Which practice preserves a recoverable copy of important data?
Correct answer: C
A backup supports recovery after loss or damage.
Computer
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Which identifier uniquely distinguishes each row in a relational table?
Correct answer: B
A primary key must uniquely identify a record.
Which database operation combines related rows from two tables?
Correct answer: D
A join uses a relationship or condition to combine records.
Which memory normally loses its contents when power is removed?
Correct answer: B
Ordinary RAM is volatile working memory.
Which component executes a computer's machine instructions?
Correct answer: A
The processor performs instruction execution.
Which spreadsheet tool summarises data by categories and aggregations?
Correct answer: C
It groups records and calculates summaries such as totals.
Which output device produces a physical copy of a document?
Correct answer: D
It converts digital output into a paper copy.
Which smallest binary unit has a value of zero or one?
Correct answer: C
A bit is a binary digit.
Which field in an email hides recipients from other recipients?
Correct answer: A
Blind carbon copy conceals those addresses in the recipient display.
Which malicious software encrypts files and demands payment?
Correct answer: D
It denies access to data and attempts extortion.
Which spreadsheet feature displays only rows meeting selected conditions?
Correct answer: B
Filtering changes which matching records are visible.
Which memory commonly stores firmware and retains data without power?
Correct answer: C
ROM is non-volatile memory used for fixed information.
What is a group of eight bits called?
Correct answer: D
A byte commonly consists of eight bits.
Which network can span cities or countries?
Correct answer: B
A wide area network covers larger distances.
Which deceptive technique tries to obtain secrets by impersonating a trusted sender?
Correct answer: D
The attacker uses false trust to induce disclosure or action.
Which spreadsheet reference keeps both row and column fixed when copied?
Correct answer: A
Dollar signs such as $B$2 fix both parts of the reference.
Which software category includes word processors and spreadsheets?
Correct answer: B
Applications support specific user tasks.
Which service translates domain names into IP addresses?
Correct answer: C
Domain Name System resolution links names with addressing information.
Which storage device has no moving mechanical parts in normal operation?
Correct answer: B
Solid-state drives store data in electronic memory.
Which protocol secures web traffic using encryption through TLS?
Correct answer: D
HTTPS protects data in transit between endpoints.
Which network usually covers a small site such as an office?
Correct answer: B
A local area network serves a limited geographical area.
Which software manages hardware resources and provides services to applications?
Correct answer: B
It coordinates memory, processes, files and devices.
Which system filters network traffic according to configured rules?
Correct answer: D
A firewall controls permitted communication.
Which input device converts a paper document into a digital image?
Correct answer: B
A scanner captures the document optically.
Evaluate the two proposed answers. Which are supported? I. Sharing a one-time password with an unsolicited caller — the suitable term or action: Keylogger. II. An attacker pretending to be a trusted sender — the suitable term or action: Trojan.
Correct answer: B
I is incorrect: Sharing a one-time password with an unsolicited caller → Unsafe credential disclosure. An OTP can authorise access or transactions. II is incorrect: An attacker pretending to be a trusted sender → Spoofing. The apparent identity or source is falsified.