Free Data Processing MCQ Question and Answers — Questions and Answers
Question 1: When a virus is present on a computer,
- A mouse is easily destroyed
- A program has not been installed
- The hard drive is filling up (Correct answer)
- Battery is not lasting long
Correct answer: The hard drive is filling up
Computer viruses often replicate themselves, creating numerous copies or generating large log files, which can rapidly consume disk space. This activity leads to the hard drive filling up, causing the computer to slow down, exhibit errors, or even crash. While viruses have various effects, consuming disk space is a common symptom of their presence and malicious activity.
Question 2: Viruses can be acquired through
- Cracked software (Correct answer)
- Putting on the computer regularly
- Switching on the computer near dusty environment
- Using a flash for one computer
Correct answer: Cracked software
Cracked software, which is pirated or illegally modified software, is a common vector for computer viruses and malware. These programs often contain hidden malicious code inserted by the crackers, allowing them to bypass security measures and infect the user's system. Downloading and installing such software poses a significant security risk.
Question 3: Among the benefits of database security is
- Confidential misconduct
- Preventing authorized user
- Ensure the data confidentiality (Correct answer)
- Prevent authorized data modification
Correct answer: Ensure the data confidentiality
Database security aims to protect sensitive information from unauthorized access and disclosure. Ensuring data confidentiality means that only authorized individuals or systems can view or access specific data, preventing breaches and maintaining privacy. This is a primary benefit, alongside ensuring data integrity and availability.
Question 4: Three commonly accepted classifications of confidentiality-related issues in database systems include all but
- Improper information release from reading data that was accessed by unauthorized users accidentally or on purpose
- The improper modification of data
- Denial-of-service threats
- Accepting and initiating unwanted popups. (Correct answer)
Correct answer: Accepting and initiating unwanted popups.
Confidentiality-related issues in database systems primarily concern unauthorized access or disclosure of sensitive data, such as improper information release, inference, and aggregation. Accepting and initiating unwanted popups, while a security nuisance or a sign of malware, is generally classified as an issue related to browser security or adware, not a core confidentiality issue within database systems themselves.
Question 5: One explanation for why people disregard index is because
- Help to avoid duplicate row data
- They make search queries much faster
- Users can improve their search against even large amounts of text that are present in any field that is indexed as such.
- They may make your queries slower instead of faster (Correct answer)
Correct answer: They may make your queries slower instead of faster
While indexes are generally designed to speed up data retrieval, they can sometimes slow down data modification operations (INSERT, UPDATE, DELETE) because the index itself must also be updated. Furthermore, poorly designed or excessive indexes can sometimes lead to the query optimizer choosing inefficient execution plans, paradoxically making certain queries slower. This potential for performance degradation during writes or with improper use is a reason why indexes might be disregarded or carefully managed.
Question 6: The following indexes don't exist in one of them.
- Indexes
- Citation
- Human (Correct answer)
- Book
Correct answer: Human
In the context of data processing and databases, an "index" is a data structure that improves the speed of data retrieval operations on a database table. Indexes are typically associated with structured data collections like books (book index), citations (citation index), or database tables. A "human" is not a type of index in this technical sense; it refers to a person.
Question 7: This kind of network, where employees have access to the client and only a few managers have access to the server, is also present in banks.
- Client - server (Correct answer)
- Wireless Network
- Status network
- Peer-to-peer
Correct answer: Client - server
A client-server network architecture is characterized by clients (e.g., employee workstations) requesting resources or services from a central server (e.g., a database server). This model allows for centralized control over data, security, and access permissions, making it ideal for environments like banks where data integrity and restricted access for different user roles (like managers vs. employees) are crucial.
Free Data Processing MCQ Question and Answers
When a virus is present on a computer,