Computer Hardware and Software Questions and Answers
Computer Hardware and Software aptitude questions and answers with explanations help students understand the basics of how computers function internally and interact through software. These questions are commonly asked in competitive exams and placement tests by companies like TCS, Wipro, and Infosys. This topic covers essential hardware components such as CPU, memory, storage devices, and input-output units, as well as software categories like system software, application software, and utilities. Mastering these concepts helps candidates build a strong technical foundation and perform well in logical reasoning and technical aptitude sections. Practice more aptitude questions with solutions PDF and attempt online tests to boost accuracy and speed in hardware–software-related problems.
Computer Hardware and Software
21. Which of the following is not hardware
- Mouse
- Monitor
- Explanation: An operating system is software, not hardware.
- Printer
22. Which device is used to store data permanently
- RAM
- Cache
- Explanation: Hard disks store data permanently.
- Register
23. Which software helps in virus detection and removal
- Compiler
- Explanation: Antivirus software protects the system from malware.
- Word Processor
- Browser
24. Which part of the CPU performs arithmetic operations
- Control Unit
- Explanation: ALU performs arithmetic and logical operations.
- Register
- Cache
25. Which memory is fastest among the following
- Hard Disk
- RAM
- Explanation: Cache memory is the fastest type of memory.
- CD
26. Which of the following is application software
- Linux
- Windows
- Explanation: MS Word is used for document creation.
- BIOS
27. Which device converts digital signals into audio output
- Microphone
- Explanation: Speakers convert digital signals into sound.
- Scanner
- Webcam
28. Which key is used to delete characters to the left of the cursor
- Delete
- Shift
- Enter
- Explanation: Backspace removes characters to the left of the cursor.
29. Which software translates high-level language into machine language
- Editor
- Explanation: A compiler converts high-level code into machine code.
- Loader
- Linker
30. Which device is used to point and select items on the screen
- Keyboard
- Monitor
- Explanation: A mouse is a pointing device.
- Printer