Computer Awareness Notes for Banking and SSC Exams: Basics and MCQs

Computer awareness is easier to revise when each term has a role. RAM is working memory, a browser is an application and a router directs network traffic. Memorising expansions alone will not help when a question asks what a component actually does.

Use these as foundation notes. Computer-related coverage differs across banking and SSC examinations. For example, SSC CGL includes computer knowledge requirements in its official scheme; other examinations must be checked individually.

Hardware, software and the operating system

Hardware means physical components such as a keyboard, processor, storage device and monitor. Software means programs and associated instructions. An operating system manages resources and provides services for applications. A word processor is an application, not an operating system.

The CPU executes instructions. The arithmetic and logic unit performs arithmetic and logical operations, while control functions coordinate instruction execution. Do not describe the CPU as permanent storage for all user files.

Memory and storage

Pay attention to prefixes. In decimal notation, one kilobyte is 1,000 bytes. Binary units use names such as kibibyte, where one KiB is 1,024 bytes. Some older exam material uses KB informally for 1,024 bytes; read the convention supplied in the question.

Input, output and combined devices

A keyboard and a scanner provide input. A monitor and a printer provide output. A touchscreen can both display output and accept touch input. Classify a device by the function described, not only by whether it is attached to the computer.

Office applications

• Word processing: creating and formatting text documents; learn headings, page layout, tables and editing.
• Spreadsheets: arranging cells, using formulas and analysing data. In many common spreadsheets, a formula begins with an equals sign.
• Presentations: arranging information into slides, using layouts and presenting supporting visuals.
• Databases: organising related data so it can be stored, queried and updated.

In a spreadsheet, a relative reference such as A1 may change when copied. An absolute reference such as $A$1 fixes both the column and row in common A1-style notation. Practise this in an actual sheet instead of only memorising the symbols.

Internet and networking

The internet is a network of interconnected networks. The World Wide Web is one service that operates over it. A browser opens web content; a search engine helps users find content. They are not the same kind of tool.

A LAN covers a relatively limited area. A WAN connects over larger geographical areas. A router forwards packets between networks, while a switch typically connects devices within a network segment. DNS helps translate domain names into the information needed to reach services, including IP addresses.

HTTPS protects the connection using encryption and authentication mechanisms. Its presence does not prove that a shop, message or investment offer is honest.

Cyber safety: understand the scenario

Phishing uses deceptive messages or sites to trick people into revealing information or taking unsafe actions. Check a request through a separate trusted channel. Do not share an OTP because a message claims that your account will otherwise close.

Malware is malicious software; ransomware is a type associated with extortion, often by encrypting data or threatening exposure. Backups, updates and appropriate access controls are useful layers of protection.

Multi-factor authentication uses more than one category of authentication factor. A password plus another password is not automatically two different factors. Use supported strong authentication methods and never approve a login request you did not initiate.

Practice questions

These original practice questions are for learning; they are not claimed as previous-year exam questions.

Question 1

Which is normally volatile working memory?

1. SSD
2. RAM
3. DVD
4. Printed document

Answer: B. RAM. RAM typically holds active working data and loses its contents when power is removed.

Question 2

Which can function as both an input and an output device?

1. Touchscreen
2. Keyboard only
3. Printer only
4. Speaker only

Answer: A. Touchscreen. A touchscreen displays information and also detects user input.

Question 3

In common spreadsheet A1 notation, which fixes both row and column?

1. A1
2. $A$1
3. A:1
4. 1A

Answer: B. $A$1. The dollar signs fix the column and row in an absolute reference.

Question 4

Which statement about HTTPS is correct?

1. It guarantees the website owner is honest
2. It protects the connection but does not guarantee honest content
3. It means the website is a search engine
4. It prevents all phishing

Answer: B. It protects the connection but does not guarantee honest content. An encrypted connection can still lead to a deceptive website.

Question 5

How many bits are in one byte?

1. 2
2. 4
3. 8
4. 16

Answer: C. 8. One byte contains eight bits.

Revision plan

Start with one concept group, explain each term without looking and answer a mixed set. For every confusion, write a contrast: browser versus search engine, RAM versus storage, or authentication versus authorisation. Practise software operations where possible, because a screenshot-based question may test application rather than an expansion.

Conclusion

Learn the purpose, the contrast and a practical example for each term. Then use your current examination notice to decide how deeply to prepare each area.

Official references and updates

• SSC CGL 2026 official notice: computer knowledge syllabus
• CISA: multi-factor authentication
• FBI: spoofing and phishing explained

Keep practising with PrepZen

Review these concepts in PrepZen Computer Awareness and use practice to find terms you still confuse. Get PrepZen on Google Play and use its learning and practice features alongside your study plan.