Computer Science - IT MCQs
Topic Notes: Computer Science - IT
<p>MCQs and preparation resources for competitive exams, covering important concepts, past papers, and detailed explanations.</p>
Plato
- Biography: Ancient Greek philosopher (427–347 BCE), student of Socrates and teacher of Aristotle, founder of the Academy in Athens.
- Important Ideas:
- Theory of Forms
- Philosopher-King
- Ideal State
111
Which of the following characteristics does not accurately describe raw data?
Answer:
Meaningful
Data is defined as raw, unorganized facts and figures that have not yet been processed. It only becomes meaningful information after it has been organized, structured, and interpreted through a processing cycle. Therefore, calling raw data 'meaningful' is incorrect.
112
How is the quantity of records contained in a single data block formally identified?
Answer:
Blocking factor
The blocking factor represents the ratio of logical records to physical blocks. It is a critical parameter in data management that determines how data is organized and read from sequential storage media, directly impacting the efficiency of input and output operations.
113
What is the term used to describe data that has undergone processing and manipulation to become meaningful?
Answer:
Information
Raw data consists of unorganized facts and figures. Once this data is processed, organized, structured, or presented in a given context to make it useful for human interpretation and decision-making, it is formally referred to as information.
114
Which of the following is NOT considered a standard data type in computing?
Answer:
Functions
In computer science, data types define the nature of data that can be stored and processed, such as text, integers, sound, or video files. A function is a block of code or a set of instructions designed to perform a specific task; it is an operation or logic, not a type of data stored in a database or variable.
115
What term describes the number of individual records grouped together within a single block of data on magnetic tape?
Answer:
Blocking factor
The blocking factor is defined as the number of logical records contained within one physical block on a storage medium like magnetic tape. Increasing the blocking factor can improve storage efficiency and reduce the number of inter-block gaps required on the tape.
116
What is the term for a file created specifically to store a copy of important data for safety?
Answer:
Backup file
A backup file is a duplicate copy of original data, created and stored separately to ensure that information can be recovered in the event of hardware failure, accidental deletion, or other data loss scenarios.
117
What is the term for a collection of related records that represent a single unit of data?
Answer:
File
A file, often referred to as a data file or table, is a collection of related records stored together. For instance, a student file would contain all the individual records for every student in a school, organized for efficient storage and access.
118
What term describes a complete set of information regarding a specific entity within a database?
Answer:
Record
A record is a collection of related fields that provide a complete description of a single entity. For example, in a student database, a record would contain all the information related to one specific student, such as their ID, name, address, and enrollment date, grouped together as a single unit.
119
What term describes the formatted presentation of data retrieved from a database, whether viewed on a screen or printed on paper?
Answer:
Report
A report is a structured and formatted presentation of data generated from a database. Unlike a query, which is a request for data, or an entity, which is a real-world object represented in the database, a report is specifically designed for human consumption and readability in a printed or digital format.
120
What is the formal term for a collection of raw, unorganized facts and figures?
Answer:
Data
Data consists of raw facts, symbols, or figures that have not yet been processed or organized. Once data is processed, organized, and interpreted to provide meaning, it is referred to as information.