WAEC PHYSICS PRACTICAL QUESTIONS ⚡️☝️
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DATA PROCESSING (ESSAY)-ANSWERS
(1a)
An operating system is like the brain of a computer. It's a software that manages and controls the computer's hardware and software resources. It provides a user-friendly interface and allows you to run applications and perform tasks on your computer.
(1aii)
(i)Resource Management: The operating system manages the computer's hardware resources such as memory, CPU, disk space, and input/output devices.
(ii)Process Management: The operating system handles the execution of programs and processes.
(1bi)
A database management system (DBMS) is a software that helps organize, store, and manage large amounts of data. It provides a structured way to store and retrieve information, making it easier to organize and analyze data.
(1bii)
In decimal, 3F6 is equal to 1014.
Now, let's convert 1014 to base 8.
1014 divided by 8 is equal to 126 with a remainder of 6.
126 divided by 8 is equal to 15 with a remainder of 6.
15 divided by 8 is equal to 1 with a remainder of 7.
So, the base 8 representation of 3F6 in hexadecimal is 1766.
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(2ai)
spreadsheet is a software application used primarily for organizing, manipulating, and analyzing data in a tabular format. It consists of rows and columns where users can input, store, and perform calculations on data. Each intersection of a row and column is called a cell and can contain text, numbers, formulas, or functions.
(2aii)
(a)Active Cell: The active cell in a spreadsheet refers to the currently selected cell where data entry, manipulation, or formatting actions take place. It's typically highlighted or bordered to indicate its selection within the spreadsheet. Users can navigate through cells to make any cell active by clicking or using keyboard commands.
(b)Cell range : cell range in a spreadsheet refers to a collection of two or more cells within a specific area of the spreadsheet. It's defined by specifying the starting cell and the ending cell of the range, usually denoted by their column letter and row number. Cell ranges are commonly used for applying formulas, performing calculations, or formatting multiple cells simultaneously. They allow users to perform operations on a group of cells collectively, streamlining data manipulation and analysis tasks in spreadsheets.
(2b)
In a Tabular form
soft copy output:
(i)nature: Digital or electronic representation of information
(ii)Accessibility:Accessed via electronic devices (computers, phones)
-Hard Copy Output-
(i)Nature: Physical, tangible representation on paper
(ii)Accessibility: Accessed by viewing or handling physical paper
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(3ai)
The internet is a global network of interconnected computers and devices that communicate through standardized protocols, enabling the exchange of data and information across the globe.
(3aii)
(i) Cybersecurity Threats: The internet poses risks such as hacking, identity theft, phishing, and other cybercrimes that compromise personal data and privacy.
(ii) Misinformation and Dependence: Easy access to information on the internet can lead to the spread of misinformation, and over-dependence on the internet can reduce critical thinking and interpersonal skills.
(3aiii)
The first generation computers were developed in the late 1940s to the mid-1950s. They were characterized by the use of vacuum tubes for circuitry and were very large in size, consuming a significant amount of electricity. These computers had limited processing capabilities, were slow in operation, and were mainly used for numerical calculations.
(3b)
(i) Dense Index: Dense indexing refers to an index structure that contains an entry for every possible search key value in a database, even if there is no corresponding record. This results in a more substantial index structure, taking up more space but providing quick access to records.
(ii) Sparse Index: Sparse indexing, on the other hand, contains entries only for some of the possible search key values.
(1a)
An operating system is like the brain of a computer. It's a software that manages and controls the computer's hardware and software resources. It provides a user-friendly interface and allows you to run applications and perform tasks on your computer.
(1aii)
(i)Resource Management: The operating system manages the computer's hardware resources such as memory, CPU, disk space, and input/output devices.
(ii)Process Management: The operating system handles the execution of programs and processes.
(1bi)
A database management system (DBMS) is a software that helps organize, store, and manage large amounts of data. It provides a structured way to store and retrieve information, making it easier to organize and analyze data.
(1bii)
In decimal, 3F6 is equal to 1014.
Now, let's convert 1014 to base 8.
1014 divided by 8 is equal to 126 with a remainder of 6.
126 divided by 8 is equal to 15 with a remainder of 6.
15 divided by 8 is equal to 1 with a remainder of 7.
So, the base 8 representation of 3F6 in hexadecimal is 1766.
•••••••••••••••••••••••••••••••••••••••••••••••••••••••••••
(2ai)
spreadsheet is a software application used primarily for organizing, manipulating, and analyzing data in a tabular format. It consists of rows and columns where users can input, store, and perform calculations on data. Each intersection of a row and column is called a cell and can contain text, numbers, formulas, or functions.
(2aii)
(a)Active Cell: The active cell in a spreadsheet refers to the currently selected cell where data entry, manipulation, or formatting actions take place. It's typically highlighted or bordered to indicate its selection within the spreadsheet. Users can navigate through cells to make any cell active by clicking or using keyboard commands.
(b)Cell range : cell range in a spreadsheet refers to a collection of two or more cells within a specific area of the spreadsheet. It's defined by specifying the starting cell and the ending cell of the range, usually denoted by their column letter and row number. Cell ranges are commonly used for applying formulas, performing calculations, or formatting multiple cells simultaneously. They allow users to perform operations on a group of cells collectively, streamlining data manipulation and analysis tasks in spreadsheets.
(2b)
In a Tabular form
soft copy output:
(i)nature: Digital or electronic representation of information
(ii)Accessibility:Accessed via electronic devices (computers, phones)
-Hard Copy Output-
(i)Nature: Physical, tangible representation on paper
(ii)Accessibility: Accessed by viewing or handling physical paper
•••••••••••••••••••••••••••••••••••••••••••••••••••••••••
(3ai)
The internet is a global network of interconnected computers and devices that communicate through standardized protocols, enabling the exchange of data and information across the globe.
(3aii)
(i) Cybersecurity Threats: The internet poses risks such as hacking, identity theft, phishing, and other cybercrimes that compromise personal data and privacy.
(ii) Misinformation and Dependence: Easy access to information on the internet can lead to the spread of misinformation, and over-dependence on the internet can reduce critical thinking and interpersonal skills.
(3aiii)
The first generation computers were developed in the late 1940s to the mid-1950s. They were characterized by the use of vacuum tubes for circuitry and were very large in size, consuming a significant amount of electricity. These computers had limited processing capabilities, were slow in operation, and were mainly used for numerical calculations.
(3b)
(i) Dense Index: Dense indexing refers to an index structure that contains an entry for every possible search key value in a database, even if there is no corresponding record. This results in a more substantial index structure, taking up more space but providing quick access to records.
(ii) Sparse Index: Sparse indexing, on the other hand, contains entries only for some of the possible search key values.
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It uses less space compared to dense indexing but might require additional steps to locate specific records due to potentially needing to traverse more index blocks.
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(5ai)
Information processing refers to the manipulation and transformation of data into meaningful information through various operations like input, processing, storage, and output, performed by a computer or a human being.
(5aii)
A single-user operating system is designed to be used by only one user at a time. It provides resources and services to that user, such as file management, task scheduling, and user interface.
WHILE
A multiple-user operating system is designed to allow multiple users to access and use the system simultaneously. It provides resources and services to multiple users, including user management, access control, and resource sharing.
(5aiii)
(i) Writing code: Programmers write instructions using programming languages to create software and applications.
(ii) Testing and debugging: Programmers test their code to identify and fix any errors or bugs before deploying the software.
(5bi)
(i) "Dropped" drop cap: This type of drop cap appears as a large capital letter at the beginning of a paragraph, with the rest of the text aligned beside it. It visually enhances the text and creates a decorative effect.
(ii) "Indented" drop cap: This type of drop cap appears as a large capital letter at the beginning of a paragraph, with the following lines of text indented to make space for the drop cap. It is often used for stylistic purposes and can give a unique and visually appealing look to the document.
(5bii)
(i) Backspace key
(ii) Delete key
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(5ai)
Information processing refers to the manipulation and transformation of data into meaningful information through various operations like input, processing, storage, and output, performed by a computer or a human being.
(5aii)
A single-user operating system is designed to be used by only one user at a time. It provides resources and services to that user, such as file management, task scheduling, and user interface.
WHILE
A multiple-user operating system is designed to allow multiple users to access and use the system simultaneously. It provides resources and services to multiple users, including user management, access control, and resource sharing.
(5aiii)
(i) Writing code: Programmers write instructions using programming languages to create software and applications.
(ii) Testing and debugging: Programmers test their code to identify and fix any errors or bugs before deploying the software.
(5bi)
(i) "Dropped" drop cap: This type of drop cap appears as a large capital letter at the beginning of a paragraph, with the rest of the text aligned beside it. It visually enhances the text and creates a decorative effect.
(ii) "Indented" drop cap: This type of drop cap appears as a large capital letter at the beginning of a paragraph, with the following lines of text indented to make space for the drop cap. It is often used for stylistic purposes and can give a unique and visually appealing look to the document.
(5bii)
(i) Backspace key
(ii) Delete key
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DATA-OBJ
1-10: BECBDDABED
11-20: ACBCDCDCCE
21-30: DBECBDACDC
31-40: BEDCCADDDE
41-50: BAEDDDEAAB
51-60: EBACBCEABA
Solved by Examkey.net
Completed!!!!
1-10: BECBDDABED
11-20: ACBCDCDCCE
21-30: DBECBDACDC
31-40: BEDCCADDDE
41-50: BAEDDDEAAB
51-60: EBACBCEABA
Solved by Examkey.net
Completed!!!!
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