WAEC SSCE - Computer Studies - 2022 (Objective)

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The correct answer is "I and II only". Booting refers to the process of starting up a computer system. During this process, the computer goes through several stages before the operating system is loaded and the user can begin using the computer. The first stage of booting is the Power on Self Test (POST), which checks the hardware components of the computer to make sure they are functioning properly. If any issues are detected during the POST, an error message will be displayed. The second stage of booting is the loading of the operating system. Once the hardware checks are completed, the computer loads the operating system from the hard drive or another storage device. Options III and IV are not stages of the booting process. Loading of emails is a task performed by an email client after the operating system has loaded, and starting in safe mode is an option that can be selected during the booting process to troubleshoot issues with the operating system.

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The program that is loaded into a special area on a microprocessor or ROM on a one-time basis and becomes part of the hardware is called firmware. Firmware is a specific type of software that is embedded into hardware devices, such as microprocessors or other electronic components, to perform a specific function. Firmware is designed to be permanent and cannot be easily modified or updated like other software programs. It is often used in devices like routers, printers, and digital cameras, where it provides low-level control of the hardware and ensures that the device functions correctly.

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To evaluate the expression, we need to follow the rules of arithmetic operations, which are Parentheses, Exponents, Multiplication and Division, and Addition and Subtraction (PEMDAS). First, we calculate 4^2, which is 16. Then, we perform multiplication and division from left to right, giving us: 2*6 + 2/4 * 2 * 16 = 12 + 0.5 * 32 = 12 + 16 = 28 Therefore, the result of the expression is 28. Hence, the correct option is "28".

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Serial files are stored as they come, meaning that the records are simply added to the end of the file as they are created or received. A serial file is a type of file organization used in computer systems where records are stored one after the other, with no particular order or sequence. The records are simply appended to the end of the file as they are created or received, and there is no attempt to sort or organize them in any particular way. Serial files are commonly used for logging or recording sequential events such as sensor readings, financial transactions, or web server requests. They are simple and easy to implement and are suitable for applications where the records are read in the order they were created. However, one drawback of serial files is that searching and sorting records can be time-consuming and inefficient because the records are not stored in any particular order. For applications that require frequent searching or sorting of records, other file organization methods such as indexed files or relational databases may be more appropriate. Therefore, the correct answer to the question is that serial files are stored as they come, with no particular order or sequence.

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The maximum length of a text field in MS Access is 255 characters. This means that you can store up to 255 characters of text in a single field in a table. To put it simply, imagine that you have a field in a table that is used to store people's names. The maximum length of that field would be 255 characters, which is enough to accommodate even the longest names in the world (e.g., "Adolph Blaine Charles David Earl Frederick Gerald Hubert Irvin John Kenneth Lloyd Martin Nero Oliver Paul Quincy Randolph Sherman Thomas Uncas Victor William Xerxes Yancy Zeus"). If you try to enter more than 255 characters into a text field, Access will truncate the data and only store the first 255 characters. Therefore, it's important to make sure that the maximum length of your text fields is set appropriately based on the type of data you will be storing in them.

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One-millionth of a second is also referred to as a "microsecond." The prefix "micro-" means "one millionth," so a microsecond is one millionth of a second. It is commonly used to measure small intervals of time in electronics, computer science, and other fields where precise timing is important. For example, the time it takes for a computer's processor to execute a single instruction is typically measured in microseconds.

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The shortcut key for the open dialog box in MS Word is "Ctrl + F12". When you press the "Ctrl + F12" keys simultaneously in MS Word, it opens the "Open" dialog box. This dialog box allows you to browse and select a file that you want to open in MS Word. The "Alt + F12" shortcut key in MS Word is used to save a document with a new name, while "F12" is used to open the "Save As" dialog box. The "Shift + F12" shortcut key is used to save the current document. Shortcut keys are a useful way to save time and increase productivity when working in MS Word. By learning and using shortcut keys, you can perform common tasks quickly and easily, without having to navigate through multiple menus and options.

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To determine the number of binary digits contained in 10MB of a memory stick, we need to know the size of a binary digit in a memory stick. One byte consists of 8 bits. Therefore, 10MB of memory consists of: 10 x 1024 x 1024 bytes To calculate the number of binary digits, we need to multiply the number of bytes by 8: 10 x 1024 x 1024 x 8 = 83,886,080 bits Therefore, 10MB of memory stick contains 83,886,080 binary digits. In summary, the answer is "10 x 1024 x 1024 x 8" which represents the total number of bits contained in 10MB of a memory stick.

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Compared to earlier computers, modern computers are faster and smaller. This means that they can process information at a much faster rate than earlier computers and they are also more compact and easier to transport. Additionally, modern computers have more storage capacity, enabling them to store larger amounts of data. This has made them more efficient and user-friendly, making them an indispensable tool for both personal and professional use.

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The protocol used for email transmission is SMTP (Simple Mail Transfer Protocol). SMTP is a communication protocol for sending and receiving email messages over the internet. It is responsible for the transfer of email messages from one server to another until they reach the recipient's email server. SMTP is used to authenticate and encrypt email transmissions to ensure that they are secure and delivered to the intended recipient.

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All of the options listed are used to run a slide show in MS PowerPoint except for "choosing the slide show tab". The "slide show tab" is used to access and customize slide show settings, but it does not actually start the slide show. The other options listed are used to start the slide show: pressing F5 starts the slide show from the beginning, pressing shift + F5 starts the slide show from the current slide, and clicking on the slide show icon bar also starts the slide show from the beginning.

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In number system, base 16 is called "hexadecimal". We use different number systems in our daily lives to represent and manipulate numbers. The most common number system is the decimal system, which uses ten digits (0, 1, 2, 3, 4, 5, 6, 7, 8, 9) to represent all numbers. However, in some computer science and engineering applications, it is more convenient to use the hexadecimal number system, which uses 16 digits (0, 1, 2, 3, 4, 5, 6, 7, 8, 9, A, B, C, D, E, F) to represent numbers. The letters A through F are used to represent the numbers 10 through 15, respectively. For example, the decimal number 15 is represented as F in hexadecimal, and the decimal number 255 is represented as FF in hexadecimal. So, to summarize, base 16 is called "hexadecimal" because it uses 16 digits to represent numbers, and it is commonly used in computer science and engineering applications.

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A laptop computer would be the most suitable type of computer for a student who lives in a remote village without constant electricity. This is because a laptop is portable and can be easily charged using a battery or solar-powered charger, allowing the student to work even in areas with limited or no access to electricity. Additionally, a laptop can perform all the necessary functions required for studying, including research, writing, and online communication. In contrast, a desktop computer requires a constant source of electricity and is not portable, making it less practical for a student living in a remote area without a reliable source of power. Mainframe and minicomputers are not suitable for individual use, as they are typically used in large organizations and require specialized expertise to operate.

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The numbers 10, 20, 30, 40, 50, 60, and 70 in the QBASIC program represent line numbers. In QBASIC, each line of code is identified by a line number. The line numbers are used to help navigate the program, jump to specific lines, and edit the code. In the example program, line 10 is a comment that describes the program, line 20 clears the screen, line 30 asks the user for input of the value of A, line 40 asks the user for input of the value of B, line 50 multiplies A and B and stores the result in the variable PRODUCT, line 60 prints the value of PRODUCT, and line 70 ends the program.

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In the URL https://waec.org.ng, the domain name is "waec.org.ng". A domain name is a unique name that identifies a website on the internet. It is part of a larger internet address called a URL (Uniform Resource Locator), which specifies the exact location of a web page or resource on the internet. In the given URL, "waec.org.ng" is the domain name. The ".org.ng" is the top-level domain (TLD) for Nigeria, and it indicates that the website is operated by an organization based in Nigeria. The "https://" portion of the URL specifies the protocol being used to access the website, which in this case is HTTP Secure, or HTTPS. The "www" portion is a subdomain that is used to indicate the specific server that hosts the website. However, many websites nowadays omit the "www" subdomain and simply use the domain name. Therefore, the correct answer to the question is "waec.org.ng" is the domain name in the given URL.

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The key skills of a system analyst include the ability to troubleshoot, an interest in learning new skills, and proficiency in programming languages. However, motivational skills are not typically considered a key skill of a system analyst. System analysts are responsible for analyzing an organization's computer systems and procedures, designing information systems solutions to help the organization operate more efficiently and effectively, and ensuring that these solutions meet the organization's needs. The ability to troubleshoot problems and proficiency in programming languages are essential for this role, while an interest in learning new skills is important for keeping up with emerging technologies and trends in the field. Motivational skills, while important for many roles, are not typically considered a key skill for a system analyst.

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The example of information that does not fit with the other options is "plain shape of a rectangle". This is because the other options all relate specifically to measurements or calculations related to geometric shapes, while "plain shape of a rectangle" is a more general description that doesn't provide any specific information or calculation. For example, the "area of a circle" refers to the amount of space inside a circle, while the "circumference of a circle" refers to the distance around the outside of a circle. Similarly, the "perimeter of a rectangle" refers to the distance around the outside of a rectangle. In contrast, the phrase "plain shape of a rectangle" simply describes the fact that a rectangle is a four-sided shape with opposite sides that are equal in length and parallel to each other. It doesn't provide any specific information or calculation related to the rectangle, which is why it is the odd one out in this list of examples.

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In a typical compiler interface diagram, the part labelled Y represents the output of the compilation process. This output is usually in the form of machine-readable instructions that can be executed directly by a computer's processor. The specific type of output produced by the compiler depends on the programming language being used and the target machine's architecture. It could be in the form of assembly code, object code, or executable binary code. Therefore, the correct option is: object code or binary code, depending on the level of abstraction of the compilation process. However, if the diagram is showing the output after the optimization phase, then it could also be intermediate code.

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One similarity between bespoke software and application packages is that they are both meant to be used by computer end users. Bespoke software refers to custom-made software that is developed for a specific user or organization to meet their unique requirements. It is often designed and developed by professional software developers in consultation with the client. On the other hand, application packages or software packages are pre-written software programs that are designed to perform a specific set of functions and are available to the general public. These packages are developed by software companies to address the needs of a wide range of users. Despite the fact that bespoke software is custom-made and application packages are pre-written, both types of software are intended to be used by computer end-users. The purpose of both bespoke software and application packages is to provide users with software solutions that can help them perform specific tasks or solve specific problems. Therefore, the correct answer to the question is that both bespoke software and application packages are meant to be used by computer end users.

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Deleted items in computers are temporarily stored in the recycle bin. When you delete a file or folder on your computer, it is not permanently removed from your system. Instead, it is moved to the recycle bin, which acts as a holding area for deleted files. The recycle bin is a temporary storage location that allows you to retrieve files that were deleted by mistake or that you no longer need. Once you empty the recycle bin, the files are permanently deleted from your computer's memory unit. Therefore, the recycle bin serves as a safety net for deleted items and helps prevent accidental file loss.

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The logic gate in the given diagram is an AND gate. An AND gate is a digital logic gate that has two or more inputs and produces an output that is the logical conjunction of the inputs. In an AND gate, the output is only HIGH when both the inputs are HIGH. In the given diagram, the two inputs are A and B, and the output is Y. Therefore, if A and B are both HIGH, then the output Y will be HIGH, otherwise, it will be LOW.

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The correct answer is "payroll system". The other options - Corel Draw, MS Software, and MS Word - are all examples of general purpose application software. These are software programs that are designed to be used for a wide variety of tasks, such as creating documents, editing images, or managing data. A payroll system, on the other hand, is a specialized application software that is designed specifically for managing payroll processes, such as calculating employee salaries, taxes, and benefits. Therefore, it is not considered a general purpose application software.

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The exception in the given guidelines for drawing flowcharts is that it should follow a direction of right to left or bottom to top. The standard practice for drawing flowcharts is to follow a logical direction of left to right or top to bottom. This ensures that the flowchart is easy to read and understand. Flowcharts should also have a clear and logical start and finish, and should be neat, organized, and easy to follow.

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The keyboard key combination ALT + F4 in Microsoft Windows will close active programs. When you press ALT + F4, it sends a command to the operating system to close the currently active program or window. This is a quick way to exit a program when you're finished using it, rather than using the mouse to click on the "X" button at the top right corner of the window.

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EDSAC was produced using a concept known as "Stored program". The stored program concept is a fundamental idea in computer science that refers to the ability of a computer to store instructions in memory along with data. This allows the computer to retrieve and execute those instructions at a later time, without the need for human intervention. Before the advent of the stored program concept, computers were programmed using hard-wired circuitry, which made them inflexible and difficult to reprogram. However, with the stored program concept, computers became much more versatile and easier to program, leading to the development of more sophisticated software and the modern computing era. EDSAC, which stands for Electronic Delay Storage Automatic Calculator, was one of the first computers to be built using the stored program concept. It was designed and built in the late 1940s and early 1950s at the University of Cambridge, and was used for scientific research and engineering calculations. Therefore, the correct answer to the question is "Stored program".

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