disk Drive (HDD)
C Optical Disc Drive (ODD)
D None of these
General MCQs PPSC

Correct Answer: A

SSDs use non-volatile flash memory chips instead of spinning mechanical platters, resulting in faster read/write speeds and low latency.

Q3789.How many unique digits are used to represent numbers in a base-5 (quinary) number system?

Easy
A 5
B 10
C 8
D None of these
General MCQs PPSC

Correct Answer: A

A base-5 number system uses exactly 5 unique digits: 0, 1, 2, 3, and 4. A base-N system always utilizes N distinct digits.

Q3790.Which neural network architecture serves as the core foundation upon which Large Language Models like ChatGPT are built?

Easy
A Transformer architecture
B Recurrent Neural Network (RNN)
C Convolutional Neural Network (CNN)
D None of these
Computer Terminology PPSC

Correct Answer: A

ChatGPT is built on the Transformer architecture, which uses self-attention mechanisms to process sequential language data in parallel.

Q3791.In digital marketing and business, how is Meta AI commonly utilized?

Easy
A Improving advertising and audience targeting
B Enhancing automatic customer engagement
C Automating large-scale data analysis
D All of the above
Computer Terminology PPSC

Correct Answer: D

Meta AI is used in business to optimize ad targeting, support AI-driven customer chatbots, and analyze user engagement trends.

Q3792.The specialized E-construction application developed by government portals is primarily used to facilitate ______?

Easy
A Road and pavement maintenance
B Online building permit approval
C Automated traffic light control
D None of these
General MCQs PPSC

Correct Answer: B

E-construction apps streamline and digitize municipal workflows, allowing citizens to apply for and track building permits online.

Q3793.In conversational generative AI models like ChatGPT, Natural Language Processing (NLP) is primarily used for generating ______?

Easy
A Text-based responses
B Video-based edits
C Audio/Music files
D None of these
Computer Terminology PPSC

Correct Answer: A

NLP allows conversational models to process natural language input and generate coherent, context-aware text-based responses.

Q3794.What is the primary objective of the Dastak mobile application launched by government departments?

Easy
A To provide doorstep delivery of essential public services and certificates
B To facilitate online e-commerce shopping
C To provide local ride-hailing services
D None of these
Internet Services & Communication PPSC

Correct Answer: A

The Dastak application is a citizen-focused initiative that facilitates home delivery of public services (e.g., certificates, licenses).

Q3795.Which mobile financial service wallet is most widely used in Pakistan for instant, secure peer-to-peer money transfers?

Easy
A Easypaisa
B JazzCash
C PayPal
D None of these
General MCQs PPSC

Correct Answer: B

While both exist, JazzCash and Easypaisa are the primary mobile wallet networks in Pakistan. The source highlights JazzCash as a popular financial transfer service.

Q3796.What is the primary function and capability of the official Pakistan Railway mobile application?

Easy
A Tracking train schedules and live locations
B Booking and purchasing tickets online
C Checking seat availability across routes
D All of the above
General MCQs PPSC

Correct Answer: D

The Pakistan Railway app provides complete traveler assistance, including seat availability checks, real-time schedule tracking, and e-ticketing.

Q3797.What is the primary service offered by the ePay Punjab digital payment application?

Easy
A Online payment of utility bills and government taxes
B Applying for local domicile certificates
C Registering corporate business names
D None of these
Internet Services & Communication PPSC

Correct Answer: A

ePay Punjab is an e-governance payment gateway used to electronically pay taxes, token fees, and utilities directly to the government.

Q3798.Which official mobile application developed by NADRA is used to apply for national ID verification and domicile certificates in Pakistan?

Easy
A Pak Identity
B NADRA Domicile Portal
C Pak Domicile
D None of these
General MCQs PPSC

Correct Answer: A

The 'Pak Identity' app developed by NADRA allows citizens to verify biometric data and apply for official identity documents online.

Q3799.In Microsoft Excel, which built-in tools are categorized under 'What-If Analysis'?

Easy
A Goal Seek
B Solver
C Scenario Manager
D All of above
MS Excel PPSC

Correct Answer: D

Excel's What-If Analysis tools include Goal Seek, Scenario Manager, and Data Tables. Solver is a advanced optimization add-in grouped under analysis.

Q3800.In Microsoft PowerPoint, from which ribbon tab can a user apply pre-designed visual Themes to a presentation?

Easy
A Insert Tab
B Home Tab
C Design Tab
D View Tab
MS PowerPoint PPSC

Correct Answer: C

The Design tab houses themes, color palettes, slide sizes, and background formats, applying them instantly to all slides.