Explanation

• Access time is the time required by a computer to locate and access data.
• It is an important measure of the speed of memory or storage devices.
• Lower access time generally means faster data retrieval.

Last verified on 08-09-2026

Explanation

• Multiprocessing means using two or more processors/CPU cores to execute multiple programs or processes simultaneously (at the same time).

• Multitasking generally means running multiple tasks by sharing CPU time.
• Multiprogramming means keeping multiple programs in memory and switching the CPU among them.

Last verified on 08-09-2026

Explanation

• ABC refers to the Atanasoff-Berry Computer, an early electronic digital computer.
• The computer was developed by John Vincent Atanasoff and Clifford Berry.
• It was developed during 1939–1942.

Last verified on 08-09-2026

Explanation

• ORACLE is a Database Management System (DBMS) used for storing, retrieving, and managing data in databases.
• ORACLE is specifically designed to handle database operations.

Last verified on 08-09-2026

Explanation

• The term GIGO is related to accuracy.
• GIGO stands for Garbage In, Garbage Out.
• It means that if incorrect or poor-quality data is entered into a computer, the output will also be incorrect or unreliable.
• It emphasizes the importance of entering correct and valid data.

Last verified on 08-09-2026

Explanation

• Peopleware refers to the people who are involved in the use, development, operation, and maintenance of computer systems.
• It includes programmers, system analysts, operators, technicians, and other computer personnel.

Additional information:

• Programmer is only one type of computer professional.
• System Analyst is specifically responsible for analyzing and designing systems.

Last verified on 08-09-2026

Explanation

• System analysis is the process of studying a problem or existing system to determine what the new system should accomplish.
• It involves understanding requirements, processes, data, and system functions.
• Creating a formal model of the problem is a key part of system analysis.
• Screen design and data format/type are mainly associated with system design.

Last verified on 08-09-2026

Explanation

• XLOOKUP replaces VLOOKUP and HLOOKUP.
• Works both horizontally and vertically
• Direct return range — no column number
• Built-in "not found" option
• No need for sorted data

Additional information:

• SUM and AVERAGE — These are aggregation functions, unrelated to lookups.
• COUNT and COUNTA — These count cells; not replaced by XLOOKUP.
• IF and AND — Logical functions, not lookup functions.

Last updated 07-09-2026 by NA

Explanation

• HTTPS (Hypertext Transfer Protocol Secure) uses Port 443 for secure communication
• It protects sensitive information like passwords, credit card numbers, and personal data from being stolen or read by attackers

Additional information

• Port 80 — standard HTTP (unencrypted web traffic)
• Port 21 — FTP (file transfer)
• Port 25 — SMTP (email sending)

Last updated 07-09-2026 by NA

Explanation

• 1 Petabyte (PB) is equivalent to 1,024 Terabytes (TB) in binary measurement and 1,000 Terabytes (TB) in decimal measurement
• Binary (Base-2, used by operating systems):
• 1 PB = 1,024 TB
• 1,048,576 GB (1,024 × 1,024 GB)
• Decimal (Base-10, used by storage manufacturers):
• 1 PB = 1,000 TB
• 1,000,000,000,000,000 bytes (10¹⁵ bytes) 

Last updated 07-09-2026 by NA