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Basic Computer mcq for Competitive Exams for Students
Modern computers use which number system to represent characters and numbers internally?
a) Penta
b) Octal
c) Heka
d) Septa
e) Binary
Option e – Binary
The decimal number system consists of which range of numbers?
a) 0 or 1
b) 0 to 9
c) 0 to 7
d) 0 to 9 and A to F
Option b – 0 to 9
The binary system is also known as the
a) Base one system
b) Base two system
c) Base system
d) Binary system
Option b – Base two system
Which number system uses only ‘0’ and ‘1’?
a) Binary system
b) Barter system
c) Number system
d) Hexadecimal system
Option a – Binary system
Computers use which number system to perform calculations on stored data?
a) Decimal
b) Hexadecimal
c) Octal
d) Binary
Option d – Binary
How many basic number systems are commonly used?
a) One
b) Two
c) Three
d) Four
Option d – Four
Which of the following is a binary number?
a) 6AH1
b) 100101
c) 005
d) ABCD
e) 23456
Option b – 100101
What is the hexadecimal equivalent of the binary number (1001001)₂?
a) (40)₁₆
b) (39)₁₆
c) (49)₁₆
d) (42)₁₆
e) None of these
Option c – (49)₁₆
Convert the binary number (101110)₂ to hexadecimal.
a) (35)₁₆
b) (46)₁₆
c) (2E)₁₆
d) (50)₁₆
e) None of these
Option c – (2E)₁₆
Which code is most commonly used to represent characters with unique 8-bit codes?
a) ASCII
b) UNICode
c) BCD
d) EBCDIC
e) None of these
Option a – ASCII
A group of related files is called a
a) Character
b) Field
c) Database
d) Record
e) None of these
Option d – Record
What is called a primary key in one table that also appears in another table?
a) Physical key
b) Primary key
c) Foreign key
d) Logical key
e) None of the above
Option c – Foreign key
Which of the following is not a valid type of database key?
a) Structured primary key
b) Atomic primary key
c) Primary key
d) Composite primary key
e) None of these
Option a – Structured primary key
Oracle is categorized as
a) Hardware
b) High-level language
c) Operating system
d) System software
e) RDBMS
Option e – RDBMS
The primary purpose of a primary key in a database is to
a) Unlock the database
b) Create a data structure
c) Uniquely identify a record
d) Apply rules for database management
e) None of these
Option c – Uniquely identify a record
A stored query in a database is known as a
a) Query
b) Sort
c) Report
d) Record
e) Field
Option a – Query
Data duplication can lead to which major problem?
a) Isolation
b) Data inconsistency
c) Other than the given options
d) Program dependency
e) Separated data
Option b – Data inconsistency
A collection of electronically stored data records is called a
a) Spreadsheet
b) Presentation
c) Database
d) Webpage
Option c – Database
Names, addresses, and similar items are considered as
a) Input
b) Data
c) Output
d) Records
Option b – Data
Which database type organizes data in a tree structure with nodes?
a) Network Database
b) Hierarchical Database
c) Relational Database
d) Multiple Database
Option b – Hierarchical Database
What is the smallest piece of information in a database record called?
a) Cell
b) Field
c) Record
d) Query
Option b – Field
In database terminology, rows in a table are called
a) Relation
b) Tuples
c) Data structure
d) An entity
Option b – Tuples
The term ‘cardinality’ in a database refers to the
a) Number of databases
b) Number of columns
c) Number of rows
d) Number of tables
Option c – Number of rows
In a DBMS, tables consist of rows called ______ and columns called ______.
a) Fields, records
b) Records, fields
c) Address, fields
d) Ranges, sheet
e) Records, ranges
Option b – Records, fields
Which of the following is not a valid binary number?
a) 001
b) 101
c) 202
d) 110
e) 011
Option c – 202
Second-generation programming languages are known as
a) Machine Language
b) Assembly Language
c) Java
d) Visual Basic
Option b – Assembly Language
Which generation of programming languages closely resembles human language?
a) 1GL
b) 2GL
c) 3GL
d) 4GL
Option d – 4GL
What is an error found in a Computer program called?
a) Bug
b) Debug
c) Virus
d) Noise
Option a – Bug
An error that occurs when a program tries to access a file without opening it is called
a) Execution error messages
b) Built-in messages
c) User-defined messages
d) Half messages
e) None of the above
Option a – Execution error messages
Choosing a source language depends on:
a) The programmer’s expertise
b) Availability of the language
c) Whether the program works with other software
d) All of the above
Option c – Whether the program works with other software
Using combinations of 1’s and 0’s is a characteristic of which type of Computer language?
a) High-level language
b) PASCAL
c) Machine Language
d) C
e) COBOL
Option c – Machine Language
Languages that directly interact with hardware are known as:
a) High-level languages
b) Low-level languages
c) Middle-level languages
d) All of the above
Option b – Low-level languages
All computers process programs written in:
a) BASIC
b) COBOL
c) Machine Language
d) FORTRAN
Option c – Machine Language
Every Computer model has its unique:
a) Assembly structure
b) Machine language
c) High-level language
d) All of the above
Option b – Machine Language
Which Computer language is commonly used for complex calculations?
a) Logo
b) Fortran
c) Basic
d) C++
Option b – Fortran
LISP was created mainly for:
a) Artificial Intelligence
b) Graphical User Interface (GUI)
c) Command Line Interface (CUI)
d) Optical fiber systems
Option a – Artificial Intelligence
Which Computer language is widely used on the Internet?
a) PASCAL
b) JAVA
c) BASIC
d) Logo
Option b – JAVA
Which programming language is commonly used in game development?
a) C
b) C++
c) Java
d) SQL
Option c – JAVA
Who developed the C++ programming language?
a) Dennis Ritchie
b) Charles Babbage
c) Niklaus Wirth
d) Bjarne Stroustrup
e) John McCarthy
Option d – Bjarne Stroustrup
A compiler is a program that:
a) Stores information in a digital device
b) Operates Boolean logic
c) Converts source code to object code
d) None of the above
Option c – Converts source code to object code
An assembler is:
a) Specific to the programming language
b) Specific to syntax rules
c) Specific to the Computer model
d) Specific to the data used
Option a – Specific to the programming language
Which of the following languages is mainly used for scientific computing?
a) Fortran
b) COBOL
c) LISP
d) Prolog
Option a – Fortran
Which language is focused on string processing?
a) SNOBOL
b) COBOL
c) PASCAL
d) PERL
Option b – COBOL
Which programming language is mainly used for business applications?
a) Logo
b) COBOL
c) BASIC
d) Fortran
Option b – COBOL
ALGOL is primarily used for which purpose?
a) General applications
b) Scientific purposes
c) Engineering solutions
d) Commercial applications
Option b – Scientific purposes
Dennis Ritchie developed the C language in which year?
a) 1970
b) 1971
c) 1972
d) 1973
Option c – 1972
Which type of commands load automatically into the system memory?
a) Internal
b) External
c) Viral
d) Situational
e) None of these
Option a – Internal
Which of the following is not a mobile operating system?
a) Android
b) Safari
c) Symbian
d) iOS
e) BlackBerry
Option b – Safari
Linux is categorized as:
a) Shareware
b) Commercial software
c) Proprietary software
d) Open source software
e) Hidden software
Option d – Open source software
Restarting a Computer without turning it off is known as:
a) Cold booting
b) Warm booting
c) Shutting down
d) Logging off
e) None of these
Option b – Warm booting
A program that is currently running is called a:
a) Process
b) Instruction
c) Procedure
d) Function
Option a – Process
Assembly language:
a) Uses letter-based codes instead of binary
b) Is the easiest language to write in
c) Does not require translation into machine language
d) All of the above
e) None of these
Option a – Uses letter-based codes instead of binary
An operating system is classified as:
a) Application software
b) Accounting software
c) System software
d) Utility software
Option c – System software
A group of programs that control the computer’s operation and processing is known as:
a) Operating system
b) Computer
c) Office
d) Compiler
e) Interpreter
Option a – Operating system
Every computer runs a(n) ____ and often also runs:
a) Operating system; a client system
b) Operating system; instruction sets
c) Application programs; an operating system
d) Application programs; a client system
e) Operating system; application programs
Option e – Operating system; application programs
An operating system that permits only one user at a time is called:
a) Single-user operating system
b) Multi-user operating system
c) Single-tasking operating system
d) Multitasking operating system
e) Real-time operating system
Option a – Single-user operating system
____ is used to schedule and run multiple programs, allowing two or more users to interact efficiently with the system.
a) Time-sharing
b) Multi-sharing
c) Time-tracing
d) Multiprocessing
e) None of these
Option a – Time-sharing
DOS (Disk Operating System) does not include:
a) A boot record
b) A file allocation table
c) A root directory
d) Virtual memory
e) All of the above
Option e – All of the above
Which of the following is not a common file extension in DOS?
a) .exc
b) .bat
c) .0
d) .com
e) None of these
Option c – .0
Which DOS command is used to send what’s on the screen to an output device?
a) Break
b) Disk Copy
c) More
d) Assign
e) None of these
Option b – Disk Copy
Which DOS command is not compatible with DOS versions 1 and 2? ( Basic Computer mcq for Competitive Exams )
a) Graphics
b) Find
c) Label
d) Mode
e) None of these
Option c – Label
Which one is not considered an operating system? ( Basic Computer mcq for Competitive Exams )
a) Windows
b) DOS
c) Linux
d) Unix
e) CP/M
Option e – CP/M
Which DOS command is used to assign a name to a disk?
a) VOL
b) REN
c) LABEL
d) CLS
Option c – LABEL
When were second-generation computers developed?
a) 1949 to 1955
b) 1956 to 1965
c) 1965 to 1970
d) 1970 to 1990
Option b – 1956 to 1965
What is a single point on a computer screen called?
a) Cell
b) Element
c) Pixel
d) Bit
Option c – Pixel
Which of the following is commonly used to store user files? ( Basic Computer mcq for Competitive Exams )
a) Floppy Disk
b) Hard Disk
c) RAM
d) CD-ROM
Option a – Floppy Disk
Who is credited with inventing the Mark I computer?
a) Howard Aikin
b) J. P. Eckert
c) John Mauchly
d) John V. Atanasoff
Option a – Howard Aikin
What does ALU stand for? ( Basic Computer mcq for Competitive Exams )
a) Arithmetic Logic Unit
b) Array Logic Unit
c) Application Logic Unit
d) None of the above
Option a – Arithmetic Logic Unit
A computer program that translates the entire source code into machine language in one go is called a:
a) Interpreter
b) CPU
c) Compiler
d) Simulator
Option c – Compiler
In which year did IBM and Apple decide to work together? ( Basic Computer mcq for Competitive Exams )
a) 1978
b) 1984
c) 1990
d) 1991
Option d – 1991
The vacuum tube was not designed to function as:
a) An amplifier
b) A switch
c) A router
d) None of the above
Option c – A router
Compared to floppy disks, hard drives are:
a) More expensive
b) Easier to carry
c) Less sturdy
d) Slower to access
Option a – More expensive
Which of the following storage units offers the fastest access time?
a) RAM
b) Registers
c) Disks
d) Pen Drive
Option b – Registers
The octal equivalent of the binary number 111010 is: ( Basic Computer mcq for Competitive Exams )
a) 81
b) 72
c) 71
d) None of the above
Option b – 72
Extensive parallel processing is commonly linked with:
a) First generation
b) Fourth generation
c) Fifth generation
d) Third generation
Option c – Fifth generation
Which of the following is classified as secondary storage?
a) Keyboard
b) Disk
c) ALU
d) All of the above
Option b – Disk
Which memory is permanently programmed during manufacturing? ( Basic Computer mcq for Competitive Exams )
a) ROM
b) RAM
c) PROM
d) EPROM
Option c – PROM
CD-ROM is a widely used storage device. What does CD-ROM stand for?
a) Compactable Read Only Memory
b) Compact Data Read Only Memory
c) Compactable Disk Read Only Memory
d) Compact Disk Read Only Memory
Option d – Compact Disk Read Only Memory
Which of the following statements is correct? ( Basic Computer MCQ for Competitive Exams )
a) Computers are highly accurate but can face GIGO issues
b) Computers are dependable due to their low failure electronic components
c) Computers can work tirelessly without boredom
d) All of the above
Option d – All of the above
The full form of FORTRAN is:
a) File Translation
b) Format Translation
c) Formula Translation
d) Floppy Translation
Option c – Formula Translation
Permanent programs stored in ROM are called: ( Basic Computer MCQ for Competitive Exams )
a) Hardware
b) Software
c) Firmware
d) ROM ware
Option c – Firmware
Which memory type needs frequent refreshing?
a) Static RAM
b) Dynamic RAM
c) EPROM
d) ROM
Option b – Dynamic RAM
What is the name of the translator that converts assembly language into machine code?
a) Compiler
b) Interpreter
c) Debugger
d) Assembler
Option d – Assembler
Serial access memory is most useful when: ( Basic Computer MCQ for Competitive Exams )
a) Data is numeric
b) Fast access is needed
c) Each word requires different processing
d) Data must flow sequentially in and out
Option d – Data must flow sequentially in and out
Which mode allows two-way Communication simultaneously?
a) Full-duplex
b) Simplex
c) Half-duplex
d) None of the above
Option a – Full-duplex
Who is credited with inventing the Slide Rule? ( Basic Computer MCQ for Competitive Exams )
a) John Napier
b) William Oughtred
c) Gottfried Leibnitz
d) Blaise Pascal
Option b – William Oughtred
How can a modern digital computer be best described?
a) An automated electronic machine capable of solving problems using numbers and words
b) An advanced version of an electronic calculator
c) Any device that can perform math operations
d) A machine that processes binary codes
Option a – An automated electronic machine capable of solving problems using numbers and words
What is memory made of? ( Basic Computer MCQ for Competitive Exams )
a) Groups of wires
b) Electrical circuits
c) Numerous storage cells
d) All of these
Option c – Numerous storage cells
The term for qualitative or quantitative characteristics of data is:
a) Data
b) Information
c) Both of the above
d) None of the above
Option a – Data
Main memory is also known as: ( Basic Computer MCQ for Competitive Exams )
a) Accumulator
b) Control Unit
c) Register Unit
d) Memory
Option d – Memory
Which of the following are video-related components?
a) Resolution
b) Color depth
c) Refresh rate
d) All of the above
Option d – All of the above
The Antikythera mechanism was used for: ( Basic Computer MCQ for Competitive Exams )
a) Counting
b) Tax calculations
c) Tracking astronomical positions
d) Weapon targeting
Option c – Tracking astronomical positions
The memory unit is part of the:
a) Input device
b) Control unit
c) Output device
d) Central Processing Unit
Option d – Central Processing Unit
Microprocessors are essential for creating: ( Basic Computer MCQ for Competitive Exams )
a) Computers
b) Digital systems
c) Calculators
d) All of the above
Option d – All of the above
Which of the following is true about computer programs?
a) High-level languages need to be converted to machine code before execution
b) High-level languages always run faster and more efficiently
c) Debugging is harder in high-level languages than in low-level languages
d) All of the above
Option a – High-level languages need to be converted to machine code before execution
What does a programmable machine refer to? ( Basic Computer MCQ for Competitive Exams )
a) Computers
b) Modern televisions
c) Washing machines
d) Any machine that can be programmed for different tasks
Option d – Any machine that can be programmed for different tasks
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