JKSSB Computer Awareness MCQs

Explanation

The Correct Answer is: Data can be accessed from multiple locations

Here is a quick breakdown of why this is the primary advantage and why the other options are incorrect:

• Data can be accessed from multiple locations: Because your data is stored on remote servers (the "cloud") rather than on a single physical hard drive in your home or office, you can log into your account and retrieve your files from any device, anywhere in the world, as long as you have an internet connection. This is also excellent for disaster recovery if your local devices are destroyed or lost.

• Requires no internet access: This is the opposite of how cloud backups work. You must have an active internet connection to upload (backup) or download (restore) your files to and from the cloud.

• Uses no storage space: It absolutely uses storage space; it just uses the storage space on a company's remote servers (like Google or Amazon) instead of the storage space on your physical computer.

• Eliminates the need for passwords: Cloud backups still require strict security measures, including strong passwords and often Two-Factor Authentication (2FA), to ensure that unauthorized people cannot access your private data over the internet.

Explanation

The Correct Answer is: Making copies of data for recovery purposes

Here is a quick breakdown of what a backup is and why the other options are incorrect:

• Making copies of data for recovery purposes: This is the exact definition of a data backup. The goal is to create a secure, redundant copy of your important information so that if the original data is lost, corrupted, or destroyed (due to hardware failure, malware, or accidental deletion), you can easily restore it.

• Deleting unwanted files: This is a method of freeing up storage space or organizing your system, which is unrelated to preserving data.

• Renaming files for hiding purposes: This is a very basic (and generally ineffective) way to obscure information, but it does nothing to protect the data from being lost or corrupted.

• Compressing files for future use: While data backups can be compressed (like into a .zip file) to save storage space, compression itself is just a technique for reducing file size, not a backup strategy on its own.

Explanation

The Correct Answer is: To retrieve or manipulate specific data

Here is a quick breakdown of why this is the correct choice and what the other options mean in the context of databases:

• To retrieve or manipulate specific data: A query is essentially a precise request or command you send to a database (often using a language like SQL). Its primary job is to ask the database a question (e.g., "Show me all customers from New York") or tell it to perform an action on the data (like updating, inserting, or deleting specific records).

• To print data: While you might eventually print the results you get from a query, the query itself does not physically print anything; it only fetches the information. Specialized reporting tools are usually used for formatting and printing.

• To create folders: Databases organize information using structures like tables, rows, columns, and schemas—not the standard file system folders you see on your desktop.

• To delete the database permanently: While there is a specific, highly destructive command you can run to wipe out an entire database (like DROP DATABASE in SQL), that is an administrative action, not the general, everyday purpose of a "query."

Explanation

The Correct Answer is: Microsoft Access

Here is a quick breakdown of why this is the correct choice and what the other options represent:

• Microsoft Access: This is a popular relational database management system (DBMS) developed by Microsoft. It is designed to store, manage, link, and query large sets of structured data.

• Microsoft World: This is not a real program. It is likely a typo for Microsoft Word, which is a word processor, not a database manager.

• Oracle Paint: This software does not exist. While Oracle is a massive tech company famous for its enterprise-grade database systems (Oracle Database), they do not produce a graphic design program called "Paint."

• Sequel pad: This is a made-up term, likely designed to confuse test-takers by combining the database language "SQL" (often pronounced sequel) with text editors like Notepad or WordPad.

Explanation

The Correct Answer is: Provide an extra layer of security during login

Here is a quick breakdown of how 2FA works and why the other options are incorrect:

• Two-Factor Authentication (2FA): This security method requires you to provide two distinct forms of identification before granting access to an account. The first factor is usually something you know (like your password), and the second is usually something you have (like a temporary code sent to your phone or generated by an authenticator app). This ensures that even if a hacker steals your password, they still cannot access your account without your physical device.

• Increase internet speed: This depends on your Internet Service Provider (ISP), bandwidth, and networking hardware (like routers), not security protocols.

• Reduce storage space: Managing storage space involves file compression, deleting old data, or using cloud storage, which is unrelated to logging in securely.

• Send automatic emails: This refers to email automation, autoresponders, or mailing list software, which has nothing to do with account authentication.

Explanation

The Correct Answer is: A cyberattack to steal sensitive information through fake messages or websites

Here is a quick breakdown of how phishing works and why the other options are incorrect:

• Phishing (The Cyberattack): This is a form of social engineering where an attacker masquerades as a trusted entity—like your bank, a popular streaming service, or even a colleague. They send fraudulent emails, texts, or instant messages designed to trick you into clicking a malicious link, downloading malware, or handing over sensitive data like passwords and credit card numbers.

• A method of computer repair: Fixing hardware or software issues has nothing to do with phishing, which is strictly a malicious activity.

• A type of web browser: Web browsers (like Chrome, Safari, or Edge) are the tools you use to access the internet. While a phishing attack might direct you to a fake website using a browser, the browser itself is not the attack.

• A cloud storage technique: Cloud storage involves saving data on remote servers (like Google Drive). Phishing is an attempt to steal your data, not a method of storing it.

Explanation

The Correct Answer is: Using internet based services for storage and computing

Here is a quick breakdown of why this is the correct choice and what the other options represent:

• Using internet based services for storage and computing: This is the core definition of cloud computing. Instead of relying on a local hard drive or a private on-site server, you are using a network of remote servers hosted on the internet to store, manage, and process data (like Google Drive, AWS, or Microsoft OneDrive).

• Storing data only on personal computers: This is the exact opposite of cloud computing. This is known as "local storage."

• Weather forecasting systems: While meteorologists use supercomputers (and often cloud computing) to model the weather, the term "cloud" in computing is a metaphor for the internet, not actual meteorological clouds.

• Computer networking cables: These represent the physical hardware (like Ethernet or fiber optic cables) used to connect devices locally or globally, rather than the distributed software and server services that define the cloud.

Explanation

The Correct Answer is SMTP

Here is a quick breakdown of what each of these protocols is used for:

• SMTP (Simple Mail Transfer Protocol): This is the standard protocol specifically designed for sending and routing email messages across the internet from one server to another.

• FTP (File Transfer Protocol): Used for transferring computer files between a client and a server on a computer network.

• HTTP (Hypertext Transfer Protocol): The foundation of data communication for the World Wide Web, used primarily for loading web pages and transmitting web content.

• TCP (Transmission Control Protocol): A core foundational protocol of the internet that establishes connections and ensures data packets are reliably delivered across a network. (SMTP actually relies on TCP as its underlying transport mechanism).

Explanation

The Correct Answer is: Uniform Resource Locator

Here is a quick breakdown of what a URL actually does and how it works:

• What it is: A URL is essentially the specific web address you type into a browser to find a particular webpage, image, file, or resource on the internet.

• How it works (The Anatomy of a URL): * Scheme (e.g., https://): Tells the browser which protocol to use to access the resource (secure web traffic).

  • Domain Name (e.g., www.google.com): Identifies the specific server or website where the resource is hosted.

  • Path (e.g., /search/images): Directs the browser to the specific folder or page within that website.

Explanation

The Correct Answer is BCC

Here is a quick breakdown of how these standard email fields work:

• BCC (Blind Carbon Copy): This field is used when you want to send an email to someone without the other recipients knowing. Any email address placed in the BCC field is hidden from everyone else who receives the email. It is highly useful for protecting privacy when sending emails to a large mailing list.

• To: This field is for the primary recipients of the email. Everyone listed here is visible to all other recipients.

• CC (Carbon Copy): This field is used to keep secondary recipients "in the loop" for informational purposes, even if no direct action is required from them. Like the "To" field, all email addresses here are visible to everyone.

• Subject: This is not a recipient field; it is the title or short summary of what the email is about, visible to all recipients before they open the message.

Explanation

The Correct Answer is 01010000

Here is a quick breakdown of why this is the correct choice and what the other strings represent:

• 01010000: This is the only string that consists exclusively of 0s and 1s, which is the fundamental requirement for binary (base-2) data.

• 00120000: This string contains a 2. The binary number system only uses two digits: 0 and 1. The presence of a 2 means this cannot be binary.

• 00fe0001: This string contains letters (f and e). This is an example of hexadecimal (base-16) data, which uses numbers 0-9 and letters A-F to represent values.

• 000A110: This string contains the letter A, which again indicates it is hexadecimal data, not binary.

Explanation

The Correct Answer is Now()

Here is a quick breakdown of what each of these functions does in Microsoft Excel:

• NOW(): This is a Date & Time function that returns the current system date and time. It updates automatically whenever the worksheet is recalculated or opened.

• FIND(): A Text function used to locate the starting position of a specific character or substring within a larger text string.

• MOD(): A Math & Trigonometry function that calculates and returns the remainder after a number is divided by a chosen divisor.

• MID(): A Text function used to extract a specific number of characters from the middle of a text string, starting at the exact position you specify.

Explanation

The Correct Answer is: Ctrl + E

Here is a quick breakdown of the standard keyboard shortcuts for the options you listed:

• Ctrl + E: Applies center alignment to the selected text or paragraph.

• Ctrl + S: Saves the current document.

• Ctrl + C: Copies the selected text or item to your clipboard.

• Ctrl + C + A: This is not a standard shortcut. However, Ctrl + A on its own is used to select all text in the document.

Explanation

The Correct Answer is 400%

Here is a quick breakdown of zoom capabilities in Microsoft Office applications for context:

• Microsoft PowerPoint: The maximum zoom level is 400%. This high level of magnification is particularly useful when you need to make precise adjustments to small shapes, text, animations, or graphics on a specific slide.

• Microsoft Excel: The maximum zoom level is also 400%.

• Microsoft Word: The maximum zoom level is slightly higher, allowing you to zoom in up to 500%.

Explanation

The Correct Answer is: Create a New Document

Here is a quick breakdown of the standard keyboard shortcuts for all the options you listed:

• Create a New Document: Ctrl + N

• Save the Document: Ctrl + S (Use F12 for "Save As")

• Open the Document: Ctrl + O

• Close the Document: Ctrl + W (or Ctrl + F4)

Explanation

The Correct Answer is Landscape

Here is a quick breakdown of what each of these terms actually refers to in a word processor:

• Landscape: This is a type of page orientation where the document is wider than it is tall (horizontal). The only other standard orientation is Portrait (taller than it is wide).

• A4: This refers to the physical page size of the document (specifically, a standard international paper size measuring 210 x 297 mm). It does not dictate which way the page is turned.

• Subscript: This is a font formatting style that shrinks a character and places it slightly below the normal line of text (like the "2" in H₂O).

• Superscript: This is a font formatting style that shrinks a character and places it slightly above the normal line of text (like the "2" in X²).

Explanation

The Correct Answer is Insert

Here is a quick breakdown of what you typically find on each of these tabs in Microsoft Word:

• Insert: As the name suggests, this tab is used to add new elements into your document. This includes Headers, Footers, and Page Numbers, as well as Tables, Pictures, Shapes, Charts, and Hyperlinks.

• Home: The default working tab. It contains the most fundamental text formatting tools, such as font style, size, color, bold/italics, paragraph alignment, and bullet points.

• Page Layout (often just called "Layout"): Used to control the physical dimensions and structure of the document's pages. You go here to adjust margins, switch between portrait and landscape orientation, or add columns.

• View: Used exclusively to change how the document appears on your screen while you work. You can switch to Read Mode, adjust the Zoom level, or turn on visual aids like the Ruler and Gridlines.

Explanation

The Correct Answer is: Applies italic format to selected text

Here is a quick breakdown of the standard keyboard shortcuts for the options you listed:

• Applies italic format to selected text: Ctrl + I

• Indicate the text should be bold: Ctrl + B

• Increase font size: Ctrl + Shift + > (or Ctrl + ])

• Inserts a line break: Shift + Enter

Explanation

The Correct Answer is: Slide Sorter

Here is a quick breakdown of what each view does in Microsoft PowerPoint:

• Slide Sorter: This view displays all the slides in your presentation as horizontally sequenced thumbnails. It is incredibly useful for getting a bird's-eye view of your presentation, easily rearranging the order of slides, and applying transition effects to multiple slides at once.

• Normal View: This is the default working view where you write and design your presentation. It typically features a large view of the current slide in the center, with a pane of smaller slide thumbnails on the left.

• Slide Show: This view takes up the full computer screen, showing exactly how your presentation will look when you present it to an audience.

• Notes Page: This view shows your slide on the top half of the page and a text box below it for any speaker notes you have typed, which is highly useful for printing out reference material before a presentation.

Explanation

The Correct Answer is SSD

Here is a quick breakdown of how these storage devices compare in terms of speed:

• SSD (Solid State Drive): Uses flash memory chips to store data instead of mechanical parts. Because there is no physical movement required to read or write data, SSDs offer near-instant access times, making them the fastest option by a wide margin.

• HDD (Hard Disk Drive): Relies on spinning magnetic platters and a mechanical arm with a read/write head. While still relatively fast and great for bulk storage, the physical time it takes for the disk to spin and the arm to move makes it significantly slower than an SSD.

• DVD (Digital Video Disc): An optical storage medium that uses a laser to read data from a spinning plastic disc. It is considerably slower than both SSDs and HDDs and is typically used for media playback or software installation.

• Magnetic Tape: Uses sequential access, meaning the drive must physically spool through a ribbon of tape to find the correct data point. This makes its random access speed extremely slow, though it remains highly efficient for cheap, long-term archival backups.

Explanation

The Correct Answer is MAX()

Here is a quick breakdown of why this is the correct function and what the others mean:

• MAX(): This is the standard, built-in Excel function specifically designed to evaluate a range of cells (like =MAX(A1:A10)) and return the single largest numerical value within that range.

• LARGEST(): This function does not exist in Excel. However, Excel does have a similar function called LARGE(), which is used to find the nth largest value in a dataset (e.g., finding the 2nd or 3rd highest number).

• HIGHEST() and ELEVATED(): Neither of these are valid functions in Microsoft Excel.

Explanation

The Correct Answer is F7

Here is a quick breakdown of what each of these function keys typically does in Microsoft Word:

• F7: Opens the Editor pane or the spelling and grammar dialog box to check your document for errors.

• F1: Opens the Help pane or directs you to Microsoft Word's help and support resources.

• F2: Used for moving text or graphics. (After selecting text, you press F2, click where you want to move it, and press Enter).

• F9: Refreshes or updates selected fields in your document, such as a table of contents, formulas, or date fields.

Explanation

The Correct Answer is: Heavy network traffic

Here is a quick breakdown of why this is the primary culprit and how the other options typically manifest:

• Heavy Network Traffic: When too much data is trying to pass through a network at once, it exceeds the bandwidth capacity of routers and switches. This causes network congestion, forcing data packets to wait in queues before being processed and forwarded, which directly results in high latency (delay).

• Incorrect IP Configuration: This usually results in a complete failure to connect to the network or the internet (e.g., an IP conflict or a wrong gateway), rather than just slowing it down.

• Hardware Failure: While a failing switch or a degraded cable can cause packet loss (which requires retransmissions and feels like latency), complete hardware failure generally results in a total drop in connectivity rather than just high latency.

• Malware Infection: While malware (like a botnet participating in a DDoS attack) can cause high latency, it does so by generating heavy network traffic. Therefore, the traffic itself is the direct mechanical cause of the latency.

Explanation

The Correct Answer is 80

Here is a quick breakdown of what each of those common port numbers is used for:

• Port 80 (HTTP): The standard, default port used for unencrypted web traffic.

• Port 443 (HTTPS): The default port used for secure web browsing, where the data sent between your browser and the website is encrypted.

• Port 21 (FTP): Used by the File Transfer Protocol for establishing the command and control connection when transferring files between a client and server.

• Port 25 (SMTP): The standard port used for sending and routing email messages across

Explanation

The Correct Answer is: Memory management

Here is a quick breakdown of why this is the correct choice and what the other options represent:

• Memory Management: This is a core, fundamental responsibility of the kernel. The kernel acts as a traffic controller for your computer's RAM, deciding how much memory each active program gets, tracking which parts of memory are in use, and ensuring that different programs do not accidentally overwrite each other's data.

• File Management: While the kernel does interact with the file system at a low level, file management is generally considered a broader function of the entire operating system, whereas memory management is strictly a low-level kernel duty.

• User Interface Design: The user interface (whether a visual desktop or a text command line) is managed by the OS's "shell." The shell operates entirely in "user space," meaning it sits on top of the kernel and is completely separate from it.

• Hardware Design: This refers to the physical engineering and manufacturing of the computer components (like motherboards and chips), which is completely unrelated to software functions.

Explanation

The Correct Answer is: To manage hardware and software resources

Here is a quick breakdown of how an operating system (OS) functions:

• Resource Management: The OS acts like a traffic cop for your computer. It allocates and manages the physical hardware—such as the CPU (processing power), RAM (memory), and storage drives—ensuring that every active program gets the resources it needs without interfering with others.

• The Intermediary: It serves as a necessary bridge between the application software (like your web browser or video games) and the computer's hardware. Without an OS, every individual application would need to be programmed to know exactly how to communicate with the motherboard, screen, and keyboard directly.

• User Interface: It provides a structured way for users to interact with the machine, whether through a visual desktop (Graphical User Interface or GUI, like Windows and macOS) or a text-based terminal (Command-Line Interface or CLI, like Linux).

Explanation

The Correct Answer is: System software manages computer resources, while application software performs specific tasks for users

Here is a quick breakdown of the core differences:

• System Software (The Foundation): This software operates in the background and is essential for the computer to run. It acts as the bridge between the computer's hardware (CPU, memory, storage) and the applications you want to use.

  • Examples: Operating systems (Windows, macOS, Linux, Android), device drivers, and basic utility programs.

• Application Software (The Tools): This software is optional and installed according to the user's needs. It is designed to help you perform specific, end-user tasks like writing a document, browsing the web, or playing a game. Application software cannot run on its own; it requires system software to function.

  • Examples: Web browsers (Chrome, Safari), word processors (Microsoft Word), spreadsheets, and video games.

Explanation

The Correct Answer is 1101

Here is a quick breakdown of how to convert the decimal number 13 into binary using the place value method:

• Place Values: In the binary (base-2) system, each digit represents a power of 2, starting from the right (1, 2, 4, 8, 16, etc.).

• Finding the Bits: To convert 13, you find the combination of these place values that adds up exactly to 13.

  • 8: 13 contains an 8 (13 - 8 = 5). So, the "8s" place gets a 1.

  • 4: 5 contains a 4 (5 - 4 = 1). So, the "4s" place gets a 1.

  • 2: 1 does not contain a 2. So, the "2s" place gets a 0.

  • 1: 1 contains exactly one 1 (1 - 1 = 0). So, the "1s" place gets a 1.

• The Result: Putting those bits together from left to right (8s, 4s, 2s, 1s), we get 1101.

Explanation

The Correct Answer is: To divide an IP address into network and host portions

Here is a quick breakdown of how it works:

• IP Address Structure: Every IP address on a TCP/IP network consists of two components: a network portion (which identifies the specific network or subnet) and a host portion (which identifies the specific device, like your computer or phone, on that network).

• The Mask's Job: A subnet mask acts like a filter or a stencil. It uses a sequence of bits to "mask" the IP address, telling the router or computer exactly where the network part ends and the host part begins. For example, in the common subnet mask 255.255.255.0, the first three sections represent the network, and the final section represents the host.

• Why It Matters: This division is crucial for routing data efficiently. It helps a device determine whether another device it wants to talk to is on the local network (meaning they can communicate directly) or on a remote network (meaning the data must be forwarded to a default gateway or router).

Explanation

The Correct Answer is HTTPS

The protocol commonly used for secure web browsing is HTTPS.

Here is a quick breakdown of what each protocol does:

• HTTPS (Hypertext Transfer Protocol Secure): This is the secure version of HTTP. It encrypts the data sent between your browser and the website you are connected to (typically using TLS/SSL), ensuring that sensitive information like passwords or credit card numbers cannot be intercepted.

• HTTP (Hypertext Transfer Protocol): The standard protocol for transferring data over the web. However, data is sent in plain text, making it insecure and vulnerable to eavesdropping.

• FTP (File Transfer Protocol): Used specifically for transferring files between a client and a server on a computer network, rather than rendering web pages.

• SMTP (Simple Mail Transfer Protocol): The standard protocol used for sending email messages across the internet.